Pioneer VSX-820-K Service Manual page 36

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A
Step 7: SDA /SCL (VSX-520-K)
SDA (HDMI OUT)
IC702 (Pin 47)
Does
a signal output in No
constant period
(0 to 5 V)
?
Yes
SCL (HDMI OUT)
IC702 (Pin 46)
B
Does
No
a clock output in
constant period
(0 to 5 V)
?
Yes
IC702 (Pin 49) SDA_SINK
Is
there a same
No
signal as IC703-pin 24
(0 to 3.3V)
?
C
Yes
IC702 (Pin 48) SCL_SINK
TE
L 13942296513 Is
there a same
No
signal as IC702-pin 23
(0 to 3.3V)
?
Yes
* When connected the equipment to IN1 (BD):
IC703 (Pin 40) SDA2 (HDMI IN1 (BD))
D
Is
there a same
No
signal as IC702-pin 49
when selecting
IN1?
Yes
IC703 (Pin 39) SCL2 (HDMI IN1 (BD))
Is
there a same
No
signal as IC702-pin 48
when selecting
E
IN1?
(0 to 5 V)
Yes
* When connected the equipment to IN2 (DVD):
IC703 (Pin 36)
SDA1 (HDMI IN2 (DVD))
Is
there a same
No
www
signal as IC702-pin 49
when selecting
IN2?
(0 to 5 V)
Yes
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Check the JACK702 and IC702.
If JACK702 or IC702 is failure,
replace JACK702 or IC702.
Check the JACK702 and IC702.
If JACK702 or IC702 is failure,
replace JACK702 or IC702.
Check the IC702 and IC703.
If IC702 or IC703 is failure,
replace IC702 or IC703.
Check the IC702 and IC703.
If IC702 or IC703 is failure,
replace IC702 or IC703.
Check the IC702 and JACK703.
If IC702 or JACK703 is failure,
replace IC702 or JACK703.
Check the IC702 and JACK703.
If IC702 or JACK703 is failure,
replace IC702 or JACK703.
Check the IC702 and JACK704.
If IC702 or JACK704 is failure,
replace IC702 or JACK704.
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8
IC703 (Pin 35)
Is
there a same
signal as IC702-pin 48
when selecting
IN2?
(0 to 5 V)
Yes
* When connected the equipment to IN3 (TV/SAT):
IC703 (Pin 32)
Is
there a same
signal as IC702-pin 49
when selecting
IN3?
(0 to 5 V)
Yes
IC703 (Pin 31)
Is
there a same
signal as IC702-pin 48
when selecting
IN3?
(0 to 5 V)
Yes
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To Step 8
Step 8: TMDS
IC702 (Pins 30,31,33,34,36,37,39,40)
Are there
signals(approx. 0.5
Vp-p) in all
lines?
Yes
End
u163
.
VSX-820-K
3
4
2 9 9 4 2 8
SCL1 (HDMI IN2 (DVD))
Check the IC702 and JACK704.
No
If IC702 or JACK704 is failure,
replace IC702 or JACK704.
SDA0 (HDMI IN3 (TV/SAT))
Check the IC702 and JACK705.
No
If IC702 or JACK705 is failure,
replace IC702 or JACK705.
SCL0 (HDMI IN3 (TV/SAT))
Check the IC702 and JACK705.
No
If IC702 or JACK705 is failure,
replace IC702 or JACK705.
1 5 0 5 8 2 9 9 4
TMDS OUTPUT
Check the IC702 or IC703.
No
If IC702 or IC703 is failure,
replace IC702 or IC703.
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co
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9 9
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