Emerson EWC27T4, Sylvania 6727DE and Symphonic 27 inch TV-DVD-VCR combo – service mode and adjustments, SMPS schematic Firmware update

How to enter the service mode, how to make a service remote control, Universal remote control set-up codes for Emerson, sylvania and Symphonic CTVs

To Enter the Service Mode

Optical sensors system is used for Tape Start and End Sensor on this equipment. Read this carefully and prepare as described before starting to service; otherwise, the unit may operate unexpectedly.

Cover Q202 (START SENSOR) and Q201 (END SENSOR) with Insulation Tape or enter the service mode to activate Sensor Inhibition automatically.
Note: Avoid playing, rewinding or fast forwarding the tape to its beginning or end, because both Tape End Sensors are not active.

Service Mode

1. Turn power on.
2. Use service remote control unit and press "DISC MENU" key.
3. When entering the service mode, one of the numbers (1, 2 or 4) will display at corners of the screen.
4. During the service mode, electrical adjustment mode can be selected by remote control key. (Service remote control unit).

How to make service remote control unit

Prepare normal remote control unit
(Part No. NE222UD --- [ 6727DE ])
(Part No. NE223UD --- [ EWC27T4 ])
Remove 4 screws from the back lid.

Cut off pin 10 of the remote control microprocessor and short circuit pins 10 and 17 of the microprocessor with a jumper wire.

To Set up the Service mode

Use the service remote control unit.

2. Turn the power on. (Use main power on the TV unit.)
3. To enter the TV mode, press "CH o / p" button on the TV unit.
4. Press "DISC MENU" button on the service remote control unit. Version of micro computer will display on the CRT.

X-Ray protection test should be done when replacing any parts of this chassis.
1. Short both ends of R592 (on Sub CBA).
2. Confirm that the main power turns off.
3. If the main power does not turn off, then replace the following parts (D591, Q591, R592, R593, R594 and IC201)

DC 120V (+B) Adjustment

Symptom of Misadjustment: The picture is dark and unit does not operate correctly.

Note: D613 Cathode (+B), HEAT SINK, VR601 --- Main CBA
1. Connect the unit to AC Power Outlet.
2. Connect DC Volt Meter to D613 Cathode (+B) and HEAT SINK (GND).
3. Adjust VR601 so that the voltage of D613 Cathode (+B) becomes +120±1.0V DC.

CONTRAST, COLOR, TINT and V-TINT Data Values.

Enter the Service mode

2. Press "PICTURE" button on the service remote control unit. Display changes "BRT," "CNT," "COL," "TNT," and "V-TNT" cyclically when "PICTURE" button is pressed.
CONTRAST (CNT)
1. Press "PICTURE" button on the service remote control unit. Then select "CONTRAST (CNT)" display.
2. Press "CH Up/Dn” buttons on the service remote control unit so that the value of "CONTRAST (CNT)" becomes 90.
COLOR (COL)
1. Press "PICTURE" button on the service remote control unit. Then select "COLOR (COL)" display.
2. Press "CH Up/Dn" buttons on the service remote control unit so that the value of "COLOR (COL)" becomes 58

TINT (TNT)
1. Press "PICTURE" button on the service remote control unit. Then select "TINT (TNT)" display.
2. Press "CH Up/Dn" buttons on the service remote control unit so that the value of "TINT (TNT)" becomes 57.
V-TINT (V-TNT)
1. Press "PICTURE" button on the service remote control unit. Then select "V-TINT (V-TNT)" display.
2. Press "CH Up/Dn" buttons on the service remote control unit so that the value of "V-TINT (V-TNT)" becomes 56.
Note: BRIGHT data value does not need to be adjusted at this moment.

Setting for Y DL Time TV, Y DL Time EXT, Y SW LPF, Black Stretch Off, Black Stretch CONT and C. Angle Data Values
1. Enter the Service mode.
2. Y DL Time TV Adjustment: Press "0" button on the service remote control unit twice to show "D-T TV" on the display.
Y DL Time EXT Adjustment: Press "0" button on the service remote control unit three times to show "D-T EXT" on the display.
Y SW LPF Adjustment: Press "0" button on the service remote control unit four times to show "Y SW" on the display.
Black Stretch Off Adjustment: Press "0" button on the service remote control unit five times to show "B-S" on the display.

Black Stretch CONT Adjustment: Press "0" button on the service remote control unit six times to show "BS2" on the display.
C. Angle Adjustment: Press "0" button on the service remote control unit seven times to show "CANG" on the display.
3. Y DL Time TV Adjustment: Select "2" by pressing "CH Up/Dn" buttons on the service remote control.
Y DL Time EXT Adjustment: Select "2" by pressing "CH Up/Dn" buttons on the service remote control.
Y SW LPF Adjustment: Select "0" by pressing "CH Up/Dn" buttons on the service remote control.
Black Stretch Off Adjustment: Select "OFF" by pressing "CH Up/Dn" buttons on the service remote control.
Black Stretch CONT Adjustment: Select "0" by pressing "CH Up/Dn" buttons on the service remote control.
 Angle Adjustment: Select "103" by pressing "CH Up/Dn" buttons on the service remote control.

Setting for CD-VOL, DVD-BRT and DVD-SHARP Data Values

1. Enter the Service mode.
2. CD-VOL Adjustment: Press "VOL UP" button on the service remote control unit once to show "CD VOL" on the display.
DVD-BRT Adjustment: Press "VOL UP" button on the service remote control unit twice to show "DVD BRT" on the display.
DVD-SHARP Adjustment: Press "VOL UP" button on the service remote control unit three times to show "DVD SHP" on the display.
3. CD-VOL Adjustment: Select "7" by pressing "CH Up/Dn" buttons on the service remote control.
DVD-BRT Adjustment: Select "0" by pressing "CH Up/Dn" buttons on the service remote control.
DVD-SHARP Adjustment: Select "0" by pressing "CH Up/Dn" buttons on the service remote control.

