60
PDP-5020FD
1
2
3
4
A
B
C
D
E
F
1
2
3
4
[6] VIDEO SYSTEM
Flowchart of Failure Analysis for The Video System
Is the input selecter set to TV?
(Analog)
Set the Input selector to TV.
(Analog)
No
No
Check the 40P FFC (J214) between MAIN Assy and IO
Assy. If there was problem, replace it.
No
Check around IC8001 and check the communications
between IC8001 and microcomuputer.
If there was no ploblem, replace the IO Assy.
Check around IC4702 and check the communications
between IC4702 and microcomuputer.
If there was no ploblem, replace the MAIN Assy.
No
Check around the IC that is found to have failure in
communication and the microcomputer.
If there was no ploblem, replace the MAIN Assy.
No
No
No
Replace the MAIN Assy.
Yes
Yes
Analog tuner signal is not
displayed on the screen.
=> ATV
Is a signal input to IC8001
(AVSW)? (pin 57)
Has the signal arrived at TP5337?
No
Replace the U5301 (TUNER).
Is a signal input to TP7558?
No
Check the 40P FFC (J214) between the MAIN Assy and IO Assy.
If there was problem, replace it.
Yes
Which signal is not output,
main or sub signal?
Is a signal output from IC8001?
(AVSW) (pin 45)
Are the data output from IC4702?
(VDEC) (pins 93 to 97, 99 to 104,
107 to 109)
Yes
Has the signal arrived at IC4702?
(VDEC) (pin 22)
Yes
Yes
Yes
Is the communication between
each IC (VDEC, ASIC) on the
MAIN Assy and the microcomputer
normal?
Yes
Has the signal arrived at IC4702?
(pin 70)
Yes
MAIN
SUB
1
No
Is a HS signal input to IC6811
(IFUCOM)? (pin 3)
Has the signal arrived at Q5306
collector?
Has the signal arrived at C5363.
No
No
Replace the U5301 (TUNER).
Yes
2
4
5
4
No
No
Are the data output from IC4702?
(pins 79 to 86, 88 to 90)
Yes
5
Is a signal output from IC4601?
(pin 49)
3
3
2
IC6811 - pin 3
V: 1 V/div H: 10
μ
sec/div
1
IC8001 - pin 57 (in)
V: 500 mV/div H: 10
μ
sec/div
3
IC8001 - pins 45, 49 (out)
V: 500 mV/div H: 10
μ
sec/div
4
IC4702 - pins 22, 70
V: 500 mV/div H: 10
μ
sec/div
5
IC4702 (out)
V: 1 V/div H: 2
μ
sec/div
Waveforms
Input signal: NTSC Color-bar (Analog tuner)
Содержание ARP3476
Страница 10: ...10 PDP 5020FD 1 2 3 4 A B C D E F 1 2 3 4 2 2 SPECIFICATIONS ...
Страница 11: ...11 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 12: ...12 PDP 5020FD 1 2 3 4 A B C D E F 1 2 3 4 2 3 PANEL FACILITIES Front Section ...
Страница 13: ...13 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F Rear Section ...
Страница 14: ...14 PDP 5020FD 1 2 3 4 A B C D E F 1 2 3 4 Remote Control Unit ...
Страница 15: ...15 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 21: ...21 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 22: ...22 PDP 5020FD 1 2 3 4 A B C D E F 1 2 3 4 4 BLOCK DIAGRAM 4 1 OVERALL WIRING DIAGRAM 1 2 ...
Страница 25: ...25 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F OVERALL DIAGRAM PDP 5020FD ...
Страница 31: ...31 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 71: ...71 PDP 5020FD 5 6 7 8 5 6 7 8 A B C D E F ...
Страница 192: ...192 PDP 5020FD 1 2 3 4 A B C D E F 1 2 3 4 9 6 PANEL CHASSIS SECTION ...