Panasonic SA-PT160E Service Manual page 88

SA-PT160E / SA-PT160EB / SA-PT160EG
21.2. Basic Troubleshooting Guide for SMPS/MAIN/PANEL
Problems
1) No power supply to unit
2) No FL Display
3) No audio output
Checking Points
a) Check AC cord connection
(open/short)
b) Check fuse F1 on SMPS
Module P.C.B.
c) Check supply voltage to
Main P.C.B. from SMPS
Module P.C.B. (+5V/+7V/2.7V)
d) Check cable connection
between SMPS Module & Main
P.C.B.
e) Check DC voltage (+9.1V)
a) Check supply voltage (Refer
to Item 1) checking points
b) Check SYS6V to IC2018
c) Check oscillator circuit
d) Check soldering condition
a) Check speaker connection
* Solderability condition
b) Check amplifier IC circuit
(audio output)
b) Check supply to amplifier IC
88
Checking Components
F1
H2002 Pin 1, 4, 8, 9, 11
IC2903, L2909 Pin 2, 3
IC2018 Pin 16
X2001, IC2018 Pin13, 16
IC2018, IC6901, FL6901
JK5000
IC5100, IC5200, IC5300
Pin 4, 10
IC5100, IC5200, IC5300
Pin 1