Pioneer SC-37 Service Manual page 58

1
QQ
I
3 7 63 1515 0
A
R1564 (hot side)
No
Is there
a signal?
Yes
Q1504 (Emitter)
No
Is there
a signal?
B
Yes
CN1502 (Pin 16)
Is there No
a signal?
Yes
To Step 4-8
C
Step 4-8: Component IN (at 480i) - Component OUT (DVC ON)
CN1502 (Pins 2,4,6)
TE
L 13942296513
No
Are there
signals?
Yes
IC1102 (Pins 47-50)
D
Are there No
signals?
Yes
IC1102
(Pins 2,5-8,20,59-64)
No
Are there
E
signals?
Yes
(Pin 20: 27 MHz)
R1101,R1107,R1109
Are there No
www
signals?
Yes
F
58
1
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2
O
A_VSYOUT_EM
Check the patterns between
R1564 and IC101.
A_VSYOUT
Check the circuits between
Q1504 and R1564.
A_VSYOUT
Check the patterns between
CN1502 and Q1504.
A_VCYIN,A_VCRIN,A_VCBIN
Diagnose the COMPONENT Assy.
SG_A,SG_B,SG_C
Check the patterns and circuits
between CN1502 (Pins 2,4,6) and
IC1102 (Pins 47-50).
Q16 - Q23,RXOCLK,RXHSYNC,
RXVSYNC,RXDE
Check the IC1102 and its
peripheral circuits
(e.g. VSSDA/VSSCL).
Q16 - Q23
Replace IC1102.
x ao
y
. i
2
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3
8
IC1202,IC1203 (input Pin)
Are there
signals?
(IC1203 input Pin = 27 MHz)
Yes
R1202,R1208,R1212
Are there
signals?
(R1212: 27 MHz)
Yes
IC101 (Through hole)
Are there
signals?
Yes
R1568,R1570,R1572
(hot side)
Are there
signals?
Q Q
3 6 7 1 3
Yes
Q1506 - Q1508
(Emitter side)
Are there
signals?
Yes
To Step 4-9
u163
.
SC-37
3
4
2 9 9 4 2 8
Q16 - Q23,RXOCLK
No
Check the patterns between
IC1202,IC1203 and IC1102.
VID0 - VID7,VICLK
No
Check the IC1202,IC1203 and its
peripheral circuits.
VID0 - VID7,VICLK
No
Check the patterns between
R1202,R1208,R1212 and IC101.
P
A_VCYOUT_EM,A_VCBOUT_EM,
A_VCROUT_EM
No
Check the patterns between
R1568,R1570,R1572 and IC101.
1 5 0 5 8 2 9 9 4
A_VCYOUT,A_VCBOUT,
A_VCROUT
No
Check the circuits between
Q1506 and R1568,Q1507 and
R1570, Q1508 and R1572 .
m
co
4
9 9
2 8 9 9