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Model
QT-CD180 (serv.man3)
Pages
13
Size
780.14 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / Portable / Part 1 - text
File
qt-cd180-sm3.pdf
Date

Sharp QT-CD180 (serv.man3) Service Manual ▷ View online

QT-CD180H/QT-CD180W
– 5 –
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
SPECIFICATIONS
Specifications for this model are subject to change without
prior notice.
Compact disc player
Type
Signal readout
Audio channels
Filter
D/A converter
Wow and flutter
Compact disc
Non-contact, 3-beam semiconductor laser pickup
2
8-time over sampling digital filter
1-bit D/A converter
Unmeasurable (less then 0.001% W. peak)
AC 230-240 V, 50 Hz
DC 9 V [“D” size (UM/SUM-1, R20 or HP-2) battery x 6]
10 W
MPO: 8.4 W (4.2W + 4.2W)
(AC operation, DIN 45 324)
RMS: 4.6 W (2.3W + 2.3W)
(DC operation, DIN 45 324)
8 cm (3-1/8") full-range speaker x 2
Width: 376 mm (14-6/8")
Height: 150 mm (5-7/8")
Depth: 230 mm (9")
2.5 kg (5.5 lbs.) without batteries
General
Power source
Power consumption
Output power
Speakers
Dimensions
Weight
FM: 87.5 - 108 MHz
AM: 526.5 - 1,606.5 kHz
Radio
Frequency range
Tape recorder
Frequency response
Signal/noise ratio
Wow and flutter
Motor
Bias system
Erase system
50 - 14,000 Hz (Normal tape)
50 dB
0.3 % (DIN 45 511)
DC 9 V electric governor
AC bias
Magnet erase
(QT-CD180H except for U.K./Australia/
                                       New Zealand/Philippines)
Compact disc player
Type
Signal readout
Audio channels
Filter
D/A converter
Wow and flutter
Compact disc
Non-contact, 3-beam semiconductor laser pickup
2
8-time over sampling digital filter
1-bit D/A converter
Unmeasurable (less than 0.001% W. peak)
AC 230-240 V, 50 Hz
DC 9 V [“D” size (UM/SUM-1, R20 or HP-2) battery x 6]
10 W
MPO: 8.4 W (4.2W + 4.2W)  
(AC operation, 10 % T.H.D.) 
RMS: 4.6 W (2.3W + 2.3W)
(DC operation, 10 % T.H.D.)
8 cm (3-1/8") full-range speaker x 2
Width: 376 mm (14-6/8")
Height: 150 mm (5-7/8")
Depth: 230 mm (9")
2.5 kg (5.5 lbs.) without batteries
General
Power source 
Power consumption 
Output power 
Speakers
Dimensions
Weight
FM: 87.5 - 108 MHz
AM: 526.5 - 1,606.5 kHz
Radio
Frequency range
Tape recorder
Frequency response
Signal/noise ratio
Wow and flutter
Motor
Bias system
Erase system
50 - 14,000 Hz (Normal tape)
50 dB
0.25 % (WRMS)
DC 9 V electric governor
AC bias
Magnet erase
(QT-CD180H for U.K.)
General
For customers in Australia and New Zealand: 
AC 230-240 V, 50 Hz
For customers in Philippines: 
AC 220 V, 60 Hz
DC 9 V [“D” size (UM/SUM-1, R20 or HP-2) battery x 6]
10 W
MPO: 8.4 W (4.2W + 4.2W)
(AC operation, 10% T.H.D.)
RMS: 4.6 W (2.3W + 2.3W)
(DC operation, 10% T.H.D.)
8 cm (3-1/8") full-range speaker x 2
Width: 376 mm (14-6/8")
Height: 150 mm (5-7/8")
Depth: 230 mm (9")
2.5 kg (5.5 lbs.) without batteries
Power source
Power consumption
Output power
Speakers
Dimensions
Weight
For customers in Australia and New Zealand:
FM: 87.5 - 108 MHz   AM: 526.5 - 1,606.5 kHz
For customers in Philippines:
FM: 88 - 108 MHz     AM: 526.5 - 1,606.5 kHz
Radio
Frequency range
Compact disc player
Type
Signal readout
Audio channels
Filter
D/A converter
Wow and flutter
Compact disc
Non-contact, 3-beam semiconductor laser pickup
2
8-time over sampling digital filter
1-bit D/A converter
