DOWNLOAD Sharp CD-DP2400E (serv.man8) Service Manual ↓ Size: 245.24 KB | Pages: 6 in PDF or view online for FREE

Model
CD-DP2400E (serv.man8)
Pages
6
Size
245.24 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System / Disassembly, removing reinstalling of main parts and adjustment
File
cd-dp2400e-sm8.pdf
Date
PREV: Sharp CD-DP2400E (serv.man7) Service Manual

Sharp CD-DP2400E (serv.man8) Service Manual ▷ View online

CD-DP2400E
– 10 –
How to remove the pickup (See Fig. 10-2)
1. Remove the stop washer (B1) x 1 pc., to remove the gear
(B2).
2. Remove the screws (B3) x 2 pcs., to remove the shaft (B4).
3. Remove the pickup.
CD MECHANISM SECTION
Perform steps 1, 2, 3, and 13 to 15 of the disassembly method
to remove the CD mechanism.(See Page 6)
How to remove the loading motor
(See Fig. 10-1)
1. Bend the hooks (A1) x 5 pcs., to remove the loading motor.
Note
After removing the connector for the optical pickup from the
connector wrap the conductive aluminium foil around the front
end of connector so as to protect the optical pickup from
electrostatic damage.
(A1)x2
(A1)x1
Loading Motor
CD Base
(A1)x2
(B3) x2
  ø2.6 x6mm
Shaft
(B4) x1
Stop Washer
(B1) x1
Gear
(B2) x1
CD Mechanism
Pickup
ADJUSTMENT
MECHANISM SECTION
•••••
 Driving Force Check
Torque Meter
Specified Value
Play: TW-2111
Tape 1: Over 80 g
Tape 2: Over 80 g
•••••
 Torque Check
Torque Meter
Tape 2
Play: TW-2111
30 to 80 g. cm
30 to 80 g.cm
Fast forward: TW-2231
—
70 to 180 g.cm
Rewind: TW-2231
—
70 to 180 g.cm
Specified Value
Tape 1
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
Normal
MTT-111
Variable
3,000 
±
Speaker
speed
Resistor in
30 Hz
terminal
motor.
(Load
(MM1)
resistance:
6 ohms)
•••••
 Tape Speed
TAPE MECHANISM
Motor
Variable Resistor in motor
Figure 10-2
Figure 10-1
Figure 10-3
– 11 –
CD-DP2400E
CD SECTION
•••••     
 AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna
Output: TP302
*2. Input: Antenna
Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
AM IF
450 kHz
1,620 kHz
T351
*1
AM Band
—
522 kHz
(fL): T306
*2
Coverage
1.1 
±
 0.1 V
AM Tracking 990 kHz
990 kHz
(fL): T303
*1
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
CD ERROR CODE DESCRIPTION
Error
State Code
[Servo System Error]
0001
Cannot detect Pickup-in SW
0002
DSP access error
[Error during close operation]
0101
Open/Close SW Low 
→ 
High not functioning
0103
Open/Close SW High 
→
 Low not functioning
[Error during open operation]
0201
Open/Close SW Low 
→ 
High not functioning
0203
Open/Close SW High 
→
 Low not functioning
[Error during skip operation]
0302
Pickup-in SW is not detected
0306
During Disc 1 search, Open/Close SW or Clamp SW
or Disc SW do not change to low.
0307
Clamp SW Low 
→ 
High not functioning
0308
Clamp SW High 
→
 Low not functioning
Items adjusted automatically
(1) Offset adjustment (The offset voltage between the head
amplifier output and the VREF reference voltage is
compensated inside the IC.)
  * Focus offset adjustment
  * Tracking offset adjustment
(2) Tracking balance adjustment (waveform drawing Fig.
11-2 EFBL)
(3) Gain adjustment (The gain is compensated inside the IC
so that the loop gain at the gain crossover frequency will
be 0dB.)
  * Focus gain adjustment
  * Tracking gain adjustment
•  Adjustment
T
T
EFBL
FDO
TE
Stopped
CH1=500mV
DC   10:1
CH2=200mV
DC   10:1
CH3=1V
DC   10:1
500ms/div
(500ms/div)
NORM:20kS/s
1
2
3
=Record Length=
Smoothing :   ON
CH1  :      0.000V
CH2  :      0.000V
Main  :     100K
Zoom  :       2k
Mode  :   SINGLE
Type   :   EDGE CH1
Delay  :                    0.0ns
Hold off  :                0.2
µ
s
CH3  :        0.00V
CH4  :        0.00V
BW   : FULL
=Trigger=
=Filter=
