Pioneer SC-37 Service Manual page 40

1
QQ
Step 1-6: Coaxial/Optical/AD IN (STEREO)
3 7 63 1515 0
X9001 (Pin 3)
A
No
Is there
a signal?
Yes
IC9011 (Pin 13)
No
Is there
a signal?
B
Yes
IC9011 (Pin 11)
No Check the IC9011 and its
Is there
a signal?
Yes
SC-LX83,SC-LX73
C
IC1808 (Pin 3)
Is there No
a signal?
TE
L 13942296513
Yes
IC1808 (Pin 4)
Is there No
a signal?
D
Yes
CN9302 (Pin 26)
Is there
No
a signal?
Yes Yes
E
www
F
40
1
http://www.xiaoyu163.com
2
Check the X9001 and its peripheral
circuits.
Check the patterns between
IC9011 (Pin 13) and X9001 (Pin 3).
DIRMCK
peripheral circuits.
SC-37,SC-35, only
DIRMCK
Check the patterns between
IC1808 (Pin 3) and
IC9011 (Pin 11).
DIRMCKI
Check the IC1808 and its
peripheral circuits.
DIRMCKI
SC-37,SC-35
Check the patterns between
CN9302 (Pin 26) and
IC1808 (Pin 4)
SC-LX83,SC-LX73
Check the patterns between
CN9302 (Pin 26) and
IC9011 (Pin 11)
x ao
y
. i
2
http://www.xiaoyu163.com
3
8
CN9302 (Pins 19,21,22,28)
Are there
signals?
Yes
SC-LX83,SC-LX73
IC1808 (Pins 6,10)
IC1810 (Pins 5,14)
Are there
signals?
Yes
IC1808 (Pins 7,9)
Are there
signals?
Yes
IC1810 (Pins 2,11)
Are there
Q Q
3 6 7 1 3
signals?
Yes
IC1810 (Pins 2,5,11,14)
Are there
signals?
Yes
IC1810 (Pins 4,7,9,12)
Are there
signals?
Yes
A
u163
.
SC-37
3
4
C G H J
2 9 9 4 2 8
DIRMCKO
DIRBCK
DIRLRCK
DIRDATO
No
Diagnose the DAC Assy.
SC-37,SC-35 only
DIRMCKO,DIRDATO,DIRBCK,
DIRLRCK
No
Check the patterns between
IC1810 (Pins 2,5,11,14) and
CN9302 (Pins 19,21,22,28).
(Include R1857 and R1907)
No
Check the IC1808 and its
peripheral circuits.
(XXM signal: High)
No Check the patterns between
1 5 0 5 8 2 9 9 4
IC1810 (Pins 2,11) and
IC1808 (Pins 7,9).
DIRMCKO,DIRDATO
DIRBCK,DIRLRCK
No Check the patterns between
IC1810 (Pins 2,5,11,14) and
CN9302 (Pins 19,21,22,28).
No
Check the IC1810 and its
peripheral circuits.
(USBSW signal: Low)
m
co
4
9 9
2 8 9 9