H fo Adjustment
Purpose: To get correct horizontal position and size of screen image.
Symptom of Misadjustment: Horizontal position and size of screen image may not be properly displayed.

Note: R583 --- Sub CBA
1. Connect frequency counter to R583.
2. Operate the unit for at least 20 minutes.
3. Enter the Service mode. Press "2" button on the remote control unit and select HADJ mode.
4. Press "CH Up/Dn" buttons on the remote control unit so that the display will change "0" to "7."
5. At this moment, choose display "0" to "7" when the frequency counter display is closest to 15.734kHz±300Hz.
6. Turn the power off and on again.

Cut-off Adjustment
Purpose: To adjust the beam current of R, G, B, and screen voltage.
Symptom of Misadjustment: White color may be reddish, greenish or bluish.

Notes: Screen Control --- FBT (Sub CBA), FBT= Fly Back Transformer,
Use the Remote Control Unit.
1. Degauss the CRT and allow the unit to operate for 20 minutes before starting the alignment.
2. Input the Black raster signal from RF input.
3. Enter the Service mode.
4. Press the "VOL DN" button.
(Press "VOL DN" then display will change CUT OFF/
DRIVE and 7Fh adjustment).
5. Choose CUT OFF/DRIVE mode then press "1" button. This adjustment mode is CUT OFF (R).
6. Increase the screen control so that the horizontal line just appears on the CRT.
7. Press the "CH Up/Dn" button until the horizontal line becomes white.
8. Choose CUT OFF/DRIVE mode then press "2" button. This adjustment mode is CUT OFF (G). Press "CH Up/Dn" until the horizontal line becomes white.
9. Choose CUT OFF/DRIVE mode then press "3" button. This adjustment mode is CUT OFF (B). Press "CH Up/Dn" until the horizontal line becomes white.

10.Turn the power off and on again.

H. Size Adjustment
Purpose: To obtain correct size of screen image.
Symptom of Misadjustment: Size of screen image may not be properly displayed.

Note: VR531 --- Sub CBA
1. Input Monoscope pattern.
2. Adjust VR531 so that the size of Monoscope pattern are equal to each other. (90+1%/-5%)

H. Pincushion Adjustment
Purpose: To obtain straight line on the screen.
Symptom of Misadjustment: Straight line image may not be properly displayed.

Note: VR530 --- Sub CBA
1. Input Cross hatch pattern.
2. Adjust VR530 so that the lines of the Cross hatch pattern become straight.

White Balance Adjustment
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Misadjustment: White becomes bluish or reddish.

Use service remote control unit
1. Operate the unit more than 20 minutes.
2. Face the unit to the east. Degauss the CRT using a degaussing coil.
3. Input the White Raster (APL 100%).
4. Set the color analyzer to the CHROMA mode and after zero point calibration, bring the optical receptor to the center on the tube surface (CRT).
5. Enter the Service mode. Press "VOL DN" button on the service remote control unit and select "C/D" mode. (Display changes "C/D" and "7F" cyclically when "VOL DN" button is pressed.)
6. Press "4" button on the service remote control unit for Red adjustment. Press "5" button on the service remote control unit for Blue adjustment.
7. In each color mode, press "CH Up/Dn" button to adjust the values of color.
8. Adjust Red and Blue color so that the temperature becomes 9200K (x: 286 / y: 294) ±3%.
9. At this time, re-check that horizontal line is white. If not, re-adjust Cut-off Adjustment until the horizontal line becomes pure white.
10. Turn off and on again to return to normal mode. Receive APL 100% white signal and confirm that Chroma temperatures become 9200K (x: 286 / y: 294) ±3%.
Note: Confirm that Cut Off Adj. is correct after this adjustment, and attempt Cut Off Adj. if needed.

Sub-Brightness Adjustment
Purpose: To get proper brightness.
Symptom of Misadjustment: If Sub-Brightness is incorrect, proper brightness cannot be obtained by adjusting the Brightness Control.

Note: SMPTE Setup level --- 7.5 IRE
1. Enter the Service mode.

Then input SMPTE signal from RF input.
2. Press "PICTURE" button. (Press "PICTURE" button then display will change BRT, CNT, COL, TNT, and V-TNT). Select BRT and press "CH Up/Dn" buttons so that the bar is just visible.
3. Turn the power off and on again.

Focus Adjustment
Purpose: Set the optimum Focus.
Symptom of Misadjustment: If Focus Adjustment is incorrect, blurred images are shown on the display.

Note: Focus VR --- FBT (Sub CBA), FBT= Fly Back Transformer
1. Operate the unit more than 30 minutes.
2. Face the unit to the East and degauss the CRT using a degaussing coil.
3. Input the monoscope pattern.
4. Adjust the Focus Control on the FBT to obtain a clear picture.

Position Adjustment
Purpose: To obtain correct horizontal position and size of screen image.
Symptom of Misadjustment: Horizontal position and size of screen image may not be properly displayed.

Enter the Service mode.
1. Press "8" button on the remote control unit and select H-P mode.
2. Input monoscope pattern.
3. Press "CH Up/Dn" buttons on the remote control unit so that the left and right side of the monoscope pattern are equal to each other.
4. Turn the power off and on again.

V. Shift Adjustment

Purpose: To obtain correct vertical position of screen image.
Symptom of Misadjustment: If V. position is incorrect, vertical position of image on the screen may not be properly displayed.

Enter the Service mode.

1. Press "9" button on the remote control unit and select V-P mode. (Press "9" button then display will change to V-P and V-S).
2. Input monoscope pattern.
3. Press "CH Up/Dn" buttons on the remote control unit so that the top and bottom of the monoscope pattern are equal to each other.