Unmeasurable (less than 0.001% W. peak)
Tape recorder
Frequency response
Signal/noise ratio
Wow and flutter
Motor
Bias system
Erase system
50 - 14,000 Hz (Normal tape)
50 dB
0.25 % (WRMS)
DC 9 V electric governor
AC bias
Magnet erase
(QT-CD180H for Australia/New Zealand/Philippines)
Compact disc player
Type
Signal readout
Audio channels
Filter
D/A converter
Wow and flutter
Compact disc
Non-contact, 3-beam semiconductor laser pickup
2
8-time over sampling digital filter
1-bit D/A converter
Unmeasurable (less than 0.001% W. peak)
AC110-127/220-240, 50/60 Hz
DC 9 V [“D” size (UM/SUM-1, R20 or HP-2) battery x 6]
13 W
MPO: 8.4 W (4.2W + 4.2W)
(AC operation, 10% T.H.D.)
RMS: 4.6 W (2.3W + 2.3W)
(DC operation, 10% T.H.D.)
8 cm (3-1/8") full-range speaker x 2
Width: 376 mm (14-3/4")
Height: 150 mm (5-7/8")
Depth: 230 mm (9")
2.6 kg (5.8 lbs.) without batteries
General
Power source
Power consumption
Output power
Speakers
Dimensions
Weight
FM: 88 - 108 MHz
AM: 526.5 -1,606.5 kHz
Radio
Frequency range
T
ape recorder
Frequency response
Signal/noise ratio
Wow and flutter
Motor
Bias system
Erase system
50 - 14,000 Hz (Normal tape)
50 dB
0.25 % (WRMS)
DC 9 V electric governor
AC bias
Magnet erase
(QT-CD180W)
QT-CD180H/QT-CD180W
– 6 –
NAMES OF PARTS
FITTING OF DIAL POINTER
Figure 6-1
Drum
Drum
Dial
Pointer
Dial
Pointer
Tuning Knob
Tuning Knob
Main PWB
Main PWB
Main PWB
Top Cabinet
Top Cabinet
Variable
Capacitor
Variable
Capacitor
A
B
Drum
Dial
Pointer
Tuning Knob
FL Mark
Dial Pointer
FH
FL
Illustration: QT-CD180W
Setting method of the dial pointer
1. Remove the front cabinet. (Refer to Fig.8-2 on page 8,
"Disassembly method".)
2. Remove the dial pointer.
3. Insert the dial pointer from  A  of the top cabinet so that it
engages with the drum gear.
4. Fully turn the drum in the opposite direction of  B  and set
it to the FL marks.
5. Reassemble the front cabinet.
11. (TAPE) Record Button
12. (CD) Play/Pause Button
13. (CD) Track Up/Cue Button
14. Cassette Compartment
15. (CD) Stop Button
16. (CD) Track Down/Review
Button
17. (CD) Play Indicator
18. (CD) Pause Indicator
19. Voltage Selector Switch (QT-CD180W Only)
0
1. Extra Bass Button
0
2. Volume Control
0
3. Function Switch
0
4. CD Compartment
0
5. (TAPE) Pause Button
0
6. (TAPE) Stop/Eject Button
0
7. (TAPE) Fast Forward Button
0
8. (TAPE) Rewind Button
0
9. Tuning Control
10. (TAPE) Play Button
1
2
3
4
5 6
7
8
9
10
12
11
13
14
15
16
17
18
VOLTAGE SELECTOR
AC
110-127V
AC
220-240V
19
21. Battery Compartment
20. FM Telescopic Rod Aerial
22. AC Power input Socket
21
20
22
23. Headphone Socket
24. Beat Cancel Switch
      (QT-CD180W Only)
23
BEAT CANCEL
A
B
24
QT-CD180H/QT-CD180W
– 7 –
OPERATION MANUAL
5
4
6
1
3
2
Operation with AC power (For U.K.)
To an AC
socket
To AC INPUT
AC 230-240 V,
50 Hz
6 “D” size batteries 
(UM/SUM-1, R20, HP-2 or similar)
Batteries are not included.
■ 
Turning the power ON
and setting to the
STAND-BY mode
Label side up.
To stop playback
Press the STOP 
 button.
1
2
3
4
5
1
Preparation for use
2
Listening to a CD
2
5
Recording from a CD
4
To stop recording
Press the STOP/EJECT
 
button.
Load the disc to be
recorded.
1
2
3
4
Listening to a Cassette Tape
To stop playback
Press the STOP/EJECT
button.
1
2
3
Listening to the Radio
1
3
5
To an AC socket
To AC INPUT
 
