Pioneer VSX-LX52 Service Manual page 42

1
A
Step 9: S IN, S OUT
Note: When the connection is Composite OUT and Component OUT,
refer to the diagnose of IC800 and later in steps 8 and 10.
Perform the same check items up to
those for IC1805 and IC1806 of Step 6.
IC800 (through hole)
(Pins E13,D13,E12,D12,E11,
D11,E10,D10,D15) (side B)
B No
Are there
signals?
Yes
R1203
R1209
No
Are there
signals?
Q
Yes
C
Q1200 Emitter
Q1201 Emitter
No
Are there
signals?
Q
Yes
D
CN1252 (Pin 1)
CN1252 (Pin 3)
No
Are there
signals?
S
Yes
To Step 10
E
F
42
1
2
VDI0-7, VICLK
Check IC1805, IC1806 and its
peripheral circuits.
A_VSYOUT_EM
A_VSCOUT_EM
Check IC800 and its peripheral
circuits.
NG
Replace the DIGITAL MAIN Assy.
Check Q1200, Q1201 and
its peripheral parts.
A_VSYOUT
A_VSCOUT
Check the soldering and
connection of the CN1252.
2
3
Step 10: COMPOSITE IN, COMPOSITE OUT
(at DVC ON)
Note: When the connection is S Component OUT,
refer to the diagnose of IC800 and later in steps 8 and 9.
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)
Are there
signals?
Yes
R1214
Is there a
signal?
Q
Yes
Check Q1202 and its peripheral circuits.
Is there a
signal?
Q
Yes
CN1254 (Pin 11)
Is there a
signal?
P
Yes
Diagnose the COMPONENT Assy.
Step 11: GUI/JPEG (USB)
Composite/S/Component OUT
Diagnose the IC800 (through hole) of Composite/S/
Component OUT and later.
Step 12: GUI/JPEG (USB)
HDMI OUT
C
Go to
VSX-LX52
3
4
VDI0-7, VICLK
No
Check IC1805, IC1806 and its
peripheral circuits.
A_VCYOUT_EM
No
Check IC800 and its peripheral
circuits.
NG
Replace the DIGITAL MAIN Assy.
A_VCYOUT
No
Replace Q1202 and its peripheral
parts.
A_VCYOUT
No
Check the soldering and
connection of the CN1254.
.
4