ViewSonic PJ870 Service Manual - Page 60
Audio, Troubleshooting, Remote, Control
UPC - 766907376319
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P3870 6-2.4 D. Audio Troubleshooting Start Can hear sound ? Yes Change No Main board Change Speaker Sound is clear without noise ? Yes ( End ./ Change Speaker 6-2.5 E. Remote Control Troubleshooting ( Start ViewSonic Corporation Replace the battery Yes Change Remote Controller Yes Change Keypad Yes Change MB [ 6-7 ] End Confidential - Do Not Copy
P3870
6-2.4
D.
Audio
Troubleshooting
Start
Can
hear
sound
?
Yes
Sound
is
clear
without
noise
?
Yes
(
End
./
Change
No
Change
Main
board
Speaker
Change
Speaker
6-2.5
E.
Remote
Control
Troubleshooting
(
Start
Replace
the
battery
Yes
Change
Remote
Controller
Yes
Change
Keypad
Yes
Change
MB
End
[
6-7
]
ViewSonic
Corporation
Confidential
-
Do
Not
Copy