Friday, November 27, 2020

JVC MICRO COMPONENT SYSTEM UX-G68E, UX-G68EN, UX-G68EV - How to disassemble, how to enter the check mode - Adjustments

 

3D phonic, radio data system, MP3-WMA-WAV-MPEG-3 ASF PLAYBACK – Digital Direct Progressive Scan

Output Power:  120 W (60 W + 60 W) at 6Ω (10% THD

Speaker units: 

Tweeter:  4 cm cone × 1

Woofer: 12 cm cone × 1

Impedance:  6Ω

Disassembly procedure

Main body

 Removing the Metal cover

(See Fig.1 and 2)

(1) Remove the four screws A (both side) attaching the Metal cover. (See Fig.1)

(2) Remove the two screws B attaching the Rear cover. (See Fig.2)

(3) Remove the five screws C attaching the Metal cover. (See Fig.2)

Removing the Front panel assembly

(See Fig.3 to 5)

(1) Disconnect the card wire from the FL board assembly connected to connector CN205 of the Micon board assembly. (See Fig.3)

(2) Remove the two screws D attaching the Front panel assembly. (See Fig.4)

(3) Disengage the hook a (Fig.4) and hook b (Fig.5) from the bottom chassis. (See Fig.4, 5)

Removing the Fan

(See Fig.6, 7)

(1) Disconnect the connector wire from the Fan connected to connector CN602 of the Audio board assembly. (See Fig.6)

(2) Remove the two screws E attaching the Fan. (See Fig.7)

 Removing the Tuner pack

(See Fig.7, 8)

(1) Disconnect the card wire from the Tuner pack connected to connector CN11 of the Micon board assembly. (See Fig.8)

(2) Remove the two screws F attaching the Tuner pack. (See Fig.7)

Removing the Audio board assembly

(See Fig.9 to 11)

(1) Disconnect the connector wire from the Power transformer connected to connector CN601 of the Audio board assembly. (See Fig.9)

(2) Disconnect the card wire from the USB jack board assembly connected to connector CN811 of the Audio board assembly. (See Fig.9)

(3) Disconnect the card wire from the Audio board assembly connected to connector CN203 of the Micon board assembly. (See Fig.9)

(4) Disconnect the card wire from Micon board assembly connected to connector CN217 of the Audio board assembly. (See Fig.9)

(5) Disconnect the card wire from DVD mechanism assembly connected to connector CN722 of the Audio board assembly. (See Fig.9)

(6) Disconnect the card wire from USB jack board assembly connected to connector CN810 of the Audio board assembly. (See Fig.9)

(7) Disconnect the card wire from Micon board assembly connected to connector CN219 and CN220 of the Audio board assembly. (See Fig.9)

(8) Remove the two screws G attaching the Audio board assembly. (See Fig.9)

(9) Remove the two screws H attaching the Power amplifier IC. (See Fig.10)

(10) Remove the three screws J attaching the Amplifier board assembly. (See Fig.11)

Removing the Micon board assembly

(See Fig.12, 13)

(1) Disconnect the connector wire from Power transformer connected to connector CN202 of the Micon board assembly. (See Fig.12)

(2) Disconnect the card wire from Power trans board assembly connected to connector CN201 of the Micon board assembly. (See Fig.12)

(3) Disconnect the card wire from DVD mechanism assembly connected to connector CN21, CN711 and CN831 of the Micon board assembly. (See Fig.12)

(4) Disconnect the card wire from the USB jack board assembly connected to connector CN206 of the Micon board assembly. (See Fig,12)

(5) Remove the two screws K attaching the Micon board assembly. (See Fig.12)

(6) Remove the four screws L attaching the Micon board assembly. (See Fig.13)

Removing the DVD mechanism assembly

(See Fig.14 to 16)

(1) Remove the two screws M (both side) attaching the bracket. (See Fig.14)

(2) Disconnect the connector wire from DVD mechanism assembly connected to connector CN803 of the USB jack board assembly. (See Fig.15)

(3) Remove the one screw N attaching the DVD mechanism assembly. (See Fig.16)

Removing the USB jack board assembly

(See Fig.17)

Remove the one screw P attaching the USB jack board assembly.

Removing the Power transformer board assembly

(See Fig.18 to 20)

(1) Remove the one screw Q attaching the Power trans board assembly. (See Fig.18)

(2) Remove the one screw R attaching the Power trans board assembly. (See Fig.19)

(3) Disconnect the connector wire from Power cord connected to connector CN101 and disconnect the connector wire from Power transformer connected to connector CN102 of

the Power trans board assembly. (See Fig.20)

Removing the FL board assembly

(See Fig.21)

(1) Remove the five screws S attaching the FL board assembly.

3.1.11 Removing the Key board assembly

(See Fig.21)

(1) Remove the Volume knob.

