Sharp QT-CD210 (serv.man3) Service Manual ▷ View online
QT-CD210H/W
– 9 –
TAPE MECHANISM SECTION
Perform steps 1 to 5 of the disassembly method to remove the
tape mechanism. (See page 8.)
tape mechanism. (See page 8.)
How to remove the record / playback and erase
heads (See Fig. 9-1.)
heads (See Fig. 9-1.)
1. Remove the screws (A1) x 2 pcs., to remove the record/
playback head.
2. Remove the hooks (A2) x 2 pcs., toward the center position
as shown in Fig. 5-1. and then extract the erase head
upward.
upward.
Note:
After replacing the heads and performing the azimuth
adjustment, be sure to apply screwlock.
After replacing the heads and performing the azimuth
adjustment, be sure to apply screwlock.
How to remove the pinch roller (See Fig. 9-2.)
1. Carefully bend the pinch roller pawl in the direction of the
arrow
<A>
, and remove the pinch roller (B1) x 1 pc.,
upwards.
How to remove the belts (See Fig. 9-3.)
1. Remove the main belt (C1) x 1 pc., from the motor pulley.
2. Remove the FF/REW belt (C2) x 1 pc., from the REW/FF
2. Remove the FF/REW belt (C2) x 1 pc., from the REW/FF
roller.
3. Put on the belts in the reverse order of removal.
Note:
When putting on the belt, ascertain that the belt is not twisted,
and clean it.
Note:
When putting on the belt, ascertain that the belt is not twisted,
and clean it.
How to remove the motor
(See Figs. 9-4.)
(See Figs. 9-4.)
1. Remove the mainbelt.
2. Remove the screw (D1) x 1 pc., to remove the motor mount.
3. Remove the screws (D2) x 2 pcs., to remove the motor.
Note:
When mounting the motor, pay attention to the motor mounting
angle.
2. Remove the screw (D1) x 1 pc., to remove the motor mount.
3. Remove the screws (D2) x 2 pcs., to remove the motor.
Note:
When mounting the motor, pay attention to the motor mounting
angle.
How to remove the flywheel (See Fig. 9-5.)
1. Remove the belt.
2. Remove the stop washer (E1) x 1 pc., with a small precision
2. Remove the stop washer (E1) x 1 pc., with a small precision
screwdriver to extract the flywheel from the capstan metal.
Note:
When the stop washer is deformed or damaged, replace it
with a new one.
When the stop washer is deformed or damaged, replace it
with a new one.
How to reinstall the parts
Install each part in the reverse order of the removal with care.
Figure 9-1
Figure 9-2
Figure 9-3
Figure 9-4
Figure 9-5
(A1) x1
ø2x7mm
ø2x7mm
(A1) x1
ø2x3mm
ø2x3mm
Record/Playback
Head
Head
Erase Head
Hook
(A2)x2
(A2)x2
<A>
Pinch Roller
(B1)x1
(B1)x1
Pinch Roller
Pawl
Pawl
Motor
REW/FF
Clutch Ass'y
Clutch Ass'y
Flywheel
FF/REW Belt
(C2)x1
(C2)x1
Main Belt
(C1)x1
(C1)x1
(E1) x 1
Stop Washer
Stop Washer
Washer
Flywheel
(D1)x1
Special
Screw
Special
Screw
Motor Mount
Motor
(D2)x2
Special
Screw
Special
Screw
Motor
Mount
Mount
Motor
QT-CD210H/W
– 10 –
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: 4 ohms)
resistance: 4 ohms)
Instrument
Connection
Specified
Value
Test
Tape
TAPE SECTION
Position of each switch or control
Volume control
Max
Function switch
Tape/Power Off
• Bias Oscillation
Adjustment Point
• Playback Amplifier Sensitivity Check
Instrument Connection
Test Tape
MTT-118
1.1 V
±
3 dB
Speaker Terminal
(Load resistance: 4 ohms)
(Load resistance: 4 ohms)
Specified Value
ADJUSTMENT
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
fH: High-range frequency
• FM IF/RF
FM Detection
T2
FM
fL: L2
Band Coverage
fH: TC2
FM Tracking
fL: 88.0 MHz: L1
fH: 108.0 MHz: TC1
fH: 108.0 MHz: TC1
Test Stage
Specified
Value/Adjusting
Point
Instrument
Connection
Input: Pin 1 of IC1
Output: Pin 18 of IC1
Output: Pin 18 of IC1
Iuput: Antenna
Output: Speaker
Terminal (CNP201
Load resistance: 4
ohms)
Output: Speaker
Terminal (CNP201
Load resistance: 4
ohms)
• AM IF/RF
AM IF
T3
Input: Antenna
Output: Pin 18 of IC1
Output: Pin 18 of IC1
AM
fL: L4
Input: Antenna
Band Coverage
fH: TC4
Output: Speaker
AM Tracking
fL: 600 kHz: L3
Terminal (CNP201
fH: 1,400 kHz: TC3
Load resistance: 4
ohms)
ohms)
Test Stage
Specified
Value/Adjusting
Point
Instrument
Connection
Figure 10 ADJUSTMENT POINTS
• Head Azimuth
Torque Meter
Specified Value
MTT-114
Output: Speaker Terminal
(CNP201 Load resistance: 4 ohms)
(CNP201 Load resistance: 4 ohms)
Adjusting
Point
Specified Value
Instrument
Connection
L301
82 kHz
±
6 kHz
Pin 1 of CNP101
TC4
TC2
TC1
TC3
FM ROD
ATENNA
MAIN PWB
1
13
18
AM BAND
COVERAGE
COVERAGE
fL
fH
FM
TRACKING
TRACKING
FM BAND
COVERAGE
COVERAGE
fL
fH
fH
fL
AM IF
FM
DETECTION
DETECTION
L4
12
24
BIAS OSC.
