Sharp DV-L80 (serv.man16) Service Manual ▷ View online
DV-L80S/W
17
[OFFSET ADJUSTMENT PROCEDURE]
Notes: 1) When replacing the IC401 (IX1690GE) and IC507 (SNT1G08C), readjustment is required.
2) Adjustment must be made at an ordinary temperature.
If temperature is high immediately after reflow or if IC temperature has risen immediately after continuous operation,
adjustment must not be made.
adjustment must not be made.
(Adjustment spec)
-30mV - +10mV
(Inspection specification) -30mV - +20mV
(Adding temperature drift after adjustment)
The "MENU" key input.
The "1" key input.
"F0" key input (Keep pressing the "Return" and "Vol_up" keys for about 3 second.)
From (2)
Connect the L side of the voltmeter to CN302 (2 pin) and the H side to CN302 (4 pin).
With the cross key "
With the cross key "
'
" or "
"
" set the output voltage to the range from -30mV to +10mV.
FOCUS offset adjustment mode
The "RETURN" key input.
Connect the L side of the voltmeter to CN302 (3 pin) and the H side to CN302 (1 pin).
With the cross key "
With the cross key "
'
" or "
"
" set the output voltage to the range from -30mV to +10mV.
TRACK, offset adjustment mode
Make sure that the spindle motor stops.
Press the "RETURN" key.
FOCUS
000000** 000000**
000000** 000000**
FOCUS
000000** 000000++
000000** 000000++
DYNAMIC TEST
30000000 00000000
30000000 00000000
F00000000 00000000
The ++ part is changed every
time of the key input.
time of the key input.
TRACK
000000** 000000++
000000** 000000++
The ++ part is changed every
time of the key input.
time of the key input.
ADJUST COMPLETE
00**00** 00000000
00**00** 00000000
The investigated result is displayed in the ++ part.
The displayed contents are from the left "Focus offset adjustment value", "Track offset adjustment value".
The displayed contents are from the left "Focus offset adjustment value", "Track offset adjustment value".
End of adjustment
OSD display
[ROM RENEWAL MODE]
1. Connect the DVD main unit and the computer as shown on the right. And then start-up the software for rewriting.
2. Turn on the power while the play key and the pause key of the DVD main unit are kept pressed at the same time. (Keep pressing
2. Turn on the power while the play key and the pause key of the DVD main unit are kept pressed at the same time. (Keep pressing
about 3 second.)
The red LED flickers 5 - 6 times with the 0.5 second cycle and then the green LED flickers with 0.1 second cycle.
3. According to the computer display, data transfer prompt is issued by inputting “Y” and
pressing ENTER key, and when the rewriting starts normally,
The LED in green lights on from flickering.
4. When the rewriting is completed normally,
The green LED lights on.
5. After completing the rewriting and checking the display of No. 4 shown above,
always press the “STOP” key. After that turn off the POWER.
6. Treatment in case of rewriting error
1
The red LED flickers with 0.1 second cycle (When the stop key is pressed it
return to the condition of “2” so write again.)
2
The red/green LED flickers by turns (When the stop key is pressed it becomes
the condition of “5” so write again from “1”.)
Personal computer
(DOS)
DVD itself
Connect to the video input
terminal.
Connect the “red” audio cable to jig.
terminal.
Connect the “red” audio cable to jig.
Fixture for the ROM renewal
DV-L80S/W
18
8.
TR
OUBLESHOO
TING
Check AC adapter or CAR adapter or battery-pack.
No
Voltage on DC JACK (Approx. 10.5V) or CAR
JACK (Approx. 9V) or battery terminal (8.4 - 6V)?
Yes
The power cannot be turned on.(1)
•When using the AC adapter ------check circuit
around F9801, Q904, Q905, connector, lead wire.
•When using battery------check circuit around
F901, Q906, Q913, connector, lead wire.
No
Voltage specified above (Approx.6 - 11V) on
TP9002, TP9003 in the MAIN?
Yes
Voltage of approx. 6 - 11V supplied on 5 pin of
IC5503?
No
Voltage of approx. 5V supplied on 72 pin of
IC5502 (TV microcomputer)?
Yes
Yes
29 pin of IC5502 still “L”?
