40
VSX-LX52
1
2
3
4
A
B
C
D
E
F
1
2
3
4
Step 5-2: Component IN, HDMI OUT (at 480i)
Q
P
Step 6: S IN, HDMI OUT
CN1253 (Pin 9)
Is the
voltage "H"?
No
Yes
SDET
Check CN1253 and diagnose
the COMPONENT Assy.
R
CN1254 (Pin 3)
Is there a
luminance
signal?
No
Yes
A_VVYIN
Check CN1254 and diagnose
the COMPONENT Assy.
IC1701 (Pins 34,46) (side B)
Are there
color and luminance
signals?
No
Yes
A_VVYIN, A_VSCIN
Check the soldering between
IC1701 and CN1253, 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)
Perform the same check items up to those
for IC1805 and IC1806 of Step 7.
Are the
signals output?
No
Yes
Q16-23
VICLK
Check IC1805, IC1806 and its
peripheral circuits.
CN1253 (Pin 7)
Is there a
color signal
?
No
Yes
A_VSCIN
Check CN1253 and diagnose
the COMPONENT Assy.
C
To Step 7
C
IC1801 (Pins 11-13),
IC1802, IC1803 (Pins 11-18),
IC1804 (Pin 4) (side B)
Are the
signals output?
No
Yes
PHSYNK, PVSYNK, PDE
P**
PCLK
Check IC1801 to IC1804 and its
peripheral circuits.
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 and IC1806 and its
peripheral circuits.
Check the soldering.
Check IC800 and its peripheral
circuits. Check the soldering.
R872-R875,R878,R879,
R884-R887
Is there a
signal?
No
Yes
VOD,VOCLK
Replace the DIGITAL MAIN Assy.
To Step 6
B
