Trouble Shooting - Pioneer VSX-C550-S Service Manual

5

7.1.6 Trouble Shooting

QQ
3 7 63 1515 0
START
Is FL turn on ?
Yes
Is not error
message
indicate it ?
Yes
Are format indicator
(red for input) and
DOLBY DIGITAL LED
lighting?
Yes
TE
L 13942296513
5.1 CH output
is OK?
Yes
OK
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• Check the connection (FRONTAssy - POWER Assy)
NO • Check each voltages of V+5R6, AC1, AC2 and V-FL (FRONT Assy)
• Check the oscillation of X4201 (FRONT Assy)
• Check ACWP signal (FRONT Assy: pin 4 of IC4201)
• Check ACRY signal (POWER Assy: base of Q201)
AMP ERR
NO
OVERLOAD
indication ?
Yes
• Check the connection (POWER Assy to DSP Assy)
• Check the voltage of IC301 and IC341
• Is not a SP edge short-circuiting?
• Check the connection (DSP Assy - DIGITAL IN Assy)
NO
• Check the send DVD player setting
• Check the voltage of IC1101(DSP Assy)
• Is the switch of analog / digital signal becoming with digital or AUTO?
• Is input switch setting of coax and optical 1 properly ?
Check SURROUND: AUTO
NO
Check the indicator of output format
Check the send DVD player setting
Yes
Check the output of pins
25-31 of IC1101 (DSP Assy)
Yes
Check the output of pins
31-36 of IC1409 (DSP Assy)
Yes
Check the output of pins
3-13 of CN1501 (DSP Assy)
Yes
R317, R318, R357, R358,
R386 (POWER Assy)
Yes
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• Check the control of protection relay y
Q387, Q389: (POWER Assy) B= "H"
• Check the voltage of RY301, RY341, RY381 (POWER Assy)
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2 9
8
NO
THDCT NG
indication ?
Yes
• Check thermistor installation
TH9014
Q Q
3 6 7 1 3 1 5
NO
• Check each voltages of IC1101 (DSP Assy) (+5V)
• Check the oscillation of X1101 (DSP Assy)
NO
• IC1101 (DSP Assy)
• Check the digital input data and clock (pins 9-13)
NO
Check the input of pins
6-15 of IC1409 (DSP Assy)
Yes
Check the control lines and voltages of pins 39-41 of
NO
IC1409 (DSP Assy)
• Check the outputs of IC1502 and IC1503 (DSP ssy)
• Check the control of AMUTE: Q1503 (DSP Assy)
C= "L"UNMUTE
• Check the output and control of IC1704 (DSP Assy)
NO
Check the voltage and periphery of IC301 and IC341
co
.
VSX-C100-S
7
9 4 2 8
NO DSP NG
indication ?
Yes
• Check the connection
(FRONT Assy - DSP Assy)
• Check the voltage of IC1201 to IC1204 and
IC1208 (DSP Assy)
• Check the oscillation of X1201(DSP Assy)
• Check the following communications:
IC1201 (DSP Assy): pins 8-11, 14-17 and
IC1204 (DSP Assy): pins 21-23, 25-29
0 5 8 2 9 9 4 2 8
Set
Check the outputs and
NO
voltages of IC1301-
IC1303 (DSP Assy).
m
8
9 9
A
B
C
9 9
D
E
F
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