Sharp DV-NC55S - Page 41

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DV-NC55S/H DV-NC60H
FLOW CHART NO.6
Is the focus control signal output from the pin(158)
of IC701?
Check the pins(10) and (11) of IC701 periphery
circuit. If it is normal, replace IC701.
Check the line between the IC7701 and the focus
actuator.
Check AT 8V line.
Is 8V voltage applied to the pin(8) of IC7701?
Check the pin(21) of IC7701 and replace IC7701.
Is the focus control signal from the pin(158) of
IC701 input into the pin(23) of IC7701?
Check the focus control signal line between
the IC7701 and IC701.
Is the focus control drive voltage output from the
pins(17) and (18) of IC7701?
Is the focus control drive voltage applied to the
terminal of focus actuator?
Check the connection of optical pickup cable.
If it is normal, replace the traverse chassis unit.
FLOW CHART NO.7
Check the A_5V line.
Is the Q303(LD POWER CTL) drive output to the
pin(46) of IC301? (Checking of symptom.)
Is 5V voltage applied to the emitter of Q303?
Is approx. 2V applied to the pin(3) of the pickup
terminal? (See note.)
Check the connection of optical pickup cable.
If it is normal, replace the traverse chassis unit.
Check the line between the Q303 and pickup
terminal.
Check the line between the pin(46) of IC301 and
the base of Q303.
FLOW CHART NO.8
Check the loading switch.
Check for contamination of objective lens of
optical pickup.
Replace traverse chassis unit.
Do you have done disk loading by normality?
See FLOW CHART NO.9 and NO.10.
Set the disc on the disc tray.
Replace the main PWB unit.
Is the level of RF signal which is output from
pins(29), (30) of IC301, normal?
No
No
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
The [No Disc] indication. (In case focus servo does
not function.)
The [No Disc] indication. (When the laser beam
does not light.)
Both picture and sound do not operate normally.(1)
Note: Since the laser diode is very susceptible to static
electricity, be careful of static electricity or electricity
leak from the measuring equipment when confirming
the voltage.
FLOW CHART NO.9
Check the PC 5V line.
Set the disc on the disc tray.
Are the video signals outputted to the pins of main
unit connector CN802, CN803?
CN803 1PIN CVBS/Y
CN802 3PIN Y/CR
CN802 5PIN C/CB
Check the main unit.
(IC601, Q201, Q202, Q203 periphery circuit.)
Check the parts C2003, C2007, C2008 and the
lines between them.
No
No
No
No
No
Check parts C2016, Q2002 periphery circuit and the
line between them.
No
Check the line between pin(7) of IC2004 and pin(6)
of IC1206.
Check C1201, C1206, Q2003, Q2002 periphery
circuit and the lines between them.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Picture do not operate normally.
Are the video signals shown above input into
the pins of IC2001?
IC2001 2PIN CVBS
IC2001 11PIN S-Y
IC2001 4PIN S-C
Are the video signals shown above input into
the pins of terminal?
IC1206 6PIN CVBS
IC1201 6PIN S-Y
IC1202 6PIN S-C
Are the video signals outputted into the pin of
terminal?
IC1206 2PIN CVBS
IC1201 2PIN S-Y
IC1202 2PIN S-C
Are the video signal outputted to each pins of
IC2001?
IC2001 27PIN CVBS
IC2001 18PIN S-Y
IC2001 25PIN S-C
Is 5V applied to the pins(1) and (28) of IC2001?
Replace IC2001.
No
No
No
No
Yes
Yes
Is 5V applied to the pin(6) of IC2004?
Replace IC2004.
Check the DVD_H line.
Are the DVD_H line at pin(2) of IC2004 on "L"
level?
Yes
Replace IC1201, IC1202 and IC1206.
Is 5V applied to the pin(3) of IC1201, IC1202 and
IC1206.
No
No
No
No
No
Are the video signals shown above outputted into
the pins of output terminal?
Are the composite video signals outputted to the
VIDEO OUT terminal (J1202)?
Are the luminance signals outputted to the
S-OUT terminal (J1201)?
Are the chroma signals outputted to the
S-OUT terminal (J1201)?
Are the CVBS video signal shown above input
into the pin of terminal?
IC2004 1PIN CVBS
Check the VIDEO OUT terminal (J1202) and the
line between the pin(2) of IC1206 and the VIDEO
OUT terminal (J1202).
Check the S-OUT terminal (J1201) and the line
between the pin(2) of IC1201 and the S-OUT
terminal (J1201).
Check the S-OUT terminal (J1201) and the line
between the pin(2) of IC1202 and the S-OUT
terminal (J1201).
Are the video signal outputted into the pin of
terminal?
IC2004 7PIN CVBS
Yes