No
Oscillation signal of 32kHz checked on 23, 24 pins
of IC5502?
Yes
Check the IC5502 and X5502.
Check the Q5514 and Q5511.
No
No
No
Yes
Circuit protector CP9001 is actuated (disconnection)
replace. Check CLD inverter circuit and INV-V line.
Refer to “
The key operation is disabled.
” or
“No operation is possible from the infrared remote
control.”.
No
Approx. 5V outputted to 45 pin of IC5502?
No
Yes
Check PCON-H line between IC5502 - IC9001.
Approx. 4.5 V supplied to 20 - 22 pins of IC9001?
Yes
Appropriate voltage outputted on each B line
(TP9005 - 9012)?
No
No
Yes
Triangle oscillation of approx. 0.6V p-p checked on
17 pin of IC9001?
Circuit protector CP9002, CP9003 cut?
Yes
Check short circuit of each SWITCHING TR and
each B line.
* All the B lines cannot be outputted for short
circuit of even 1postion (1 line).
Replace IC5503.
Replace IC9001.
FLOW CHART NO.1
Attach junction line properly or replace junction line.
No
Wire between operation PWB and MAIN PWB
connected properly?
Yes
Yes
The key operation is disabled.
No
Power button does not function.
No
When power button is pressed, 5 pin of IC5502 is
"L"?
Yes
Is the control voltage normally into the pins(78)
and (80) of IC5502? (78pin
→
KEY)
Replace operation pwb.
Yes
Replace operation pwb.
Replace IC5502.
No
Replace IC5502.
FLOW CHART NO.2
Check TVMI_5V line.
Replace the remote control receiver.
FLOW CHART NO.3
Operation is possible from the body, but no
operation is possible from the infrared remote
control.
Replace the remote control receiver or replace the
remote control transmitter is necessary.
Is 5V voltage supplied to the pin 2 terminal of
remote control receiver?
Is the "L" pulse sent out pin 3 terminal of receiver
when the infrared remote control is activated?
(Actuated with power button)
DVD cannot be operated but TV can be operated.
(DVD is actuated with play, stop button.)
To 2
1“L” pulse signal is generated from 79 pin of
IC5502?
(Actuated with power button)
No
No
No
Yes
No
To 1
Replace IC5502.
No
Yes
Check line of 2 pin of IC3001.
2“L” pulse signal is generated from 32 pin of
IC502?
(DVD is actuated with play, stop button.)
Replace IC502.
No
Yes
Check D506 line.
Yes
Yes
Yes
No operation is possible from the infrared remote control.
3.0V
3.7V
2.3V
1.6V
0.9V
Volume large Volume small
TV/External/DVD button
change over
SKIP(+)/RIGHT
→
SKIP(-)/LEFT
UP
↑
/STILL DOWN
↓
/STOP
Play setting Determination/Play
RETURN
DV-L80S/W
19
FLOW CHART NO.4
Is the tray lid open?
When S802 is pressed, are the pins 3 and 4
short-circuited?
Check the connection between pins 2 or 4 of S802
and pins 27 of IC502.
Does the pickup move in the direction of inner
periphery?
No
No
No
No
Check the cable connecting to the P706.
(Check the P706 and line of pins 2 and 4 of IC705.)
Check the cable connecting to the CN705.
Replace the S802.
Yes
No
Yes
After moving in the direction of inner periphery,
does the pickup move in the direction of outer
periphery?
Yes
Check the M_4.8V line.
Is 4.8V being applied to the pins 16 and 17 of
IC702?
Yes
Replace the IC702.
Yes
The disc does not rotate.
No
Is FE signal inputted into the pin 8 of IC401.
Check or replace IC401.
Check the line between the IC301 and IC401.
FLOW CHART NO.5
When removing disc and applying load to spin
motor (by stopping with hand, etc.), objective lends
moves up and down? (Checking item to symptom)
Note) If load is not applied to spin, lens does not
move and becomes NO DISC immediately.
See FLOW CHART NO.6<The [No Disc] indication.
(In case focus servo does not function.)>
Replace IC301.
Is there input signal on the pins(50,55) and (49,54)
of IC301?
Is FE signal output to the pin 21 of IC301 when
the disc is set?
No
No
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup.
Yes
No
Yes
Yes
Yes
The [No Disc] indication.
