Diagnosis; Operational Flowchart - Pioneer DVH-3900MP/XZ/EW5 Service Manual

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5. DIAGNOSIS

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5.1 OPERATIONAL FLOWCHART

A
1. SYSTEM CONTROL ERROR CORRECTION FLOW CHART
Something wrong with
the system control?
B
Checked the fuse?
Checked the back up
Vdd and Gnd, Acc?
Checked the main
Micom Back up, Vdd?
C
Checked the main
Micom back up Gnd?
TE
L 13942296513
Checked the main
Checked the main
D
Checked the ACC in?
detachable switch?
Checked the front
Checked the front
panel switch input?
E
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F
20
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http://www.xiaoyu163.com
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No power?
YES
YES
YES
YES
YES
Micom reset?
YES
Micom X-tal?
YES
YES
Checked the
YES
panel VDD?
YES
YES
OK
x ao
y
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DVH-3900MP/XZ/EW5
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http://www.xiaoyu163.com
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1-A 1-F
NO
Inside of CN801, Fuse(10A)
NO
CN801(16, 15, 14)
NO
IC301(15, 14)
NO
IC401(100, 99, 81, 30, 50, 47, 97, 20, 51)
Q Q
3 6 7 1 3
NO
IC402, IC401(90)
NO
X401, X402
NO
F301, Q301, Q302, IC401(38), CN801(14)
NO
CN901(19), IC401(74)
NO
CN901(14), IC401(21), Q316, Q317
NO
IC401(52, 53)
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3
4
2 9 9 4 2 8
1 5 0 5 8 2 9 9 4
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4
9 9
2 8 9 9