Sharp SD-SH111 (serv.man20) Service Manual ▷ View online
– 95 –
SD-SH111
TROUBLESHOOTING
Is the disc chucked at the specified location ?
Check the changer mechanism.
Check the connection between pins 3 and 7 of
IC705 and M3.
IC705 and M3.
Does the pickup move in the direction of inner
periphery ?
periphery ?
No
No
No
No
Replace IC705.
Check the cable connecting to the CS3301.
(Check the CS3301 and line of pins 13 and 14 of
IC3801.)
(Check the CS3301 and line of pins 13 and 14 of
IC3801.)
Check the cable connecting to the CS3301.
Repair the changer mechanism.
Yes
Yes
No
Yes
After moving in the direction of inner periphery,
does the pickup move in the direction of outer
periphery ?
does the pickup move in the direction of outer
periphery ?
Yes
Check the M_8 V line.
Is 8 V being applied to the pins 8 of IC3801 ?
Yes
Replace the IC3801.
Yes
The disc does not rotate.
No
Is FE signal inputted into the pin 150 of IC3701.
Check or replace IC3701.
Check the line between the IC3301 and IC3701.
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.
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 <The [No Disc] indication.
(In case focus servo does not function.)>
(In case focus servo does not function.)>
Replace IC3301.
Is there input signal on the pins(50,55) and (49,54)
of IC3301?
of IC3301?
Is FE signal output to the pin 21 of IC3301 when
the disc is set ?
the disc is set ?
No
No
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup.
If it is normal, replace the optical pickup.
Yes
No
Yes
Yes
Yes
The [No Disc] indication. (In case of focus error)
In case of CD.
For DVD, 58, 59, 63, and 64
For DVD, 58, 59, 63, and 64
SD-SH111
– 96 –
Is the focus control signal output to the pin 14 of
IC3701?
IC3701?
Check the IC3701 DAC power source periphery
circuit. If it is normal, replace IC3701.
circuit. If it is normal, replace IC3701.
Check the line between the IC3701 and the focus
actuator terminal.
actuator terminal.
Check M_5 V line.
Is 8V voltage applied to the pins 8 of IC3801?
Replace IC3801.
Is the focus control signal from the pin 158 of
IC3701 input into the pin 23 of IC3801 ?
IC3701 input into the pin 23 of IC3801 ?
Check the focus control signal (FOD) line between
the IC3801 and IC3701.
the IC3801 and IC3701.
Is the focus control drive voltage output from the
pins 17 and 18 of IC3801 ?
pins 17 and 18 of IC3801 ?
Focus control drive voltage applied to 47, 49 pin
of CS3301 (focus actuator terminal) ?
of CS3301 (focus actuator terminal) ?
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup
mechanism Unit.
If it is normal, replace the optical pickup
mechanism Unit.
Check the D_3.1 V line and A_5 V line.
Is the drive signal (FLGA) of Q3301 (HF- MOD SW)
being output to the pin 37 of IC3701?
Is the drive signal (LDO2) of Q3302 (LD POWER
CTL) being output to the pin 4 of IC3301 ?
being output to the pin 37 of IC3701?
Is the drive signal (LDO2) of Q3302 (LD POWER
CTL) being output to the pin 4 of IC3301 ?
Is the voltage of 3.3 V being applied to the emitter
of Q3301? And, is the voltage of 3.4 V being
applied to the emitter of Q3302 ?
of Q3301? And, is the voltage of 3.4 V being
applied to the emitter of Q3302 ?
Is the voltage of 3.1V and 2.3V being applied to
the pins 34 and 43 of CS3301, respectively?
the pins 34 and 43 of CS3301, respectively?
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup
mechanism Unit.
If it is normal, replace the optical pickup
mechanism Unit.
Check the Q3301 and line between Q3302 and
CS3301.
CS3301.
Check the line from the pin 37 of IC3701, to the
base of Q3301.
Check the line between the pin 45 of IC3301 and
the base of Q3302.
base of Q3301.
Check the line between the pin 45 of IC3301 and
the base of Q3302.
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
The [No Disc] indication. (In case focus servo does not function.)
The DVD disc is not recognized.
(When the laser beam does not go on)
(When the laser beam does not go on)
Check the A_5 V line.
Is the voltage of 3.4V being applied to the emitter
of Q3303 ?
of Q3303 ?
Is the voltage of 2.3V being applied to the pin 29
of CS3301 ?
of CS3301 ?
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup
mechanism Unit.
If it is normal, replace the optical pickup
mechanism Unit.
Check the line between Q3303 and CS3301.
No
No
Yes
Yes
The CD disc is not recognized.
(When the laser beam does not go on)
(When the laser beam does not go on)
– 97 –
SD-SH111
Refer to “Disc does not turn.”
No
Check for contamination of objective lens of
optical pickup.
optical pickup.
Replace the optical pickup mechanism Unit.
When chucked, disc starts rotating ?
Check the DVD servo PWB unit.
Place the disc on the tray and close it.
Replace the DVD servo PWB unit.
Is the level of RF signal which is output from
pin 28 of IC3301, normal ?
pin 28 of IC3301, normal ?
No
No
No
Yes
Yes
Yes
Yes
Both picture and sound do not operate normally. (1)
Set the disc on the disc tray.
Are the video signals shown above input into
the pins of CP5001?
CP5001 7pin Y/CR
CP5001 9pin C/CB
CP5001 5pin VOUT
the pins of CP5001?
CP5001 7pin Y/CR
CP5001 9pin C/CB
CP5001 5pin VOUT
Check or replace DSP PWB
Check the line between the pins of DVD servo unit
IC3601 and the pins of CP5001.
IC3601 105pin
IC3601 and the pins of CP5001.
IC3601 105pin
→
CP5001 7pin Y/CR
IC3601 106pin
→
CP5001 9pin C/CB
IC3601 102pin
→
CP5001 5pin VOUT
No
Yes
Yes
Picture do not operate normally.
Check or replace IC3601.
Set disc to DISC tray and play.
Digital sound signal inputted to pin 34 of
IC504?
IC504?
Check each line between pin 133 of IC3601 and
input pin 34 of IC504.
input pin 34 of IC504.
Check or replace DSP PWB
No
Yes
Yes
Yes
Sound is not given properly from speaker.
Display