Christie DS Series Service Manual page 27

Cannot communicate via RS-232C.
Is
STANDBY
MODE set to "POWER
SAVE" or "NETWORK-
WOL"?
YES
Set STANDBY MODE as
"NORMAL" or "QUICK START"
in the SETUP menu.
The check after parts change:
1. PC power supply OFF
2. Connection of cable
3. Projector starting
4. PC starting
* When not operating: PC set up change or cable change.
LWU900-DS/LHD878-DS/LWU755-DS
Service Manual
LWU900-DS / LHD878-DS / LWU755-DS
Are pins (2)
NO
and (3) of the RS-232C
cable crossed?
YES
Are the
signals on each pin of the
cable?
YES
Replace MAIN PCB.
or
Replace INPUT PCB.
26
NO
Use cross cable.
NO
Check your PC setup.
(2): RX
(3): TX
020-001586-01 Rev. 1 (02-2021)
LIT MAN SERV DS Series