Sanyo VPC-E7 Service Manual page 56

5. TROUBLESHOOTING GUIDE
POWER LOSS INOPERTIVE
PW SW ON
(ON/OFF)
LOW
IC302-7
(BOOST 3.8 V)
HIGH
IC302-6, 8
LOW
(BACKUP 3.2 V,
AL3.2 V)
HIGH
LOW
IC301-6, 1
(RESET, BAT_OFF)
HIGH
N O
IC301-7, 8
OSCILLATION
R3001, C3003, C3004
YES
LOW
IC301-23
(POWER_KEY)
PUSH S3302
HIGH
HIGH→LOW
→
HIGH LOW
LOW
IC301-30
CHECK IC301, IC501
(P ON)
HIGH
N O
CL191 (VDD1.2) = 1.2 V
CHECK PWA BLOCK
CL190 (VDD3) = 3.25 V
YES
IC301-17 (CL179)
N O
CHECK IC301, IC101,
(MAIN_RESET)
HIGH
YES
LOW
IC301-3
(PLLEN)
HIGH
N O
X1102-1, 3
OSCILLATION
R1122, C1121, C1122
YES
CHECK IC101, IC121,
IC301
CHECK F5001
CHECK IC302
CHECK IC302
CHECK X3002,
CHECK IC301
CHECK S3302,
RB332, CN301,
CN651
RB101, C1009
CHECK IC301
CHECK IC101,
X1102, R1121,
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON S3303
IC301-64 (S1)
PUSH SHUTTER
HALFWAY
HIGH→LOW
→
HIGH
IC301-24 (S2)
PUSH SHUTTER
ALL THE WAY
HIGH→LOW
→
HIGH
FLASH OFF MODE
SHOOTING
POSSIBLE
YES
CHECK STA BLOCK
– 23 –
LOW
CHECK IC301
CHECK S3303,
HIGH
RB332, CN301,
CN651
LOW
LOW
CHECK IC301
CHECK S3303,
HIGH
RB332, CN301,
CN651
LOW
N O
CHECK DMA BLOCK,
IC301