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5.3
SYSTEM PART
POWER on
"HELLO
PLEASE WAIT"
Display on VFD
OK?
YES
"READING"
display on VFD
OK?
YES
System part OK
CN501, Pin18:
NO
+5.3VA, Pin3: -29VA,
Pin17: -27V, Pin13:
-24V?
X501 10MHz
OK?
R516
About 625kHz Serial
Clock OK?
R523
About 500kHz
OK?
DIG501 Change
CN701, Pin5:
NO
12V, Pin7: 5V,
Pin2: 2.2V, Pin11:
5.3VA?
CA207: 5.3VA
CA210: 1.2V
CA211: 5V
X301: 27MHz
OK?
X302: 25MHz
OK?
Check IC301
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Check SMPS
X501 Change
IC501 Change
IC502 Change
Timer board
Check SMPS
IC202, IC203, IC204 Change
X301 Change
X102 Change
Main board
(No.MB706<Rev.002>)1-15
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