V. Size Adjustment
Purpose: To obtain correct vertical height of screen image.
Symptom of Misadjustment: If V. Size is incorrect, vertical height of image on the screen may not be properly displayed.

Enter the Service mode.
1. Press "9" button on the remote control unit and select V-S mode. (Press "9" button then display will change to V-P and V-S).
2. Input monoscope pattern.
3. Press "CH Up/Dn" buttons on the remote control unit so that the monoscope pattern is 90±5% of display size and the circle is round.

Head Switching Position Adjustment (this is an important adjustment)
Purpose: Determine the Head Switching Position during Playback.
Symptom of Misadjustment: May cause Head Switching Noise or Vertical Jitter in the picture.
Note: Unit reads Head Switching Position automatically and displays it on the screen (Upper Left Corner).
1. Playback test tape (FL8A, FL8N).
2. Enter the Service mode.
Then press the number "5" button on the remote control unit.
3. The Head Switching position will display on the screen; if adjustment is necessary follow step 4.  6.5H(412.7µs) is preferable.
4. Press "CH UP" or "CH DN" button on the remote control unit if necessary. The value will be changed in 0.5H steps up or down. Adjustable range is up to 9.5H. If the value is beyond adjustable range, the display will change as:
Lower out of range: 0.0H
Upper out of range: -.-H
5. Turn the power off and on again.

The following 2 adjustments normally are not attempted in the field. They should be done only when replacing the CRT then adjust as a preparation.
Purity Adjustment
Purpose: To obtain pure color.
Symptom of Misadjustment: If Color Purity Adjustment is incorrect, large areas of color may not be properly displayed.

This becomes RED COLOR if the 7KEY is pressed while in service mode.
1. Set the unit facing east.
2. Operate the unit for over 30 minutes before adjusting.
3. Fully degauss the unit using an external degaussing coil.
4. Set the unit to the AUX mode which is located before CH2 then input a red raster from video in.

5. Loosen the screw on the Deflection Yoke Clamper and pull the Deflection Yoke back away from the screen.
6. Loosen the Ring Lock and adjust the Purity Magnets so that a red field is obtained at the center of the screen. Tighten Ring Lock.
7. Slowly push the Deflection Yoke toward the bell of the CRT and set it where a uniform red field is obtained.
8. Tighten the clamp screw on the Deflection Yoke.

Convergence Adjustment
Purpose: To obtain proper convergence of red, green and blue beams.
Symptom of Misadjustment: If Convergence Adjustment is incorrect, the edge of white letters may have color edges.

1. Set the unit to the AUX mode which is located before CH2 then input a dot or crosshatch pattern.
2. Loosen the Ring Lock and align red with blue dots or crosshatch at the center of the screen by rotating (RB) C.P. Magnets.
3. Align red / blue with green dots at the center of the screen by rotating (RB-G) C.P. Magnet.
4. Fix the C.P. Magnets by tightening the Ring Lock.
5. Remove the DY Wedges and slightly tilt the Deflection Yoke horizontally and vertically to obtain the best overall convergence.
6. Fix the Deflection Yoke by carefully inserting the DY Wedges between CRT and Deflection Yoke.

FIRMWARE RENEWAL

Turn the power on and press [SELECT] button on the remote control unit to put the DVD player into DVD mode. Then remove the disc on the tray.
(It is possible to move to F/W version up mode only when the DVD player is in DVD mode with the tray opened.)
2. To put the DVD player into F/W version up mode, press [9], [8], [7], [6], and [SEARCH MODE] buttons on the remote control unit in that order.
The DVD player can also enter the version up mode with the tray open. In this case, Fig. a will be shown on the screen while the tray is open.
3. Load the disc for version up.
4. The DVD player enters the F/W version up mode automatically. Fig. c appears on the screen. If you enter the F/W for different models, “Disc Error” will appear on the screen, then the tray will open automatically.

The appearance shown in (*2) of Fig. c is described as follows:

State	Appearance	No.
Reading...	Sending files into the memory	1
Erasing...	Erasing previous version data	2
Programming...	Writing new version data	3

5. After programming is finished, the tray opens automatically. Fig. e appears on the screen and the checksum in (*3) of Fig. e

At this time, no buttons are available.
6. Remove the disc on the tray.
7. Press [SELECT] button on the remote control unit to go to TV mode, or press [POWER] button on the unit to turn the power off.
8. Press [SELECT] button on the remote control unit to put the DVD player into DVD mode again.
9. Press [1], [2], [3], [4], and [DISPLAY] buttons on the remote control unit in that order.  Fig. g appears on the screen.

10.Press [CLEAR] button on the remote control unit.  Fig. h appears on the screen.

When “OK” appears on the screen, the factory default will be set. Then the firmware renewal mode is complete.
11.To exit this mode, press [CH UP/DOWN] or [SELECT] button to go to TV mode, or press [POWER] button to turn the power off.

Fixed Voltage (or Auto voltage selectable) power supply circuit is used in this unit.
If Main Fuse (F2601) is blown, first check to see that all components in the power supply circuit are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the power supply circuit to fail.

SMPS circuit diagram [Schematic]

The deck mechanism assembly is mounted on the Main CBA directly, and SW211 (REC-SAFETY SW) is mounted on the Main CBA. When deck mechanism assembly is removed from the Main CBA due to servicing, this switch cannot be operated automatically.

1. To eject the tape, press the "STOP/EJECT" button on the unit (or Remote Control).
2. When you want to record during the Service mode, press the "Rec" button while depressing SW211 (REC-SAFETY SW) on the Main CBA.

