Thursday, 10 December 2020

Sony HCD-GRX20, HCDRXD3 service mode, adjustments and schematic - MINI Hi-Fi COMPONENT SYSTEM

 

Continuous RMS power output (Reference) 50 W + 50 W (6 Ω at 1 kHz, 10% THD)

HCD-GRX20-RXD3 is the tuner, deck, CD and amplifier section in MHC-GRX20-RXD3.

CD Mechanism Type:  CX3

Base Unit Type:  KSM-213ECM

Optical Pick-up Type:  KSS-213ECM-C2NP

Tape Transport Mechanism Type:  CWL-44-FR

Continuous RMS power output (Reference):  50 W + 50 W (6 Ω at 1 kHz, 10% THD

AM tuner section

Tuning range:   531 – 1,602 kHz (with AM tuning interval set at 9 kHz) 530 – 1,710 kHz (with AM tuning interval set at 10 kHz)

Antenna:   AM loop antenna

Antenna terminals:   External antenna terminal

Intermediate frequency:   450 kHz

TEST MODE

Initialization

STOP + POWER OFF All preset data is re-set to the initial (default) value.

Model display

STOP + DISC 1 Mode name is displayed.

Destination display

STOP + DISC 2 Destination is displayed.

Version display

STOP + DISC 3 Version number of the microprocessor is displayed.

CD aging mode

STOP + DISC SKIP/EX-CHANGE Set discs to DISC 1 and DISC 3. The following operations are repeated when aging starts:

1. DISC 1: TOC Read

2. Plays back the last music of the DISC 1.

3. DISC 3 : TOC Read

4. Plays back the last music of the DISC 3.

5. STOP

6. Tray is open and closed.

TAPE aging mode

STOP + PLAY A Insert a commercially available cassette tape (10 min) to the decks A and B. When aging starts, each tape is rewound and the following operations are repeated:

1. TAPE A: FWD PLAY for one minute

2. TAPE A: FWD STOP for one second

3. TAPE A: FWD PLAY for three minutes

4. TAPE A: FWD FF to tape end

5. TAPE B: FWD PLAY for one minute

6. TAPE B: FWD REC PAUSE for one second

7. TAPE B: FWD REC for three minutes

8. TAPE B: FWD FF to tape end

9. TAPE B: REV PLAY for one minute

10. TAPE B: REV REC PAUSE for one second

11. TAPE B: REV REC for three minutes

12. TAPE B: REV FF to tape end.

CD service mode

STOP + OPEN/CLOSE The message “CD S - -” is displayed on the screen. The sled is moved to the outer circumference while the FF button is pressed. Also, the SLED is moved to the inner circumference while the REW button is pressed. After pressing the PLAY button, FOCUS is turned ON, CLV-S is set, TRACKING and SLED servos are turned OFF and ADDRESS 3 = 3F, 37 is set.

Display

STOP + DBFB All displays are turned ON.

Balance adjustment value

STOP + DISPLAY/DEMO The balance adjustment value is displayed.

Key check

STOP + FILE SELECT Function of the pressed key is displayed.

MECHANICAL ADJUSTMENTS

1. Clean the following parts with a denatured alcohol-moistened swab:

Record-playback head,  pinch rollers, erase head rubber belts, capstan idlers.

2. Demagnetize the record/playback head with a head demagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.

4. After the adjustments, apply suitable locking compound to the parts adjusted.

5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

Torque Measurement

ELECTRICAL ADJUSTMENTS

DECK SECTION:  0 dB=0.775V

1. Demagnetize the record/playback head with a head demagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.

3. After the adjustments, apply suitable locking compound to the parts adjusted.

4. The adjustments should be performed with the rated power supply voltage unless otherwise noted.

5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.)

6. The adjustments should be performed for both L-CH and RCH.

Record/Playback Head Azimuth Adjustment (Deck A, Deck B)

[Perform these adjustments for both decks.]





AM Tuning Voltage Adjustment

1. Set the reception frequency of the unit to 530 kHz.

2. Adjust L105 for 1.2 ± 0.05 V reading on the DC voltmeter.

3. Set the reception frequency of the unit to 1,710 kHz.

4. Confirm that the voltage reading on the DC voltmeter is within 8.0 ± 0.5 V.

Adjustment Location: MAIN board.

AM Tracking Adjustment.

