Troubleshooting Guide - Sanyo VPC-X1220EX Service Manual

5. TROUBLESHOOTING GUIDE

POWER LOSS INOPERTIVE
PW SW ON
(ON/OFF)
LOW
IC501-B1
(BOOST 4.2 V)
HIGH
LOW
IC501-F6
(AL3.2 V)
HIGH
N O
X5001-1, 2
OSCILLATION
YES
LOW
IC101-AB23
(PW_ON)
PUSH S3501
HIGH
HIGH→LOW
→
HIGH LOW
LOW
IC101-AD21
CHECK IC101, IC501
(P ON)
HIGH
CL191 (VDD1.1) = 1.1 V N O
CL251 (VDD3) = 3.25 V
CL259 (VDD1.8) = 1.8 V
YES
N O
X1102-1, 3
OSCILLATION
R1122, C1121, C1122
YES
CHECK IC101
CHECK F5001
CHECK IC501
CHECK X5001,
C5002, C5001
CHECK IC101
CHECK S3501,
RB104
CHECK PWA BLOCK
CHECK IC101,
X1102, R1121,
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON (S5302)
IC101-AB21 (S1)
PUSH SHUTTER
HALFWAY
HIGH→LOW
→
HIGH
IC101-AB22 (S2)
PUSH SHUTTER
ALL THE WAY
HIGH→LOW
→
HIGH
FLASH OFF MODE
SHOOTING
POSSIBLE
YES
CHECK ST1 BOARD
– 20 –
LOW
CHECK IC101
HIGH
CHECK S3502,
RB104
LOW
LOW
CHECK IC101
HIGH
CHECK S3502,
RB104
LOW
N O
CHECK PWA BLOCK,
IC101