Thursday, February 25, 2021

Samsung CW21Z453NLXXEC-Narnia-color TV – Service mode, service adjustments, software update, schematic diagram, PWB layouts

 

Ultra Slim Fit CRT, Multi Wide System, Turbo Plus, SOUND Equalizer - CW-21Z453N - S16C Chassis

Core Parts Functions
- TDA12025PQ : Video/Sound Processing1 x MICOM
- STR-W6750F : SMPS Power STR
- TDA7297SA : 5W ~ 15W Sound Output BTL AMP
- 24C16 : 16K EEPROM
- LA7845 : Vertical Deflection AMP
- C5936 : H-OUT S/W TR
- TDQ-6L : F/S PAL Tuner(LNA Option)
- TDA6107JF : R/G/B Drive AMP IC
- Flyback Trans : BSC29-0156G(11P,27KV)

Feature
- AKB(Auto Kinetic Bais)
- Comb Filter : 4H Comb Filter
- Picture Size : 4:3
- NICAM / STEREO / Line-STEREO
- Auto STEREO, Sound Equalizer, Auto Mute, Auto Volume Limit, PSEUDO STEREO, TURBO PLUS
- Composite (RCA A/V,DVD)
- Rear : 42P Scart Input/output (Scart1 R/G/B Input)
- Front or Side A/V Input (Side A/V Preferability), Headphone.

General Adjustment :
In general, a color TV can provide ideal visual quality by adjusting the basic settings such as the vertical size, horizontal size, focus, etc.
Display a black and white picture on the screen to check if the picture is clearly displayed.
If there are some 'spotted' points on the screen when displaying a black and white picture, degauss the screen using the degauss coil. If the spotted points remain, re-adjust the purity and the convergence.
This completes the basic performance examination.

These adjustments and the check list are only applied to S16C chassis-applied models.
Only use 230V for the measurement set. It is recommended using an insulation transformer when supplying power to the set so as to prevent shock to the set or to yourself.
These adjustment specifications have been created on the basis of the domestic S16C chassis-applied remote control model. Some of the contents may be changed subject to the sales location.

When replacing the MAIN Board : Tilt adjustment, Focus adjustment, Screen voltage, W/B adjustment are all required. Since the settings including the Channel information, Deflection, etc. are saved to the EEPROM, reconfigure these settings when replacing the MAIN Board.
The notation of the software information : 1. T-NARPEU-1000 refer to "NARNIA BASIC MODEL EUROPE.VER.1000"
Since the settings including the Channel information, Deflection, etc. are saved to the EEPROM, reconfigure these settings when replacing the MAIN Board.

2. When replacing the CRT Ass'y : No adjustments required.
3. When replacing the front panel Master Power switch : No adjustments required
4. When replacing the Side AV Ass'y : No adjustments required.
5. When replacing the PIP Module : No adjustments required.
6. When replacing the Control Ass'y : No adjustments required.
7. When replacing the PFC Ass'y : No adjustments required.

Service Mode

To enter Service Mode, press the keys on the remote control according to the following sequence. (in Stand-by status)

Info Menu Mute Power On

When failing to enter Service Mode, repeat the procedure above.

The initial screen of Service Mode.

Option1 XX XX XX XX XX
Option2
Deflection
WSS Deflection
Video Adjust1
Video Adjust2
Video Adjust3
Video Adjust4
Video Adjust5
YC Delay
Others
Bus Stop Off
CHECKSUM 0000
G2 Adjust
RESET
T-NARPEU-1000 2006/XX/XX

Functions of the Keys within Service Mode.

MENU > Show all menus.

/ ▼ > Move the cursor to select an item.

/ > Adjust the selected configuration value.

White Balance > x:286±3 y:290±3 Y:40±3 x:286±3,  y:290±3 Y:2.0±.3

Factory data




Software Upgrade.

