RCA L32WD22 Diagram

L32WD22

Repair Flow Chart

1. No Power (No LED indicator)

Check power cord and board interface

OK

Check F901, BD901, C907

OK

Check IC901, Q901

OK

Check T901

OK

Check D905, D914

OK

Check ZD901

NG

NG

NG

NG

2. Can not start (LED indicator yellow)

NG

NG

Replace ZD901

Replace F901 or BD901 or C907

Replace IC901 or Q901

Replace T901

Replace D905 or D914

Plug in power cord and interface

Check key board

OK

Check 5V SB

OK

Check PWR ON signal

OK

Check RELAY-SW signal

OK

Check main board power supplypart

OK

Check U401, U404

OK

Check I2C communication

NG

NG

NG

NG

NG

Repair the key board

Return to “1”

Check U905, Q906, Q907

Check I2C communication

Replace Q913, Q914

Replace U401 or U404

NG

Replace U905 or Q906 or Q907

L32WD22

3. Abnormal display

Check the source

OK

Check signal filter circuit

OK

OK

NG

Reset source

NG

TV signal Check TV system setup

NTSC, AV,

Component, PC signal

HDMI signal

Replace the filter or inductance

OK

Check TU701

OK

Check U701

Check U108

Check U107

Check U414, U415

NG

NG

NG

Replace U701

Replace U108

NG

NG

Replace TU701

Replace U107

Replace U414, U415

Check U401

NG

Replace U401