1. Tune the set to 600 kHz.

2. Set the output of AM RF SSG so that the input level of the set will become 60 dB (µV/m).

3. Adjust L104 so that when the waveform on the oscilloscope is maximum, no noise appears.

4. Tune the set to 1,400 kHz.

5. Adjust TC102 so that when the waveform on the oscilloscope is maximum, no noise appears.

Repeat the procedures in each adjustment several times, and the tracking adjustment should be finally done by the trimmer capacitors.

Adjustment Location: MAIN board.

FM Tuned Level Adjustment

1. Supply a 28 dB 98 MHz signal from the ANTENNA terminal.

2. Tune the set to 98 MHz.

3. Adjust SFR101 to the point (moment) when the TUNED indicator will change from going off to going on.

Adjustment Location: MAIN board

CD SECTION

1. CD Block is basically constructed to operate without adjustment. Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks.

5. Adjust the focus bias adjustment when optical block is replaced.

1. Connect oscilloscope to test point TP (RF) on CD DECODER board.

2. Turned Power switch on.

3. Put disc (YEDS-18) in and playback.

4. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.

Note: Clear RF signal waveform means that the shape “◊” can be clearly distinguished at the center of the waveform.

Circuit diagrams




Tuesday, 8 December 2020

Sony DVD RECEIVER HBD-DZ330-DZ710-DZ730-service mode, adjustments, power board schematic

 

HBD-DZ330-DZ710-DZ730 are the amplifier, DVD-CD and tuner section in DAV-DZ330-DZ710-DZ730.

Model Name Using Similar Mechanism: 

HBD-DZ170-DZ171-DZ175-DZ310-DZ510-DZ610-DZ810.

Mechanism Type:  CDM85MB-DVBU102.

Optical Pick-up Name:  KHM-313CAA.

Amplifier Section power output:  Front L + Front: 108 W + 108 W (at 3 ohms, 1 kHz, 1% THD)

Self-diagnosis Function.

(When letters-numbers appear in the display)

When the self-diagnosis function is activated to prevent the system from malfunctioning, a 5-character service number (e.g., C 13 50) with combination of a letter and 4 digits appears on the TV screen or front panel display. In this case, check the following table.



When the version number appears on the TV screen.

When you turn on the system, the version number [VER.X.XX] (X is a number) may appear on the TV screen. Although this is not a malfunction and for Sony service use only, normal system operation will not be possible.  Turn off the system, and then turn on the system again to operate.

How to open the disc table when power switch turns off Insert a tapering driver into the aperture of the unit bottom, and slide it in the direction of the arrow.

Insert a screwdriver from between the front panel and the chassis and slide the rod in the direction of the arrow.

Precaution when installing a new OP unit-Precaution before unsoldering the static electricity prevention solder bridge.

When installing a new OP unit, be sure to connect the flexible printed circuit board first of all before removing the static electricity prevention solder bridge by unsoldering.  Remove the static electricity prevention solder bridge by unsoldering after the flexible printed circuit board has already been connected.

(Do not remove nor unsolder the solder bridge as long as the OP unit is kept standalone.)


NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

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.

NOTES ON LASER DIODE EMISSION CHECK

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.

LASER DIODE AND FOCUS SEARCH

1. Open the case and turn POWER on with no disc inserted.

2. Confirm that the following operation is performed while observing the objecting lens from the clearance of DVD mechanism deck.

1) Confirm that laser beam is spread.

2) Up and down motion of the objective lens. (2 times)

DISC TRAY LOCK

The disc tray lock function for the antitheft of an demonstration disc in the store is equipped.

1. Press the POWER button to turn the set on.

2. Press the [FUNCTION] button to set DVD/CD function.

3. Insert a disc.

4. Press the [STOP] button and the [EJECT] button simultaneously for five seconds.

5. The message “LOCKED” is displayed and the tray is locked.

Releasing Procedure:

1. Press the [STOP] button and the [EJECT] button simultaneously for five seconds again.

2. The message “UNLOCKED” is displayed and the tray is unlocked.

Note: When “LOCKED” is displayed, the tray lock is not released by turning power on/off with the [POWER] button.

IMPORTANT NOTICE

Caution: This system is capable of holding a still video image or onscreen display image on your television screen indefinitely. If you leave the still video image or on-screen display image displayed on your TV for an extended period of time you risk permanent damage to your television screen.  Projection televisions are especially susceptible to this.

Discharge the charged electricity in capacitors to prevent electric shock as follows

When disassembling the machine, be sure to discharge the charged electricity in the following capacitors. Use a resistor of 800 ohms, 2 Watts for discharging the following capacitors.



