Panasonic TH37LRU20 - HOSPITALITY LCD HDTV, Service Manual

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TH-42LRU20
6 Troubleshooting Guide
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
6.1. Check of the IIC bus lines
6.1.1. Set "Hotel Mode" Off
SELF CHECK can not be entered if Hotel mode is "On" (Activating). Hotel Mode should be set to "Off" by using only Remote Con-
trol as following procedure.
1. Press [MENU], [G], [Y] and [0] buttons on the remote control by turns to display "Hotel Mode setup menu".
2. Select the item "Mode" and set "Off" status.
3. Select the item "Save" and press [OK] button.
4. Disconnect the AC cord from wall outlet, or press and hold the [POWER] button at right side on the main unit for 10 seconds
or more.
6.1.2. Enter into SELF CHECK
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control
for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote con-
trol for more than 3 seconds.
6.1.3. Exit
Disconnect the AC cord from wall outlet, or press and hold the TV's [POWER] button for 10 seconds or more.
6.1.4. Screen display
6.1.5. Check Point
Confirm the following parts if NG was displayed.
DISPLAY Ref.No. Description P.C.B.
Peaks IC8001 Peaks sLD A-BOARD
TUN TU8300 TUNER A-BOARD
FE IC8300 DEMO DULATOR A-BOARD
ADAM IC8001 sLD A-BOARD
AVSW IC3000 AUDIO VIDEO SWITCH A-BOARD
STBY IC8001 sLD/STM A-BOARD
MEM1 IC8950 EEPROM (sLD) A-BOARD
MEM2 IC1101 EEPROM (STM) A-BOARD
TEMP IC9980 TEMP SENSOR (Non use) A-BOARD
MEM3 IC in LCD PANEL EEPROM (Panel) (Non use) LCD PANEL
DCDC IC4800 DC-DC (T-con) (Non use) A-BOARD
DAC IC4802 DAC (T-con) (Non use) A-BOARD
FRSC IC9004 MPU (TA) TA-BOARD
PRID IC8305 Pro: Idiom TA-BOARD