Sharp CD-C470E (serv.man3) Service Manual ▷ View online
– 9 –
CD-C470H,C470E,C480H/CP-C470H,C470E,C480H
Figure 9-1
Figure 9-2
STEP
REMOVAL
PROCEDURE
FIGURE
1
Front Speaker
1. Net ........................... (A1) x1
9-1
(Left/Right)
2. Front Panel ............. (A2) x1
3. Screw ...................... (A3) x6
STEP
REMOVAL
PROCEDURE
FIGURE
1
Top Cabinet
1. Screw ...................... (B1) x6
9-2
STEP
REMOVAL
PROCEDURE
FIGURE
1
Top Cabinet
1. Screw ...................... (C1) x9
9-3
( A3 ) x2
ø4 x16mm
ø4 x16mm
( A3 ) x4
ø4 x16mm
ø4 x16mm
Screwdriver
Net
( A1 ) x1
( A1 ) x1
Front Pael
( A2 ) x1
( A2 ) x1
Tweeter
Super Tweeter
Woofer
Figure 9-3
(B1)x2
ø3x20mm
ø3x20mm
(B1)x2
ø3x20mm
ø3x20mm
(B1)x2
ø3x20mm
ø3x20mm
Woofer
(C1)x2
ø3x20mm
ø3x20mm
(C1)x3
ø3x20mm
ø3x20mm
(C1)x4
ø3x20mm
ø3x20mm
CP-C470H/CP-C470E/CP-C480H
CENTER SPEAKER SYSTEM
SURROUND SPEAKER SYSTEM
CP-C470H/CP-C470E/CP-C480H
CENTER SPEAKER SYSTEM
SURROUND SPEAKER SYSTEM
CD-C470H,C470E,C480H/CP-C470H,C470E,C480H
– 10 –
Figure 10-2
How to remove the pickup (See Fig. 10-2)
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. 10-1)
(See Fig. 10-1)
1. Remove the screws (A1) x 2 pcs., to remove the turntable
up/down motor.
Figure 10-1
( 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
– 11 –
CD-C470H,C470E,C480H/CP-C470H,C470E,C480H
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
VRM1
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 11-1 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
R357
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
CD-C470H,C470E,C480H/CP-C470H,C470E,C480H
– 12 –
TEST MODE
2
1
TO
TE
200 ms
1V/diV
IC 1 15
1V/diV
IC 1 15
200 ms
1V/diV
IC 1 7
1V/diV
IC 1 7
TRACKING/
ERROR
BARANCE
ADJUST
ERROR
BARANCE
ADJUST
Figure 12-2
Figure 12-3
2
1
10ms
0.50 V
IC1 20 FE
0.50 V
IC1 20 FE
10ms
0.50 V
IC1 7 TE
0.50 V
IC1 7 TE
Enlarged
View
View
TRACKING
OFF-SET
ADJUST
OFF-SET
ADJUST
Since this CD system incorporates the following automatic adjustment function, when the pickup is replaced, it is not necessary
to readjust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
to readjust it.
Since this CD unit does not need adjustment, the combination of PWB and laser pickup unit is not restricted.
• Automatic adjustment item
1. Focus offset (Fig. 12-2)
2. Tracking offset (Fig. 12-3)
3. E/F balance (tracking error balance) (Fig. 12-4)
4. RF level AGC function (HF level: constant)
5. RF level automatic follow-up of the tracking gain
1. Focus offset (Fig. 12-2)
2. Tracking offset (Fig. 12-3)
3. E/F balance (tracking error balance) (Fig. 12-4)
4. RF level AGC function (HF level: constant)
5. RF level automatic follow-up of the tracking gain
This automatic adjustment is performed each time a disc is changed. Therefore,
each disc is played back using the optimal settings.
each disc is played back using the optimal settings.
CD SECTION
Figure 12-1
Note:
Only in STOP state it is possible to slide the pickup with the (
) or (
) key.
VOL. --- Last memory
BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF
BAL. --- CENTER
R.GEQ. --- FLAT
X-BAS --- OFF
Canceling method - POWER OFF
• Setting the test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <CD> + <POWER> TEST: CD operation test
• TEST mode
Function — CD test mode
Any one of test mode can be set by pressing several keys as follows.
<REC. PAUSE> + <CD> + <POWER> TEST: CD operation test
• TEST mode
Function — CD test mode
Setting of TEST mode
Indication of CD TST mode (Fig. 12-1)
OPEN/CLOSE operation is manual operation.
The pickup can be moved by using the (
) or (
) key.
<MEMORY>
LASER ON
LASER ON
<PLAY> key input
Press <STOP> key.
Stop
TOC. IL is performed, and the ordinary PLAY is performed.
If the following key is pressed during PLAY, it is possible
to specify directly any Track No.
<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9
<Disc Number 3> key: Track 15
If the following key is pressed during PLAY, it is possible
to specify directly any Track No.
<Disc Number 1> key: Track 4
<Disc Number 2> key: Track 9
<Disc Number 3> key: Track 15
<MEMORY>
Tracking on the spot.
SERVO OFF PLAY
Tracking on the spot.
SERVO OFF PLAY
<MEMORY>
Tracking on the spot.
SERVO ON PLAY
SERVO ON PLAY
STOP
2
0.1s
0.50 V
IC1 20 FE
0.50 V
IC1 20 FE
0.1s
0.50 V
IC1 7 TE
0.50 V
IC1 7 TE
1
FOCUS
OFF-SET
ADJUST
OFF-SET
ADJUST
TRACKING
OFF-SET
ADJUST
OFF-SET
ADJUST
Figure 12-4
IL is not performed.
<STOP>
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