Universal remote control code list

EMERSON:  0004 0042 0049 0065 0101 0113 0119 0145 0152 0166 0191 0214 0215 0225 0324 0378 0421 0456 0460 0604 0611 0654

SYLVANIA:  0392
SYMPHONIC:  0392 0459 0510 0447 0810 0354

32PFL3406-98 – Philips Ebony LCD TV – Service mode, adjustments procedure, Power Board schematic

If a board is defective, consult your repair personal to decide if the board has to be exchanged or if it should be repaired on component level.  If your service technician says the board should be exchanged completely, do not solder on the defective board. Otherwise, it cannot be returned to the O.E.M. supplier for back charging.

Service Modes, Error Codes

The Service Mode feature is split into four parts:
• Service Default Mode (SDM).
• Service Alignment Mode (SAM).
• Customer Service Mode (CSM).
• Computer Aided Repair Mode (ComPair)

Service Default Mode (SDM)

Set the TV in SDM mode in order to be able to create a predefined setting for measurements to be made. In this platform, a simplified SDM is introduced (without protection override and without tuning to a predefined frequency).

How to Activate SDM
To activate SDM, use the following methods:
• Press the following key sequence on the RC transmitter: “062596”, directly followed by the “MENU” button.
Note: It is possible that, together with the SDM, the main menu will appear. To switch it “off”, push the “MENU” button again.
After activating this mode, “SDM” will appear in the upper left corner of the screen (when a picture is available)

On Screen Menu
After activating SDM, the following items are displayed, with “SDM” in the upper right corner of the screen to indicate that the television is in Service Default Mode. Menu items and explanation:
• xxxxx Operating hours (in decimal).
• AAAAAB X.YY See paragraph Software Identification, Version, and Cluster for the SW name definition.
• ERR Shows all errors detected since the last time the buffer was erased in format <xxx> <xxx> <xxx> <xxx> <xxx> (five errors possible).
• OP Used to read-out the option bytes. Ten codes (in two rows) are possible.

How to navigate
As this mode is read only, there is not much to navigate. To switch to other modes, use one of the following methods:
• Command MENU from the user remote will enter the normal user menu (brightness, contrast, colour, etc...) with “SDM” OSD remaining, and pressing MENU key again will return to the last status of SDM again.
• To prevent the OSD from interfering with measurements in SDM, command “OSD” or “i+” (“STATUS” or “INFO” for NAFTA and LATAM) from the user remote will toggle the OSD “on/off” with “SDM” OSD remaining always “on”.

How to Exit SDM
• Switch the set to Stand-by, by pressing the standby button on the remote control transmitter or on the television set.
• Via a standard customer RC-transmitter: key in “00”-sequence.
Note: If the TV is switched “off” by a power interrupt while in SDM, the TV will show up in the last status of SDM menu as soon as the power is supplied again. The error buffer will not be cleared.

Service Alignment Mode (SAM)

Purpose
• To modify the NVM.
• To display/clear the error code buffer.
• To perform alignments.

How to Activate SAM
To activate SAM, use one of the following methods:
• Press the following key sequence on the remote control transmitter: “062596”, directly followed by the “OK” button.
Do not allow the display to time out between entries while keying the sequence.
• Or via ComPair.
After entering SAM, the following items are displayed, with “SAM” in the upper right corner of the screen to indicate that the television is in Service Alignment Mode.

How to Navigate
• In the SAM menu, select menu items with the UP/DOWN keys on the remote control transmitter. The selected item will be indicated. When not all menu items fit on the screen, use the UP/DOWN keys to display the next/previous menu items.
• With the “LEFT/RIGHT” keys, it is possible to:
– (De) activate the selected menu item.
– (De) activate the selected sub menu.
– Change the value of the selected menu item.
• When you press the MENU button twice while in top level SAM, the set will switch to the normal user menu (with the SAM mode still active in the background). To return to the SAM menu press the MENU button.
• The “INFO [i+]” key from the user remote will toggle the OSD “on/off” with “SAM” OSD remaining always “ON".
• Press the following key sequence on the remote control transmitter: “062596” directly followed by the MENU button to switch to SDM (do not allow the display to time out between entries while keying the sequence).

Remarks: new RC will not have I+ button, but function still remain.

How to Store SAM Settings

To store the settings changed in SAM mode (except the RGB ALIGN settings), leave the top level SAM menu by using the POWER button on the remote control transmitter or the television set. The mentioned exceptions must be stored separately via the STORE button.

How to Exit SAM
Use one of the following methods:
• Switch the set to STANDBY by pressing the mains button on the remote control transmitter or the television set.
• Via a standard RC-transmitter, key in “00” sequence.
Note: When the TV is switched “off” by a power interrupt while in SAM, the TV will show up in “normal operation mode” as soon as the power is supplied again. The error buffer will not be cleared.

Blind SAM Display Option Code Selection

When after an SSB or display exchange, the display option code is not set properly, it will result in a TV with “no display”.
Therefore, it is required to set this display option code after such a repair.
To do so, press the following key sequence on a standard RC transmitter: “062598” directly followed by MENU and “xxx”, where “xxx” is a 3 digit decimal value of the panel type: see column “Display Code” below:

When the value is accepted and stored in NVM, the set will switch to Stand-by, to indicate that the process has been completed.
During this algorithm, the NVM-content must be filtered, because several items in the NVM are TV-related and not SSB related (e.g. Model and Prod. S/N). Therefore, “Model” and “Prod. S/N” data is changed into “See Type Plate”. In case a call centre or consumer reads “See Type Plate” in CSM mode, he needs to look to the side/bottom sticker to identify the set, for further actions.

Error Codes

Error codes are required to indicate failures in the TV set. In principle a unique error code is available for every.
• Activated (SW) protection.
• Failing I2C device.
• General I2C error.
The last five errors, stored in the NVM, are shown in the Service menu’s. This is called the error buffer.
The error code buffer contains all errors detected since the last time the buffer was erased. The buffer is written from left to right. When an error occurs that is not yet in the error code buffer, it is displayed at the left side and all other errors shift one
position to the right.
An error will be added to the buffer if this error differs from any error in the buffer. The last found error is displayed on the left.
An error with a designated error code never leads to a deadlock situation. It must always be diagnosable (e.g. error buffer via OSD or blinking LED or via ComPair).
In case a failure identified by an error code automatically results in other error codes (cause and effect), only the error code of the MAIN failure is displayed.

