Sharp DV-NC65H (serv.man6) Service Manual ▷ View online
60
DV-NC65H/S
DV-NC70H
DV-NC70H
(D
VD)
FLOW CHART NO.1
Is the supply voltage of 5V fed up to pin(37) of
IC8051?
Check the STBY 5V line.
Is the supply voltage of 3.4V, 1.7V fed up to pin
(38), (39) of IC8051?
Check the pins(38) and (39) of IC8051 and their
periphery circuit.
Check the signal lines of LCD RESET, LCD CS,
LCD DATA, LCD CLK on pins(36), (42), (43), (44)
of IC8051.
Check signal line of LCD RESET, LCD CS, LCD
DATA, LCD CLK on pins(6), (12), (8) (10) of IC801.
Is the OSC signal present on pin(41) of IC8051?
Check periphery circuit of pin(41) of IC8051.
Are common and segment signals supplied from
IC8051 (LCD driver IC) to LCD8052 (LCD)?
Replace IC8051.
Check that the flourescent display tube is free from
damages.
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Check signal line between IC3501 and IC801.
Check signal of LCD RESET, LCD CS, LCD DATA,
LCD CLK on pins(5), (13), (9), (11) of IC801.
Yes
Check the signal lines between IC801 and IC8051.
Check or replace IC801.
The fluorescent display tube does not light.
No
No
FLOW CHART NO.2
Is key switch contact and installation state normal?
Replace key switch.
Is the control voltage normally into the pins(72),
(73) of IC3501?
No
Yes
The key operation is disabled.
KEY-1/2
3.3V
2.5V
1.8V
0.9V
0V
KEY
–
2
KEY
–
1
OFF
SW8053
STOP
SW8052
PLAY
Check AT 5V line.
Replace the remote control receiver.
FLOW CHART NO.3
Operation is possible from the DVD, but no
operation is possible from the infrared remote
control.
Replace the remote control receiver or replace the
remote control transmitter if necessary.
Is 5V voltage supplied to the pin(3) terminal of
remote control receiver?
Check the line between the remote control receiver
and the pin(42) of IC3501.
Is the "L" pulse sent out from pin(1) terminal of receiver
when the infrared remote control is activated?
Is pulse signal supplied to the pin(42) of IC3501?
Replace IC3501.
No
No
No
No
Yes
Yes
Yes
Yes
No operation is possible from the infrared remote control.
FLOW CHART NO.4
Is the LOAD signal inputted to R3763?
Check pin(61) of IC3701. Check LOAD signal line
between IC3701 and IC3704.
Check IC3704.
Check for mechanism and gear engagement and breakage.
Is loading motor drive voltage outputted from the
pins(11) and (12) of IC3704?
Is the loading motor drive voltage applied to the
terminal of loading motor?
Check the line between the IC3704 and the
loading motor. Check CN3702.
No
No
No
Replace IC3704.
Yes
Yes
Yes
Yes
The disc tr
a
y
cannot be opened and closed.
No
Is FE signal inputted into the pin(117) of IC3701?
Check or replace IC3701.
Check the line between the IC3301 and IC3701.
FLOW CHART NO.5
Does the optical pickup move up and down after
the disc is removed? (Checking of symptom.)
See FLOW CHART NO.6. <The [No Disc] indication.
(In case focus servo does not function.)>
Replace IC3301.
Is there input signal on the pins(49), (50), (51), (52)
of IC3301?
Is FE signal outputted from the pin(22) of IC3301
when the disc is set?
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup.
No
No
Yes
No
Yes
Yes
Yes
The [No Disc] indication.
(In case of f
ocus error)
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DV-NC70H
DV-NC70H
FLOW CHART NO.6
Is the focus control signal outputted to the pin(115)
of IC3701?
Check the pin(118) of IC3701 DAC power source
periphery circuit. If it is normal, replace IC3701.
Check the line between the IC3704 and the focus
actuator. Check CN3301.
Check M 8V line.
Is 8V voltage applied to the pin(22) of IC3704?
Check the pin(21) of IC3704 and replace IC3704.
Is the focus control signal from the pin(115) of
IC3701 inputted into the pin(23) of IC3704?
Check the focus control signal line between
the IC3701 and IC3704.
Is the focus control drive voltage outputted from the
pins(1) and (28) of IC3704?
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.
No
No
No
No
Yes
Yes
Yes
No
Yes
Yes
The [No Disc] indication.
(In case f
ocus ser
v
o
does
not function.)
FLOW CHART NO.7-1
Check the S 5V line.
Is the control signal outputted from the pin(2) of
IC3301?
Is 5V voltage applied to the emitter of Q3304?
Is approx. 2V applied to the pin(21) 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 Q3301, Q3302 and
Q3304.
Check or replace IC3301.
No
No
No
Yes
Yes
Yes
The [No Disc] indication dur
ing D
VD pla
ybac
k.
(When the laser beam does not light.)
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.7-2
Check the S 5V line.
Is the control signal outputted from pin(4) of IC3301?
Is 5V voltage applied to the emitter of Q3303?
Is approx. 2V applied to the pin(3) of CN3301?
Check the connection of optical pickup cable.
If it is normal, replace the traverse chassis unit.
Check the line between the Q3301~Q3303.
Check or replace IC3301.
No
No
No
Yes
Yes
Yes
Yes
The [No Disc] indication dur
ing CD pla
ybac
k.
(When the laser beam does not light.)
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.8
Check the loading switch.
Check for contamination of objective lens of
optical pickup.
Replace traverse chassis unit.
