Sharp CD-C440H (serv.man2) Service Manual ▷ View online
– 7 –
CD-C440H/CP-C440H
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 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 suffcient care on static electricity of integrated
circuits and other circuits when servicing.
Figure 7-2
Figure 7-3
1
Top Cabinet
1. Screw ..................... (A1) x4
7-1
2
Side Panel
1. Screw ..................... (B1) x6
7-1
(Left/right)
3
CD Player Unit/
1. Turn on the power supply,
7-2
CD Tray Cover
open the disc tray, take out
the CD cover, and close.
(Note 1)
2. Hook ....................... (C1) x3
3. Hook ....................... (C2) x2
4. Screw ..................... (C3) x1
5. Socket .................... (C4) x4
the CD cover, and close.
(Note 1)
2. Hook ....................... (C1) x3
3. Hook ....................... (C2) x2
4. Screw ..................... (C3) x1
5. Socket .................... (C4) x4
4
Back Board
1. Screw ..................... (D1) x8
7-2
5
Main PWB/
1. Screw ..................... (E1) x5
8-1
Tuner PWB
2. Holder .................... (E2) x2
3. Flat Wire ................. (E3) x4
4. Socket .................... (E4) x4
3. Flat Wire ................. (E3) x4
4. Socket .................... (E4) x4
6
Headphones PWB 1. Screw ..................... (F1) x1
8-1
7
Front Panel
1. Screw ..................... (G1) x2
8-1
8
Display PWB/
1. Screw ..................... (H1) x3
8-2
Switch PWB
2. Screw ..................... (H2) x11
9
Tape Mechanism 1. Open the cassette holder.
8-2
2. Screw...................... (J1) x6
10
Power Amp. PWB 1. Screw ..................... (K1) x4
8-3
11
Turntable
1. Screw ..................... (L1) x1
8-4
2. Cover ..................... (L2) x1
12
Disc Tray
1. Screw ..................... (M1) x2
8-4
2. Guide ..................... (M2) x2
13
CD Changer
1. Screw ..................... (N1) x4
8-5
Mechanism
14
CD Mechanism
1. Screw ..................... (P1) x1
8-5
STEP
REMOVAL
PROCEDURE
FIGURE
Note 1:
How to open the changer manually. (Fig. 7-3)
1. Insert the tip of fine screwdriver into the hole of CD player
How to open the changer manually. (Fig. 7-3)
1. Insert the tip of fine screwdriver into the hole of CD player
base, and press down the worm wheel < A > .
2. Then, turn fully the lock lever in the arrow direction through
the hole on the loading chassis bottom in this state.
After that, push forward the CD player base.
After that, push forward the CD player base.
Figure 7-1
( B1 ) x2
ø3 x8mm
ø3 x8mm
( B1 ) x2
ø3 x8mm
ø3 x8mm
( B1 ) x2
ø3 x8mm
ø3 x8mm
Top Cabinet
Side Panel
(Right)
(Right)
Rear Panel
Side Panel
(Left)
(Left)
( A1 ) x2
ø3 x12mm
ø3 x12mm
( A1 ) x2
ø3 x12mm
ø3 x12mm
CD Tray Cover
CD Player Unit
( D1 ) x2
ø3 x10mm
ø3 x10mm
( E1 ) x2
ø3 x10mm
ø3 x10mm
( D1 ) x1
ø3 x10mm
ø3 x10mm
( D1 ) x3
ø3 x8mm
ø3 x8mm
( C3 ) x1
ø3 x8mm
ø3 x8mm
( D1 ) x2
ø3 x8mm
ø3 x8mm
Hook
( C1) x3
( C1) x3
( C4 ) x4
( E4 ) x1
( C2 ) x1
Back
Board
Board
Main PWB
Tuner
PWB
PWB
Front Panel
1
1
2
Pull
A
(C2)x1
< A >
LOCK
LEVER
LEVER
CD-C440H
CD-C440H
STEP
REMOVAL
PROCEDURE
FIGURE
1
Speaker
1. Net Frame Ass'y ..... (A1) x1
8-6
2. Duct Front Panel .... (A2) x1
3. Screw ...................... (A3) x4
3. Screw ...................... (A3) x4
8-7
4. Screw ...................... (A4) x4
CP-C440H
CD-C440H/CP-C440H
– 8 –
Figure 8-1
Figure 8-2
Figure 8-3
Figure 8-4
Care when installing the CD changer mechanism.
Install the CD changer mechanism on the CD player base after
the shift lever has been set in the highest position.
Install the CD changer mechanism on the CD player base after
the shift lever has been set in the highest position.
Figure 8-5
Figure 8-6
Figure 8-7
Main PWB
( G1 ) x2
ø3 x8mm
ø3 x8mm
( F1 ) x1
ø3 x10mm
ø3 x10mm
( E1 ) x2
ø3 x12mm
ø3 x12mm
( E4 ) x3
( E3 ) x1
Front Panel
Tape
Mechanism
Mechanism
( E1 ) x1
ø3 x10mm
ø3 x10mm
Push
Push
Headphon
PWB
PWB
( E3 ) x2
( E3 ) x1
( E2 ) x2
Display
PWB
PWB
Switch PWB
Tape
Mechanism
Mechanism
Open
Cassette
Holder
(Left/Right)
Holder
(Left/Right)
Front Panel
( J1 ) x6
ø3 x10mm
ø3 x10mm
( H2 ) x11
ø3 x10mm
ø3 x10mm
( H1 ) x3
ø3 x10mm
ø3 x10mm
Power Supply PWB
( K1 ) x4
ø3 x10mm
ø3 x10mm
Power Amp.
