Mitsubishi Electric LT-3280, Service Manual

Page: 41 / 60

MODELS: LT-3280D/LT-3780D
Page 41
3-2. 3-2.
3-2. 3-2. 3-2.
No each(L or R) of audio output generated. No each(L or R) of audio output generated. No each(L or R) of audio output generated. No each(L or R) of audio output generated. No each(L or R) of audio output generated.
3-3. 3-3. 3-3. 3-3. 3-3.
No HDMI audio output generated. No HDMI audio output generated. No HDMI audio output generated. No HDMI audio output generated. No HDMI audio output generated.
In case of no HDMI audio output generates, problem is in IC500 or IC302 or their peripheral Circuits.
Please exchange PWB-MAIN. PWB-MAIN. PWB-MAIN. PWB-MAIN. PWB-MAIN.
3-4. 3-4.
3-4. 3-4.
3-4.
No PC audio output generated. No PC audio output generated.
No PC audio output generated. No PC audio output generated. No PC audio output generated.
In case of no PC audio output generates, problem is in J304 or their peripheral circuits.
Please exchange PWB-MAIN.
PWB-MAIN.
PWB-MAIN. PWB-MAIN. PWB-MAIN.
3-5. When you turn up volume(over 50), there is noise from speaker 3-5. When you turn up volume(over 50), there is noise from speaker 3-5. When you turn up volume(over 50), there is noise from speaker 3-5. When you turn up volume(over 50), there is noise from speaker 3-5. When you turn up volume(over 50), there is noise from speaker.....
Please exchange the parts of PWB-MAIN PWB-MAIN PWB-MAIN PWB-MAIN PWB-MAIN as below.....
C37A and C38A : from 220
ƒÊ
F to 470
ƒÊ
F
C371 and C381 : from 0.47
ƒÊ
F to 0.1
ƒÊ
F
If PWB-CONNECT number is “211A77601”, please exchange this PWB-CONNECT to the PWB-CONNECT
that number is “ 211A84201”.
Enter audio input signal. ( ex. PC Audio)
YES
Is all harness connected correctly?
(Especially between PWB-MAIN and PWB-CONNECT(MA),
PWB-CONNECT and SPEAKER(SP))
NO Poor harness connection or
defective cable.
Problem is in IC370 or IC380 or their
peripheral circuits.
Please exchange
PWB-MAIN
It adjusts BALANCE to center. BALANCE level is center.
NO
YES