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DVH-3900MP/XZ/EW5
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5. DIAGNOSIS
5.1 OPERATIONAL FLOWCHART
Something wrong with
the system control?
1. SYSTEM CONTROL ERROR CORRECTION FLOW CHART
1-A
~
1-F
No power?
YES
Inside of CN801, Fuse(10A)
YES
NO
Checked the fuse?
CN801(16, 15, 14)
YES
NO
Checked the back up
Vdd and Gnd, Acc?
IC301(15, 14)
YES
NO
Checked the main
Micom Back up, Vdd?
IC401(100, 99, 81, 30, 50, 47, 97, 20, 51)
YES
NO
Checked the main
Micom back up Gnd?
IC402, IC401(90)
YES
NO
Checked the main
Micom reset?
X401, X402
YES
NO
Checked the main
Micom X-tal?
F301, Q301, Q302, IC401(38), CN801(14)
YES
NO
Checked the ACC in?
CN901(19), IC401(74)
NO
Checked the
CN901(14), IC401(21), Q316, Q317
NO
IC401(52, 53)
NO
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TEL 13942296513
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299