Sharp QT-CD161H (serv.man2) User Manual / Operation Manual ▷ View online
QT-CD141H/161H/162H
– 4 –
NAMES OF PARTS
1. (TAPE) Record Button
2. (TAPE) Play Button
3. (TAPE) Rewind Button
4. (TAPE) Fast Forward Button
5. (TAPE) Stop/Eject Button
6. (TAPE) Pause Button
7. Cassette Compartment
8. CD Compartment
9. CD Eject Button
2. (TAPE) Play Button
3. (TAPE) Rewind Button
4. (TAPE) Fast Forward Button
5. (TAPE) Stop/Eject Button
6. (TAPE) Pause Button
7. Cassette Compartment
8. CD Compartment
9. CD Eject Button
10. (CD) Pause Button
(TUNER) Band Selector Button
11. Preset Memory Button
12. (CD) Stop Button
12. (CD) Stop Button
(TUNER) Tuning Down Button
13. (CD) Play/Repeat Button
(TUNER) Tuning Up Button
14. (CD) Track Up/Cue Button
(TUNER) Preset Up Button
15. (CD) Track Down/Review Button
(TUNER) Preset Down Button
16. Stand-by, On/Function Switch
17. Extra Bass Switch
18. Surround Switch (162H ONLY)
19. Volume Control
20. (CD) Play Indicator
21. (CD) Repeat Indicator
22. (CD) Pause Indicator
23. Memory Indicator
24. (TUNER) FM Stereo MOde Indicator
25. (TUNER) FM Stereo Indicator
26. Battery Compartment
27. FM Telescopic Rod Aerial
28. Headphone Socket
29. AC Power Input Socket
17. Extra Bass Switch
18. Surround Switch (162H ONLY)
19. Volume Control
20. (CD) Play Indicator
21. (CD) Repeat Indicator
22. (CD) Pause Indicator
23. Memory Indicator
24. (TUNER) FM Stereo MOde Indicator
25. (TUNER) FM Stereo Indicator
26. Battery Compartment
27. FM Telescopic Rod Aerial
28. Headphone Socket
29. AC Power Input Socket
Remote control (161H/162H ONLY)
30. (CD) Track Down/Review Button
(TUNER) Preset Down Button
31. (CD) Pause Button
(TUNER) Band Selector Button
32. (CD) Play/Repeat Button
(TUNER) Tuning Up Button
33. (CD) Track Up/Cue Button
(TUNER) Preset Up Button
34. (CD) Stop Button
(TUNER) Tuning Down Button
REMOTE CONTROL (161H/162H ONLY)
20 21 22 23 24 25
1 2 3 4 5
6 7 8 9
10
11
16
18 19
13
14
15
12
17
26
27
28 29
Illustration: QT-CD162H
30
31
32
33
34
15
15
Remote Sensor
0.2 m - 6 m
(8" - 20')
(8" - 20')
Notes:
Replace the batteries if the operating distance is
reduced or if the operation becomes erratic.
Periodically clean the transmitter LED on the
remote control and the sensor on the main unit
with a soft cloth.
Exposing the sensor on the main unit to strong
light may interfere with operation. Change the
lighting or the direction of the unit.
Keep the remote control away from moisture,
excessive heat, shock, and vibrations.
reduced or if the operation becomes erratic.
Periodically clean the transmitter LED on the
remote control and the sensor on the main unit
with a soft cloth.
Exposing the sensor on the main unit to strong
light may interfere with operation. Change the
lighting or the direction of the unit.
Keep the remote control away from moisture,
excessive heat, shock, and vibrations.
Illustration: QT-CD162H
QT-CD141H/161H/162H
– 5 –
1
Rear Cabinet
1. Screw ................. (A1) x10
5-1
2. Socket .................. (A2) x1
5-2
2
Top Cabinet
1. Knob ..................... (B1) x1
5-2
(with CD Mechanism/ 2. Screw ................... (B2) x3
Tape Mechanism/
Tape Mechanism/
3. Socket .................. (B3) x1
Main PWB)
3
Main PWB/
1. Screw ................... (C1) x9
5-3,6-1
Switch PWB/
2. Socket .................. (C2) x4
5-3,6-1
Headphones PWB 3. Soldering .............. (C3) x3
5-3
4
Surround PWB
1. Screw ................... (D1) x2
5-3
(162H Only)
5
Tape Mechanism
1. Screw ................... (E1) x4
6-1
6
CD Mechanism
1. Screw ................... (F1) x3
6-1
7
Terminal PWB
1. Screw ................... (G1) x5
6-2
2. Hook ..................... (G2) x1
8
Battery PWB
1. Hook ..................... (H1) x2
6-3
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 5-3
Figure 5-1
Figure 5-2
Headphones
PWB
PWB
(C1)x6
ø3x10mm
ø3x10mm
(C1)x2
ø3x10mm
ø3x10mm
Main PWB
Top Cabinet
(C2)x1
(C3)x3
(C2)x2
Switch
PWB
PWB
(D1)x2
ø3x10mm
ø3x10mm
SURROUND
PWB
PWB
162H ONLY
(A1)x3
ø3x12mm
ø3x12mm
(A1)x1
ø3x12mm
ø3x12mm
(A1)x6
ø3x20mm
ø3x20mm
Rear Cabinet
Front Cabinet
(B2)x2
ø3x10mm
ø3x10mm
(A2)x1
(B3)x1
Front Cabinet
Top Cabinet
(B1)x1
Main PWB
(B2)x1
ø3x10mm
QT-CD141H/161H/162H
– 6 –
CD MECHANISM SECTION
Perform steps 1, 2, 3 and 5 of the disassembly method to
remove the CD mechanism.
remove the CD mechanism.
