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Trouble-Shooting - Hitachi HDR081 Service Manual

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SERVICE MANUAL

TROUBLE-SHOOTING

FAULTY SUPPLY/
DO NOT OPEN/
DO NOT INIT
NO VIDEO/
BAD VIDEO IMAGE
NO A DIO/
U
BAD AUDIO& PARASITIC
1
) Control the 3,3V,5V,12, supply voltages from the PL451 connector
2
)Control the frequency of the 27MHz X25 crystal.
3)Control the frequency of the 133Mhz from the S11
4
) Control the IC600 RESET IC 5V supply voltage .After power on the
device , RESET IC output must be high in 200ms.
1
.2V must be seen on the C600 reset pin.
5)Control the R187 , R188 , R189, R195 I2C lines.
6
)Control the HDD , remove the HDD power cable and control if there is
a Sc or not on the HDD .The resistor value between 5V to GND is near
4Kohm.
7
)Control that all cables are connected between the boards.(AVcable,
power cable ,HDD data cable
1
) Control the TV scart pins.
2) Control the IC200 supply voltages and SDA&SCL lines.
3) Control the video signals on the PL200& PL304 connectors.
1
)Control all audio output from the SCART AUDIO OUTPUTS.
2
)Control the IC200 supply voltages and SDA&SCL lines.
3) Contol the
capacitors C226& C227 on the Av board.
4
) Control the signal from the point of C143 C144 capasitors on the
mainboard.
5) Control dc signal on the C143 C144 capasitors on the mainboard.
Page 28
)
6 point.
ly

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