Troubleshooting Guide - Sanyo VPC-CS1 Service Manual

5. TROUBLESHOOTING GUIDE

POWER LOSS INOPERATIVE
PUSH THE POWER
SW FOR A WHILE
NO
CL305/CL307
CHECK POWER SW
SAME WAVEFORM
YES
CL305/CL307
NO
WAVEFORM
"L" PERIODICALLY
YES
LOW
PON SIGNAL
(CL532)
HIGH
VDD3
NO
VDD1.8
CHECK IC501, IC502
VDD1.1
YES
CHECK IC102, IC121
NO PICTURE
IC101-A3 (XOUT)
NG
CHECK IC101, X1102
CHECK
OSCILLATION
OK
CHECK IC102, IC121
CHECK IC101
CHECK IC101
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON
KEY_1ST, KEY_2ND
INPUT
PAON1, PAON2,
VAA2.8
LVDS, I2C
COMMUNICATION
CHECK IC101
– 24 –
NO
CHECK UNIT SW
YES
LOW
CHECK IC101,
IC501, I2C
HIGH
CHECK
NG
CMOS MODULE,
CAA BLOCK, IC101
OK