How to troubleshoot Sony Bravia WAX Chassis (LCD) TV - Repair Tips

Power supply
TV does not turn on:
> The first check that must be made is to check that the red LED, located on the front panel of the appliance is switched on.
Confirm the 5V Standby voltage on the connector CN6203 - pin 1 (PCI G2)

TV does not have standby voltage 5V:

> Confirm the voltage of 170V (at 110V) or 308V (at 220V) at pin 5 of the IC6300. It is voltage is required for the startup of the IC6300. If there is no voltage on pin 5, check the F6000 fuse, the D6300 rectifier bridge, and the TH6300 thermistor.

> Confirm the 16.1V voltage on pin 2 of the IC6300. This tension should remain constant. If the voltage increases and the appliance switches off immediately, the IC6300 must not be controlling the working frequency of the T6300 transformer;

> Confirm the frequency of pins 7 and 8 of the IC6300 relative to GND - pin 3. This should be at approximately 100 to 120KHz. If it is too high below this range, then there is a problem on some secondary line of feedback;

> Confirm the voltage of 1.1V on pin 4 of the IC6300. In normal operation, this pin must be approximately 1.1V. This voltage is directly related to the output voltage of 5V. If a short circuit occurs in the 5V line, the voltage on pin 4 will decrease. Case an overvoltage problem arising from a defect in the feedback line occurs, the voltage on pin 4 will increase. Even if the feedback line is open, the frequency will increase greatly.

You can work with the device's separate standby source. To do this, you must turn off the and disconnect the CN6203 connector. Power the standby source with an AC voltage and check the items described earlier. If the voltages are normal, there is a transformer secondary load problem T6300. That is, some short or consumption on the StandBy 5V line, which is connected to the A3U board.

If the PH6300 photo-coupler is experiencing problems, the IC6300 will not StandBy voltage. To isolate the photo-coupler, we must ground the resistor R6306 or short circuit pins 3 and 4 of the photocell PH6300. In doing so, the IC6300 should its working frequency to 4 KHz and the secondary voltage of the T6300 transformer

(STANDBY 5V) will be 2.8 volts.

b) TV has standby voltage 5V:

> Confirm 5V voltage through CN1003 - pin 9 (PCI B);

> Confirm the 3.3V voltage through the FL1001

> Confirm the 3.3V voltage (reset) through the IC1001 - pino92

> Confirm the XTAL1001's 16.15MHz waveform (System Clock)

> Confirm that when the TV is switched on using the POWER button, the voltage on the CN1007 - pin2 drops from 3.3V to 0V.

Power On:

> Confirm that the DC level "POWER1" is released by the IC1001 - pin7, measure JL1072

> Confirm the 2.9V DC level on the CN6203 - pin3

> Confirm the unregulated voltages of 15V, 33V, 10.5V through the CN6200 and the voltage regulated from 17.5 in CN6202. After the power supply oscillator has run voltages appear on the CN6200 and CN6202 connectors, the microprocessor releases the Power2, Power3 and Power4 signals to release regulator voltages.

Power Supply.

Confirming operation of primary power supply

> Confirm the 5V standby voltage. This step is necessary since the IC6300 must be powered with a voltage of 16.2V - VC1. This 16.2V voltage is produced from the 5V Standby Voltage;

> Confirm that there is voltage rectified after the D6000 rectifier bridge;

• Does the green LED light up when the appliance is switched on?

* If the Green LED lights up after pressing the POWER button, the microprocessor has received the drive command and is running correctly;

* If the Green LED does not light after pressing the POWER button, it indicates that there is some problem with the microprocessor

> Confirm that the signal from POWER 1 (Power ON) went to 2.9V on the connector CN6203 - pin 3;

> Confirm all voltages from the primary main power supply:

or regulated 17.5V;

or unregulated 10.5V, 15V and 17.5V.

2. Confirming operation of the secondary main power supply

> Confirm the 5V standby voltage. This step is necessary since the IC6300 must be powered with a voltage of 16.2V - VC1. This 16.2V voltage is produced from the 5V Standby Voltage.
> Confirm the existence of primary mains supply voltages:
or regulated 17.5V; the unregulated 10.5V, 15V, 17.5V and 33V.

