Roadstar DVR-9100, Руководство по обслуживанию, Страница: 24 / 76

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TROUBLE SHOOTING
6. FUNCTION TEST
A. Image can’t stop or mute, fast forward and fast forward key don’t function
Image function
error
If the machine is functioning
normally, check the battery in the
remote control. Change the battery
if necessary.
Check U34 and any
components nearby for bad
replace it with a working
F/W, check if the machine
will function normally.
Remove F/W (U25) and
replace it with a working
F/W, check if the machine
will function normally.
Check IR receiver U3 and
any resistors near U3 for
bad soldering, open/short
circuit, damage, etc.
Check the 12pin cable that
connects the front board with
the main board, check if the
cable is properly connected.
OK
Replace main board
Replace front board
No
Yes
No
Yes