Denon AVR-2308CI Service Manual page 23

Q Q
3 7 6 3 1 5 1 5 0
J
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
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 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.
Output Y : IC308-1pin
T E
Output C : IC308-7pin L 1 3 9 4 2 2 9 6 5 1 3
OK
Check input/output of analog SW.
Input Y : IC104-5pin
NG
Input C : IC104-14pin
Output Y : IC104-3pin
Output C : IC104-13pin
OK
Check input/output of AMP.
Input Y : IC111-3pin
NG
Input C : IC111-5pin
Output Y : IC111-1pin
Output C : IC111-7pin
OK
Check cable between main unit and
monitor or Check monitor .
Unless specified, 1U-3853-1 A.VIDEO UNIT part.
w w w
.
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 : L0V)
OK
Check soldering of IC102and IC106.
Check analog SW settings.
Check IC301 and CX073 soldering, or
NG
IC104-10pin : H(+5V)
DIGITAL UNIT flaw.
IC104-9pin : L(0V)
OK
Check soldering of IC104.
Check soldering of IC111.
x a o
y
i
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8
OK
OK
OK
Q Q
3 7 6 3
OK
OK
OK
u 1 6 3
.
23
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AVR-2308CI / AVR-888 / AVR-2308 / AVC-2308
9 2 4 9 8
NG
NG
OK
NG
NG
1 5 1 5 0 8 9 2 4
NG
OK
NG
m
c o
2 9 9
NG
9 8 2 9 9
NG