Errors code information:
• Error 000: No problem.
• Error 011: I2C bus error. When this error occurs, the TV will not start up due to the blocked bus.
• Error 012: Tuner error. There is no I2C communication towards the tuner after start-up.
• Error 013: Panel VCC error. This voltage is made in the power supply and results in protection in case of absence.

How to Clear the Error Buffer

You can read the error buffer in three ways:
• On screen via the SAM/SDM/CSM (if you have a picture).
Example:  – ERROR: 0 0 0 0 0: No errors detected.

– ERROR: 6 0 0 0 0: Error code 6 is the last and only detected error.
– ERROR: 9 6 0 0 0: Error code 6 was detected first and error code 9 is the last detected (newest) error.
• Via the blinking LED procedure (when you have no picture)

Errors code information:
• Error 000: No problem.
• Error 011: I2C bus error. When this error occurs, the TV will not start up due to the blocked bus.
• Error 012: Tuner error. There is no I2C communication towards the tuner after start-up.
• Error 013: Panel VCC error. This voltage is made in the power supply and results in protection in case of absence.

How to Clear the Error BuffeThe error code buffer is cleared in the following cases:
• By using the CLEAR command in the SAM menu.
• By using the following key sequence on the remote control transmitter: “062599” directly followed by the OK button.
• If the contents of the error buffer have not changed for 50 hours, the error buffer resets automatically.
Note: If you exit SAM by disconnecting the mains from the television set, the error buffer is not reset.

The Blinking LED Procedure

The software is capable of identifying different kinds of errors.
Because it is possible that more than one error can occur over time, an error buffer is available, which is capable of storing the last five errors that occurred. This is useful if the OSD is not working properly.
Errors can also be displayed by the blinking LED procedure.
The method is to repeatedly let the front LED pulse with as many pulses as the error code number, followed by a period of 1.5 seconds in which the LED is “off”. Then this sequence is repeated.
Example (1): error code 4 will result in four times the sequence LED “on” for 0.25 seconds / LED “off” for 0.25 seconds. After this sequence, the LED will be “off” for 1.5 seconds. Any RC command terminates the sequence. Error code LED blinking is
in red color

Example (2): the content of the error buffer is “12 9 6 0 0” After entering SDM, the following occurs.
• 1 long blink of 5 seconds to start the sequence.
• 12 short blinks followed by a pause of 1.5 seconds.
• 9 short blinks followed by a pause of 1.5 seconds.
• 6 short blinks followed by a pause of 1.5 seconds.
• 1 long blink of 1.5 seconds to finish the sequence.
• The sequence starts again with 12 short blinks

Additionally, the entire error buffer is displayed when Service Mode “SDM” is entered.

NVM Editor

In some cases, it can be convenient if one directly can change the NVM contents. This can be done with the “NVM Editor” in SAM mode. With this option, single bytes can be changed.

• Do not change these, without understanding the function of each setting, because incorrect NVM settings may seriously hamper the correct functioning of the TV set!
• Always write down the existing NVM settings, before changing the settings. This will enable you to return to the original settings, if the new settings turn out to be incorrect.

Load Default NVM Values

It is possible to upload the default values to the NVM with ComPair in case the SW is changed, the NVM is replaced with a new (empty) one, or when the NVM content is corrupted.
After replacing an EEPROM (or with a defective/no EEPROM), default settings should be used to enable the set to start-up and allow the Service Default Mode and Service Alignment Mode to be accessed.

Display option code
Attention: In case the SSB is replaced, always check the Display Code in CSM, even when picture is available.
Performance with the incorrect display option code can lead to unwanted side-effects for certain conditions.

Reset of Repaired SSB

A very important issue towards a repaired SSB from a Service repair shop (SSB repair on component level) implies the reset of the NVM on the SSB.
A repaired SSB in Service should get the service Set type “00PF0000000000” and Production code “00000000000000”.
Also the virgin bit (MENU > Setup > TV settings > Reinstall TV > Start now) is to be set. To set all this, you can use the ComPair tool or use the “NVM editor” and “Service Data” items in SAM (do not forget to “store”).
After a repaired SSB has been mounted in the set (set repair on board level), the type number (CTN) and production code of the TV has to be set according to the type plate of the set. For this, you can use the NVM editor in SAM. The loading of the CTN and production code can also be done via compare (Model number programming).
In case of a display replacement, reset the “Operation hours display” to “0”, or to the operation hours of the replacement display.

SSB (Small Signal Board)

Power Supply Unit
Before checking other parts first check whether fuse on the PSU is not broken. Always replace a defective fuse with one with the correct specifications. This part is available in the regular market.
Consult the Philips Service web portal for the order codes of the boards.

The output voltages to the chassis are:
• +5V-STANDBY (Stand-by mode only)
• +12V (on-mode)
• +18V for audio circuit

The diversity in power supply units is mainly determined by the diversity in screen sizes, but please note to always order the correct replacement.

The on-board DC/DC converters deliver the following voltages (depending on set execution):
• +5V-STANDBY, permanent voltage for the Stand-by controller, LED/IR receiver and controls; connector CN701 pin 11 and 12.
• +12V, input from the power supply for panel and tuner; connector CN701 pins 3 and 4.
• +24V, input from the power supply for audio (in active mode); connector CN701 pins 8 and 9

Connector CN701 overview [Click on the pictures to magnify]

SMPS 715G5143 PSU circuit diagram and PWB

Used ICs: LD7591GS, A6069H

Inverter schematic

Used ICs: OZ9976GN-C-O-TR

PWB

PWB layout

AV33 and DV33 (U701)

The circuit around U701 will provide the main 3.3 V power supply to the SSB

Audio Mute circuit
This circuit will provide a “high-to-low” pulse when the +5 V SSB power line goes low. This will trigger the related audio mute circuit, preventing the audio circuit making uncontrolled sounds.