TEST MODE

Note: Incorrect operations may be performed if the test mode is not entered properly.  In this case, press the [POWER] button to turn the power off, and retry to enter the test mode.

1. 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 customers.

1. Press the [POWER] button to turn the power on.

2. Press three buttons [PLAY], [FUNCTION] and [POWER] simultaneously.

3. When this button is operated, display as “COLD RESET” for a while and all of the settings are reset.

2. Panel Test Mode

• This mode is used to check the software version, FL and KEY.

Display Test Mode

1. Press the [POWER] button to turn the power on.

2. While pressing the [STOP] and the [PLAY] buttons simultaneously, turn the [VOLUME] control in the direction of (+).

3. When the display test mode is activated, all segments are turned on. When the mode in, “REC TO USB” is turn off.

4. To exit from this mode, while pressing the [STOP] and the [PLAY] buttons simultaneously, turn the [VOLUME] control in the direction of (+).

Version Test Mode

1. When the display test mode is activated, press the [FUNCTION] button and the message “DSZ2E” (DZ330), “DSZ6KD” (DZ710), “DSZ5E” (DZ730) are displayed, the version test mode is activated.

2. Whenever the [FUNCTION] button is pressed, the display changes in the following order.


3. Press the [REC TO USB] button when the MC version is on display. The date of software production is displayed.

4. Press the [REC TO USB] button again and the version is displayed.

5. To exit from this mode, while pressing the [STOP] and the [PLAY] buttons simultaneously, turn the [VOLUME] control in the direction of (+).

FL Pattern Test Mode

1. When the display test mode is activated, press the [EJECT] button, to select the FL pattern test mode. When the FL pattern test mode, half segments of FL display and “REC TO USB” are turn on.

2. Press the [EJECT] button, half segments of FL display and “REC TO USB” are turn off.

3. Next press the [EJECT] button, all segments of FL display is turn on.

4. To exit from this mode, while pressing the [STOP] and the [PLAY] buttons simultaneously, turn the [VOLUME] control in the direction of (+).

Key Test Mode

1. When the display test mode is activated, press the [?/1] button, to select the key test mode.

2. To enter the KEY test mode, the fluorescent indicator displays “K0 V0”. Each time an another button is pressed, “KEY” value increases. However, once a button is pressed, it is no longer taken into account. When all keys are pressed correctly, “K6 V0” is displayed.

3. When the [VOLUME] control is turned in the direction of (+), “V0” is changed to “V1”, then ... “V9”. When the [VOLUME] control is turned in the direction of (–), “V0” is changed to “V9”, then ... “V1”.

4. To exit from this mode, while pressing the [STOP] and the [PLAY] buttons simultaneously, turn the [VOLUME] control in the direction of (+).

DVD Version Display

• The STR and DVD microprocessor versions are displayed.

1. Press the [POWER] button to turn the set on.

2. Press the [PLAY] button and the [POWER] button simultaneously for three seconds. SC version display is presented.

3. Pressing the [FUNCTION] button presents a DV version display. Pressing the [FUNCTION] button again returns to the SC version display.

4. To exit from this mode, press any button other than the [FUNCTION] button.

Product Out

• This mode moves the optical pick-up to the position durable to vibration and clears all data including preset data stored in the STR RAM to initial conditions. Use this mode when returning the set to the customer after repair.

1. Press the [POWER] button to turn the power on.

2. Press the [FUNCTION] button to set the function “DVD/CD”.

3. Remove all discs.

4. While pressing the [STOP] and the [EJECT] buttons simultaneously, turn the [VOLUME] control in the direction of (+).

5. Displayed to message “SERVICE IN” on the fluorescent indicator tube when pressing in turn the [4]  >  [DVD MENU]  >  [CLEAR] buttons on the remote commander.

6. After the “STANDBY” blinking display finishes, the message “MECHA LOCK”  ó “UNPLUG” is displayed on the fluorescent indicator tube disconnect the AC power plug, then the product out mode is set.

The STR RAM initialization is executed upon a next power-on after the power is turned off.

Power board schematic



D.C.A.C. (AUTOMATIC ACOUSTIC FIELD CALIBRATION) TEST MODE

1. Press the [POWER] button to turn the power on.

2. Press the [FUNCTION] button to set the function “ DVD-CD”.

3. Insert Calibration mic (ECM-AC2) supplied as an accessory into the A.CAL MIC jack.

4. Press three buttons [x], [Z] and [REC TO USB] simultaneously.

5. Confirm that the following are shown on the display panel.

The JACK inserted/non-inserted detection display and the display.

