19
TROUBLESHOOTING GUIDE
1. Process of diagnosing happening troubles
no
Yes, switch it on
no
yes
no
yes
no
no
Main power switched on
Check if power supply, infrared board, CPU
and peripherals (flash) and power line are in
trouble
Check if the 88
th
pin of CPU is square wave.
Check CPU peripherals, FLASH/SRAM
peripherals
Check if back light plate, 32th pin of CPU,
back light control has any problem
Video signals of various
channels are normal
Check if the input signal of this channel to
IC pin is normal. Or consider if IC and its
peripherals and LVDS output are normal
Audio signals of various
channels are normal.
Check if the channel input signal to IC pin is
normal. Or consider if
IC(MPS7720/MSP3410) and its peripherals
are normal
Is back lamp lit?
Indication lamp Yellow?
Indication lamp red?
Summary of Contents for BSV-2751
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