Demodulator
MT5301B supports Full-HD MPEG1/2/4/DIVIX/VC1/RM/ H.264/AVS Video decoder standards, and JPEG. A 3D comb filter added to the TV decoder recovers great details for still pictures.

Overall Features:
• Worldwide multi-standard analog TV demodulator.
• Integrated a multi-standard video decoder.
• Embedded SAW filter and IF Amplifier.
• Accept low IF frequency.
• On-chip 54 MHz 10-bit video ADC

Tuner
The tuner covers as followed:
• VHF LOW BAND: from 49.75 MHz to 148.25 MHz.
• VHF HIGH BAND: from 156.25 MHz to 448.25 MHz.
• UHF BAND: from 456.25 MHz to 863.25 MHz. I2C bus control of tuner, address selection.

How to enter the service mode, adjustments, troubleshooting, schematic– Using ICs LA76812, LA78040, LA7841, LA7845, LC863232A

Color TVs using LA76812/LA76814/LC863232A-5V57, AT24C04, TDA7056Q, LA78040/LA7841/LA7845, PC817, BSC2433553-6P/BSC25-3355-8/BSC29-3801-13R LOTs

Excessive high voltage can produce potentially hazardous X-ray radiation.
To avoid such hazards, the high voltage must not be above 31.0KV(14") or 35.0KV(21") under any conditions. The normal value of the high voltage of this television is 22.5KV(14") or 26.5KV(21") at max beam current (maximum brightness) under a 90-260V, 50/60HZ AC power source.

Service should not be attempted by anyone unfamiliar with the necessary precautions on this television. The followings are the necessary precautions to be observed before servicing.
1). Since the chassis of this television is directly connected to the AC-power line (HOT chassis), an isolation transformer should be used during any dynamic service to avoid possible shock hazard.
2). Always discharged the picture tube anode to the CRT conductive coating before handing the picture tube. The tube is highly evacuated and, if broken, glass fragments will be violently expelled. Use shatterproof goggles and keep picture tube away from the body while handing.
3). When replacing a chassis in the cabinet, it always is certain that all the protective devices are put back in place, such as non-metallic control knobs, insulating covers, shields isolation resistor-capacitor network, etc

4). Before returning the set to the customer, always perform an AC leakage current check on the exposed metallic parts of the cabinet such as terminals, screws, metal overlays control shafts, etc., to insure that the set is safe to operate without danger of electrical shock.

Many electrical parts in this chassis have special safety-related characteristics. These characteristics are often passed unnoticed by a visual inspection and the protection afforded by them cannot necessarily be obtained by using replacement, rated for higher voltage, wattage, etc.  Replacement parts with special safety characteristics must be replaced with the same number. The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock, fire, X-ray radiation of other hazards.

Automatic Degaussing

A degaussing coil is mounted around the picture tube, so that external degaussing after mobbing the TV should be unnecessary. But the receiver must be properly degaussed upon installation. The degaussing coil operates for about 1 second after the power is switched ON. If the set is moved or turned in a different direction, the power should be OFF for at least 15 minutes. If the chassis or parts of the cabinet become magnetized, poor color purity will result. If this happens, use an external degaussing coil. Slowly move the degaussing coil around the faceplate of the picture tube, the sides and the front of it, slowly withdraw the coil to a distance of about 6 feet before turning power OFF.

Method of access to the service mode

Using the remote control performs the following steps:

1. Press the RECALL key on the remote control and the volume key minus (V-) on the TV at the same time. The service mode screen will appear on the screen of the TV the word FACTORY, indicating that it is in mode of service.

2. To enter the B / W mode (white balance) flies to press RECALL on the remote control and volume less on the TV at Same time

3. For color adjustments, vertical, press RECALL again the remote control and volume less on the TV at the same time

4. To return to the original TV position press the KEY RETURT on the remote control and turn off the TV. ".

Line Mode

After being in service mode, you can RGB bias, pressed "0" to decrease "S-BRI"; pressing "1" to increase "S-BRI".

Pressing "2" to decrease "R-BIA"; pressing "3" to increase "R-BIA". Pressing "4" to decrease "G-BIA";

pressing "5" to increase "G-BIA". Pressing "6" to decrease "B-BIA"; press "7" to increase "B-BIA".

B / W Balance Adjusts

After setting RGB bias to, press "Mute" to return to the mode

"B / W BALANCE", then press CH + or CH- to select the items in the "B / W BALANCE" table, press VOL + or VOL- to select the items.

ADJUST Mode (Preset related to tube used)

En el modo "ADJUST", ud puede ajustar size, picture position, sub picture status, OSD position, AGC status etc. , press CH+ or CH- to select items in the " ADJUST " Table, press VOL+ or VOL- to adjust selected item.

SETUP Mode

In the "SETUP" mode, you can select the options, AV / TV option, OSD option, power ON / OFF option etc. , press CH + or CH to select the items in the "SETUP" table, pressing VOL + or VOL- to select the settings.

Troubleshooting

No grating, no picture, no sound

General, these failures are produced by power sources, because of which refer to a wider area, so that can be divided them two conditions to explain: no +B 110 V and existing +B 110V.
(1) No +B (110V) voltage (voltage of network AC 90～ 260V ) These failures may be caused by power supply switch.

