Primary Power Supply Check - Panasonic TC-26LX20 Technical Manual

Primary Power Supply Check

Is th e standby Voltage at
TP7015 7volts?
OK
Check the AC_ON signal
at TP7003 (0.7V).
OK
Check the voltage at
TP7013 (14V).
OK
Check the
120V_ON_ACT signal at
Pin 14 of PP4 It should be
approx. 0V.
OK
Che ck the voltage at
TP7016 (15V).
OK
The P board appears to be
working properly.
Check the Fuse F7001,
NG
F7002 and IC7005.
Check the Power on switch on
NG
the K Board and the connection
between PK1 and PAP1.
Confirm the PROTECT circuit on AP
Board is working. D824 should
measure 7V.
Check the main controller IC1106
on the DG Board.
NG
Repair the Sub power circuit on
Check the Voltage at Pin 43 on
NG
connector PAP2. (~ 0V)
OK
Confirm the DC- DC
On/Off circuit on the
AP board is functioning
properly.
Repair the Main power circuit
NG
44
OK
OK
the P board.
N
Confirm IC1106 on
Circuit Board DG.
on the P board.
G