Do you have loading done the disk 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 outputted from
pin(31) of IC3301 normal?
No
No
No
Yes
Yes
Yes
Yes
Both picture and sound do not oper
ate nor
mally
.(1)
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 CN3202?
CN3202 1pin S-Y/COMP
CN3202 3pin CB/B
CN3202 5pin S-C/R
CN3202 7pin CR/B
Check the main unit.
(IC3601, Q3201~Q3204 periphery circuit.)
Check between CN3202 and CN2701.
No
No
No
No
No
Yes
Yes
Yes
Check the V-MUTE line.
Yes
Yes
Picture do not oper
ate nor
mally
.
Are the video signals shown above inputted into
the pins of IC2701?
IC2701 2pin CR/G
IC2701 6pin S-Y/COMP
IC2701 14pin C/R
IC2701 16pin CB/B
Are the video signals outputted to each pins of
IC2701?
IC2701 33pin S-C/R
IC2701 31pin COMP
IC2701 28pin S-Y
IC2701 22pin CB/B
IC2701 19pin CR/G
Is 5V applied to the pins(1), (13) and (34) of IC2701?
Replace IC2701.
Are the V-MUTE lines at the pins(3) and (15) of
IC2701 on "H" level?
*1
*2
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Is the E-E signal applied to the pin(4) of IC2003?
No
No
No
No
Check the DVD-(H) line.
No
Yes
Yes
Yes
Check the VIDEO OUT terminal (J1202) and the
line between the pin(2) of IC2003 and the VIDEO
OUT terminal (J1202).
Check the S-OUT terminal (J1201) and the line
between the pin(28) of IC2701 and the S-OUT
terminal (J1201).
Check the S-OUT terminal (J1201) and the line
between the pin(33) of IC2701 and the S-OUT
terminal (J1201).
Check line between pin(31) of IC2701 and pin(4) of
IC2003.
Is 5V applied to the pin(3) of IC2003?
Are the DVD-(H) at the pin(1) of IC2003 on "H" level?
*1
*2
No
No
No
• DVD OUT,
VCR/DVD OUT
output terminal:
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)?
• LINE1 output terminal:
Are the chroma or R signal, G signal, B signal
inputted the pin(6) of IC2502, IC2503 and IC2504?
Are the chroma or R signal, G signal, B signal
outputted to the pin(2) of IC2502, IC2503 and IC2504?
Are the chroma or R signal, G signal, B signal
outputted to the LINE1 output terminal?
Check the line between IC2701 and IC2502,
IC2503, IC2504.
Check the peripheral circuit of IC2502, IC2503 and
IC2504. Check the DVD-(H) line.
Check the LINE1 output terminal (SC2501) and
the line between the pin(2) of IC2502~IC2504 and
LINE1 output terminal.
No
No
No
Are the luminance or composite video signal
inputted the pin(7) of IC2501?
Are the luminance or composite video signal
outputted to the pin(25) of IC2501?
Are the luminance or composite video signal
outputted to the LINE1 output terminal?
• Check the line between the pin(28) or (31) of
IC2701 and the pin(7) of IC2501.
• Check IC2706 (composite or luminance signal
selector).
Check the peripheral circuit of IC2501.
Check the LINE1 output terminal (SC2501) and
the line between the pin(25) of IC2501 and
LINE1 output terminal.
Yes
Yes
Yes
Yes
FLOW CHART NO.10
Set the disc on the disc tray.
Are the digital audio interface signals outputted
to the pins of main unit connector CN3202?
CN3202
9pin L OUT
CN3202 11pin R OUT
Check the main unit. (IC3801, IC3601)
Check the line between the pins of main unit
connector CN2701 and the pins of IC6004.
CN2701 9pin
→
IC6004 3pin L OUT
CN2701 11pin
→
IC6004 5pin R OUT
No
No
Yes
Yes
Yes
Yes
Sound do not oper
ate nor
mally
.
Are the digital audio interface signals inputted
to the pins of IC6004?
IC6004 3pin L OUT
IC6004 5pin R OUT
Yes
No
Are the audio interface signals outputted to the
pins of IC6004?
IC6004 1pin L OUT
IC6004 7pin R OUT
Check the PC 9V line.
Check or replace IC6004.
Is 9V applied to the pin(8) of IC6004?
No
No audio from Hifi E-E (VCR). Check this item.
Are the audio signals outputted to the specific
output terminals?
Is the DVD audio signal outputted to the
AUDIO OUT terminal (J1202), LINE1 output terminal
(SC2501)?
No
No
No
Check the line between the pins of IC6004 and the
pins of IC651, audio mute (Q6007~6008).
IC6004 1pin
→
IC651 3pin L OUT
IC6004 7pin
→
IC651 1pin R OUT
No
Yes
Are the audio signals outputted to the specific
output terminals?
Is the DVD audio signal (L) outputted to the DVD
AUDIO OUT (L) terminal (J1205)?
Is the DVD audio signal (R) outputted to the DVD
AUDIO OUT (R) terminal (J1205)?
Check the DVD AUDIO OUT (L) terminal (J1205)
and the line between the pin(1) of IC6004 and the
DVD AUDIO OUT (L) terminal (J1205).
Check the DVD AUDIO OUT (R) terminal (J1205)
and the line between the pin(7) of IC6004 and the
DVD AUDIO OUT (R) terminal (J1205).
Are the audio interface signals inputted to the
pins of IC651?
IC651 3pin L OUT
IC651 1pin R OUT
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DV-NC65H/S
DV-NC70H
DV-NC70H
- M E M O -