Existing +B 110 V
These failures may be caused by abnormal operation of horizontal scan, to confirm which can observe the filament of tube whether bright on.
If determined horizontal scan in abnormal operation, look for the failure start from the horizontal drive stage. Search upward to LA76812 with method of checking DC voltage and waveform according to sequence: PIN27/H.OUT port→ PIN25 power supply→VD622 output

Existing grating and no picture
Because of the picture video signals and OSD characters display are input from PIN44, PIN15, PIN16, PIN17 of LA76812(N201), so to observe characters on screen of faulted TV can determine the approximate area of fault.

Existing grating, no picture and sound
Processing according Existing grating and no picture” at first, let the picture display normally, then check sound.

CPU non-operating

This chassis is consisted of main chip LA76812 controlled by Sanyo I2C bus and CPU LC863232A.
LA76812 is a performance and quality IC including PIF, SIF, AFC, V/C/D, etc circuits.
TDA7056B used in BTSC sound system is a power amplifier.
CXA2104S is a BTSC decode function IC.
LA4225A used in MONO sound system is another power amplifier
LA78040 is used for vertical power amplifier

UE46F70 Samsung LED LCD TV-firmware update, connector voltages, service mode adjustments, connector voltages

Samsung UE40F70****/ UE46F70****/ UE55F70****- LED TV Chassis : U89A

TV System – Tuning - Frequency Synthesize

System - UF70** ZG/XH/ZT/XE/XU - 1 PAL/SECAM/NIM/QAM/Cable/T2/S2 tuner

UF70** ZG(Germany only) other EU - 1 PAL/SECAM/NIM/QAM/Cable/S2 tuner

Audio

Audio : DTS Premium Audio 5.1
• Speaker Type : Down Firing + Full Range
• Sound Output (RMS) : 20 W (10 x 2)

[3D, MOIP, Media Bridge, Allshare, Internet TV, Built-in Wi-Fi, Full Browser, Bluetooth]

Codecs may not function properly if there is a problem with the content data. Video content does not play or does not play correctly if there is an error in the content or container. "Sound or video may not work if they have standard bit rates/frame rates above the TV’s compatibility ratings." If the Index Table is wrong, the Seek (Jump) function does not work.  "When playing video over a network connection, the video may not play smoothly because of data transmission speeds."
Some USB/digital camera devices may not be compatible with the player.

• Supports up to H.264, Level 4.1 (does not support FMO/ASO/RS)
• VC1 AP L4 is not supported.
• All video codecs excluding WMV v7, v8, MSMPEG4 v3, MVC, and VP6:
- Below 1280 x 720: 60 frame max
- Above 1280 x 720: 30 frame max
• GMC is not supported.
• Supports SVAF top/bottom and left/right only.
• Supports Blu-ray/DVD MVC specs only.

Smart Control
The Smart Touch Control makes it easier and more convenient to use the TV. For example, you can use the remote control's built-in touchpad to move the focus and make selections as you would on a computer using a mouse. In addition, you can use the virtual control panel displayed on the screen to change channels, play media fles, and access favorites

Connecting to the TV
In order to operate the TV using a Smart Touch Control unit, you must frst pair it to the TV via Bluetooth.
1. To turn on the TV, point the Smart Touch Control at the remote control receiver of the TV and press the TV button. The remote control receiver's location may vary depending on the model.
2. A Bluetooth icon will appear at the bottom left of the screen as shown below. The TV will then attempt to connect to the Smart Touch Control unit automatically.

Reconnecting the Smart Touch Control Unit
If you need to reestablish the connection between the TV and the Smart Touch Control unit, press the pairing button at the back of the Smart Touch Control unit.

The pairing button can be accessed by removing the control unit's battery cover. Pressing the pairing button automatically reestablishes the connection between the control unit and the TV.

Reconnecting the Smart Touch Control Unit
Use the touchpad to perform various commands. Navigate to Guide (System → Device Manager → Smart Touch Control Settings → Guide) to view an on-screen guide to using the Smart Touch Control.

Dragging
Drag on the touchpad in the desired direction. Move the focus or the pointer in the direction the fnger is dragging.

Tap
Tap on the touchpad. This selects the focused item.

Flicking
Flick on the touchpad in the desired direction. This moves the focus or scrolls the screen based n the direction and speed of the flick.

Tapping and Holding

Tap and hold on the touchpad for at least 3 seconds. This gives you access to hidden features included in certain applications.

Tapping and Dragging
Tap on the touchpad, drag and release. This moves the selected web item in a webpage or your current location on a map.

Scrolling Up/Down
Scroll up/down the line on either the left or right edge of the touchpad. This scrolls a webpage or a list up/down. This scrolling feature easily accommodates both right-handed and left-handed users.

Scrolling Left/Right
Scroll left/right on the line at the top or bottom edge of the touchpad. This scrolls a horizontal webpage or the Smart Hub panel to the left/right.

Troubleshooting

1. Check the various cable connections frst.
- Check to see if there is a burnt or damaged cable.
- Check to see if there is a disconnected or loose cable connection.
- Check to see if the cables are connected according to the connection diagram.
2. Check the power input to the Main Board.

How to distinguish if the problem is caused by Main Board or T CON
- No Video
If the problem is No Video but BLU is on and Indication LED is blinking repeatedly and faster than nomal booting, replace the T-CON board.
- Distorted Picture
Check the inner patterns.

How to check inner pattern

Enter the service mode ⇢ Choose ‘SVC’ ⇢ Check the ‘internal pattern.

Problems and Solutions

Some application content only appears in English.  How can I change the language?

• The application content language may be different from the user interface language.
• The ability to change the language depends on the service provider

Some application services do not work

• Check with the service provider.
• Refer to the help section on the application service provider’s website.

