Troubleshooting Guide - Sanyo VPC-MZ3EX Service Manual

5. TROUBLESHOOTING GUIDE

POWER LOSS INOPERTIVE
PUSH MAIN SW
NO
IC301-45 (SCAN IN 6)
CHECK CN303-3
PULSE INPUT
YES
LOW
IC302-7 4.7 V
CHECK PW1, IC952
(BOOST 4.7 V)
HIGH
LOW
IC301-10
(VDD)
HIGH
LOW
IC301-36
CHECK IC302, R3004
(RESET)
HIGH
LOW
IC301-43
(BAT OFF)
HIGH
NO
IC301-40
OSCILLATION
YES
NO
IC301-37
OSCILLATION
YES
CHECK IC301
NO PICTURE
MAIN CLOCK FOR SYSTEM OPERATION
CHECK CLK
NO
OSCILLATION X1101, NO OPERATION IF ABSENT
CHECK X1101 OSCILLATOR, R1101 AND IC111
IC111, R1101
YES
SD CLK
SD RAM (IC103) MOVEMENT CLOCK
NG
OSCILLATION
NO READ PROGRAM FROM IC121 IF ABSENT
R1103
CHECK IC102, IC103
OK
INCORRECT HAND
NG
IC102-62, 63
SHAKING 8-BIT CPU
IC301-15, 16
CHECK EACH INTERFACE
OK
CHECK SOLDERING
OF MEMORY PIN
CHECK IC302
CHECK R3003
CHECK X3001
CHECK X3002
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON
IC301-55, 45
(SCAN IN 5, 6)
PULSE INPUT
CN301-18, 15
(P ON, P(A) ON)
SERIAL
COMMUNICATION
CHECK CA2
– 18 –
CHECK S3001,
NO
D3012, D3013,
R3038, R3037
YES
LOW
CHECK IC301,
RB302, PW1
HIGH
NG
CHECK
IC301, CA2
OK