Trouble Shooting
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Examination & Reparation for Remote Control Receive system
To test the power feet of Ir1 receive
head in front control board is ok or
not with multimeters, feet 3 of IR1
receive head is +5V, feet2 is ground,
feet 1 is control code output
To measure feet one of IR1 receiver head
is with remote control signal or not?
To measure feet 76 on IC (U8 C1610)
on decode board is with remote signal
input or not?
To examine and repair IC(C1610)
¡¯
s
peripheral device, re-weld not-good
position or replace IC(C1610)
Examine and 5V power
supply circuit
Replace IR1 receive head
Connect feet 1 of IR1 receive
head to feet 76 of IC (C1610),
maybe it is with resin connection
or contact miss or cutoff
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Start
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Examination & Reparation Procedure for Power
To measure the voltage of feet 2 and 4
and 6 and 8 of JP203 jacket, the voltage
is +5v, +5v, +3.3v and +9v respectively.
To measure the voltage of DC300v
of after rectified filter is stable or not?
Examine and repair U8, In(C1610)
¡¯
s
peripheral device, re-weld abnormal
place or replace IC(C1610).
To measure feet 3 and 4 of IC(U201), feet
3 is power feet, which is provided from feet
4 and 5 with rectifier, please measure D206,
C210 and R203, the voltage of feet 4 is
provided by constant power, please measure
R204, C211, U205 and constant voltage
circuit device, re-weld the abnormal place.
With 3.3v, w5v, please check
U207
¡¯
s 3.3v constant-power block
and filter capacitor of C207 and C208
or short circuit of 3.3v output for
ground; without 9v, with +12v voltage,
please check 9v constant-power block
of U203, and filter wave capacitor of
C207 and C204, or short circuit of 9v
output to ground
To check the status connect line,
the filter circuit on decode board
is short circuit or not
To check F201 fuse is ok or not?
Change fuse, fuse is blown when
starting player.
Check D201, D202, D203, D204,
C209, C201, C202, R207, U201,
make sure there is any open circuit
and short circuit or not?
Re-weld abnormal places,
replace bad device, turn
on the power, DC300V
voltage is stable
Change T201
transformer
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DVDP480
