ViewSonic PJ750 Service Manual - Page 19

ViewSonic PJ750 Manual

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No sound ) Check at operating mode Are signal input at these pins of EV01 on the NO PWB ass'y Main? YES © : Audio(L) : Audio(R) PWB ass'y Signal PWB ass'y Main Speaker Can not control to RS-232C ) Check at operating mode Pin No 1 RS-232C 2 3 6 SELO 7 RTS 9 A e the signals input at each pin of EV01 on the PWB ass'y Main? 10 12 13 14 NO GND RDP TDP YES : TXD O : RXD PWB ass'y Signal PWB ass'y Main ViewSonic Corporation 16 CONFIDENTIAL -- DO NOT COPY PJ750

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No
sound
)
Check
at
operating
mode
Are
signal
input
at
these
pins
of
EV01
on
the
PWB
ass'y
Main?
NO
YES
©
:
Audio(L)
:
Audio(R)
PWB
ass'y
Main
PWB
ass'y
Signal
Speaker
Can
not
control
to
RS
-232C
)
Check
at
operating
mode
A
e
the
signals
input
at
each
pin
of
EV01
on
the
PWB
ass'y
Main?
Pin
No
RS
-232C
1
2
3
6
SELO
7
RTS
9
10
GND
12
13
RDP
14
TDP
NO
YES
:
TXD
O
:
RXD
PWB
ass'y
Main
PWB
ass'y
Signal
ViewSonic
Corporation
16
CONFIDENTIAL
--
DO
NOT
COPY
PJ750