> Check PS8501 (D5V) and PS8551 (Panel);

> Confirm the Power 2, Power 3 and Power 4 signals go high (3.2V) at the connector CN9401 - pins 41, 43 and 44;

> Confirm the output voltages: D5V, A9V, PANEL 5V.

Protections

According to item 13 of the Technical Training handbook 01/06, there are 5 protections in the chassis WAX - BRAVIA line:

1. DC ALERT 1- PANEL_5V

> Confirm via IC1001 / pin 44 (JL1055) if there is a voltage of 3.1V - DCALERT1;

a) Television has no voltage of 3.1V (Protection of DCALERT1 triggered);

> Confirm the regulated voltage of 17.5V through the CN6200 / pins1 to 5;

> Confirm the 5V voltage through the IC8552 / pin2 (A3U board)

2. DC ALERT 2 - A_9V

> Confirm via IC1001 / pin 45 (JL1054) if there is a 3.2V voltage - DCALERT2

a) Television has no voltage of 3.2V (DCALERT2 protection activated);

> Confirm the A9V power supply via the CN9405 / pin4 (A3U board);

b) If you do not have A9V power:

> Check the 9V regulator - IC8653

> Confirm regulated voltage of 10.5V via CN8601 / pin 9 or 10 (A3U board)

3. DC ALERT 3 - AU_15V

> Confirm via IC1001 / pino51 (JL1057) if there is a voltage of 3.2V - DCALERT3

a) Television has no 3.2V voltage (DCALERT3 protection on);

> Confirm via CN8601 / pins 13 or 14 if there is a voltage of 15.7V (AU15V)

> If you do not find the 15.7V voltage, check the power source, which should not be to be oscillating.

 Back Light

> Confirm via CN8603 / pin5 if there is voltage of 3.1V - BackLight;

a) Television has no voltage of 3.1V;

> Confirm via CN6203 / pin4 if there is a voltage drop of the Acc OF Det (0V) line;

b) Television has a voltage of 3.1V;

• Confirm via CN8603 / pin4 if there is a voltage of 2.3V (A3U board) – PANEL DET. If the Panel_Det signal does not exist, the LCD panel assembly may be defect;

5. Abnormal Voltage on Power Supply

• Confirm the regulated voltage of 17.5V on pin 1 of the CN1003 connector, located on the

B. If this voltage decreases (below 10V) or increases (above 23V), the microprocessor receives a sample of this voltage on pin 121 of the microprocessor and triggers protection.

6. Abnormal voltage in Speakers

• Confirm via R7813 or Q7744 collector if there is a voltage of 2.8V A3U)

a) Television does not have voltage of 2.8V;

• Confirm that there is a DC level on the audio output.

7. High Internal Temperature

There is a sensor on the B board, which monitors the internal temperature of the appliance. This sensor composed of IC1007, which communicates with the microprocessor through the Data and Clock communication (pins 1 and 2 of IC1007).

When this protection is activated, the device switches off and the LED flashes 7 times.

Sanyo LCD 15CA1Z – How to enter service mode, service adjustments, default data values, Circuit diagram

ICs used: K4S643232F; K4S643232H(SDRAM), TC6398AF(I/P converter, DS90C385MTDF(TTL/LVDS converter, TC90A92AFG(Digital Decoder with 3D YC), LA4263(Audio Amplifier), TMP88PS34N(CPU), TC90L01N(Switching), TC74VHCT04AFT

Australia/Middle East/Asia
Colour System . . . . . . . .PAL, SECAM, NTSC4.43, NTSC, PAL-60Hz
Television System . . . . .B/G, DK, K’, I, M/M
Channel Coverage . . . .VHF: E2-E12, R1-R12, K1-K9, A2-A13, J1-J12
0-11, 5A (Australia), 1-11 (New Zealand)
UHF: 21-69, A14-A69, J13-J62
28-69 (Australia)
CATV: S1-S41, X, Y, Z, Z+1, Z+2

This set has an On-screen Service Menu system included in the CPU that allows remote operation for most of the service adjustments.