1. Checking the Version of the Software (Analog SW)

1. To enter Service Mode, press the keys on the remote control according to the following sequence. (in Stand-by status)
Info 
→ Menu → Mute → Power On

2. When entering Service mode, the software information is displayed at the top of the service mode menu OSD. ex) T-HITPEU-1000 2005/0X/XX

Service Download Procedure.

Double click the your desktop “WISP” icon.

2. Check the standard.
- Check the appoint “Picasso N2”
- Check the “Flash selection” item is appoint “Manual”
- You can adjust program delay time for program speed but we use the normal “5[ms]”.
- Check the green lamp if this is sometime red lamp you can not programming.

3. Check the IIC line.
- Click the “Enter ISP Mode” button For IIC bus line problem or not,
- Change the “Press Send to enter ISP Mode”.
- Click the “Send” button.

4. Erase before program.
- Click the “Erase Flash” button for before program erase
- You can select flash selection item but we use normal “All” mode
- Change the “Select flash ROM to erase. When ready press Send.”
- Click the “Send” button

5. Write new program.
- Click the “Write Flash” button for new program download
- Change the “Load.hex file to program flashes.”
- Click the “Browse” button and find the new program folder in your computer
- Click the “Send” button.

6. Verify new program.
- Click the “Verify Flash” button
- Change the “Select flash to verify correct programming.
When ready press Send.”
- Click the “Send” button.

Adjusting the Focus.

Since the S16C chassis has a built-in single focus circuit, take care when adjusting the focus. 

When the CRT PCB, FBT or CRT has been replaced, the focus has to be adjusted according to the following procedures.

1. Display the CROSS Hatch pattern.
2. Set the Screen Adjustment to "View as Standard".
3. Turn the Static Focus VR clockwise to the maximum position.
(End of clockwise direction)
4. Slowly turn the Static Focus VR counter clockwise so that the center vertical line
is the most clearly displayed. [adjusted point : Center(2/1)]

5. Check the entire screen focus and repeat steps 3 to 4, if necessary.

Adjusting the Screen Voltage.

1. Select "Power Off Info Menu Mute Power On" to enter Service Mode.
2. Initialize all settings to the values appropriate to the corresponding model.
3. Display the Toshiba pattern.

4. First check IBRM in "G2 Adjust" of Factory and adjust Screen VR until the color of IBRM item turns green.

Adjusting the White Balance

1. Initialize all settings to the values appropriate to the corresponding model.
2. Select "Info
Menu Mute Power On" to enter Service Mode.
3. Initialize all settings to the values appropriate to the corresponding model.
4. Display the Toshiba pattern and adjust the White Balance using CA100 with the coordinates of the corresponding model.

5. Enter Video Adjust1 of Service Mode. Adjust Low/Light.
- Adjust Sub Bright to set Y.
- Adjust B Cutoff to set y.
- Adjust R Cutoff to set x.

6. Enter Video Adjust1 of Service Mode. Adjust High/Light.
- Adjust Sub Contrast to set Y.
- Adjust B Drive to set y.
- Adjust R Drive to set x.

7. Check Low/Light and readjust it if its value has been changed.

8. If you have readjusted Low/Light, readjust High/Light until the two values are identical to the coordinates of the corresponding model.

White Balance Standard Data.

Check List for the Screen Voltage and White Balance Adjustment.

1. The Screen Voltage and White Balance are connected each other, and both of them have to be configured to the correct values.
2. Adjust the White Balance after the Screen Voltage was adjusted, and check if the Screen Voltage is normal after adjusting the White Balance.
3. If the White Balance is readjusted, check the Screen Voltage again.
4. When the adjustment is finished, check the following checklist.
- If there is a spot on the screen when turning the TV set off/on, adjust the Screen Voltage again.
- If there is a ghost line on the screen, adjust the Screen Voltage again.

