Troubleshooting No Power/Dead Unit - Panasonic G20 Series Troubleshooting Handbook

These 3 conditions can cause the TV to be dead with no power.
1. A Board.
2. P Board.
3. K Board
Condition
Most Common
Dead
Cautions: Disconnect the AC Power prior to making any disconnection or connection.
When taking voltage reading, place the voltmeter probe at the test point, component, or connector's pin indicated before
connecting the TV to the AC line. This will ensure voltage reading accuracy before the TV shuts down. (Since the TV is
shutting down, expect the voltage to only come up a couple of seconds.)
P
P
STB
Circuit
P9
Power
MICOM
RELAY

Troubleshooting No Power/Dead Unit

List of boards likely to cause this symptom.
nd
2
P A
P7 A7
STB5V
1 1
3.2V
5 5
7 7
IC603
3.2V
rd th
3 4
K
IC5480
3.3V
REG
STB3.3V
Vcc
TV_SUB_ON
KEY_INPUT
PANEL_MAIN_ON
POWER
SWITCH
th
5
A
A
3
IC1100
SYSTEM
6
MPU
5
A1
th th
6 7
K
K
REMOTE
REC.
3
LED
6
5
K1
Slide 58