1 MIC detection condition

NON : Not detected

IN : Detected

2 Presence of DIGITAL sound data input to the microprocessor

NG: Input absent

OK: Input present

3 AD value (255h) of MIC input to the microprocessor.


6. To exit from this mode, press three buttons [POWER], [EJECT] and [REC TO USB] simultaneously.

7. PROTECTION FACTOR (SD DETECTION-DC DETECTION-TSD DETECTION) IDENTIFICATION TEST MODE

When an error is detected, the FL tube alternately displays

“PROTECTOR< -> PUSH POWER”.

 Press the [POWER] button.

* Buttons other than the [POWER] button are invalid.

“STANDBY” blinks three times on the FL tube.

The protection release state (POWER OFF) is established.

(No FL tube display)

 Press the [POWER] button two times.

The power to the system turns on, and the normal operation is established. (Restore).

During the protection state:

1. If the AC plug is connected or disconnected during the protection state, the protection state is released, and the normal operation is established. (The protection state is not maintained.)

2. The protection factor is displayed by pressing the [RETURN] > [3] > [2] > [0] > [0] > [ANGLE] buttons of the remote commander.

(During the “PROTECTOR” > “PUSH POWER” display).

 When SD is detected: Repeats

“SD DETECT” > “PROTECTOR”.

 When DC is detected: Repeats

“DC DETECT”  > “PROTECTOR”.

 When TSD is detected: Repeats

“TMP DETECT” > “PROTECTOR”.

PL: SD detection

When the “L” output from the SD (shutdown) port on the S-MASTER POWER Driver Shutdown and voltage descent (15V or less) of 30V power supply (PVDD) are detected.

DC detection

When the “L” output from the power/speaker error detection circuit (DC detection port) is detected for two seconds continually, the power system other than that of the FL tube is turned off, and the protection state is established.

TSD detection

When the “L” output from the thermal shutdown port (TSDM) on the motor driver is detected.


Sunday, 6 December 2020

Philips 32 and 43 inch LCD TV – 5813 – 5833 series - how to enter the service mode, adjustments, power board schematic and error codes

 

Philips 32PHD5813-55, 32PHG5813-78, 32PHG5813-77, 32PHG5833-77, 43PFG5813-78, 43PFG5813-77, 43PFD5813-55, 43PFT5813-57, 43PFG5813/78-AUO  - TPM18.7L LA chassis, MTK5800 platform

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 TV set, it is best to test the high voltage insulation. It is easy to do, and is a good service precaution.

PAL, NTSC, SECAM: Mains power: AC 110-240V +/-10%

BOM identification

It should be noted that on the European Service website, “Alternative BOM” is referred to as “Design variant”.

The third digit in the serial number (example: AG2B0335000001) indicates the number of the alternative B.O.M. (Bill Of Materials) that has been used for producing the specific TV set. In general, it is possible that the same TV model on the market is produced with e.g. two different types of displays, coming from two different suppliers. This will then result in sets which have the same CTN (Commercial Type Number; e.g. 28PW9515/12) but which have a different B.O.M. number.

By looking at the third digit of the serial number, one can identify which B.O.M. is used for the TV set he is working with. If the third digit of the serial number contains the number “1” (example: AG1B033500001), then the TV set has been manufactured according to B.O.M. number 1. If the third digit is a “2” (example: AG2B0335000001), then the set has been produced according to B.O.M. no. 2. This is important for ordering the correct spare parts.

For the third digit, the numbers 1...9 and the characters A...Z can be used, so in total: 9 plus 26= 35 different B.O.M.s can be indicated by the third digit of the serial number.

Identification: The bottom line of a type plate gives a 14-digit serial number. Digits 1 and 2 refer to the production center (e.g. SN is Lysomice, RJ is Kobierzyce), digit 3 refers to the B.O.M. code, digit 4 refers to the Service version change code, digits 5 and 6 refer to the production year, and digits 7 and 8 refer to production week (in example below it is 2010 week 10 / 2010 week 17). The 6 last digits contain the serial number.



Board Level Repair (BLR) or Component Level Repair (CLR)

If a board is defective, consult your repair procedure to decide if the board has to be exchanged or if it should be repaired on component level.

If your repair procedure 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.


Small Signal Board (SSB) removal

Caution: it is mandatory to remount all different screws at their original position during re-assembly. Failure to do so may result in damaging the SSB.

