JVC 330 Service Manual page 153

Problem and
Symptom to
Check
Data lost when
projector is
turned off and
back on.
"Flagwaving" at top
of picture or top
of image is
skewed.
Convergence and/or
shading is
incorrect after
doing copy
channel.
Red bands across
image after
channel change.
Communication
error.
Check hardwired
cable for broken
wires and/or if
wired for RS-
232 null modem.
Bad RS-232
interface port on
the System
Controller.
Board.
LCD displays
erroneous
characters.
Infrared I/R
Remote
No response.
5-13
Possible Solution
SCB socket batteries weak. "RAM
BATTERY LOW" may appear
on screen.
VCR mode (if using CVID or SVID
input).
Select 2H Sync Enable or
Shift Sync Enable from the
Menu.
Menu Position adjustment for the
"Copied to" channel.
Channel data not loading properly.
Upgrade software.
Unplug tethered remote at the
projector
and reconnect.
Bad RS-232 null modem cable.
Replace System Controller Board.
Unplug tethered remote at projector
and reconnect.
Set I/R remote dip switch settings.
Model 330, 340SC, and 370SC Service Manual
Chapter 5---Troubleshooting
Service Operator
Manual Manual
4.14
5.3 Table 5-4
4.11
5.8