Troubleshooting Guide - Prima LC32M5S Service Manual

Troubleshooting guide

1. Process of diagnosing happening troubles
Main power switched on
Yes, switch it on
Indication lamp Yellow?
Video signals of various
Audio signals of various
Indication lamp red?
yes
Is backlight lamp lit?
yes
channels are normal
channels are normal.
Check if power supply, infrared board, CPU
no
and peripherals (flash) and power line are in
Check if the 88
no
Check CPU peripherals, FLASH/SRAM
Check if backlight plate, 32nd pin of CPU,
no
back light control has any problem
Check if the input signal of this channel to
IC pin is normal. Or consider if IC and its
no
peripherals and LVDS output are normal
Check if the channel input signal to IC pin is
normal. Or consider if IC
no
(MPS7720/MSP3410) and its peripherals are
18
trouble
th
pin of CPU is square wave.
peripherals
normal