Pioneer PDP-V402, Service Manual

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PDP-V402
154
Measurement Points
VADR (60V) (TP3401) –– ADR. GND (TP3402) If normal, LED (D3405) lights.
VSUS (170V) (TP3301) –– SUS. GND (TP3302) If normal, LED (D3305) lights. (which displays the timing of VCC and VSUS)
POWER ON: lights in red (VCC ON)
=
lights in yellow (VSUS ON) at 1–2sec
POWER OFF: lights in yellow
=
lights in red at 1–2sec
=
LED OFF
(VSUS OFF earlier than VCC OFF)
abnormal POWER OFF: lights in yellow
=
lights in green
=
LED OFF
(VCC OFF earlier than VSUS OFF)
VOFS (140V) (TP3601) –– OFS.GND (TP3602)
+B (215V) (TP3101) –– P. GND (TP3102)
VCP (12V) (TP3203) –– CP. GND (TP3204)
+13.5V (TP3205) –– A. GND (TP3206)
VCC (5V) (TP3201) –– D. GND (TP3202) If normal, LED (D3205) lights.
7.1.2 TROUBLESHOOTING
1. MAIN POWER ASSY
Check the power supply voltages.
MAIN POWER ASSY
TP3301
(VSUS)
TP3302
(SUS. GND)
TP3402
(ADR. GND)
TP3204
(CP. GND)
TP3206
(A. GND)
TP3203
(VCP)
TP3803
FAN P. D.
TP3802
TP3602
(OFS. GND)
TP3202
(D. GND) TP3205
(+13.5V)
TP3201
(VCC+5V)
TP3401
(VADR)
D3405
D3205
D3305
TP3101
(+B)
TP3102
(P. GND)
TP3601
(VOFS)
TOP
SUB POWER ASSY
TP1603
(+40V)
SP2
TP1604
(CSP. GND)
SP3
SP5
SP6
[Precautions for servicing]
1. As the P.D. circuit starts operating when the rear cover is
removed and the CN5801 connector of the FAN RELAY
ASSY is disconnected, short between TP3802 and TP3803.
2. For normal signals, set the rear selection SW S1201 (INPUT
CONTROL ASSY) to OFF. When G on sync signals are
output by Mac, set the switch to ON to prevent overlapping
of the sync. signal.
2. SUB POWER ASSY
Check the power supply voltages.
VCSP (40V) ..... TP1603 CSP. GND ........... TP1604
+12V – YVSUS/2 SP2
=
Y DRIVE (A) ASSY
+12V – XVSUS/2 SP2
=
X DRIVE (A) ASSY
+12.5V – GND SP3
=
CONTROL ASSY
+12.5V – GND SP5
=
ANALOG VIDEO ASSY
+12.5V – GND SP6
=
INPUT CONTROL ASSY
Note: Take note that the CSP. GND differs from the GND
potential of the unit.