AM
TRACKING
TRACKING
fL
fH
IC803
L2
CNP101
SW102
IC101
CNP201
VR201
SW201
L1
T3
L301
CNP602
T2
IC1
AM BAR
ANTENNA
ANTENNA
1
12
11
2
1
2
3
4
1
1 2 3
L3
QT-CD210H/W
– 11 –
CD SECTION
Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary
to reajust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
to reajust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
TEST MODE
While holding down the "PLAY" button, move the FUNCTION/POWER switch to "CD".
Start
Note
1. When the CD LID switch is in the OFF position, (CD LID is open) the unit will be able to enter the test mode.
However, can use the "UP/CUE" and "DOWN/REVIEW" button only.
2. You can only move the pickup.
3. The LCD display should be the same as it is for normal CD operations.
3. The LCD display should be the same as it is for normal CD operations.
Operation
The use of the "UP/CUE" button will move the pickup to the outermost position.
The use of the "DOWN/REVIEW" button will move the pickup to the innermost position.
The use of the "DOWN/REVIEW" button will move the pickup to the innermost position.
After connecting of the 10k
Ω
resistor between IC802 27 pin and GND and holding down the "PLAY" button, move
the FUNCTION/POWER switch to "CD".
Start
Display
LCD MODE
1. Remove the front cabinet according to the disassembly method.
2. Short the TP of the Figure 11-1 to turn on the CD LID SW 810.
3. While holding down the "PLAY" button, move the FUNCTION/POWER switch to "CD".
4. Open the CD LID and press the PLAY button. The laser lights up for a few seconds. (At this time, the pickup lens moves up
2. Short the TP of the Figure 11-1 to turn on the CD LID SW 810.
3. While holding down the "PLAY" button, move the FUNCTION/POWER switch to "CD".
4. Open the CD LID and press the PLAY button. The laser lights up for a few seconds. (At this time, the pickup lens moves up
and down and adjusts the focus to check if there is a disc or not.)
LASER LIGHTING CONFIRMATION
Figure 11-1
OPEN/CLOSE
SW810
CD LID
CD LID
BK
BK
10
VC4
TC4
VC3
TC3
VC2
TC2
VC1
TC1
C843
R824
IC803
L2
IC802
R839
C855
C853
C8 6
R862
R844
C824
R846
R861
C21
C3
C2
L1
F1
R4
D2
C22
R7
R6
C11
C1
T3
BI803
R851
C825
R843
C842
R821
C823
R826
C827
R827
C826
R820
C841
C830
C838
R852
C8
2
C828
R828
C83
3
BK
WH
WH
WH
WH
WH
WH
WH
WH
WH
WH
WH
BI801
R80
2
C802
C801
R804
C815
C817
R801
Q801
R853
C839
C835
C834
C805
C807
C806
C856
R11
R8
R9
C16
C17
R10
COR1
T2
C13
C15
C20
C18
C19
C14
R3
C12
CF1
R1
CF3
IC1
C4
D1
C10
R5
C9
C8
C7
C6
R2
L4
CNS801
8
7
6
5
4
3
2
1
7
6
5
4
3
2
1
1
1
6
1
5
10
15
20
25
30 31
35
40
45
50
51
55
60
65
70
75
80
81
85
90
95
100
1
B C E
5
10
15
16
20
25
30
1
2
3
1 2 3
1 2 3
1
5
10
12
13
15
20
24
C5
MAIN PWB-A1
WH
GY
GY
GY
GY
GY
2
3
12
13
5
16
17
7
TP
QT-CD210H/W
– 12 –
A
B
C
D
E
F
G
H
1
2
3
4
5
6
• The numbers
1
to
17
are waveform numbers shown in page 17.