Some files can’t be played back

• This problem may occur with high-bitrate flees. Most files can be played back, but you might experience problems with high-bitrate files

Web Browser
1. Select Web Browser. The browsing screen may differ from the one on your computer.
2. The web browser is not compatible with Java applications.
3. You cannot download files. If you attempt to download a file, you will receive an error message instead.
4. The web browser may not be able to access certain websites.
5. Playing Flash videos may be restricted.
6. E-commerce for online purchases is not supported.
7. With websites that have scrollable windows, scrolling through such a window can result in corrupted characters.
8. ActiveX is not supported.
9. Certain options are not accessible in Link Browsing mode. (Switch to Pointer Browsing to activate this.)
10. Only a limited number of fonts are supported. Certain symbols and characters may not be displayed properly.
11. The response to remote commands and the resulting on-screen display may be delayed while a webpage is loading.
12. Loading a webpage may be delayed or suspended completely with certain operating systems.
13. The copy and paste operations are not supported.
14. When composing an email or a simple message, certain functions such as the font size and color selection may not be available.
15. There is a limit to the number of bookmarks and the size of the log fle that can be saved.
16. The number of windows that can be opened concurrently varies depending on the search conditions and the TV model.
17. The web browsing speed will vary depending on the network environment.
18. Playing embedded video automatically disables PIP. Video playback may not commence after PIP is disabled. In this case, you will have to reload the page.
19. The web browser supports .mp3 audio files only.
20. The web browser supports a specific file format for importing and exporting bookmarks. (Compatible Format: Netscapebookmarkfle- 1)
21. The folder tree information is not included when importing and exporting bookmarks.

22. Exporting bookmarks to a USB device connected to the TV saves the bookmarks under a folder named "Samsung SmartTV Bookmark".
23. If Clock (System > Time > Clock) has not been enabled, the browsing history will not be saved.
24. The browsing history is saved in the order of latest to oldest, with the oldest entries being overwritten frst.
25. Depending on the types of video/audio codecs supported, it might not be possible to play back certain video and audio fles during Flash playback.
26. A sudden change in the picture brightness inside a video window may affect the brightness of the screen. This problem applies to PDP TVs only.
27. Video sources from PC-optimized streaming service providers may not play properly on our proprietary web browser.
28. Using the on-screen QWERTY keyboard automatically disables PIP. (Except when entering a URL.)

Entering Factory Mode

To enter ‘Service Mode’ Press the remote -control keys in this sequence.

White Balance Calibration

1. Into the Factory Mode.
2. Select ADC/WB menu.
3. Select ADC menu

Adjustment

Color Calibration

Method of Color Calibration (AV)
1. Apply the NTSC Lattice (N0. 3) pattern signal to the AV IN 1 port.
2. Press the Source key to switch to “AV1” mode.
3. Enter Service mode.
4. Select the “ADC” menu.
5. Select the “AV Calibration” menu.
6. In “AV Calibration Off” status, press the “► ” key to perform Calibration.
7. When Calibration is complete, it returns to the high-level menu.
8. You can see the change of the “AV Calibration” status from Failure to Success.

Method of Color Calibration (Component)
1. Apply the 720p Lattice (N0. 6) pattern signal to the Component IN 1 port.
2. Press the Source key to switch to “Component1” mode.
3. Enter Service mode.
4. Select the “ADC” menu.
5. Select the “Comp Calibration” menu.
6. In “Comp Calibration Off” status, press the “ ►” key to perform Calibration.
7. When Calibration is complete, it returns to the high-level menu.
8. You can see the change of the “Comp Calibration” status from Failure to Success.

Method of Color Calibration (PC)
1. Apply the VESA XGA Lattice (N0. 21) pattern signal to the PC IN port
2. Press the Source key to switch to “PC” mode
3. Enter Service mode
4. Select the “ADC” menu
5. Select the “PC Calibration” menu.
6. In “PC Calibration Off” status, press the “ ►” key to perform Calibration.
7. When Calibration is complete, it returns to the high-level menu.
8. You can see the change of the “PC Calibration” status from Failure to Success.

Method of Color Calibration (HDMI)
1. Apply the 720p Lattice (N0. 6) pattern signal to the HDMI1/DVI IN port.
2. Press the Source key to switch to “HDMI1” mode.
3. Enter Service mode.
4. Select the “ADC” menu.
5. Select the “HDMI Calibration” menu.
6. In “HDMI Calibration Off” status, press the “►” key to perform Calibration.
7. When Calibration is complete, it returns to the high-level menu.
8. You can see the change of the “HDMI Calibration” status from Failure to Success.

9. Into the Factory Mode.
10. Select ADC/WB menu.
11. Select White Balance menu

Software Upgrade
Software Upgrade can be performed by downloading the. latest frmware from samsung.com to a USB memory device.
• Current Version - The software already installed in the TV.
Software is represented as ‘Year/Month/Day_Version’.

How to Check the Software Version
Use the Main Menu
1. Click the "MENU" key in remote controller.
2. Select "Support" menu.
3. Locate the menu cursor "Software Upgrade" menu.
4. Click the "INFO" key.
- Check the Main SW and Micom version.

How to Upgrade Software

Insert a USB drive containing the firmware upgrade downloaded from samsung.com into the TV.
NOTE
1. Please be careful not to disconnect the power or remove the USB drive while upgrades are being applied.
2. The TV will turn off and turn on automatically after completing the firmware upgrade.
3. Please check the firmware version after the upgrades are complete.
- the new version will have a higher number than the older version.

NOTE
• When software is upgraded, video and audio settings you have made will return to their default (factory) settings.
• We recommend you write down your settings before beginning firmware update.
4. After update is completed, restore your previous settings.

Main Software Upgrade

Store the sw program named "T-FXPDEUC" in USB memory stick.
Click the "MENU" key in Remote Controller.
Select "Support - Software Update - Update Now" menu.
Click the "ENTER" key.
• Wait for upgrade complete.
• Check the Software Version

Sub Software Upgrade
USB Download
1. After Main Software upgrade, Enter the Factory menu by below method.
- Factory Remocon
• Click the Remocon button continually. (Info key+ Factory key)

Connector voltages

Click on the pictures to magnify