Enter the Service Menu
While pressing the MENU button on the television, press the Number Key 1 on the remote control unit. 

The Service Menu now appear.

Service Adjustments:

Press the POSITION UP or POSITION DOWN button on the remote control handset to select the desired service menu item you want to adjust.
When the POSITION UP is kept pressed, ten steps of adjustment items will step up at a time.
When the POSITION DOWN is kept pressed, ten steps of adjustment items will step down at a time.
Use the VOLUME ( + or - ) or number button to adjust the data. 

The (+ or -) button will increase or decrease the data sequentially.

Exit from the Service Menu
Press the MENU button twice to turn off the Service Menu display.
The data which is set in the service mode is stored into the memory IC automatically.

White Balance Adjustment
1. Receive a White Pattern.
2. Set the television to following conditions:
Brightness: Normal
Colour: Normal
Contrast: Maximum
3. Enter the Service Menu.
Adjustment Item:
142 WBGREEN
151 WBRED
160 WBBLUE

4. Decide the fixed item which is maximum value (Example, Item 151 WBRED), select item of other 2 colours (Example, Item 142 WBGREEN or Item 160 WBBLUE) with the POSITION UP or DOWN button, and adjust a proper white balance with the VOLUME (+ or - ) button.
After adjustment, confirm white balance again by normal picture.

Note: Adjusted data is less than the fixed data.

5. Press the MENU button to turn off the Service Menu display.
The data which is set in the service mode is stored into the memory IC automatically.

Important Notice: Do not attempt to adjust service adjustments not listed on above otherwise it may cause loss of performance and for correct operation.

Default data values

CPU Port Functions

PWB 

Schematic

Click on the pictures to magnify

Schneider 20M301- how to enter service mode, Firmware update, circuit diagram, alignment procedure and more

Factory menu (Service mode menu)
Methods to enter factory menu of analogous board
1) OSD language has to be English.
2) Start from TV-mode.
3) Press “i” key.
4) Enter 6 4 0 5
5) Press 1 and 2 key, we can see service menu,
6) Press “exit” key to exit.

Methods to enter factory menu of digital board

1) Start from TV-mode.

2) Press “0”key.

3) Enter 6 4 0 5

4) Press 1,2 and 3 key, we can see service menu.

5) Press “exit” to exit the service mode.

SW Loading Procedure

Tools

Computer (with monitor) 1pcs
Data cable (Picture 001) 1pcs
Special converter (Picture 002) 1pcs
Special loading board.

Loading procedure for analogous board
1. Copy the updated software to the computer.
2. Remove tuner from LCD set.
3. Switch on LCD set, and set it in PC mode.
4. Connect LCD TV and computer with the data cable, one end with a switch to tuner port of LCD TV set the other end to the converter, which connected to the printer port of the computer.

5. Run the updated software (double click the software icon).

6. Turn on the switch on the board of the data cable.

7. Press any key on the computer keyboard, and then turn off the switch on the board of the data cable immediately.

8. Software begins to be loading. During loading, we should pay attention to the loading schedule indicator on the screen. Until about 5 lines of indication dots on the screen, the loading is complete (different software may cause different indication dots). The content of the last page of the software will appear on the screen. Then check the 4 last lines content,

they can’t all be FF.

Loading procedure for digital board
1. Remove tuner; put the loading board on the tuner’s position, and Keep the switch SW2 on the loading board on.

2. Switch LCD TV on and keep it in standby mode. The red LED on the loading board will flicker.
3. Press SW3 on the loading board. The green LED will flicker. It means the software is being loaded.
4. When the green LED stop flickering, it means loading is complete.
5. Switch LCD TV set off. Remove loading board.