Names & Roles of Key Parts.
* CN601 : A 4 pin port connected to the SPEAKER port, which delivers the signal from the AMP to the speakers.
* CN602 : A 5 pin port connected to the AV ASSY, which delivers the signal to the headphone.
* CN501 : A 9 pin port connected to the CRT ASSY, which outputs the R/G/B signal to the CRT ASS'Y for display and Power signals to the CRT DRIVE.
* CN701 : A 8 pin port connected to the AV ASSY, which receives AV2 external input.


Main board and connector board functions.

Schematic diagram – Power.

Schematic diagram  - Main.

Schematic diagram – CRT and Sound.

Friday, February 19, 2021

How to enter the service mode-Emerson 39 inch LCD TV LF391EM4, Magnavox 39 inch LCD TV 39ME313V – software upgrade, service adjustments, circuit diagram, Initilize and more

 

Emerson 39 Inch LCD TV LF391EM4 A, MAGNAVOX 39ME313V-F7 A

How to set up the service mode

1.Turn the power on.
2. Press [MENU] button to display Setup menu.
3. Select “Features”.
4. Select “Software Upgrade”.
5. Select “Current Software Info”.
6. Press [0], [4], [2], [5], [7], [4] and [INFO] buttons on the remote control unit in this order. 

The following screen appears.



Purity Check Mode

This mode cycles through full-screen displays of red, green, blue, and white to check for non-active pixels.
1. Enter the service mode.
2. Each time the [7] button on the remote control unit is pressed, the display changes as follows.

3. To cancel or to exit from the Purity Check Mode, press [CH RETURN] or [PREV CH] button.

The White Balance Adjustment should be performed when replacing the LCD Panel, Digital Main CBA.

Purpose: To mix red and blue beams correctly for pure white.

Symptom of Maladjustment: White becomes bluish or reddish.

Adjustment

1.Operate the unit for more than 60 minutes.
2. Enter the service mode.
3. Press [VOLUME DOWN] button three times on the remote control unit to select “Drive setting” mode.
“Drive” appears in the screen.
4. Set the color analyzer at the CHROMA mode and zero point calibration. Bring the optical receptor pointing at the center of the LCD-Panel.

Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
5. Press [3] button to select the “HDB” for High Drive Blue adjustment. (“HDB” appears in the screen.)

6. Press [MENU] button. The internal Raster signal appears in the screen. (“Internal (Single)” appears in the upper right of the screen as shown below.)

7. Press [CHANNEL UP/DOWN] buttons to adjust the color temperature becomes 12000°K (x= 0.272  y= 0.278 ± 0.003).
8. Press [1] button to select the “HDR” for High Drive Red adjustment (“HDR” appears in the screen.) and press [CHANNEL UP/DOWN] buttons to adjust the color temperature.
9. If necessary, adjust the “HDB”, “HDR” again.
10. Press [6] button to select the “LDB” for Low Drive Blue adjustment (“LDB” appears in the screen.) and press [CHANNEL UP or DOWN] buttons to adjust the color temperature.

11. Press [4] button to select the “LDR” for Low Drive Red adjustment (“LDR” appears in the screen.) and press [CHANNEL UP or DOWN] buttons to adjust the color temperature.
12. If necessary, adjust the “LDB”, “LDR” again.
13. Press [VOLUME DOWN] button to shift to the “Debugging Message” mode.  If there is no message under “[WB]” section, this adjustment completes.
If “Drive settings are NG. Retry again.” Is displayed, repeat above steps from 5. to 12. Then check “Debugging Message” again. If “Drive settings are NG. Retry again.” is displayed, replace the LCD Panel or Digital Main CBA.

14. To cancel or to exit from the White Balance Adjustment, press [CH RETURN] or [PREV CH] button.

How to initialize the LCD TV

The purpose of initialization is to place the set in a new out of box condition. The customer will be prompted to select a language and program channels after the set has been initialized.
To put the program back at the factory-default, initialize the LCD TV using the following procedure.

NOTE: Disconnect any device from the USB Port before you conduct on this procedure.

