Christie D Series Service Manual page 22

Focus or zoom adjustment cannot be operated.
any dust or
distortion in the BtoB
connectors on the ADAPTER
PCB and LENS
ADAPTER PCB.
OK
Re-
attach the
LENS and measure
the resistance* between pins
(7) and (8) of EM02
on the MAIN
PCB.
Open
Replace the LENS ADAPTER PCB.
or
Replace the ADAPTER PCB.
No sound
(Make sure the state of MUTE , Volume and SPEAKER setting)
Disconnect
the speaker from the
PWB assembly Main and
measure its
resistance.
about 16
PWB assembly Main
LWU720i/LHD720i/LWU620i Service Manual
LWU720i / LHD720i / LWU620i
*: Be sure to unplug the power cord before measuring resistance.
Clean the connectors with air duster.
NG
or
Replace the LENS ADAPTER PCB.
Try
0
whether changing
problem.
Replace the LENS.
infinity
Speaker
PWB assembly INPUT
NO
Replace MAIN PCB.
YES
21