Polaroid V23D series Service Manual page 27

Trouble Shooting
1. MCU platform using Topro TP2808
2. Label：V30DMBT-U21
WBK
V30D-U21
MP 1.1
3. Check Sum：3E86H
BIOS Version：V30DMBT-U21 WBK-MP 1.1 12/21/04
EEPROM INITIAL：Power + Channel Down
4. Enter Factory Mode：Power + Menu Key
5. Leave Factory Mode：Power off
6. Self – Test Mode (for Burn in)：Push Menu + Channel Up + Power ON、Key at same time, and
then loose Power On Key first 、 Keep push Menu and Channel Up Keys for 2 seconds，test pattern
will appear on the screen(Self-Test Mode can't be disable by disconnecting Power Supply, it must
thru. Power Key).
7. Disable Self-Test Mode：Push Power Off/On Key
Steps to clean EEPROM
1. Press POWER key to turn off the LCD-TV.
▽
2. Press CH
remote control to turn on the LCD-TV, after
3 seconds, then release CH▽ key.
3. When「INITIAL EEPROM」appears on the
screen, on the INTTAL EEPROM is complete.
Custom
Model NO.
Edition
26
key , then press Power key of