After loading reset the data of E2 PROM

1. Set language to English.
2. Press keys of "i ”, “6,4,0,5," to enter the Factory menu of Analog board.
3. Select item of "e2prom ID reset" and press "-->" key to set the status of "off" to "on".
4. Press "0" key to set the "e2prom reset" active until the status "on" turn to "off".
5. Quit the factory menu.
6. Press "i" to enter "user menu" and select "Reset" item by "up/down keys"
7. Press "-->" key two times to act the "reset" until a indicated "reset …ok"
8. Quit the analog user menu
9. Press keys of "0, 6,4,0,5," and "1" to enter the "e2prom reset sub- Factory menu" of Digital board.
10. Select item of "RST" and press "-->" key to act the "reset" on and an OSD of "waiting…" appears.
11. Set will turn off automatically when finish of resetting.

After loading we may need to adjust the set again according to alignment procedure

Alignment procedure

AGC adjusting
1) Power on the set and connect a TV signal to the tuner.
Request of the TV signal as below:
F=48.25MHZ
System: PAL B/G
Pattern: color bar
Intensity: 65 db
2) Press “i” key of remote control, th en press 6, 4, 0, 5 to enter factory menu, set AGC value to 14, and
check the noise of screen is just at minimum.
Alignment of white balance
1) Adjustment of white balance in VGA mode.
1.1 Connect VGA signal, 1024x768 60hz, and white field, to LCD TV set.
1.2 Set the values of brightness to 50%, and contrast to 70%.
1.3 Using a color analyzer to test the color coordinates.
1.4 Press 0,6,4,0,5 key in RC to enter factory mode, adjust the value of R, G and B to get x=284 15 and y=299 15.
1.5 Press exit key to exit.

2) Adjustment of white balance in TV mode.

2.1 Connect TV signal, PAL/BG system, and white field, to LCD TV set.

2.2 Set the values of brightness to 50%, and contrast to 70%.

2.3 Using a color analyzer to test the color coordinates.

2.4 Press 0,6,4,0,5 key in RC to enter factory mode, adjust the value of R, G and B to get x=284 15 and y=299 15.

2.5 Press exit key to exit.

Alignment of mid-brightness

1) Power on the set and connect a TV signal, 8 degrees gray signal, to the tuner.

2) Set the value of brightness to 50%, contrast to 70%. (Actually, it is the condition after reset)

3) Press “i” key of remote control, then press 6, 4, 0, 5 to enter factory menu. Then change the value of mid.brightness to make the 2 darkest bars can be identified, and the 2 brightest bars can be identified too. It means we get a perfect picture on the screen.

Note 1, we are finding a more perfect method to adjust white balance and sub-brightness. If we just adjust mid.brightness to get proper sub- brightness. The value of mid.brightness may be very low or

very high. With too low or too high value of mid-brightness, we may get a poor control curve of brightness.

Schematic

Philips 715G6163 SMPS schematic (Circuit diagram)

Used with:  Philips 40PFL4609 – Philips 40PFL3088H, Philips 47PFH5209, Philips 47PFH4109/88, Philips PLTVDS511XAG6,  Vizio E90B1 LED-LCD TV, Vizio D32HN-E1 32 inch LED LCD TV, Vizio 550 inch LED LCD smart TV1080p E50C1 and many other brand LED LCD TVs.

Used ICs - LD7591T, TK15A60U(FET), SSC1S311, PF7903BS, AO4486, STF24NM65N(FET), AOTF4126(FET)

Schematic [Click on the schematics to magnify]

PWB: Component and foil side

Philco PH43M – 3D Smart LED TV – Power board schematic

Philco PH43M LED Smart 3D TV schematic

Used ICs: FSFR1700XS, TLP781, VIPER17L, FAN7930C, K12A50D(FET), 

Schematic [Click on the schematics to magnify]

Fostex Digital Multitracker MR16HD, MR16HD/CD – How to enter the service mode – software update and adjustments

SOFTWARE UPDATE

1) Connect the AC power cable to the AC IN connector.
2) Press the MR16 power switch.
3) Press the [MENU/ENTER] dial to enter the MENU mode.
4) Rotate the [MENU/ENTER] dial and select the “USB” menu.
5) Press the [MENU/ENTER] dial.
6) Rotate the [MENU/ENTER] dial and select the “Disk Protect” menu.
7) Press the [MENU/ENTER] dial and set “Disk Protect” to “Off” by
rotating the [MENU/ENTER] dial. Then, press the [MENU/ENTER] dial. With this setting, the Disk Protect mode is turned off indicating the condition that the software update file can be copied to the MR16 internal HDD.
8) Rotate the [MENU/ENTER] dial to select the “< < Back” menu and press the [MENU/ENTER] dial.

