PDP-502MX
77
D408 Anode is
High/ High
between base &
emitter of Q416
D408 Anode is
High/ High
between base &
emitter of Q418
D408 Anode is
High/ High
between base &
emitter of Q421
D408 Anode is
High/ High
between base &
emitter of Q420
D408 Anode is
High/ High
between base &
emitter of Q435
D405 Anode is
High
High between
base & emitter
of Q111
D448 Anode is
High.
TP555 Hi
TP556 Hi
TP604 Hi
TP603 Hi
D4501 Anode is High.
D3457 Anode is
High.
K706Hi
K705Hi
K754Hi
K751Hi
VADR UVP
14V UVP
12V UVP
8V UVP
–8V UVP
B OVP
AC200V P.D.
VF OVP
5V OVP
5V UVP
3.3V OVP
3.3V UVP
AUDIO P.D.
12V OCP
VOFS OVP
VOFS UVP
VH OVP
VH UVP
When CN205 is disconnected,
P.D. occurs, and even when
RCC Control (B) Assy and OTL
Control (B) Assy are replaced,
P.D occurs.
When CN205 is disconnected,
P.D. does not occur.
When CN306 & 354 are
disconnected, P.D. occurs.
When CN306 is disconnected,
P.D. does not occur.
When CN354 is disconnected,
P.D. does not occur.
When VF D/D Converter Assy is
replaced, P.D. does not occur.
When CN355 is disconnected,
P.D. occurs.
When CN356 is disconnected,
P.D. does not occur.
When CN306 is disconnected,
P.D. occurs.
When CN306 is disconnected,
P.D. does not occur.
When CN306 is disconnected,
P.D. occurs.
When CN306 is disconnected,
P.D. does not occur.
AC power input is appropriate.
Output voltage of IC3456, 3457,
3458 are normal
Output voltage of IC3456, 3457,
3458 are abnormal.
Drive section (drive control signals
& drive signal output elements) in
normal operation.
VOFS D/D Conv. Block in normal
operation
Drive section (drive control signals
& drive signal output elements) in
normal operation.
VH D/D Conv.Block in normal
operation
MAIN POWER Assy
CABLE Assy
MAIN POWER Assy
14V D/D CONV. BLOCK
ANALOG VIDEO Assy
Y DRIVE Assy
IC5V D/D CONV. BLOCK
VF DD CONV. Assy
MAIN POWER Assy
12V D/D CONV. BLOCK
DIGITAL VIDEO Assy
D/D CONV. BLOCK
MAIN POWER Assy
8V D/D CONV. BLOCK
ANALOG VIDEO Assy
MAIN POWER Assy
–8V D/D CONV. BLOCK
ANALOG VIDEO Assy
MAIN POWER Assy
PFC BLOCK
MAIN POWER Assy
STB BLOCK
VF D/D CONV.Assy
DIGITAL VIDEO Assy
5V D/D CONV.BLOCK
DIGITAL VIDEO Assy
3.3V D/D CONV. BLOCK
AUDIO Assy
Y DRIVE Assy
VOFS D/D CONV. BLOCK
Y DRIVE Assy
VOFS D/D CONV. BLOCK
Y DRIVE Assy
SUS_MSK BLOCK
Y DRIVE Assy
VH D/D CONV. BLOCK
Y DRIVE Assy
VH D/D CONV. BLOCK
SCAN MODULE
IC301 • 302 • Q302
RCC Control (C) Assy • OTL
Control (C) Assy • IC351 • 352
IC852
IC503
RCC Control (C) Assy • OTL
Control (C) Assy • IC351 • 352
IC551 • 601 • Q554 • 555 • 604 • 605
RCC Control (C) Assy • OTL
Control (C) Assy • IC351 • 352
RCC Control (C) Assy • OTL
Control (C) Assy •
IC351
•
352
•
D373
IC131
IC111 • 112 • 113 • T111
IC502 • 503 • 504
IC551
IC601
IC4502 • C4520 • 4522
Pulse module
IC3454 • 3455 • 3459 • 3460
IC3461 • 3462 • 3463 • 3465 • 3451
• 3452 • 3453 • 3464
IC702 • 704
IC701 • 702 • 704
R3717 • 3730
IC751 • 752
IC751 • 752 • 755
SCAN IC
D407
D407
•
D443
D407
•
D441
D407
•
D439
The state of
circuit
P.D. circuit
in operation
Diagnosis Failure points
Estimated failure parts
Lighting
LED
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