Figure 12 SCHEMATIC DIAGRAM (1/2)
C856
0.001
0.001
C832
47/16
47/16
C22
0.1/50
0.1/50
L80
0.82
0.82
D801
1N4004
1N4004
L4
AM OSC.
Q803
KRC107 M
SWITCHING
KRC107 M
SWITCHING
R850
1.5K
1.5K
Q802
KTA1273 Y
SWITCHING
KTA1273 Y
SWITCHING
C806
330/16
330/16
C805
0.022
0.022
C21
2P(CH)
2P(CH)
R3
220K
C13
220/10
R126
100
100
C122
0.01
0.01
R10
2.2K
2.2K
R11
2.2K
2.2K
COR1
CORE
CORE
SW201-C
SW201-B
C1
0.022
C20
0.047
C2
18P
(CH)
18P
(CH)
T3
CF3
460KHz
460KHz
C14
0.022
IC1
TA2111N
9
8
7
6
5
4
3
2
1
T2
F1
FM BAND
PASS FILTER
D1
1N4148
R2
2.7K
2.7K
C4
4P(CH)
4P(CH)
C3
24P(UJ)
24P(UJ)
L2
VC3
CNP101
BI802
BI801
C817
100/10
D2
1N4148
R6
100
100
C854
0.0068
C807
0.047
0.047
R456
15K
15K
R455
15K
15K
R457
1K
1K
R458
1K
1K
R7
120
120
R853
2.2K
R852
2.2K
R110
120
120
D101
1N4148
R123
3.3K
3.3K
R124
3.3K
3.3K
R851
2.2K
C816
0.022
0.022
IC801
TA2109F
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
C814
0.047
0.047
C813
47/16
47/16
C106
0.0027
0.0027
R106
10K
10K
R114
8.2K
8.2K
R105
10K
10K
C107 820P
C114
47/16
47/16
D102 1N4148
C118
10/16
10/16
R102
150
150
C109
270P
270P
R109
120
120
C115
0.018(ML)
0.018(ML)
R116
3.9K
3.9K
R115
3.9K
3.9K
C111
330P
330P
C105
0.0027
0.0027
R122
1.8K
1.8K
R802
2.2K
2.2K
C815
47/16
47/16
BI803
R120
3.3K
C110
270P
270P
C113
47/16
47/16
C802
0.022
0.022
C804
2P
(CH)
2P
(CH)
R811
22K
22K
R5
3.3K
3.3K
C6
330P
330P
CF1
10.7MHz
C11
0.47/50
C15
10P
(CH)
10P
(CH)
R1
330
C12
4.7/50
4.7/50
C17
1/50
C19
0.01
0.01
(ML)
C16
1/50
C18
0.01(ML)
R9
10K
C10
1/50
1/50
C7
2.2/50
2.2/50
C9
0.1/50
C8
0.1/50
R4
2.2K
R8
10K
R820
47K
47K
R833
3.3K
3.3K
C841
0.047
0.047
C833
0.033(ML)
0.033(ML)
C838
0.047(ML)
0.047(ML)
R830
10K
C839
0.047(ML)
0.047(ML)
R831
3.3K
3.3K
C835
470P
470P
C834
470P
470P
R827
15K
15K
C836
0.047(ML)
0.047(ML)
C825
47/16
47/16
C826
47P
47P
C837
0.047(ML)
0.047(ML)
R828
10K
10K
C829
0.0047
0.0047
C828
0.0027
0.0027
C830
0.01(M
0.01(M
C123
220/10
220/10
C822
0.047
0.047
Q801
KTA1266 GR
SWITCHING
SWITCHING
C818
56P
56P
C821
100/10
100/10
R803
82K
82K
C117
10/16
10/16
IC101
BA3311L
BA3311L
9
8
7
6
5
4
3
2
1
C108
820P
820P
R121
1.8K
1.8K
C116
0.018(ML)
0.018(ML)
R801
22
C863
47/16
47/16
C842
0.047
0.047
C843
47/16
47/16
IC803
LA6541D
LA6541D
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
R804
68K
68K
C819
0.1(ML)
0.1(ML)
R117
3.9K
3.9K
R113
8.2K
8.2K
C820
0.1(ML)
0.1(ML)
R806
2.7K
2.7K
R805
39K
39K
R807
1K
1K
L301
BIAS OSC.