(2) Remove the six screws T attaching the Key board assembly.

(3) Disengage the six hooks c engaged Key board assembly.

DVD mechanism.  Removing the traverse mechanism

(See Fig.1 to 6)

(1) Remove the two screws A attaching the tramecha holder from top side of DVD mechanism assembly. (See Fig.1)

(2) Remove the two screws B attaching the DVD module board. (See Fig.2)

(3) Remove the four screws C attaching the CB holder and take out it. (See Fig.3)

(4) Remove the four screws D attaching the traverse mechanism. (See Fig.4)

(5) Solder the solder part of DVD pick up. (See Fig.5)

(6) Disconnect the card wire from CN101 and CN201 on the DVD module board. (See Fig. 6)

Caution:

• Solder the short land section on the DVD pickup before disconnecting the card wire from the connector on the DVD pickup. If the card wire is disconnected without attaching solders, the pickup may be destroyed by static electricity. • When attaching the DVD pickup, be sure to remove solders from the short land section after connecting the card wire to the connector on the DVD pickup.

Removing the pickup assembly

(See Fig.7 to 11)

(1) Remove the two rod springs pressing the guide shaft. (SeeFig.7)

(2) Remove the screw E and F attaching the spring holder. (See Fig.8)

(3) Remove the read screw from traverse mechanism assembly. (See Fig.9)

Caution:

When remove the lead screw, do not loss the middle gear. (See Fig.10 and 11)

(4) Remove the bar spring pressing the shaft. (See Fig.10)

(5) Take out the pickup assembly from traverse mechanism chassis by order. (See Fig.11)

Removing the feed motor assembly

(See Fig.12)

(1) Remove the one screw G attaching the feed motor assembly.

(2) Remove the feed motor wires from solder part of spindle motor board.

Removing the spindle motor assembly

(See Fig.13)

Remove the two screws H attaching the spindle motor from spindle motor board.


Removing the tray assembly

(See Fig.14 & 15)

(1) Remove the two screws J attaching the clamper base. (See Fig.14)

(2) Remove the one screw K attaching the shaft guide from bottom side. (See Fig.14)

(3) Remove the two screws L attaching the shaft guide from top side. (See Fig.15)

Caution:

When attach the tray assembly, boss of loading sub assembly should attach to guide of bottom side at tray assembly. (See Fig.15)

ADJUSTMENTS

Attention in service of DVD section

(1) When pickup, Flash ROM, DVD module board were changed, initialize EEPROM by all means.

(2) When full initialization was executed, execute learning with a DVD test disk by all means.

Test disc : VT-501, VT-502

Learning method: It is adjusted automatically by normal playback of a DVD test disc.

DVD test mode

TO ENTER DVD TEST MODE, TO EXIT DVD TEST MODE

(1) During TEST MODE (except for Device Key write & DVD Region Re-write), press POWER key.

(2) To exit TEST MODE for Device Key Write & DVD Region Re-write, first AC OFF, then AC ON again to return to normal state.

DVD MODULE EEPROM INITIALIZATION, DEVICE KEY CHECKSUM DISPLAY

DVD CHECK MODES

(1) AC Power OFF.

(2) Press and hold DVD/CD + keys on the front panel. Then AC power ON while holding these keys.

(3) DVD mechanism will start in TEST MODE. The following will be display on the set.

xx = Destination information as follows; JC/1U/D/E/2U/3U/UB/UT/4U/UY/EE/UF

y = region number

v = study state information from MECHA-CON

w = initialization state from MECHA-CON

TO EXIT DVD TEST MODE

(1) During TEST MODE (except for Device Key write & DVD Region Re-write), press POWER key.

(2) To exit TEST MODE for Device Key Write & DVD Region Re-write, first AC OFF, then AC ON again to return to normal state.

DVD MODULE EEPROM INITIALIZATION


DEVICE KEY CHECKSUM DISPLAY

(1) During TEST MODE, press MENU key on remote control to enter DEVICE KEY CHECKSUM display for DVD-AUDIO (CPPM).

(2) System will display as follows.

(3) Press MENU again to enter DEVICE KEY CHECKSUM display for DVD-VR MODE (CPRM).

(4) System will display as follows.


Friday, November 13, 2020

TCL50P6, TCL49U7800 LED LCD TV- How to enter the Service mode, How to upgrade the software, power supply schematic

 

Applicable to: TCL49U7800, TCL50P6, TCL55P6, TCL65P6, TCL50P65, TCL 55P65, TCL65P65

How to access factory menu.

Whenever you request access to the Factory menu, you must perform the following procedure:

- Turn on the device;

- On the remote control, press the MENU key (key);

- Select Advanced Settings;

- Select IMAGE menu;

- Select the CONTRAST option;

- On the remote control, press the number sequence 9735;

- The factory menu will be available.

