61
1
3
4
1
3
4
C
D
F
A
B
E
TS7, BCT-1710, BCT-1720, BCT-1730
[Analog Audio Section]
((F))
(from page 57)
[Check the Power supplied properly.]
↓
[Examine IC4004(CS4334 D/A converter) input]
(IC4004 : Pin 1 : SDATA)
[Examine IC4004(CS4334 D/A converter) output]
(IC4004 : Pin 8 : L, IC4004 : Pin 5 : R)
↓
<How is the result?>
[Trace the line going up to OMEGA: STi5512]
NO
OK
[Examine IC4001(CXA2161R A/V Switch) Audio outputs.]
OK
<Q4015 corrector : –3.3V?>
(POWER_MUTE)
OK
YES
[Examine IC4003(NJM4558 OP Amplifier) output]
(IC4003 : Pin 1 : L, IC4003 : Pin 7 : R]
YES
↓
<How is the result?>
↓
↓
[Select where to go from below.]
↓
<How is the result?>
[Replace IC4003.]
NG
[Replace IC4001.]
NG
[Examine around the Muting transistors]
(Q4001/Q4002/Q4009/Q4010/Q4015)
NO
↓
<Are they OK?>
[Replace IC4002.]
NO
TV-SCART & VCR-SCART & CINCI
→
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
_
→
→
→
→
→
→
TV-SCART & VCR-SCART
TV-SCART & CINCI
TV-SCART
VCR-SCART
CINCI
Others
Examine ; IC4001
Pin 25: TV_L Pin 26: TV_R Pin 27:VCR_L
Pin 30:RCA_L
Pin 28:VCR_R
Pin 31:RCA_R
Audio output terminals which are NG
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