C351
0.0022
(ML)
0.0022
(ML)
R
1
1
C121
0.01
C120
47/16
C119 2.2/50
R125
680K
680K
C112
330P
330P
R101
150
150
R118
3.9K
3.9K
R351
100
100
C3
0.
0.
C352
100/10
100/10
R119
3.3K
3.3K
R104
12K
R103
12K
12K
C801
0.01
0.01
SW102-A
SW102-F
SW102-E
SW102-B
SW102-C
SW102-H
SW102-G
SW102-D
NC
NC
NC
NC
NC
CNS101
FM
AM
4
3
R-CH
L-CH
TRO
FOO
DMO
FMO
VCC
VREF
CD
RES
REG IN
REG OUT
VIN4
VIN3
VIN2
GND
GND
GND
GND
GND
GND
VG4
VG3
VG2
VO4-
VO4+
VO3-
VO3+
VO2+
VO2-
VO1-
VO1+
VG1
VIN1
MT
VCC
AM OSC.
FM ANT
ST LED
TUN LED
AM RF
IN
FM RF
OUT
RF GND
L3
AM BAR ANTENNA
LPF1
AM/FM
LPF2 VCO
GND
AM IF IN
FM IF IN
AM AGC
AM LOW CUT
CNS802
CNS801
CNS803
R-CH(CD)
L-CH(CD)
RF
VCC
FM
OSC
AM
OSC
VCC
FM
AFC
DET
MPX IN
CNP803
FM ROD
ANTENNA
ANTENNA
ALC T
FILTER
VCC
GND
NF1
NF2
IN2
IN1
OUT2
OUT1
R
P
R
R
P
R
P
P
P
R
R
R
R
L-CH
R-CH
PRE AMP
ERASE HEAD
TAPE
AM
FM
CD
CD
TAPE
FM OSC.
AM ANT
FM OSC.
AM IF
L-CH
R-CH
FM RF IN
MIX OUT
FM DET
P
+
+
-
-
SP+
SP-
SL+
SL-
PU-IN
LD
K
E
E
K
LD
VR
PD
G
B
B
A
F
F
F
C
TR+
TR-
FO+
FO-
R-
R+
F+
F-
2200P
2200P
PICK-UP UNIT
CD MOTOR PWB-B
M701
SLED
MOTOR
M702
SPINDLE
MOTOR
FC-
FC+
TR-
TR+
GND
PD
VR
LD
GND
K
F
B
E
A
VCC
FNI
FPI
TPI
TNI
MDI
LDO
SEL
TEB
2VRO
TEN
TEO
RFN
GND
RFO
AGCI
RFGC
RFGO
RFIS
RFRP
VRO
FEN
FEO
SBAD
MON
1M
1M
SLT-
SLT+
FM-
FM+
DM-
DM+
6
4
3
2
1
13
17
16
15
14
12
8
9
10
11
2
1
3
1
6
2
4
5
3
16 17 18
4
4
5
6 5 4
1
5
4
3
2
6
5
5
6
7
8
1
2
3
4
9 8 7
3 2 1
2
1
3
4
3
2
1
2
1
3
2
M
3
1
19 20 21
5
1
2
3
4
4
3
2
1
M
1
4
6
3
2
1
1
2
3
22 23 24
2
3
4
5
6
1
5
1
2
3
4
2
8
7
6
4
13 14
15
12 11
10
2
5
6
7
8
3
4
5
6
1
2
SW702
PICKUP IN
PICKUP IN
A
NC
NC
NC
NC
NC
NC
1
2
3
L1
FM IF
FM IF
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
1 2 3
10 11 12
13
14
15
16
17
18
19
20
21
22
23
24
11
12
10
P
P
NC
VC1
VC2
VC4
TC3
TC4
TC2
TC1
NC
NC
NC
IC801
SERVO PRE AMP.
TA2109F
IC803
FOCUS/
TRACKING/
SPIN/
SLED DRIVER
LA6541D
IC1
FM/AM IF MPX.
TA2111N
FM IF
AM IF
SW102
RECORD/PLAYBACK
RECORD/PLAYBACK
SW102
RECORD/
PLAYBACK
RECORD/
PLAYBACK
IC101
REC./
P.B. EQUALIZER AMP.
BA3311L
REC./
P.B. EQUALIZER AMP.
BA3311L
SW201
FUNCTION
SELECTOR
FUNCTION
SELECTOR
MAIN PWB-A1
RECORD/
PLAYBACK HEAD
PLAYBACK HEAD
TAPE
SW102
RECORD/
PLAYBACK
RECORD/
PLAYBACK
SW
R
PL
R
PL
FM DETECTION
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO.