Release the clips from the LVDS connector that connect with the SSB[1].

Caution: be careful, as these are very fragile connectors!

2. Unplug connector [2] .

3. Remove all the fixation screws from the SSB [3].

4. The SSB can now be shifted from side connector cover, then lifted and taken out of the I/O bracket.


Service Alignment Mode (SAM)

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 “INFO/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 once while in top level SAM, the set will switch to the normal user menu (with the SAM mode still active in the background).

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.

Remark: Under main menu “NVM editor”, choose “Service Data”, you can use the UP/DOWN keys to view and change the set Type number, the set Production Number or the 18AC of a part.(The NVM-editor still has the same function as before, alpha-numeric entry

How to Activate the Factory mode

To activate the Factory mode, use the following method:

Press the following key sequence on the remote control transmitter: from the “menu/home” press “1999”, directly followed by the “Back/Return” button. Do not allow the display to time out between entries while keying the sequence.

After entering the Factory mode, we can see many items displayed, use the UP/DOWN keys to display the next/previous menu items

How to Exit the Factory mode

Use one of the following methods:

Select EXIT-FACTORY from the menu and press the “OK” button.

Note: When the TV is switched “off” by a power interrupt, or normal switch to “stand-by” while in the factory mode, the TV will show up in “normal operation mode” as soon as the power is supplied again. The error buffer will not be cleared.

Customer Service Mode (CSM)

The Customer Service Mode shows error codes and information on the TVs operation settings.The call centre can instruct the customer (by telephone) to enter CSM in order to identify the status of the set. This helps the call center to diagnose problems and failures in the TV set before making a service call.

The CSM is a read-only mode; therefore, modifications are not possible in this mode.

How to Activate CSM

To activate CSM, press the following key sequence on a standard remote control transmitter: “123654” (do not allow the display to time out between entries while keying the sequence). After entering the Customer Service Mode, the following items are displayed. Use the Right/Left keys to display the next/previous menu items.  Note: Activation of the CSM is only possible if there is no (user) menu on the screen.

How to Navigate

By means of the “CURSOR-DOWN/UP” knob (or the scroll wheel) on the RC-transmitter, can be navigated through the menus.

How to Exit CSM

To exit CSM, use one of the following methods.

 Press the MENU/HOME button on the remote control transmitter.

 Press the POWER button on the remote control transmitter.

 Press the POWER button on the television set.

Software Upgrading, Error code and Panel Code

Software Upgrading

Ready for F/W Upgrade

1. Rename the software as “autorun.upg”.

2. Prepare a USB memory (File format: FLAT, Size: 1G~8G).

3. Copy the software to USB flash disk (root directory).

Note the version of this F/W before you change the software file name.

F/W Upgrade

1. Plug the USB memory on the USB port on the side I/O port of TV (Please connect to USB 2.0 port, not recommend USB3.0 port)

2. AC on (Power plug)

3. TV will upgrade automatically as detect the software.

4. Press OK to start software upgrade.

5. Upgrade in progress

1. After burning software, TV will restart.

2. Press “123654”, enter Customer Service Mode to check if the software version is correct

Caution: Please make sure that software upgrade is finished before unplug the USB and AC power.

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).

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.

How to Read the Error Buffer

You can read the error buffer in three ways:

• On screen via the SAM/CSM (if you have a picture).

– ERROR: 000 000 000 000 000: No errors detected

– ERROR: 013 000 000 000 000: Error code 13 is the last and only detected error

– ERROR: 034 013 000 000 000: Error code 13 was detected first and error code 34 is the last detected (newest) error

• Via the blinking LED procedure (when you have no picture)

In this chassis only “layer 2” error codes are available and point to problems on the SSB. They are triggered by LED blinking when CSM is activated. Only the following layer 2 errors are defined:

How to Clear the Error Buffer

• By using the CLEAR command in the SAM menu

• By using the CLEAR command in the Factory mode:

• 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.

Panel Code

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” in below tab. After resetting the Display Code, restart the set immediately.

SSB power layout

A 715G7734 PSU (For 32” 5813 Series) power board schematic



A 715G8971 PSU (For 43” 5813 Series) power board schematic



LG 52LG50FD, 52LG50FD-SA-Service adjustments-service mode entry-white balance adjustment-ADC component 1 RGB adjustment and more

  These adjustments are similar to 42LB7DF Because this is not a hot chassis, it is not necessary to use an isolation transformer. However...