How to remove the pickup (See Fig. 6-4.)
1. Remove the screws (A1) x 2 pcs., to remove the shaft (A2)
x1 pcs.
2. Remove the stop washer (A3) x1 pcs., to remove the gear
(A4) x 1 pcs.
3. Remove the pickup.
Figure 6-3
REMOVING AND REINSTALLING THE MAIN PARTS
Top Cabinet
Tape
Mechanism
CD Mechanism
(F1)x3
ø2.5x10mm
ø2.5x10mm
(C1)x1
ø2.5x8mm
ø2.5x8mm
(E1)x4
ø3x10mm
ø3x10mm
(C2)x1
(G1)x2
ø3x12mm
ø3x12mm
(G1)x1
ø3x10mm
ø3x10mm
(G1)x2
ø3x10mm
ø3x10mm
Terminal PWB
Driver
Push
(G2)x1
Rear Cabinet
Figure 6-4
(A1) x2
ø2.6 x6mm
ø2.6 x6mm
Stop
Washer
(A3) x1
Washer
(A3) x1
CD
Mechanism
Mechanism
Gear
(A4) x1
(A4) x1
Shaft
(A2) x1
(A2) x1
Pickup
Figure 6-2
Figure 6-1
Rear Cabinet
(H1)x1
(H1)x1
Battery PWB
Pull
Pull
QT-CD141H/161H/162H
– 7 –
MECHANISM SECTION
• Driving Force Check
PLAY: TW-2412
Over 120 g
Torque Meter
Specified Value
• Torque Check
Torque Meter
Specified Value
Play: TW-2111
25 to 65 g.cm
Fast Forward: TW-2231
60 to 130 g.cm
Rewind: TW-2231
60 to 130 g.cm
• Tape Speed
MTT-111 Variable
3,000
±
90 Hz
Output: Speaker
Resistor in
Teaminal
motor(M601)
(CNP201 Load
resistance: 8 ohms)
resistance: 8 ohms)
Instrument
Connection
Specified
Value
Test
Tape
TAPE SECTION
Position of each switch or control
Volume control
Max
Function switch
Tape/Power Off
X-BASS
On
Surround (162H ONLY)
On
• Bias Oscillation
Adjustment Point
• Playback Amplifier Sensitivity Check
Instrument Connection
Test Tape
MTT-118
1.8 V
±
3 dB
Speaker Terminal
(CNP201 Load resistance: 8 ohms)
(CNP201 Load resistance: 8 ohms)
Specified Value
ADJUSTMENT
Figure 7-2 ADJUSTMENT POINTS
• Head Azimuth
Torque Meter
Specified Value
MTT-114
Output: Speaker Terminal
(CNP201 Load resistance: 8 ohms)
(CNP201 Load resistance: 8 ohms)
Adjusting
Point
Specified Value
Instrument
Connection
L301
82 kHz
±
6 kHz
Pin 2 of CNP201
– 6 kHz
fL: Low-range frequency
fH: High-renge frequency
fH: High-renge frequency
IF
450 kHz
1,620 kHz
T3
*1
Band
—
522 kHz
(fL): L4
*3
Coverage
1.35
±
0.05 V
Tracking
600 kHz
600 kHz
(fL): L3
*2
1,400 kHz
1,400 kHz
(fH):TC1
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
TUNER SECTION
• FM RF
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Signal generator: 1 kHz, 75 kHz dev., FM modulated
Band
—
87.50 MHz
(fL): L2
*1
Coverage
2.0
±
0.1 V
RF
98.00 MHz
98.00MHz
L1
*2
(10~30 dB)
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
*1. Input: Antenna,
Output: TP1
*2. Input: Antenna,
Output: Speaker Terminal
• Detection
Signal generator: 10.7 MHz, FM sweep generator
Signal generator: 10.7 MHz, FM sweep generator
IF
10.7 MHz
98.00 MHz
T1 (Turn
Input: Pin 1 of
the core of
IC1
T1 fully
Output: TP2
counter-
clockwise.
clockwise.
Test
Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
*1. Input: Antenna,
Output: Pin19 of IC2
*2. Input: Antenna,
Output: Speaker Terminal
*3. Input: Input is not connected,
Output: TP1
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
Signal generator: 400 Hz, 30%, AM modulated
• VCO Frequency
Specified
Value
Instrument
Connection
VR1
76 kHz
±
200 Hz
Pin 13, pin 21 and
ground of IC2
ground of IC2
Adjusting Point
Note:
After preparing the test circuit shown in Fig. 7-1, connect the
Pin 13, Pin 21 and ground of the IC2 with the test circuit, and
measure the value. At this time, apply a standard unmodulated
signal input and adjust the VCO.
After preparing the test circuit shown in Fig. 7-1, connect the
Pin 13, Pin 21 and ground of the IC2 with the test circuit, and
measure the value. At this time, apply a standard unmodulated
signal input and adjust the VCO.
Figure 7-1 VCO FREQUENCY TEST CIRCUIT
Pin 13 of IC2
Pin 21 of IC2
D
G
S
10 kohm
TO FREQUENCY
COUNTER
COUNTER
FET : 2SK19 or 2SK54
1
1
VCO
VR1
IC2
T3
L4
L2
IC1
L1
FM IF
T1
TC1
AM TRACKING
L3
AM BAR
ANTENNA
FM ROD ANTENNA
FM BAND
COVERAGE
T2
AM IF
TP2
FM RF
FM DET.
TP1
13
17
19
21
R29
R7
AM BAND
COVERAGE
MAIN PWB
fL
fH
