Pioneer VSX-LX52 Service Manual page 40

1
A
Step 5-2: Component IN, HDMI OUT (at 480i)
Perform the same check items up to those
for IC1805 and IC1806 of Step 7.
IC800 (through hole)
(Pins E13,D13,E12,D12,E11,
D11,E10,D10,D15) (side B)
B
No
Are there
signals?
Yes
R872-R875,R878,R879,
R884-R887
No
Is there a
signal?
Q
C
Yes
IC1801 (Pins 11-13),
IC1802, IC1803 (Pins 11-18),
IC1804 (Pin 4) (side B)
Are the
No
signals output?
Yes
D
B
To Step 6
E
F
40
1
2
C
VDI0-7, VICLK
Check IC1805 and IC1806 and its
peripheral circuits.
Check the soldering.
VOD,VOCLK
Check IC800 and its peripheral
circuits. Check the soldering.
Replace the DIGITAL MAIN Assy.
PHSYNK, PVSYNK, PDE
P**
PCLK
Check IC1801 to IC1804 and its
peripheral circuits.
2
3
Step 6: S IN, HDMI OUT
CN1253 (Pin 9)
Is the
voltage "H"?
R
Yes
CN1253 (Pin 7)
Is there a
color signal
?
Yes
CN1254 (Pin 3)
Is there a
luminance
signal?
P
Yes
IC1701 (Pins 34,46) (side B)
Are there
color and luminance
signals?
Yes
IC1701 (Pins 2,5-8,59-62,
64),R1706 (side B)
Are the
signals output?
Yes
IC1805 (Pins 3-9),
IC1806 (Pin 4) (side B)
Are the
signals output?
Yes
To Step 7
VSX-LX52
3
4
SDET
No
Check CN1253 and diagnose
the COMPONENT Assy.
A_VSCIN
No
Check CN1253 and diagnose
the COMPONENT Assy.
A_VVYIN
No
Check CN1254 and diagnose
the COMPONENT Assy.
A_VVYIN, A_VSCIN
No
Check the soldering between
IC1701 and CN1253, CN1254
and its peripheral circuits.
Q** RXHSYNC, RXVSYNC,
VOCLK
No
Check IC1701 and its peripheral
circuits.
Q16-23
VICLK
No
Check IC1805, IC1806 and its
peripheral circuits.
C
4