AC 230-240 V,
50 Hz
To an AC socket
 
To AC INPUT
AC 230-240 V,
50 Hz 
AC 220 V,
60 Hz 
(For Australia/New Zealand) 
(For Philippines) 
(Except for U.K./Australia/New Zealand
  Philippines) 
AC110-127/220-240 V,
50/60 Hz 
To AC INPUT
To an AC socket
(For QT-CD180W) 
Operation with batteries
(For QT-CD180H) 
QT-CD180H/QT-CD180W
– 8 –
1
Rear Cabinet
1. Screw ................... (A1) x4
8-1
2. Socket .................. (A2) x1
2
Front Cabinet
1. Open the cassette holder
8-2
2. Socket .................. (B1) x1
3. Screw ................... (B2) x4
4. Screw ................... (B3) x2
3
Main PWB (With
1. Knob ..................... (C1) x1
8-3
 CD Control PWB/ 2. Socket .................. (C2) x3
 X-BASS PWB/
3. Screw ................... (C3) x5
 Headphones
4. Screw ................... (C4) x1
 PWB) (Note)
5. Socket .................. (C5) x1
4
Headphones PWB 1. Screw ................... (D1) x1
8-3
5
Tape Mechanism
1. Screw ................... (E1) x2
8-3
6
CD Control PWB
1. Screw ................... (F1) x2
8-4
(With Main PWB)
2. Bracket ................. (F2) x2
7
CD Mechanism
1. Screw ................... (G1) x3
8-4
8
Power PWB
1. Battery Lid ............ (H1) x1
8-5
2. Screw ................... (H2) x1
                 (For QT-CD180H)
2. Screw ................... (H2) x2
                 (For QT-CD180W)
3. Bracket ................. (H3) x1
4. Hook ..................... (H4) x1
9
Beat Cancel PWB 1. Screw .................... (J1) x1
8-5
(QT-CD180W Only) 2. Socket ................... (J2) x1
DISASSEMBLY
STEP
REMOVAL
PROCEDURE
FIGURE
Figure 8-3
Figure 8-1
Figure 8-2
Figure 8-5
Figure 8-4
Note:
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector remove to protect the optical pickup
from electrostatic damage.
(B3)x1
ø3x8mm
(B2)x4
ø3x10mm
(B3)x1
ø3x8mm
Tape Mechanism
Front
Cabinet
Main
PWB
Open
Cassette
Holder
(B1)x1
(G1)x3
ø2.5x10mm
CD Mechanism
CD Control
PWB
Top Cabinet
PWB
Washer x3
(F1)x2
ø3x10mm
(F2)x1
(F2)x1
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
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.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
(C3)x5
ø3x10mm
(E1)x2
ø3x10mm
(C4)x1
ø2.5x10mm
(C2)x2
(C1)x1
Volume PWB
Tape
Mechanism
CD
Mechanism
CD Motor
PWB
Main PWB
Top
Cabinet
(C5)x1
(D1)x1
ø3x10mm
X-BASS
PWB
Headphones
PWB
(C2)x1
Front Cabinet
Rear Cabinet
Top Cabinet
(A1)x4
ø3x14mm
Main PWB
(A2)x1
(H2)x1
ø3x10mm
Rear Cabinet
Power PWB
Beat Cancel PWB
Driver
(H4)x1
(H1)x1
(H3)x1
(J1)x1
ø3x8mm
Power
PWB
(H2)x2
ø3x12mm
(H3)x1
Voltage
Selector
QT-CD180W
Only
For QT-CD180H
For QT-CD180W
QT-CD180W
Only
(J2)x1
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