Denon AVR-2308CI Service Manual page 13

Q Q
3 7 6 3 1 5 1 5 0
B
Input
S
1U-3853-1 A.VIDEO UNIT
To troubleshooting 1.1 Power not turn
Check 5VA. NG
on.
+5VA : CX077-3,4pin
-5VA : CX077-5pin
OK
1U-3853-1 A.VIDEO UNIT
Check input/output of analog SW.
Input Y : IC102-13pin
NG
Input C : IC106-13pin
Output Y : IC102-3pin
Output C : IC106-3pin
OK Check soldering of IC102 and IC106.
Check input/output of AMP.
Input Y : IC113-5pin
NG Check soldering of IC113, IC114 and
Input C : IC114-5pin
surrounding parts.
Output Y : IC113-7pin
Output C : IC114-7pin
OK
Check input/output of AMP.
Input Y : IC308-3pin
NG Check soldering of IC308 and sur-
Input C : IC308-5pin
rounding parts.
T E
Output Y : IC308-1pin L 1 3 9 4 2 2 9 6 5 1 3
Output C : IC308-7pin
OK
Check output to 1U-3852 DIGITAL UNIT.
NG
Output Y : CX113-3pin
Output C : CX113-1pin
OK
Check input of video driver
Check CX113 soldering, or DIGITAL
NG
Input Y : IC305-2pin
UNIT flaw.
Input C : IC305-4pin
OK
Check output of video driver.
NG
Output V : IC305-36pin
OK
Check input/output of analog SW.
NG
Input : IC108-14pin
Output : IC108-13pin
OK
Check input/output of AMP.
NG
Input : IC112-5pin
w w w Output : IC112-7pin
OK
Check cable between main unit and
.
monitor or Check monitor.
Unless specified, 1U-3853-1 A.VIDEO UNIT part.
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Check analog SW settings.
IC102-9,10,11pin : L(0V)
Check IC301 and CX073
NG
IC102-6pin : L(0V)
soldering, or DIGITAL UNIT flaw.
IC106-9,10,11pin : L(0V)
IC106-6pin : L(0V)
OK
Check soldering of CX113.
Check soldering of IC305.
Check analog SW settings.
NG Check IC301 and CX073 soldering, or
IC108-10pin : H(+5V)
DIGITAL UNIT flaw.
IC108-9pin : L(0V)
OK
Check soldering of IC108.
Check soldering of IC112.
x a o u 1 6 3
y
i
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8 9
OK
OK
OK
Q Q
3 7 6 3 1 5 1
OK
OK
OK
OK
OK
OK c o
.
13
AVR-2308CI / AVR-888 / AVR-2308 / AVC-2308
2 4 9 8 2
NG
NG NG
OK
NG
NG
5 0 8 9 2 4 9 8 2
NG
NG
NG
NG NG
OK
NG
m
9 9
9 9