Pioneer VSX-1020-K Service Manual page 33

5
A
J
IC1501
HDMI Rx IC
IC1807,IC1808(side B),IC1809,
IC1810(side B),IC1811(side B)
(Pins 11-17)
No
Check IC1807-IC1811 and its
Are signals
peripheral circuits.
output?
Whole
Yes
diagram
K
IC1800
Video Scalar IC
L
IC9000
HDMI Tx IC
HDMI OUT
JA9000 (OUT 1)
TMDS signal
(Pins 1,3,4,6,7,9,10,12)
Is there
No
Check the soldering of JA9000
0.5Vp-p in CLK
and IC9000, and its peripheral
and DATA?
circuits.
M
Yes
JA9000 (Pin 18)
+5V
No
Check IC9001 and its peripheral
Is the voltage
circuits.
around 5 V ?
Yes
JA9000 (Pin 19)
Hot plug detect
No
Is the voltage
Check the sync equipment.
around 5 V ?
Yes
To Step 4-2
5
6
A
P** HSYNC VSYNC
PDE, PDCLK
NG
Check IC1501 and its
peripheral circuits.
B
VSX-1020-K
6
7
Step 4-2: BD IN
JA9551 (Pin 18)
+5V
No
Check the soldering of JA9551.
Is the voltage
Check the source equipment
around 5 V ?
connected in JA9551.
I
Yes
JA9551 (Pin 19)
Hot plug detect
Check IC1601 and its peripheral
No
Is the voltage
circuits.
around 5 V ?
Yes
JA9551 (Pins 15,16)
DDC (SDA/SCL)
Does
No
Check the soldering of JA9551
a signal output in
constant period
and the path.
?
Yes
JA9551
TMDS signal
(Pins 1,3,4,6,7,9,10,12)
Is there
No
Check the soldering of JA9551
0.5Vp-p in CLK
and the path.
and DATA?
Yes
IC1601 (Pins 67,68,
TMDS signal
70,71,73,74,76,77)
Is there
No
Check IC1601 and its peripheral
0.5Vp-p in CLK
circuits.
and DATA?
N
Yes
A
To Step 4-3
7
8
A
B
C
D
E
F
33
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