(In case of f
ocus error)
In case of CD For DVD, 58, 59, 63, and 64
FLOW CHART NO.6
Is the focus control signal output to the pin 14 of
IC401?
Check the IC401 DAC power source periphery
circuit. If it is normal, replace IC401.
Check M_5V line.
Is 8V voltage applied to the pins 8 and 27 and
25 and 24 of IC705?
Replace IC705.
Is the focus control signal from the pin 14 of IC401
input into the pin 20 of IC705?
Check the focus control signal (DA0) line between
the IC705 and IC401.
Is the focus control drive voltage output from the
pins 29 and 30 of IC705?
No
No
No
Yes
Yes
Yes
No
Yes
The [No Disc] indication.
(In case f
ocus ser
v
o
does not function.)
Check the line between the IC705 and the focus
actuator.
Focus control drive voltage applied to 27, 29 pin
of CN301 (focus actuator terminal)?
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup.
FLOW CHART NO.7
Check the D_3.1V line and A_5V line.
Is the drive signal (SEL) of Q301 (LD POWER
ON) being output to the pin 150 of IC401?
Is the drive signal (LDO1) of Q302 (LD POWER
CTL) being output to the pin 45 of IC301?
When S801 is pressed, is the base of Q303 0.8V?
Is the voltage of 3.3V being applied to the emitter
of Q301? And, is the voltage of 3.4V being applied
to the emitter of Q302?
Is the voltage of 3.1V and 2.3V being applied to
the pins 14 and 23 of CN301, respectively?
Check the connection of optical pickup cable.
If it is normal, replace the pickup.
Check the Q301 and line between Q302 and
CN301.
Check the line from the pin 150 of IC401, through
Q305, to the base of Q301.
Check the line between the pin 45 of IC301 and
base of Q302.
Check the line between S801 and R309.
No
No
No
No
No
No
Yes
Yes
Yes
Yes
The DVD disc is not recognized.
(When the laser beam does not go on)
FLOW CHART NO.8
Check the A_5V line.
Is the drive signal (LDO2) of Q304 (LD POWER
CTL) being output to the pin 4 of IC301?
When S801 is pressed, is the base of Q303 0.8V?
Is the voltage of 3.4V being applied to the emitter
of Q304?
Is the voltage of 2.3V being applied to the pin 9
of CN301?
Check the connection of optical pickup cable.
If it is normal, replace the pickup
Check the line between Q304 and CN301.
Check the line between the pin 4 of IC301 and
base of Q304.
Check the line between S801 and R309.
No
No
No
No
Yes
Yes
Yes
The CD disc is not recognized.
(When the laser beam does not go on)
FLOW CHART NO.9
Check tray switch. S801, 802
No
Check for contamination of objective lens of
optical pickup.
Replace the optical pickup unit.
When cover is closed, disc starts rotating?
Check the main PWB unit.
Set disc to mechanism.
Replace the main PWB unit.
Is the level of RF signal which is output from
pin 28 of IC301, normal?
No
No
No
Yes
Yes
Yes
Yes
Both picture and sound do not oper
ate nor
mally
.(1)
DV-L80S/W
20
FLOW CHART NO.10
Check or replace Q2201.
Set the disc on the disc tray.
Check the V-MUTE line.(Pin3 of D2204)
5V applied to 1 pin of IC2201?
Are the video signals shown above input into
the pins of IC2201?
IC2201 2PIN Y/CR
IC2201 15PIN C/CB
Are the video signal outputted to each pins of
IC2201?
(1)When S1-OUT/VIDEO OUT is selected with the
signal selection switch(Q2201).
IC2201 11PIN CVBS
IC2201 6PIN S-Y
IC2201 12PIN S-C
Check the line between the pins of main unit
IC601 and the pins of IC2201.
IC601 117PIN
→
IC2001 2PIN Y/CR
IC601 118PIN
→
IC2001 15PIN C/CB
No
No
No
Yes
No
Yes
Yes
Picture do not oper
ate nor
mally
.
FLOW CHART NO.11
Check or replace IC6611.
Set disc to DISC tray and play.
Digital sound signal inputted to each pin of
IC6611?