9) Rotate the [MENU/ENTER] dial and select the “USB Device Mode” menu.
10) Press the [MENU/ENTER] dial. If MR16 is correctly put into the USB mode, the display on the right will appear on the LCD. Now MR16 is ready to connect to PC or Macintosh.
11) Connect the USB cable from the MR16 USB port to PC on which Windows XP/2000 is running or Macintosh on which OS X is running.

CAUTION: MR16 can be connected to PC on which Windows XP/2000 is running or Macintosh on which OS X is running for software update as well as audio data transfer. Of course PC/Macintosh has to be equipped with a USB port.

12) PC or Macintosh recognizes MR16 as an external removable disk.

(a) Windows XP/2000
The example below indicates that MR16 is recognized as a removable disk (E) in the My Computer on Windows XP PC. Unzip the software update file with “zip” extension (e.g. MR16_V102.zip) normally sent together with a technical bulletin. If you do so, a software update file (e.g. MR16V102.MOT) will be created. Place a newly created software update file with “MOT” (motorola format) extension in the root directory tree of the Removable disk (E).

By double-clicking the removable drive (E) (MR16), the window on the right will appear. You can see that the software update file (MR16V102.MOT) is placed in the top directory tree of the Removable Disk (E).

After transferring the software update file is completed, do not tun off the USB connection by pressing the MR16 STOP key. First, you need to safely remove the MR16 from PC side by opening the “Safety Removable Hardware” in the tool bar and pressing the “Stop” button on Windows XP/2000 PC. Then, you can turn off the USB connection from the MR16 side

Macintosh OS X
MR16 is recognized as
“MR16” on the Macintosh
OS X desktop. By doubleclicking the MR16 icon, the window on the right will appear. There are five song folders and one software update file “MR16V101.MOT”

Unzip the software update file with “zip” extension (e.g. MR16_V102.zip).

Copy and paste a newly created software file with “MOT” (motorola format) extension (e.g. MR16V102.MOT) onto a root directory of MR16 HDD connected to Macintosh (OS X).

After transferring the software update file is completed, do not tun off the USB connection by pressing the MR16 STOP key. You need to press the EJECT button on Macintosh. Then, you can turn off the USB connection from the MR16 side.

CAUTION: There is a case that it takes time for PC or Macintosh to recognize MR16 as an external device. While the “ACC” (access) indication on the upper right of the MR16 LCD is flashing in the USB mode, do not disconnect the USB cable between MR16 and PC / Macintosh.

13) Disconnect the USB cable between MR16 and PC / Macintosh.

14) On MR16 with the normal display appears, press the [MENU/ENTER] dial while holding down the [STOP] key to access the Service Mode menu.

NOTE: Pressing the [MENU/ENTER] dial while holding down the [STOP] key allows to access the "Version" and "Version Up" Service menu only. To fully access all the Service menus, as mentioned below., press the [MENU/ENTER] dial while holding down the [STOP] and [POWER] keys.

15) Rotate the [MENU/ENTER] dial and select the “Service Mode” menu.

16) Press the [MENU/ENTER] dial.

17) Rotate the [MENU/ENTER] dial and select the “Version Up” menu.

18) Press the [MENU/ENTER] dial.

19) Rotate the [MENU/ENTER] dial and select a software update file with the version number you would like to update.

NOTE: As long as the file name is different, up to five software update files can be placed in the root directory.

20) Press the [MENU/ENTER] dial.

21) The selected software file is displayed together with the software version number. To go on, press the [MENU/ENTER] dial while holding down the [REC] key.

22) The software updating procedures begin. “File loading...”, “Flash ROM Erasing...” and “Flash ROM Writing...” will appear in order.
It will take about one minute to complete the procedures.

23) Upon completion, “Completed” will appear on the LCD.

