Troubleshooting - Pioneer VSX-C402-S Service Manual

5

7.1.5 Troubleshooting

Power on (using key on main unit)
NO
FL lit?
Yes
SP Output
NO
Indicator
(5 symbol) lit?
Yes
• Check connections between MOTHER and FRONT IN Assys.
• Check soldered bridge at CN4102 and CN1204.
• Defective JA4103
Any error
NO
message
displayed?
Yes
Format Indicator
NO
(for input: characters in red)
and the DOLBY DIGITAL
LED lit?
Yes
NO
5.1 CH
output OK?
Yes
OK
5
6
• Check connections between FRONT Assy
Unit turned
NO
• Check voltage at V5UA and V5UB on FRONT
on from remote
control unit?
• Check oscillation circuit at X4201 and X9001.
• Check ACWP signal at Pin 18 of IC9001.
Yes
Check KEY 1 (Pin 22 of
IC4201 on Front Assy).
• Check V+5D (Pins 8 and 9 of CN1811) and
NO
Level of HPDT
V+5A (Pin 12 of CN1811).
(Pin 57 of IC9001)
• Communication failure of DSP, CODEC or DIR.
L?
Yes
AMP ERR
displayed?
• Check XPROTECT.
Yes
• Check VL/VH voltage.
• Check if SP terminal short-circuited.
• Check settings of source DVD player.
• Check if ANALOG/DIGITAL signal selection switch set to DIGITAL or AUTO.
• Check if input selection for coaxial and Optical 1 set properly.
SURROUND set to AUTO?
Check Output Format Indicator.
Check settings of source DVD player.
Yes
Check output of Pins 5, 7,
9, 11, 13, 15 of CN1813.
Yes
Check waveforms at R1202,
R1203, and R1205-1208.
Yes
Check output of Pins
27-32 of IC1221.
Yes
Check Pins 15 and 17-21
of CN3002.
Yes
Check Pins 3, 7, 10, 14,
18, 22 of CN3001.
Yes
Check SP OUT.
VSX-C402-S
6
7
and MOTHER Assy.
Assy, VSST on MOTHER Assy.
Yes
Check the following:
• 1WUP on Pin 20 of IC9001, ACRY on Pin 1
• Check communication between IC4201 and
NO
Set.
NO
• Check power voltage of each DSP core.
• Check digital input data on Pin 4, 7, 10 of CN1264.
NO
• Check power voltage of IC1301-1303.
NO
• Check control lines and voltages of Pins 36, 37 of IC1221.
NO
• Check power voltage of IC1501-1503.
• Check AMUTE.
NO
• Check power voltage and periphery of IC3301 and IC3401.
7
8
of CN551, XREST on Pin 12 of IC9001.
IC9001.
8
A
B
C
D
E
F
89