Sharp QT-CD250 (serv.man6) Service Manual ▷ View online
QT-CD250H/W
– 5 –
1
●
6 “D” size batteries (UM/SUM-1, R20, HP-2
or similar)
●
Batteries are not included.
5
4
6
1
3
2
1
Preparation for use
■
Headphones
■
Volume control
■
Turning the power ON
and to STAND-BY
■
Battery power
TUNER
AC power lead x 1
●
QT-CD250H for
customers in
Australia and
New Zealand
●
QT-CD250H for
customers in
Philippines
●
QT-CD250H for
customers in Europe
●
QT-CD250H for
customers in U.K.
●
For QT-CD250W
●
For QT-CD250W
●
For QT-CD250W
To an AC socket
(For Australia/New Zealand)
AC 230 - 240 V, 50 Hz
(For Philippines)
AC 220 V, 60 Hz
(For Europe)
AC 230 - 240 V, 50 Hz
VOLTAGE SELECTOR
AC
110V - 127V
AC
220V - 240V
1
2
To AC INPUT
AC 110-127/220-240 V,
50/60 Hz
To an AC socket
■
AC power (For QT-CD250W)
■
AC power (For QT-CD250H)
To AC INPUT
(For U.K.)
AC 230 - 240 V, 50 Hz
To an AC socket
2
3
Listening to a tape
5
T
o
stop playback
1
4
2
3
Label side up.
2
Listening to a CD
TUNER
TUNING
PLAY / PAUSE
TUNING
STOP
1
4
2
T
o
stop playback
3
TUNER
OPERATION MANUAL
QT-CD250H/W
– 6 –
3
5
Recording from CDs
4
5
6
2
Label side up.
T
o
stop recording
3
1
4
Listening to the radio
TUNING
PLAY / PAUSE
TUNER
■
Aerial adjustment
FM
AM
1
After use
2
TUNER
TUNER
BAND
REPEAT
3
TUNING
TUNING
PLAY / PAUSE
STOP
Tune in to the desired station.
4
6
Recording from the radio
Do not touch the Laser pickup lens. If fingerprints
or dust accumulate on the pickup, clean it using
commercial cleaning disc (brush type.)
CD pickup cleaning
4
T
o
stop recording
6
8
1
5
●
7
2
BAND
REPEAT
3
TUNING
TUNING
PLAY / PAUSE
STOP
Tune in to the desired station.
TUNER
QT-CD250H/W
– 7 –
FM/AM INTERVAL (SPAN) (For QT-CD250W Only)
[10 kHz
➞
9 kHz]
[9 kHz
➞
10 kHz]
The International Telecommunication Union (ITU)
has established that member countries should
maintain either a 10 kHz or a 9 kHz interval be-
tween broadcasting frequencies of any AM station.
The illustration shows the 9 kHz interval zones (re-
gions 1 and 3), and the 10 kHz interval zone (re-
gion 2).
This product is not equipped with a span selector.
However, it will be adjusted to 9 kHz AM interval
(50 kHz FM interval) when shipped from the fac-
tory.
has established that member countries should
maintain either a 10 kHz or a 9 kHz interval be-
tween broadcasting frequencies of any AM station.
The illustration shows the 9 kHz interval zones (re-
gions 1 and 3), and the 10 kHz interval zone (re-
gion 2).
This product is not equipped with a span selector.
However, it will be adjusted to 9 kHz AM interval
(50 kHz FM interval) when shipped from the fac-
tory.
Before using the unit, be sure to set it for the AM
tuning interval (span) used in your area.
tuning interval (span) used in your area.
To check the tuning span currently selected:
1
Set the function switch to TUNER.
2
Press the REPEAT/BAND ( ) button to select
the AM band.
the AM band.
●
If “AM 531 kHz” is displayed, it means that the
radio has been adjusted for a 9 kHz span.
If “AM 530 kHz” is displayed, it means that the
radio has been adjusted for a 10 kHz span.
radio has been adjusted for a 9 kHz span.
If “AM 530 kHz” is displayed, it means that the
radio has been adjusted for a 10 kHz span.
To change from a 9 kHz AM (50 kHz FM) interval
to a 10 kHz AM (100 kHz FM) interval:
to a 10 kHz AM (100 kHz FM) interval:
1
Set the function switch to TUNER.
2
Hold down the TUNER MEMORY button and the
PRESET
PRESET
button for at least 3 seconds.
Release the buttons when “AM SP 9 kHz” and
“FM SP 50 kHz” are displayed alternately.
“FM SP 50 kHz” are displayed alternately.
3
Press the REPEAT/BAND (
) button to select
the “AM SP 10 kHz” and “FM SP 100 kHz” are
displayed alternately.
displayed alternately.
4
Press the TUNER MEMORY button to set it.
●
The unit will return back to the normal frequency
display.
display.
To return to a 9 kHz AM (50 kHz FM) interval:
1
Set the function switch to TUNER.
2
Hold down the TUNER MEMORY button and the
PRESET
PRESET
button for at least 3 seconds.
Release the buttons when “AM SP 10 kHz” and
“FM SP 100 kHz” are displayed alternately.