24) Turn off the power once and then back on to complete the software update procedures. In the meantime, confirm the software version number and the programming date displayed for a short instance in the boot-up process.

The software version can be checked by the “Version” Service Mode menu. In the condition with normal display appears, press the [MENU/ENTER] dial while holding down the [STOP] key to access the Service Mode menu. If you do so, the display on the right will appear on the LCD. Rotate the [MENU/ENTER] dial to select the “Service Mode” menu and press the [MENU/ENTER] dial.

Select the “Version” menu and press the [MENU/ENTER] dial.

The display on the right will appear on the LCD. It indicates that the programming date is February 5th, 2007, the version number is V1.02 and the CPU revision number is E2. To get back to the normal display, press the [STOP] key.

25) Press the [STOP] key to return to the normal display mode. Then, press the [MENU/ENTER] dial to enter the MENU mode.
26) Rotate the [MENU/ENTER] dial to select the "System" menu and press the [MENU/ENTER] dial.
27) Rotate the [MENU/ENTER] dial and select the “Init Memory” menu.

28) Press the [MENU/ENTER] dial.
29) The display contents on the right appear on the LCD. Press the [MENU/ENTER] dial while holding down the [RECORD] key. This operation will initialize all the system settings to default.

CAUTION: The “Initialize Memory” operation sets all the system settings to the default values. For example, the “Disk Protect” setting in the USB menu is set to “ON” after initializing the memory. If you would like to update the software in future, please remember that it has to be set to “OFF” again.

SERVICE MENU

In addition to various MENU modes, SERVICE menus are available to check and maintain the MR16 condition. 

Utilize them when servicing MR16.

Entering Service Menu

1) Connect the AC cable and power on MR16. After the bootup procedure is completed, the display on the right will appear on the MR16 LCD

2) Press the [MENU/ENTER] dial while holding down the [STOP] and [POWER] keys. If you do so, "Service Mode" is displayed on the MR16 LCD.

CAUTION: If the [POWER] key is held down for more than three seconds, MR16 turns off. Please be careful to expedite the above manipulation 2).

3) Rotate the [MENU/ENTER] dial and select “Service Mode”. Then, press the [MENU/ENTER] dial. You can see that the following service menus will appear on the MR16 LCD

Select one of the service menus you would like to execute and press the [MENU/ENTER] dial.

Version
In the “Version” service menu, the current MR16 software version as well as the corresponding software programming date can be checked.
1) After selecting the “Version” menu, press the [MENU/ENTER] dial to check the current software version and the programming date. Indicates that the software version is “V1.02” the programming date is February 5th, 2007 and the CPU revision number is E2.
By pressing the STOP key, MR16 returns to the service menu select condition.

Version Up
The “Version Up” service menu allows you to update the MR16 software by placing the software update file in the root directory tree of the MR16 3.5” internal hard disk. For the update procedures, refer to the  SOFTWARE UPDATE”

Advanced Format
MR16 checks the remaining capacity / partition information written on the internal HD in the bootup process after powering on. In case this information does not match the current HD condition, the “Advanced Format” service menu can be used. For example, even if no song has been created (recorded) but the remaining capacity indicates only 10MB, execute the “Advanced Format” menu.
Remember that executing the “Advanced Format” deletes all the songs recorded on the internal HD.

Upon completion of “Advanced Format”, the message “Boot Sector Clear” appears on the LCD.
NOTE: In case MR16 is not booted up correctly and displays an alert message such as “Please Wait!” permanently, power if off once.
Then, while holding down the [STOP] key, power on MR16.
This mode allows to boot up without loading any recorded songs.
Next, execute the “Advanced Format” menu.

CD-RW Disk Erase
Executing the “Disk Erase” service menu erases all existing song data on the CD-RW disk put into the MR16HD/CD internal CD-R/RW drive.
1) Rotate the [MENU/ENTER] dial and select “CD-RW”. Then, press the [MENU/ENTER] dial.
2) Rotate the [MENU/ENTER] dial and select “Disk Erase”. Then, press the [MENU/ENTER] dial.

