Hitachi DV-P588A, Руководство по обслуживанию

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3-3
FLOW CHART NO.14
No operation is possible from the remote control unit.
Operation is possible from the DVD, but no
operation is possible from the remote control unit.
Replace the infrared remote control receiver (RM2001).
Or replace the remote control unit.
Check the line between Pin(1) of the infrared
remote control receiver (RM2001) and Pin(22) of
CN1001, and service it if detective.
Is the "L" pulse sent out Pin(1) terminal of receiver
(RM2001) when the infrared remote control is activated?
Is the "L" pulse signal supplied to the Pin(22) of
CN1001?
Replace DVD Main CBA.
Yes
Yes
Is 5V voltage supplied to the Pin(3) terminal of
the infrared remote control receiver (RM2001)?
Yes
No
Check EV+5V line and service it if detective.
No
No
Yes
No
FLOW CHART NO.13
The key operation is not functioning.
Are the contact point and the installation state of the
key switches (SW2002, 2003, 2005-2008) normal?
When pressing each switches (SW2002, 2003,
2005-2008), do the voltage of each pin
of IC2001 (shown below) switch to 75mV from
6mV?
SW2002, 2006, 2008 : IC2001 3PIN
SW2003, 2005, 2007 : IC2001 4PIN Check the switches (SW2002, 2003, 2005-2008)
and their periphery, and service it if detective.
No
Re-install the switches (SW2002, 2003,
2005-2008) correctly or replace the poor switch.
Replace IC2001.
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
FLOW CHART NO.12
The fluorescent display tube does not light up.
Is 3.3V voltage supplied to Pin(6) and
Pin(24) of IC2001?
Is the voltage of approximately -24V to -28V
supplied to Pin(15) of IC2001?
Is there 500kHz oscillation at Pin(26) of IC2001?
Are the filament voltage supplied between
Pins(1, 2) and Pins(34, 35) of the fluorescent
display tube? And the negative voltage applied
between these pins and GND?
Replace the fluorescent display tube.
Check the EV+3.3V line and service it if detective.
Check the -FL (-28V) line and service it if detective.
Check R2015, IC2001 and their periphery, and
service it if detective.
Check D1016, D1017, R1079, C1018, and their
periphery, and service it if detective.