Pioneer SC-37 Service Manual page 54

1
QQ
Step 4-2: HDMI IN (IN 2,3,4)
3 7 63 1515 0
JA902 (Pin 18) V+5_R2
A
Is the
No
voltage of around
5 V?
Yes
JA902 (Pin 19) HPD2
Is the
No
voltage of around
5 V?
B
Yes
JA902 (Pins 15,16) DSCL2/DSDA2
Does
No
a signal output in
constant period
?
Yes
JA902 R2XC,0,1,2±
(Pins 1,3,4,6,7,9,10,12)
C
Is the
No
voltage of
0.5 Vp-p?
TE
L 13942296513
Yes
IC904 (HDMI Rx)
HDMI Rx
* The diagnoses input from Rx to Tx are omitted due to the
standard of HDMI (refer to the block diagram).
Yes
D
IC1204
SCALER
It passes through when DVC is turned ON, however, it
passes through the bypass route when DVC is turned OFF
refer to the block diagram.
Yes
To Step 4-3
E
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F
54
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2
* Connection No is IN2
Check the source equipment and
HDMI cable.
Check the patterns between
IC904 (Pin 34) and JA902 (Pin 19).
Check the patterns between
IC904 (Pins 35,36) and
JA902 (Pins 15,16).
Check the source equipment and
HDMI cable.
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2
http://www.xiaoyu163.com
3
Step 4-3: HDMI OUT
8
JA1601 (Pin 18)
Is the
voltage of around
5 V?
Yes
JA1601 (Pin 19)
Is the
voltage of around
5 V?
Yes
IC1602 (Pins 46,47)
Does
a signal output in
constant period
?
Yes
IC1602 (Pins 30,31,33,
34,36,37,39,40)
Is the
voltage of
Q Q
3 6 7 1 3
0.5 Vp-p?
Yes
JA1601
(Pins 1,3,4,6,7,9,10,12)
Is the
voltage of
0.5 Vp-p?
Yes
To Step 4-4
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.
SC-37
3
4
* Connection No is HDMI OUT1
2 9 9 4 2 8
L M
No
Check the IC1605 and its
peripheral circuits.
No
Check the video receiver and
HDMI cable.
No
Replace IC1602.
No
Replace IC1602.
1 5 0 5 8 2 9 9 4
No
Check the L1609 - L1612.
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co
4
9 9
2 8 9 9