With the TV on enter the Factory menu. In it, verify that the installed software version is correct.


Main SW update via the User Menu.

- Download the compressed file update.zip, change the name and extension to “V8-S586T03 -LF1VXXX.bin ”where XXX is the version number.

Save the file to the root of a USB device.

- Connect the USB device, with the software, to the USB port.

- Select MENU (Key) Update Support. via USB.

- The device will find the Vxxx software. Press "Update".

The update will start. After approximately 4 minutes the TV will automatically restart.

- After restarted, perform the reset by going to the settings menu “MENU (key)

Restart the TV. 

Confirmation and password request is requested. Enter 1234 and press "OK".

- After this the TV will restart.

Note: The version of the Software to be used must be the one informed in the material plan of the respective product.

Save the file to the root of a USB device by renaming it “update.zip”.

- With the device disconnected from the mains, connect the USB device with the installation software, on the USB port.

- Pressing the TV's Power key and keeping it pressed, connect the TV to the mains

- The update will start. After approximately 4 minutes the TV will restart automatically.

- After restarting, perform the reset by going to the settings menu “MENU (key) Support

Restart the TV. Confirmation and password request is requested. Enter 1234 and press "OK".

- After this the TV will restart.

PROJECT ID CHANGE

(If panel information is wrong)

If the screen is completely dark due to the difference in panel x installed software, press 062598 + MENU + xxx (xxx: Panel ID)

For the correct identification of the product, observe the beginning of its serial number.

With this, you can insert the correct values on the plate and restore the product to function.

New panels may be introduced in the future and if the model is one of those listed above but the serial number does not start with any of these informed, obtain the Panel ID from SEMP TCL suitable for the product.

After the update, the TV will enter TV mode and the channel that was previously selected.

Enter the factory menu again, select option 3 - Reset Shop, press enter.

After the reset, switch on the device using the power key.

Panel test mode (warm -up)

Recommended for analysis of panels (spots, dots, scratches, etc.).

Enter the Service Menu as indicated before, turn on the option “Factory hotkey” and turn on the “WARM -UP” function.

A sequence of screens in different colours will be generated where it can be verified with more details, possible panel failures.

In the same “WARM - UP” mode, a table with the main product information will be displayed in the lower right corner.

In this table we have the project information:

We have the project ID, as shown in the table above and following the version of the software in use.

Below the information of the recorded keys (MID):

MAC (Mac Address) Without recording this key, it is not possible to connect to the internet via ethernet (LAN);

DID (Device ID) Product Factory Control; Already included in the main software.

ESN (Netflix) Without recording this key, you will not be able to access Netflix services;

HDCP Without recording this key, high definition images from the HDMI inputs will not be reproduced;

HDCP2.0 Without recording this key, 4K images will not be reproduced;

WIDEVINE Without recording this key, content from YOUTUBE and other sites will not be played.

The last key marked “NULL” in this project refers to the requirements of the European broadcasts (DVB digital format) that are not required in Brazil. Ignore this key.

IMPORTANT NOTE: If some of the other keys are not recorded, the “NULL” information to replace the respective key on that line.

In this case, SEMP TCL support should be contacted for instructions from recording procedures.

To EXIT the “WARM - UP” mode, press the POWER key on the device because the functions remote control will be disabled and if the device is just disconnected from the network, the “WARM - UP” mode will return when the network is connected again.

After exiting WARM - UP, enter the factory menu again and turn off the option

Factory Hotkey or give a user reset.

Tension table and software update

Block diagram

PSU Connector (12V) schematic. Only for 12V(14PIN)

12volt to 5volt schematic


12volt to 3V3 volt

12volt to 1.5volt [CPU power]

5volt to 1.1volt [core power]

Audio amplifier circuit

Audio amplifier circuit [AD82587D]

49U7800 power schematic



50P6US power schematic


55P6US power schematic


65P6US power schematic



50P65US & 55P65US power schematic


65P65US power schematic



REMOTE CONTROL CT8518 - RC802N


Monday, November 02, 2020

Philips 43PUS7304, 50PUS7354, 55PUS8804, 75PUS7354 - Operating System Android Pie 9 - LED Ambiligit smart TV - software update, service mode, power and audio section schematic, Error codes, Option codes.

 

Applicable to:

43PUS7304-12, 43PUS7334-12, 43PUS7354-12, 43PUS7394-12, 50PUS7304-12, 50PUS7354-12, 50PUS7504-12, 50PUS8804-12, 55PUS7304-12, 55PUS7354-12, 55PUS7354-12, 55PUS7504-12, 55PUS8804-12, 70PUS7304-12, 75PUS7354-12

Chassis TPM19.1E LA. Platform MTK5599

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.