Turn the power on.
2. Enter the service mode.
- To cancel the service mode, press [ Power ] button on the remote control unit.
3. Press [BACK] button to enter the Control Panel Key Confirmation Menu.
4. Press any button on the control panel.
5. Press [INFO] button to proceed with the self check mode.
6. Make sure to confirm the “INITIALIZED FINISH” appears in the green screen.
7. Unplug the AC Cord and plug it back on again.

FIRMWARE RENEWAL MODE

User Upgrade
(Filename example: TVNB012_00_UF_XX91_BC.ecc or TVNB2001_00_UH_XX91_BB1.bin)
Upgrade the firmware only. The setting values will not be initialized.
The User Upgrade and the Firmware Upgrade (Factory Upgrade) will be done by the same file. If you want to upgrade the firmware and initialize the setting values also, add “FACT_” at the beginning of the filename.
If you want to upgrade the firmware only and leave the setting values as they are, eliminate the “FACT_” from the filename.

Update procedure
1. Turn the power on.
2. Press [MENU] button to display Menu.
3. Select “Features”.
4. Select “Software Upgrade”.
5. Select “Upgrade” to display Upgrade screen.
6. Press [OK] button to display Software Upgrade screen.
7. Select “USB” and press [OK] button.
8. Insert the USB storage device to the USB port as shown below.

9. Select “Check” and press [OK] button.
10. Select “Upgrade” and press [OK] button to start software upgrade.

11. The update will start and the following will appear in the screen.

Note: If the screen isn’t displayed, repeat from step 1.

12. When the firmware update is completed, the following will appear in the screen.

Remove the USB storage device from the USB port.
Turn the power off and turn the power on again.

Factory Upgrade (Firmware Upgrade/Flash Upgrade)

Firmware Upgrade
(Filename example: FACT_TVNB012_00_UF_XX91_BC.ecc or FACT_TVNB2001_00_UH_XX91_BB1.bin)
Upgrade the firmware and initialize the setting values.
The User Upgrade and the Firmware Upgrade (Factory Upgrade) will be done by the same file. If you want to upgrade the firmware and initialize the setting values also, add “FACT_” at the beginning of the filename.
If you want to upgrade the firmware only and leave the setting values as they are, eliminate the “FACT_” from the filename.

Flash Upgrade
(Filename example: ALL_TVNB012_00_UF_XX91_BC.ecc or ALL_TVNB2001_00_UH_XX91_BB1.bin)
Upgrade the firmware and initialize the setting values along with the factory default such as White Balance, etc.
Before the upgrade, you will need to make a note of all the factory default so you will be able to set it back on the TV after the initialization.
The Flash Upgrade will be done by it's unique file.
The User Upgrade/Firmware Upgrade (Factory Upgrade) file cannot be used for this upgrade.

Update procedure
1. Turn the power off.
2. Insert the USB storage device to the USB port as shown below.

3. Turn the power on.
4. The update will start and the following will appear in the screen.

If the screen isn’t displayed, repeat from step 1.

5. When the firmware update is completed, the following will appear in the screen.

Remove the USB storage device from the USB port.
Turn the power off and turn the power on again.
Service mode initial screen with a word “INITIALIZED” will appear in the screen. The color of the word “INITIALIZED” will change from red to green when initialization is completed.

Power supply (SMPS) schematic

CAUTION: Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.  If Main Fuse (F602) is blown , 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.

Because a hot chassis ground is present in the power supply circuit, an isolation transformer must be used when repairing.
Also, in order to have the ability to increase the input slowly, when troubleshooting this type of power supply circuit, a variable isolation transformer is required.





Digital main schematic




Function CBA

Tuesday, February 16, 2021

Sony HCD-D60 Sony HCD-RX70 COMPACT DISC DECK RECEIVER – adjustments, schematic and wiring diagrams

 US Model HCD-D60-RX70, Canadian Model, AEP Model, UK Model - HCD-RX70, E Model - HCD-GR7-GR7J, Australian Model - HCD-GR7

  Always respect voltages. While some may not be dangerous in themselves, they can cause unexpected reactions that are best avoided. Before reaching into a powered set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.  It makes sense to avoid exposure to electrical shock.  While some sources are expected to have a possible dangerous impact, others of quite high potential are of limited current and are sometimes held in less regard.

