PDP-4271HD
95
5
6
7
8
5
6
7
8
C
D
F
A
B
E
33
IC4402 - pin 21
V: 50 mV/div H: 200 nsec/div
34
IC4402 - pin 29, 30 (AC)
V: 200 mV/div H: 400
µ
sec/div
35
IC4701 - pin 19, 20 (AC)
V: 100 mV/div H: 400
µ
sec/div
36
IC4701 - pin 35, 36 (AC)
V: 100 mV/div H: 400
µ
sec/div
37
IC7101 - pin 1, 2 (AC)
V: 100 mV/div H: 400
µ
sec/div
38
IC4007 - pin 3, 5 (AC)
V: 100 mV/div H: 400
µ
sec/div
Waveforms
Input signal: 1kHz
Sound volume is fixed to 25.
Is the power-supply voltage of
CN4002 normal?
Check between CN4002 and
P8 (POWER SUPPLY Unit).
No
Check between IC6301 and
IC7201. Exchange IC6301 if there
is no problem.
No
Check between IC8401 (pin 102,
103) and IC6301 (pin 305, 406).
Exchange IC6301.
No
NG
Replace the MAIN Assy.
Yes
Is the signal from IC6301 to
IC7201?
Yes
Is the signal input from IC7201 to
IC8001?
Yes
Has the symptom been settled
when the MAIN Assy is replaced?
Yes
When power ON, is RESET_DT
(IC8401 - pin 159) Low after
D+3.3V standing up?
Check around IC6902.
No
The panel is defective.
No
Yes
Check between IC7201 and
IC8001. Exchange IC6301 if there
is no problem.
No
Do you communicate by TXD_DT
(IC8401: 103) and RXDDT
(IC8401: 102)?
Yes
Yes
DTV (Digital Terrestrial Video)
doesn't operate.
⇒
DTV
DTV doesn't work
Finishing troubleshooting.
Flowchart of Failure Analysis for The Audio System
Содержание PDP-4270HD
Страница 20: ...PDP 4271HD 20 1 2 3 4 1 2 3 4 C D F A B E 2 6 PANEL CHASSIS SECTION 1 2 3 6 4 5 8 8 8 8 8 8 9 13 7 10 12 11 14 ...
Страница 55: ...PDP 4271HD 55 5 6 7 8 5 6 7 8 C D F A B E ...
Страница 189: ...PDP 4271HD 189 5 6 7 8 5 6 7 8 C D F A B E Block Diagram R2S11002AFT MAIN ASSY IC4701 AV SW ...
Страница 190: ...PDP 4271HD 190 1 2 3 4 1 2 3 4 C D F A B E Block Diagram R2S11001FT MAIN ASSY IC4901 Component SW IC ...