Philips 46PFL5705D – audio output and power supply schematic- How to enter service mode

Service mode – initialization – firmware update procedure – SMPS and audio output section circuit diagram - Philips 46PFL5705 - 46" LCD TV.

Used ICs: R2A15120FA-WOOT (Audio output) – DDA001B1DR2G – DNP005 – DDA005DCQR – DDA006DR

Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit.  If Main Fuse (F1) 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.  For continued protection against risk of fire, replace only with same type 5 A, 250V fuse.  The voltage for parts in hot circuit is measured using hot GND as a common terminal.

SMPS BLOCK DIAGRAM

SMPS SCHEMATIC

SMPS PWB - TOP and BOTTOM SIDE

AUDIO OUTPUT CIRCUIT DIAGRAM

CLICK ON THE PICTURES TO ZOOM IN

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.
1. Turn the power on.
2. Enter the service mode.  To cancel the service mode, press [Power] button on the remote control unit.
3. Press [INFO] button on the remote control unit to initialize the LCD television.
4. "INITIALIZED" will appear in the upper right of the screen. "INITIALIZED" color will change to green from red when initializing is completed.
5. Unplug the AC Cord.

How to set up the service mode

1. Turn the power on.
2. Press [0], [6], [2], [5], [9], [6] and [INFO] buttons on the remote control unit in this order.

Firmware Update Procedure
1. Turn the power off and unplug the AC Cord.
2. Insert the USB storage device to the USB port.

3. Plug the AC Cord and turn the power on.
4. After few seconds, the menu mode will appear on the screen.
Note: After 30 seconds without an operation, the menu mode will disappear automatically.
To display the menu mode again, press the [MENU] button on the remote control unit.
5. Select “Setup” and press the [OK] button to display the setup menu.
6. Select “Software update”.
7. Select “Updates”.
8. Select “USB”.
9. Press the [OK] button on the remote control unit to enter the update mode.  Update file selection screen appears.

Note: To cancel the update mode, select “Cancel” and press the [OK] button.
10. Select the file and press [OK] button.
11. The update will start and the status will appear on the screen.

Note: If the above screen isn't displayed, repeat from step 1.
12. Select “Yes” and press the [OK] button to update.
Note: Do not remove the USB storage device or turn the TV off while update is in progress. 13. When the firmware update is completed, it will be indicted on screen.