3) To go on, press the [MENU/ENTER] dial while holding down the [REC] key.
4) The CD-RW disk erasing procedures begin. “Erasing...” will appear .
It will take about one minute to complete the procedures.

5) Upon completion, “Completed!” will appear on the LCD.

Display Test
This menu checks if the EFFECT SEND / PAN / REVERB/DELAY pots & faders / self-illuminating tact switches are working properly.
1) After selecting the “Display Test” menu, press the [MENU/ENTER] dial.
2) Press the [MENU/ENTER] dial again. If you do so, the display on the right will appear on the MR16 LCD.
As shown in the drawing below, each value the EFFECT SEND / PAN / TO STEREO BUSS LEVEL / REVERB/DELAY pots & faders position. Rotate the EFFECT SEND / PAN pots and move the faders to check if the value changes from "0" to "F" in hexadecimal depending on the pots / fades position as follow.

EFFECT SEND Pots 1 ~ 8:	0 (CCW) ~ F (CW)
PAN pots 1 ~ 8:	0 (CCW) ~ F (CW)
TO STEREO BUSS LEVEL pot:	0 (CCW) ~ F (CW)
REVERB/DELAY pot:	0 (CCW) ~ F (CW)
Channel faders (1 ~ 8, 9/10, 11/12, 13/14, 15/16):	0 (down) ~ F (up)
Master fader:	0 (down) ~ F (up)

3) After checking, press the [MENU/ENTER] dial to proceed the next Display Test. The next test is to check if the self-illuminating tact switches are lit in red.
Check if the self-illuminating tact switches are properly lit in red.

4) After checking, press the [MENU/ENTER] dial to proceed the next Display Test. The next test is to check if the self-illuminating tact switches are lit in green.
Check if the self-illuminating tact switches are properly lit in green.

5) After checking, press the [MENU/ENTER] dial to proceed the next Display Test. The next test is to check if the self-illuminating tact switches are lit in umber.
Check if the self-illuminating tact switches are properly lit in orange.

6) After checking, press the [MENU/ENTER] dial to proceed the next Display Test. The next test is to check if the tact switches on the MR16 top panel except the POWER SW is in good contact. If the tact switch is pressed, the corresponding asterisk mark on the MR16 LCD will go out. If not, the tact switch might be worn out and be replaced.
After all the tact switches are confirmed to be in good contact, the display on the right will appear on the MR16 LCD.

Bus Check
This menu checks if various bus signals connected to the CPU are correctly working or not.
1) After selecting the “Bus Check” menu, connect the foot SW to the foot SW jack and the USB cable between the USB and USB HOST ports.
2) Press the [MENU/ENTER] dial to initiate the Bus Check mode.

 AUDIO BUS
The AUDIO BUS setting is fixed at “THRU” in this menu. In the
“THRU” setting, the A/D and D/A converters are internally connected. Also the CHAN A/C and B/D PAN setting are set to left and right respectively. Thus, the signals fed to CHAN A and C are summed and output from the STEREO OUT L and the signal fed to CHAN B and D are summed and output from the STEREO OUT R.
This mode is convenient when checking the input circuit.
ATA BUS
The “OK” sign indicates that the ATA bus communication between the internal HD and the CPU is properly made. If the “NG” sign appears, something must be wrong with the ATA bus communication.
INPUT SEL
The “INPUT SEL” indicates the number corresponding to the INPUT A SELECT switch setting as follow.
GTR CLEAR: 2
GTR DISTORTION: 1
MIC/LINE: 3
 FOOT SW
When an unlatched type foot switch is connected and it is pressed, the “ON” indication will appear. If the foot switch is released or is not connected, the “OFF” sign will appear.
 USB BUS
If the “USB BUS” section indicates the “OK” sign 3 ~ 5 seconds after the “WAIT..” sign is displayed, the USB HOST function works properly. If the “NG” sign is displayed, press the [MENU/ENTER]
dial and then try to enter the Bus Check mode again by pressing the [MENU/ENTER] dial.
 ATAPI BUS
The “OK” sign indicates that the ATAPI bus communication between the CD-R/RW drive and the CPU is properly made. If the “NG” sign appears, something must be wrong with the ATAPI bus communication.