PWB
PWB
( M1 ) x1
ø3 x10mm
ø3 x10mm
( M1 ) x1
ø3 x10mm
ø3 x10mm
( L1 ) x1
ø3 x10mm
ø3 x10mm
Turntable
Disc Tray
( L2 ) x1
( M2 ) x1
( M2 ) x1
CD Player Unit
( N1 ) x4
ø3 x14mm
ø3 x14mm
( P1 ) x1
ø2.6 x10mm
ø2.6 x10mm
CD Changer
Mechanism
Mechanism
CD Mechanism
Shift Lever
CD Player Base
CP-C440H
SHARP
Front Panel
(A1) x1
Speaker Box
Screw
driver
driver
Driver should be pried
away from speaker Box.
away from speaker Box.
Direction of handle
Speaker Box
(A2) x4
4 x12mm
4 x12mm
(A2) x4
3 x10mm
3 x10mm
Woofer
– 9 –
CD-C440H/CP-C440H
Figure 9-2
How to remove the pickup (See Fig. 9-2)
1. Remove the screws (B1) x 2 pcs., to remove the shaft (B2).
2. Remove the stop washer (B3) x 1 pc., to remove the gear
2. Remove the stop washer (B3) x 1 pc., to remove the gear
(B4).
3. Remove the pickup.
REMOVING AND REINSTALLING THE MAIN PARTS
CD MECHANISM SECTION
Perform steps 1, 2, 3, 14 and 15 of the disassembly method
to remove the CD mechanism.
to remove the CD mechanism.
How to remove the turntable up/down motor
(See Fig. 9-1)
(See Fig. 9-1)
1. Remove the screws (A1) x 2 pcs., to remove the turntable
up/down motor.
Figure 9-1
( B1 ) x2
2.6 x6mm
2.6 x6mm
Shaft
( B2 ) x1
( B2 ) x1
Stop Washer
( B3 ) x1
( B3 ) x1
Gear
( B4 ) x1
( B4 ) x1
CD Mechanism
Pickup
( A1 ) x2
ø2 x5mm
ø2 x5mm
Turntable Up/Down Motor
CD-C440H/CP-C440H
– 10 –
MECHANISM SECTION
• Driving Force Check
Torque Meter
Specified Value
Play: TW-2412
Tape 1: Over 80 g
Tape 2: Over 80 g
Tape 2: Over 80 g
• Torque Check
Torque Meter
Tape 2
Play: TW-2111
30 to 60 g. cm
30 to 100 g.cm
Fast forward: TW-2231
—
50 to 100 g.cm
Rewind: TW-2231
—
50 to 100 g.cm
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Normal
MTT-111
VRM01
3,000
±
Speaker
speed
30 Hz
terminal
ADJUSTMENT
Specified Value
Tape 1
• Tape Speed
fL: Low-range frequency
fH: High-renge frequency
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
• AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
IF
450 kHz
1,620 kHz
T351
*1
MW Band
—
522 kHz
(fL): T306
*2
Coverage
1.1
±
0.1 V
MW
990 kHz
990 kHz
(fL): T302
*1
Tracking
LW Band
LW Band
—
153 kHz
(fL): T305
*2
Coverage
1.5
±
0.1 V
LW
225 kHz
225 kHz
(fL): T301
*1
Tracking
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
• FM
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Notes:
1: Description of the "FM IF Adjustment" is not carried on this
Manual. It is because the IF coil in the FM front end section
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
has been best adjusted in the factory so that its further
adjustment is not needed at the field. When replacing the
FM front end assembly, no adjustment is needed either.
2: The parts in the FM front end section are prepared in a
complete unit, so you can't obtain each part individually
Adjusting
Parts
Instrument
Connection
Frequency
Display
Frequency
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Signal generator: 1 kHz, 40 kHz dev., FM modulated
98.00 MHz
98.00 MHz
VR351*
Input: Antenna
(25 dB
µ
V)
Output: Speaker
Terminal
Terminal
Figure 10-1 ADJUSTMENT POINTS
TUNER SECTION
*1. Input: Antenna,
Output: TP302
*2. Input: Antenna,
Output: TP301
VRM1
TAPE
SPEED
SPEED
TAPE MECHANISM PWB
TUNER PWB
TP301
CNP301
SO301
ANTENNA
TERMINAL
ANTENNA
TERMINAL
FE301
TP302
T351
T306
T305
T302
T301
VR351
AM IF
FM MUTE
LEVEL
LEVEL
MW BAND
COVERAGE
COVERAGE
MW
TRACKING
TRACKING
LW
TRACKING
TRACKING
LW BAND
COVERAGE
COVERAGE
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