VOLTAGE
IC1
0.82V(0V)
0V(0V)
0.35V(1.03V)
3.81V(3.82V)
0V(0.13V)
3.92V(3.86V)
3.39V(3.18V)
3.92V(3.86V)
0V(0V)
0V(0.14V)
0.32V(0.32V)
3.14V(3.29V)
0V(0V)
0.35V(1.03V)
3.81V(3.82V)
0V(0.13V)
3.92V(3.86V)
3.39V(3.18V)
3.92V(3.86V)
0V(0V)
0V(0.14V)
0.32V(0.32V)
3.14V(3.29V)
21
20
19
18
17
16
15
14
13
24
23
22
PIN
NO.
VOLTAGE
1.22V(1.22V)
1.22V(1.22V)
3.20V(3.14V)
3.14V(3.92V)
0.7V(0.70V)
1.08V(1.01V)
0.4V(1.02V)
3.92V(3.85V)
3.92V(3.86V)
3.92V(3.86V)
3.92V(3.86V)
3.92V(3.82V)
1.22V(1.22V)
3.20V(3.14V)
3.14V(3.92V)
0.7V(0.70V)
1.08V(1.01V)
0.4V(1.02V)
3.92V(3.85V)
3.92V(3.86V)
3.92V(3.86V)
3.92V(3.86V)
3.92V(3.82V)
( ): AM
9
8
7
6
5
4
3
2
1
12
11
10
PIN
NO.
VOLTAGE
IC801
4.84V
2.04V
2.04V
2.12V(0V)
2.11V(0V)
0.18V(0V)
2.84V(0V)
2.41V(0V)
2.05V
4.08V
2.05V
2.08V
2.04V
2.04V
2.12V(0V)
2.11V(0V)
0.18V(0V)
2.84V(0V)
2.41V(0V)
2.05V
4.08V
2.05V
2.08V
21
20
19
18
17
16
15
14
13
24
23
22
PIN
NO.
VOLTAGE
2.86V(0.99V)
2.12V
2.05V
2.05V
2.63V(1.15V)
2.04V
2.07V
2.17V
2.04V
1.47V(0.77V)
0V
2.05V
2.12V
2.05V
2.05V
2.63V(1.15V)
2.04V
2.07V
2.17V
2.04V
1.47V(0.77V)
0V
2.05V
( ): CD STOP
9
8
7
6
5
4
3
2
1
15
11
10
PIN
NO.
VOLTAGE
IC803
8.15V
1.08V
2.12V
2.10V
4.0V
3.42V
0V
0V
0V
3.85V
3.60V
2.09V
2.09V
6.02V
7.47V
1.08V
2.12V
2.10V
4.0V
3.42V
0V
0V
0V
3.85V
3.60V
2.09V
2.09V
6.02V
7.47V
24
23
22
21
20
19
18
17
16
30
26
25
PIN
NO.
VOLTAGE
0V
0.24V
2.13V
2.09V
4.03V
3.38V
0V
0V
0V
3.70V
3.71V
2.09V
2.11V
2.10V
8.14V
0.24V
2.13V
2.09V
4.03V
3.38V
0V
0V
0V
3.70V
3.71V
2.09V
2.11V
2.10V
8.14V
13
12
14
28
27
29
3.72V
(5.0V)
( ): CD STOP
1.87V
(1.45V)
2.97V
(4.39V)
( ): CD STOP
8.21V
(8.3V)
(8.3V)
8.15V
(8.3V)
(8.3V)
7.48V
(7.59V)
(7.59V)
0V
(0V)
(0V)
0V
(0V)
(0V)
4.97V(5.0V)
1.88V
0V
0.6V
0V
0V
0V
0V
4.67V
0V
4.62V
0.6V
1.89V
VOLTAGE:
PLAY and REC
PLAY and REC
AM
TRACKING
TRACKING
fH
fL
TC3
L3
L3
AM BAND
COVERAGE
COVERAGE
fH
fL
TC4
L4
L4
FM BAND
COVERAGE
COVERAGE
fH
fL
TC2
L2
L2
FM
TRACKING
TRACKING
fH
fL
TC1
L1
L1
SW102
RECORD/
PLAYBACK
RECORD/
PLAYBACK
SW102
RECORD/
PLAYBACK
RECORD/
PLAYBACK
+B
+B
+B
+B
+B
+B
2
3
8
9
10
C5
2P(CH)
2P(CH)
L107
CHOKE
COIL
CHOKE
COIL
L108
CHOKE
COIL
CHOKE
COIL
Click on the first or last page to see other QT-CD210 (serv.man3) service manuals if exist.