41
VSX-LX52
5
6
7
8
5
6
7
8
A
B
C
D
E
F
Step 7: COMPOSITE IN, HDMI OUT
CN1254 (Pin 3)
Is there a
signal?
No
Yes
A_VVYIN
Check CN1254 and diagnose
the COMPONENT Assy.
P
IC1701 (Pin 36) (side B)
Is there a
signal?
No
Yes
A_VVYIN
Check the soldering between
IC1701 and CN1254 and its
peripheral circuits.
IC1701 (Pins 2,5-8,59-62,
64),R1706 (side B)
Are the
signals output?
No
Yes
Q** RXHSYNC, RXVSYNC,
VOCLK
Check IC1701 and its peripheral
circuits.
IC1805 (Pins 3-9),
IC1806 (Pin 4) (side B)
Are the
signals output?
No
Q16-23
VICLK
Check IC1805, IC1806 and its
peripheral circuits.
Yes
To Step 8
C
Step 8: COMPONENT IN
COMPONENT
OUT
Perform the same check items up to
those for IC1701 and R1706 of Step 5-1.
R1214
Are there
signals?
No
NG
Yes
A_VCYOUT_EM
R1219
A_VCBOUT_EM
R1224
A_VCROUT_EM
Replace the DIGITAL MAIN Assy.
P
Q
Q
IC1805 (Pins 3-9),
IC1806 (Pin 4) (side B)
Are the
signals output?
No
Yes
Q16-23
VICLK
Note: When the connection is Composite S OUT, refer to the
diagnose of IC800 and later in steps 9 and 10.
Check the soldering between
IC1701 and IC1805, IC1806.
CN1254 (Pin 7)
Are there
signals?
No
Yes
A_VCYOUT
CN1254 (Pin 9)
A_VCBOUT
CN1254 (Pin 11)
Diagnose the COMPONENT Assy.
A_VCROUT
Check the soldering and
connection of the CN1254.
Check Q1202 and its peripheral circuits.
Check Q1203 and its peripheral circuits.
Check Q1204 and its peripheral circuits.
Are there
signals?
No
Yes
A_VCYOUT
A_VCBOUT
A_VCROUT
Replace Q1202, Q1203, Q1204
and its peripheral parts.
IC800 (through hole)
(Pins E13,D13,E12,D12,E11,
D11,E10,D10,D15) (side B)
Are there
signals?
No
Yes
VDI0-7, VICLK
Check IC1805, IC1806 and its
peripheral circuits.
Check IC800 and its peripheral
circuits.
DVC ON, Analog IN, OUT