IC6611 38PIN AMCLK
IC6611 40PIN ABCLK
IC6611 41PIN ALRCLK
IC6611 45PIN AOUT0
Check each line between each pin of IC601 and
each input pin of IC6611.
IC601 144PIN
→
IC6611 38PIN AMCLK
IC601 154PIN
→
IC6611 40PIN ABCLK
IC601 153PIN
→
IC6611 41PIN ALRCLK
IC601 149PIN
→
IC6611 45PIN AOUT0
System control signal inputted to each pin of
IC6611?
IC6611 34PIN DAC DA
IC6611 35PIN DAC CK
IC6611 36PIN DAC L
IC6611 37PIN RSTO I
Check or replace IC6611.
Check each line between each pin of IC502 and
IC504 and each input pin of IC6611.
IC502 110PIN
→
IC6611 34PIN DAC DA
IC502 111PIN
→
IC6611 35PIN DAC CK
IC502 112PIN
→
IC6611 36PIN DAC L
IC504 12PIN
→
IC6611 37PIN RSTO I
No
No
Yes
Yes
Yes
Check or replace IC6610.
Yes
Yes
Sound is not given properly from speaker.
Control signal inputted to each in of IC6610?
IC6610 2PIN VOL_UP
IC6610 3PIN VOL_DOWN
IC6610 17PIN VOL_CLK
Check from each pin of IC5502 to each input pin
of IC6610.
IC5502 33PIN
→
IC6610 2PIN VOL_UP
IC5502 4PIN
→
IC6610 3PIN VOL_DOWN
IC5502 58PIN
→
IC6610 17PIN VOL_CLK
No
Yes
Is 15 pin of IC6610 low?
Check the R6665, R6666, R6667, R6669, D6603.
No
Yes
Sound signal inputted to each pin of IC6610?
IC6610 5PIN Lch Input
IC6610 23PIN Rch Input
Check the IC6604, IC6605 and IC6607 and
peripheral circuit.
No
Yes
Charge troubleshooting
Go to item 4.
Charge LED (red) lights on?
1.
Yes
No
No
No
Yes
No
No
Yes
Yes
Yes
No
Power supplied from AC adapter?
Power of main unit can be turned on and off?
Power of main unit OFF?
F9801 fuse is not cut?
Voltage of battery alone is 2V or more?
Replace fuse.
Failure of battery.
Cannot be charged from car adapter.
Failure other than charging.
Cannot be charged when power is ON.
Turn off power and check.
44 pin of IC5502 is H?
6 pin of CN902 is H?
4.
No
No
No
No
Investigate CHG_ON line. Disconnection of
MAIN - charge PWB connection FFC.
Investigate CHG_ON line or breakdown of IC5502.
Yes
Yes
Yes
Yes
2 pin of IC901 oscillating at approx. 200kHz?
19 pin of IC901 oscillating at approx. 200kHz?
Voltage on C901?
Investigate from C901 to battery terminal.
Check around IC901 or breakdown of IC901.
Check around IC901 or breakdown of IC901.
Investigate Q908, D906, L901, and R915.
In the condition that power is supplied from AC adapter and power is off, nothing is connected to battery terminal.
2.
Yes
No
Yes
Yes
No
Yes
No
Voltage of 0V/8.4V generated to battery terminal
cyclically.
"H" voltage on 8 pin of IC5502?
No
"H" voltage on 3 pin of IC5502?
Yes
Investigate CHG_ON line. Charging circuit must
function accompanied by CHG_ON cyclically.
Voltage on 77 pin of IC5502?
44 pin of IC5502 repeating H/L cyclically?
If certain voltage is on, investigate BAT_V line.
When battery is not connected, voltage of 0V/4.2V
is outputted cyclically.
Study on other items.
Investigate line of DCIN_H.
Investigate Car_H line (Must not charge if it is H.)
Only battery is connected. (Assume herein that battery with voltage of 7.4 V is connected.)
3.
Yes
No
No
No
Yes
Voltage of 3.7V on 77 pin of IC5502?
Voltage on 7 pin of CN902?
Yes
No
Yes
1V or less on 9 pin of CN902?
Investigate from 9 pin of CN902 and around Q905.
No problems with this item.
Investigate around IC5504.
Investigate around IC5504 and 7 pin, 8 pin of
CN902.
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