• Be careful during measurements in the high voltage section.

• Never replace modules or other components while the unit is switched “on”.

• When you align the set, use plastic rather than metal tools. This will prevent any short circuits and the danger of a circuit becoming unstable.

Diagonal screen size

108 cm - 43 inch, 126 cm - 50 inch, 139 cm - 55 inch, 146 cm - 58 inch, 164 cm - 65 inch, 178 cm - 70 inch, 189 cm - 75 inch

Alternative 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. 28PW9515-1d2), 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 Centre (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.


Service Modes.

The Service Mode feature is split into following parts:

Service Alignment Mode (SAM).

Factory Mode.

Customer Service Mode (CSM) SAM and the Factory mode offer features, which can be used by the Service engineer to repair or align a TV set.  SAM and the Factory mode offer features, which can be used by the Service engineer to repair/align a TV set. Some features are:

Make alignments (e.g. White Tone), reset the error buffer(SAM and Factory Mode).

Display information (“SAM” indication in upper right corner of screen, error buffer, software version, operating hours, options and option codes, sub menus).

The CSM is a Service Mode that can be enabled by the consumer. The CSM displays diagnosis information, which the customer can forward to the dealer or call Centre. In CSM mode, “CSM”, is displayed in the top right corner of the screen. The information provided in CSM and the purpose of CSM is to:

Increase the home repair hit rate.

Decrease the number of nuisance calls.

Solved customers’ problem without home visit.

Note: For the new model range, a new remote control (RC) is used with some renamed buttons. This has an impact on the activation of the Service modes.  For instance the old “MENU” button is now called “HOME” (or is indicated by a “house” icon).

Service Alignment Mode (SAM)

To modify the NVM.

To display/clear the error code buffer.

To perform alignments.

Specifications.

Operation hours counter (maximum five digits displayed).

Software version, error codes, and option settings display.

Error buffer clearing.

Option settings.

Software alignments (White Tone).

NVM Editor.

Set screen mode to full screen (all content is visible).

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 or 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 or 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 or DOWN keys to display the next or previous menu items.

With the “LEFT or 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”, you can use the UP or 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.)

SAM mode overview

Factory mode:  To perform extended alignments.

Displaying and or changing Panel ID information.

Displaying and or changing Tuner ID information.

Error buffer clearing.

Various software alignment settings.

Testpattern displaying.

Public Broadcasting Service password Reset. etc.

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 or home” press “1999”, directly followed by the “Back or 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 or DOWN keys to display the next or previous menu items.

How to Exit the Factory mode

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.

Factory mode overview.

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 Centre 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.

Specifications

Ignore “Service unfriendly modes”.

Line number for every line (to make CSM language independent).

Set the screen mode to full screen (all contents on screen is visible).

After leaving the Customer Service Mode, the original settings are restored.

Possibility to use “CH+” or “CH-” for channel surfing, or enter the specific channel number on the RC.

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 or Left keys to display the next or 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 or 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 or HOME button on the remote control transmitter.

Press the POWER button on the remote control transmitter.

Press the POWER button on the television set.

CSM overview

Software Upgrading, Error code and Panel Code

Software Upgrading:  The following update is for .pkg file.

1. Rename the file to “upgrade-loader.pkg”.

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

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

4. Switch off the TV and Insert the USB memory stick that contains the software update files in one of the TV’s USB 2.0 port.

Note: It contains USB3.0 port, if connect on it, the software may can’t be detected.

5. Switch on the TV. The TV will detect the USB memory s tick automatically. Then a window jumps out as below:

6. When the TV software is updated, the TV will turn on again automatically. Remove your USB flash drive.

7. We can enter in CSM or Factory mode to check the current software version.

The following update is for .upg file.

Ready for Firmware Upgrade

1. Rename the file to “autorun.upg”.

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

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

4. Switch on the TV and Insert the USB memory stick that contains the software update files in one of the TV’s USB 2.0 port.

Note the version of this Firmware before you change the software file name.

Press [Settings], then Choose [Search for update] in the Settings menu.

2. Choose [USB], then press OK

3. Choose [Identify], then press OK

4. Select the file that you downloaded and press OK

5. Identify the software and choose [Done], then choose [Start] on following step.

6.Choose [Upadte] press OK start the software update.  Upgrade in progress.

Check the SW versio

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 Code

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

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

Example:

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).

Error codes overview.

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

The error code buffer is cleared in the following cases:

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.

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


POWER BOARD A715GA018 – For 50”, 55” 73x4, 50” 55” 7504 Series – schematic


POWER BOARD A715GA025 – FOR 65”, 70”, 75” 73X4 and 55”, 65” 8804 series – schematic


POWER BOAR A715GA052 – For 43”, 73x4 Series – schematic

Audio output schematic