Pioneer VSX-LX52 Service Manual page 41

5
Step 7: COMPOSITE IN, HDMI OUT
CN1254 (Pin 3)
A_VVYIN
No
Check CN1254 and diagnose
Is there a
the COMPONENT Assy.
signal?
P
Yes
IC1701 (Pin 36) (side B)
A_VVYIN
No
Check the soldering between
Is there a
signal?
IC1701 and CN1254 and its
peripheral circuits.
Yes
IC1701 (Pins 2,5-8,59-62, Q** RXHSYNC, RXVSYNC,
64),R1706 (side B) VOCLK
Are the
No
Check IC1701 and its peripheral
signals output?
circuits.
Yes
IC1805 (Pins 3-9), Q16-23
IC1806 (Pin 4) (side B) VICLK
Are the
No
Check IC1805, IC1806 and its
signals output?
peripheral circuits.
Yes
C
To Step 8
5
6
DVC ON, Analog IN, OUT
Step 8: COMPONENT IN
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?
IC800 (through hole)
(Pins E13,D13,E12,D12,E11,
D11,E10,D10,D15) (side B)
Are there
signals?
Are there
signals?
Q
Check Q1202 and its peripheral circuits.
Check Q1203 and its peripheral circuits.
Check Q1204 and its peripheral circuits.
Are there
signals?
Q
CN1254 (Pin 7)
CN1254 (Pin 9)
CN1254 (Pin 11)
Are there
signals?
P
Diagnose the COMPONENT Assy.
VSX-LX52
6
7
COMPONENT OUT
Q16-23
VICLK
No
Check the soldering between
IC1701 and IC1805, IC1806.
Yes
VDI0-7, VICLK
No
Check IC1805, IC1806 and its
peripheral circuits.
Yes
R1214
A_VCYOUT_EM
R1219
A_VCBOUT_EM
R1224
A_VCROUT_EM
No Check IC800 and its peripheral
circuits.
Yes
Replace the DIGITAL MAIN Assy.
No
Replace Q1202, Q1203, Q1204
and its peripheral parts.
Yes
A_VCYOUT
A_VCBOUT
A_VCROUT
No
Check the soldering and
connection of the CN1254.
Yes
7
8
A
B
C
D
NG
A_VCYOUT
A_VCBOUT
A_VCROUT
E
F
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