Pioneer VSX-1020-K Service Manual page 36

1
A
Step 7: COMPOSITE IN, HDMI OUT
CN1254 (Pin 16)
No
Is there a
signal?
P
Yes
IC1701 (Pin 36) (side B)
B
No
Is there a
signal?
Yes
IC1701 (Pins 2,5-8,59-62,
64),R1706 (side B)
Are the
No
signals output?
C
Yes
IC1805 (Pins 3-9),
IC1806 (Pin 4) (side B)
Are the
No
signals output?
Yes
C
D
To Step 8
E
F
36
1
2
A_VVYIN
Check CN1254 and diagnose
the COMPONENT Assy.
A_VVYIN
Check the soldering between
IC1701 and CN1254 and its
peripheral circuits.
Q** RXHSYNC, RXVSYNC,
RXOCLK
Check IC1701 and its peripheral
circuits.
Q16-23
VICLK
Check IC1805, IC1806 and its
peripheral circuits.
2
3
DVC ON, Analog IN, OUT
Step 8: COMPONENT IN
COMPONENT OUT
Note: When the connection is Composite S OUT, refer to the
diagnose of IC800 and later in steps 9 and 10.
Perform the same check items up to
those for IC1701 and R1706 of Step 5-1.
IC1805 (Pins 3-9),
IC1806 (Pin 4) (side B)
Are the
signals output?
Yes
IC800 (through hole)
(Pins E13,D13,E12,D12,E11,
D11,E10,D10,D15) (side B)
Are there
signals?
Yes
R1214
R1219
R1224
Are there
signals?
Q
Yes
Check Q1202 and its peripheral circuits.
Check Q1203 and its peripheral circuits.
Check Q1204 and its peripheral circuits.
Are there
signals?
Q
Yes
CN1254 (Pin 8)
CN1254 (Pin 10)
CN1254 (Pin 12)
Are there
signals?
P
Yes
Diagnose the COMPONENT Assy.
VSX-1020-K
3
4
Q16-23
VICLK
No
Check the soldering between
IC1701 and IC1805, IC1806.
VID0-7, VICLK
No
Check IC1805, IC1806 and its
peripheral circuits.
A_VCYOUT_EM
A_VCBOUT_EM
A_VCROUT_EM
No Check IC800 and its peripheral
circuits.
NG
Replace the D-MAIN Assy.
A_VCYOUT
A_VCBOUT
A_VCROUT
No
Replace Q1202, Q1203, Q1204
and its peripheral parts.
A_VCYOUT
A_VCBOUT
A_VCROUT
No
Check the soldering and
connection of the CN1254.
4