PDP-4271HD
93
5
6
7
8
5
6
7
8
C
D
F
A
B
E
No
No
No
No
No
No
NG
Replace the MAIN Assy.
NG
Replace the MAIN Assy.
NG
Replace the MAIN Assy.
NG
Replace the MAIN Assy.
NG
Replace the MAIN Assy.
NG
Replace the MAIN Assy.
NG
Replace the MAIN Assy.
Yes
Yes
Yes
Yes
Yes
Has the sound been emitted from
the speakers?
Is a signal output from IC6301and
come to CN4007?
Yes
Yes
Is a signal come to AUDIO Assy?
Is a sound output from
AUDIO Assy?
Yes
Yes
Yes
Check the speakers and speaker
cables.
Is a signal input to IC4401?
(pin 1, 8)
Check the communication
between IC4402 and IC4701.
Is a signal input to IC4402?
(pin 21)
Has the sound of the digital channel
broadcasting (ANT-A) output?
Has the sound of the Analog channel
broadcasting (ANT-A,B) output?
⇒
AU1
Is sound muting set?
Is the volume set to 0?
Is a picture displayed?
Check the communication
between CN4007 and IC6301.
No
No
Check the cables and connector
between MAIN and AUDIO Assys.
If it's no problem, replace audio
signal cable.
Check the communication
between AUDIO Assy and the
microcomputer. If it's no problem,
replace AUDIO Assy.
No
Check the communications around
the FE (U4401 or U4402) and
between the FE (U4401 or U4402)
and the microcomputer.
No
Check the communications around
the IC4402 and between the IC4402
and the microcomputer. If there was
no ploblem replace IC4402.
No
Check around IC4402 and check
the communications between
IC4402 and the FE.
Check digital channel broadcasting.
Cansel muting then check again.
Yes
Raise the volume then check again.
No sound from panel
33
Yes
Yes
Yes
Is a signal output from IC4402?
(pin 29, 30)
34
Yes
No
Check the communication
between IC4701 and IC7102.
Check arround IC7102.
No
Check the communication between
IC7102 and IC7101. If there was
no ploblem replace IC7102.
No
Check the communication between
IC6301and IC7101. If there is no
problem, replace IC7101.
No
Check the communication between
CN4007 and IC6301. If there is no
problem, replace IC6301.
No
Check around IC4701 and check
the communications between
IC4701 and the microcomputer.
No
Is a signal input to IC4701?
(pin 19, 20)
Is a signal output from IC4701?
(pin 35, 36)
Is a signal output from IC7102?
(pin 1, 7)
35
36
Is a signal come to IC7101?
(pin 1, 2)
Yes
Is a signal come to IC6301?
37
Yes
Is a signal output from IC6301 and
come to CN4007? (pin 3, 5)
Yes
38
b
c
a
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 ...