Harman kardon AVR 2550 - Schematic - full

Used ICs and Transistors: TC9215AF, NJM2068M, M45556A, LC755725E, MB90F-476APFQ

Power output transistors: 2SD2390/ 2SB1568 pair

Audio Section

Stereo Mode: Continuous Average Power (FTC)
50 Watts per channel, 20Hz–20kHz, @ < 0.07% THD, both channels driven into 8 ohms
Five-Channel Surround Modes
Power Per Individual Channel
Front L&R channels
40 Watts per channel, @ < 0.07% THD, 20Hz–20kHz into 8 ohms
Center channel:
40 Watts, @ < 0.07% THD, 20Hz–20kHz into 8 ohms
Surround channels
40 Watts per channel, @ < 0.07% THD, 20Hz–20kHz into 8 ohms
Input Sensitivity/Impedance
Linear (High Level) 200mV/47kohms
Signal-to-Noise Ratio (IHF-A) 95dB
Surround System Adjacent Channel Separation
Analog Decoding 40dB
 (Pro Logic, etc.)
Dolby Digital (AC-3) 55dB
DTS 55dB
Frequency Response
@ 1W (+0dB, –3dB) 10Hz–100kHz
High Instantaneous Current Capability (HCC) ±25 Amps
Transient Inter-modulation
Distortion (TIM) Unmeasurable
Rise Time 16 µsec
Slew Rate 40V/µsec

Schematic [Click on the schematics to zoom in]

HBUSTER LED TV HBTV32D01 – HBTV42D01 – How to enter service mode, firmware update, Power and main board connector details

Service mode
For the TV remote control, enter the following keys in sequence: Menu >8>8>9>3
The TV screen will display the information.
In the last line of the service menu, the card version can be noted. Such as:
“L_MSD209GL_PANEL_MERGE BRA MAY 13 201016.47.31”
Simply press the EXIT button on the user's remote control or turn the power off, to Exit the service mode. 

ATTENTION: When performing a software update, memory swapping
If the EEPROM or the device shows unstable, perform the below:
Press the UP / DOWN buttons and select Init EEPROM, then press the ">" button.
 It will take some seconds for execution.

NOTE: After "reset", turn the unit Off and On again.

Firmware Update

This procedure should only be performed when the equipment is abnormal in its operation, or when there is an official communiqué to carry out such a procedure.

Do not upgrade if the equipment is working properly.

Carefully read the entire procedure and perform the task as described below.

If in doubt, always seek the help of H-Buster technical support.

[NEVER DO THIS PROCEDURE IF THE ELECTRICAL NETWORK IS UNSTABLE, UNDER RISK OF IRREVERSIBLE DAMAGE TO THE MEMORY OR EVEN THE MAIN BOARD. ]

Initial Procedures

Needed tools

An empty and formatted pen drive (FAT32) - minimum 512MB.

- Remote control handset. 

- Latest version downloaded from the services website.

To obtain the latest version, log on to the H-Buster service website and download as the LCD panel model (if present). If you have any questions, please contact technical support.

How to identify the Panel Type.

Can be noted by the service menu screen or from the silk screen at the back of the LCD panel

Updating the firmware

Follow the procedures below carefully:

1) With the TV working, connect the pen drive with the recorded program to the USB port.

2) Press the MENU button on the remote control and go to the CHANNEL option with the navigation keys and press OK.

3) In the CHANNEL menu, scroll to the next page where "Update Software" will appear and press OK.

4) The confirmation question will appear on the screen, confirm and press OK.

5) Wait until the end of the update, where the equipment will turn off and restart itself.

6) Enter the service menu and reset the memory with the INIT EEPROM command.

HBTV42D01FD – SMPS schematic. Used ICS: ICE3B0565, L6599, SPW20N60C3(FET)

HBTV 42D01FD power board connector voltages

HBTV 32D01HD – HBTV 42D01FD MAIN BOARD connector details

HBTV 32D01HD Power board connector voltages

Click on the pictures to magnify