“FM SP 100 kHz” are displayed alternately.
3
Press the REPEAT/BAND (
) button to select
the “AM SP 9 kHz” and “FM SP 50 kHz” are dis-
played alternately.
played alternately.
4
Press the TUNER MEMORY button to set it.
●
The unit will return back to the normal frequency
display.
display.
Notes:
●
If the backup memory batteries are not inserted
and the power is disconnected, it will be auto-
matically returned to a 9 kHz span.
If this happens, insert the backup memory bat-
teries first and set the span again.
and the power is disconnected, it will be auto-
matically returned to a 9 kHz span.
If this happens, insert the backup memory bat-
teries first and set the span again.
●
When the span is switched, any stations that are
memorised will be cancelled.
memorised will be cancelled.
ON/STAND-BY
(Function)
TUNER
MEMORY
MEMORY
REPEAT
BAND
BAND
REVIEW
PRESET
PRESET
kHz
kHz
kHz
kHz
kHz
kHz
kHz
kHz
QT-CD250H/W
– 8 –
1
Top Cabinet/
1. Screw ................... (A1) x7
8-1
Front Cabinet
2. Socket .................. (A2) x1
3. Screw ................... (A3) x1
2
Power PWB/
1. Screw ................... (B1) x2
8-2
Terminal PWB
2. Hook ..................... (B2) x2
3. Socket .................. (B3) x1
4. Hook ..................... (B4) x2
4. Hook ..................... (B4) x2
3
Switch PWB
1. Screw ................... (C1) x2
8-2
2. Socket .................. (C2) x1
3. Hook ..................... (C3) x2
4. Screw ................... (C4) x4
3. Hook ..................... (C3) x2
4. Screw ................... (C4) x4
4
Main PWB/
1. Socket .................. (D1) x1
8-2
CD Control PWB
2. Screw ................... (D2) x7
(Note)
3. Screw ................... (D3) x1
4. Solder ................... (D4) x3
5. Socket .................. (D5) x3
4. Solder ................... (D4) x3
5. Socket .................. (D5) x3
8-3
6. Screw ................... (D6) x6
7. Hook ..................... (D7) x2
7. Hook ..................... (D7) x2
5
CD Mechanism
1. Screw ................... (E1) x3
8-3
6
Tape Mechanism
1. Screw ................... (F1) x4
8-3
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling the
unit and reassembling it, to keep it safe and ensure excellent
performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
Follow the below-mentioned notes when disassembling the
unit and reassembling it, to keep it safe and ensure excellent
performance:
1. Take cassette tape and compact disc out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit.
3. Take off nylon bands or wire holders where they need to
be removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.
the unit, be sure to rearrange the leads where they were
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
STEP
REMOVAL
PROCEDURE
FIGURE
Figure 8-3
Figure 8-1
Figure 8-2
CD MECHANISM SECTION
Perform steps 1 to 5 of the disassembly method to remove the
CD mechanism.
CD mechanism.
How to remove the pickup (See Fig. 8-4.)
1. Remove the screws (A1) x 2 pcs., to remove the shaft (A2)
x1 pc.
2. Remove the stop washer (A3) x1 pc., to remove the gear
(A4) x 1 pc.
3. Remove the pickup.
Stop
Washer
(A3) x1
Washer
(A3) x1
CD
Mechanism
Mechanism
Gear
(A4) x1
(A4) x1
Shaft
(A2) x1
(A2) x1
Pickup
(A1) x2
ø2.6 x6mm
REMOVING AND REINSTALLING THE MAIN PARTS
Figure 8-4
Note : (Figure 8-3 and Figure 8-4)
After removing the connector for the optical pickup from the
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector to protect the optical pickup from
electrostatic damage.
front end of connector to protect the optical pickup from
electrostatic damage.
(E1)x3
ø2.5x10mm
ø2.5x10mm
(F1)x4
ø3x10mm
ø3x10mm
(D5)x1
(D5)x2
Top Cabinet
(D6)x6
ø3x8mm
ø3x8mm
(D7)x2
Washer
CD Mechanism
CD Control
PWB
PWB
Tape
Mechanism
Mechanism
Top Cabinet
AC Socket
(B1)x2
ø3x12mm
ø3x12mm
(D2)x7
ø3x12mm
ø3x12mm
(C1)x2
ø3x12mm
ø3x12mm
(C4)x4
ø3x10mm
ø3x10mm
(D3)x1
ø2.5x8mm
ø2.5x8mm
Main PWB
Power PWB
(D4)x3
(B3)x1
(B2)x2
(B4)x2
(D1)x1
CD Lid
Switch
Switch
Power Transformer
Terminal
PWB
PWB
(C3)x2
Switch PWB
(C2)x1
SW651
(Voltage Selector)
QT-CD250W Only
(Voltage Selector)
QT-CD250W Only
Power Transformer
(A1)x3
ø3x12mm
ø3x12mm
Top Cabinet
Front Cabinet
(A1)x4
ø3x12mm
ø3x12mm
SP202
R-CH
Main
PWB
PWB
(A2)x1
(A3)x1
ø3x10mm
ø3x10mm
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