Continuous RMS power output

Canadian model:  100+100 watts (8 ohms at 1 kHz, 5% THD)

AEP, German, East European, UK and CIS models:  55+55 watts (6 ohms at 1 kHz, 10% THD)

Other models:  70+70 watts (6 ohm sat 1 kHz, 10% THD)

Peak music power output (GR7-GR7J):  1000 watts

(AEP, German, East European, UK and CIS model):  95+95 watts (6 ohms at 1kHz, 10% THD)

CD Section:

CD Mechanism Type: CDM38-5BD29AL

Base Unit Name: BU-5BD29AL

Optical Pick-up Name: KSS-213D-Q-NP

Tape deck Section:

Model Name Using Similar Mechanism: HCD-H881

Tape Transport Mechanism Type: TCM-220WR2

SPEAKER : 

accepts impedance of 8 to 16 ohms (D60-RX70) 

accepts impedance of 6 to 16 ohms (GR7-GR7J)

SURROUND SPEAKER (US and Canadian models): 

accepts impedance of 16 ohms.
SUPER WOOFER (GR7-GR7J-RX70 : US and Canadian models): 

Voltage 1 V, impedance 1 kilo ohm

The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts.
The flexible board is easily damaged and should be handled with care.

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pickup block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.

Test mode

[MC Cold Reset]
* The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.

1. Press three buttons SPECTRUM ANALYZER , ENTER-NEXT , and DISC 1 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously, and the set is reset.

 [CD Delivery Mode]

* This mode moves the pickup to the position durable to vibration. Use this mode when returning the set to the customer after repair.
1. Press POWER button to turn the set ON.
2. Press PLAY button and POWER button simultaneously.
3. A message “LOCK” is displayed on the fluorescent indicator tube, and the CD delivery mode is set.

 [MC Hot Reset]

* This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out.
1. Press three buttons SPECTRUM ANALYZER , ENTER-NEXT , and DISC 2 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously, and the set is reset.

[Sled Servo Mode]
* This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pickup.
1. Select the function “CD”.
2. Press three buttons SPECTRUM ANALYZER , ENTER/NEXT , and FUNCTION simultaneously.
3. The Sled Servo mode is selected, if “CD” is blanking on the fluorescent indicator tube.

4. With the CD in stop status, press >> button in CD section to move the pickup to outside track, or << button to inside track.

5. To exit from this mode, perform as follows:
1) Move the pickup to the most inside track.
2) Press three buttons in the same manner as step 2.

Note:
* Always move the pickup to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.
* Do not run the sled motor excessively, otherwise the gear can be chipped.

 [Change-over of FUNCTION Name]
* The FUNCTION name of external input terminal can be changed over to VIDEO or MD.
1. Press POWER button to turn the set OFF.
2. Press POWER button together with FUNCTION button, and the power is turned on, the display of fluorescent indicator tube changes to “MD” or “VIDEO” instantaneously, and thus the FUNCTION is changed over.

[Change-over of AM Tuner Step between 9kHz and 10kHz]
* A step of AM channels can be changed over between 9kHz and
10kHz.
1. Press POWER button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “AM”.
3. Press POWER button to turn the set OFF.
4. Press ENTER-NEXT and POWER buttons simultaneously, and the display of fluorescent indicator tube changes to “AM 9k STEP” or “AM 10k STEP”, and thus the channel step is changed over.

[LED and Fluorescent Indicator Tube All Lit, Key Check Mode]
1. Press three buttons SPECTRUM ANALYZER , ENTER-NEXT , and DISC 3 simultaneously.
2. LEDs and fluorescent indicator tube are all turned on.  Press DISC 2 button, and the key check mode is activated.
3. In the key check mode, the fluorescent indicator tube displays “K 1 V0 J0”. Each time a button is pressed, “K”value increases.  However, once a button is pressed, it is no longer taken into account.
“J” value increases like 1, 2, 3 ... if rotating JOG knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “–” direction.
“V” value increases like 1, 2, 3 ... if rotating VOLUME knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “–” direction.
4. To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.

[Aging Mode]
This mode can be used for operation check of CD section and tape deck section.
* If an error occurred: The aging operation stops.
* If no error occurs: The aging operation continues repeatedly.

Aging Mode in CD Section
1-1. Operating Method of Aging Mode
1. Set discs in DISC1 and DISC2 trays.
2. Select the function “CD”.
3. Press three buttons SPECTRUM ANALYZER , ENTER-NEXT , and KARAOKE PON/MPX simultaneously.
4. The aging mode is activated, if a roulette mark on the fluorescent indicator tube is blinking.
5. In the aging mode, the aging is executed in a sequence given in “1-2. Operation during Aging Mode”. The aging continues unless an alarm occurred.
6. To exit from the aging mode, press POWER button to turn the set OFF.
* If a button other than buttons In CD section is pressed during aging, the aging in the CD section is finished.

* To execute aging to the tape deck section successively, press > button in the deck A.  “AGING” is displayed on the fluorescent indicator tube. (For the aging in tape deck, see “2. Aging Mode in Tape Deck Section”.

1-2. Operation during aging Mode
In the aging mode, the program is executed in the following sequence.

1. The disc table is ejected.
2. The disc tray turns to select a disc. (For a disc selection sequence, see Section 1-3.)
3. TOC of disc is read.
4. The pickup accesses to the last track.
5. A disc is ejected.
6. Steps 2 through 5 are repeated.

1-3. Disc Selection Sequence
* During the aging mode, discs are selected in the following sequence:

Disc 1 > Disc 2 > Disc 2 < Disc 1 >  [repeats]

2. Aging Mode in Tape Deck Section
2-1. Operating Method of Aging Mode
1. Load a commercially available 10-minute tape into the decks A and B respectively.
(If a 10-minute tape is not available, another tape may be used but a cycle time will be longer.)
2. Select the function “TAPE”.

3. Rewind tapes in advance by pressing <<  button respectively on decks A and B

4. Press three buttons SPECTRUM ANALYZER , ENTER-NEXT , and KARAOKE PON-MPX simultaneously.

5. Press PLAY button on deck A. (This button triggers the aging mode.) button on deck A. (This button triggers the aging mode.)

7. In the aging mode, the aging is executed in a sequence given in “2-2. Operation during Aging Mode”.
The aging continues unless an alarm occurred.
8. To exit from the aging mode, press POWER button to turn the set OFF

2-2. Operation during Aging Mode
In the aging mode, the program is executed in the following sequence.
1. A tape on FWD side is played for one minute.
2. PAUSE STOP is made.
3. Recording is made for 3 minutes. (For the deck not having the record function, the play is executed. In this case, > LED does not light up.)

4. FF is executed up to the end of tape.
5. A tape is reversed, and the tape on REV side is played for one minute.
6. PAUSE STOP is made.
7. Recording is made for 3 minutes. (For the deck not having the record function, the play is executed. In this case, <  LED does not light up.)

8. FF is executed up to the end of tape.
9. Steps 1 through 8 are executed for the other deck.
10. Steps 1 through 9 are repeated unless an alarm occurred.

2-3. Deck Selection Sequence
* During the aging mode, decks are selected in the following sequence:

Deck A (FWD)  >  Deck A (REV) > Deck B (REV) > Deck B (FWD) > [repeats]

PCB locations

Audio board schematic
BD board schematic
Front panel board schematic
Front panel PWB and wiring diagram
Main board PWB and wiring diagram
Main board schematic
Power amplifier board schematic
Tuner section schematic