=Offset=
CH2
  v/DIV
   200mV
1999/04/05  20:26:47
T303
CF301
T351
CF352
CF351
CF302
IC303
T306
IC302
FE301
CNP301
 SO301
FM75 ohms
 AM LOOP
ANTENNA
MAIN PWB
AM Tracking
AM Band Coverage
AM IF
TP301
TP302
R357
Figure 11-1 ADJUSTMENT POINT
Figure 11-2
– 11 –
CD-DP2400E
CD SECTION
•••••     
 AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna
Output: TP302
*2. Input: Antenna
Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
AM IF
450 kHz
1,620 kHz
T351
*1
AM Band
—
522 kHz
(fL): T306
*2
Coverage
1.1 
±
 0.1 V
AM Tracking 990 kHz
990 kHz
(fL): T303
*1
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
CD ERROR CODE DESCRIPTION
Error
State Code
[Servo System Error]
0001
Cannot detect Pickup-in SW
0002
DSP access error
[Error during close operation]
0101
Open/Close SW Low 
→ 
High not functioning
0103
Open/Close SW High 
→
 Low not functioning
[Error during open operation]
0201
Open/Close SW Low 
→ 
High not functioning
0203
Open/Close SW High 
→
 Low not functioning
[Error during skip operation]
0302
Pickup-in SW is not detected
0306
During Disc 1 search, Open/Close SW or Clamp SW
or Disc SW do not change to low.
0307
Clamp SW Low 
→ 
High not functioning
0308
Clamp SW High 
→
 Low not functioning
Items adjusted automatically
(1) Offset adjustment (The offset voltage between the head
amplifier output and the VREF reference voltage is
compensated inside the IC.)
  * Focus offset adjustment
  * Tracking offset adjustment
(2) Tracking balance adjustment (waveform drawing Fig.
11-2 EFBL)
(3) Gain adjustment (The gain is compensated inside the IC
so that the loop gain at the gain crossover frequency will
be 0dB.)
  * Focus gain adjustment
  * Tracking gain adjustment
•  Adjustment
T
T
EFBL
FDO
TE
Stopped
CH1=500mV
DC   10:1
CH2=200mV
DC   10:1
CH3=1V
DC   10:1
500ms/div
(500ms/div)
NORM:20kS/s
1
2
3
=Record Length=
Smoothing :   ON
CH1  :      0.000V
CH2  :      0.000V
Main  :     100K
Zoom  :       2k
Mode  :   SINGLE
Type   :   EDGE CH1
Delay  :                    0.0ns
Hold off  :                0.2
µ
s
CH3  :        0.00V
CH4  :        0.00V
BW   : FULL
=Trigger=
=Filter=
=Offset=
CH2
  v/DIV
   200mV
1999/04/05  20:26:47
T303
CF301
T351
CF352
CF351
CF302
IC303
T306
IC302
FE301
CNP301
 SO301
FM75 ohms
 AM LOOP
ANTENNA
MAIN PWB
AM Tracking
AM Band Coverage
AM IF
TP301
TP302
R357
Figure 11-1 ADJUSTMENT POINT
Figure 11-2
– 11 –
CD-DP2400E
CD SECTION
•••••     
 AM IF/RF
Signal generator: 400 Hz, 30%, AM modulated
*1. Input: Antenna
Output: TP302
*2. Input: Antenna
Output: TP301
TUNER SECTION
fL: Low-range frequency
fH: High-renge frequency
AM IF
450 kHz
1,620 kHz
T351
*1
AM Band
—
522 kHz
(fL): T306
*2
Coverage
1.1 
±
 0.1 V
AM Tracking 990 kHz
990 kHz
(fL): T303
*1
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
CD ERROR CODE DESCRIPTION
Error
State Code
[Servo System Error]
0001
Cannot detect Pickup-in SW
0002
DSP access error
[Error during close operation]
0101
Open/Close SW Low 
→ 
High not functioning
0103
Open/Close SW High 
→
 Low not functioning
[Error during open operation]
0201
Open/Close SW Low 
→ 
High not functioning
0203
Open/Close SW High 
→
 Low not functioning
[Error during skip operation]
0302
Pickup-in SW is not detected
0306
During Disc 1 search, Open/Close SW or Clamp SW
or Disc SW do not change to low.
0307
Clamp SW Low 
→ 
High not functioning
0308
Clamp SW High 
→
 Low not functioning
Items adjusted automatically
(1) Offset adjustment (The offset voltage between the head
amplifier output and the VREF reference voltage is
compensated inside the IC.)
  * Focus offset adjustment
  * Tracking offset adjustment
(2) Tracking balance adjustment (waveform drawing Fig.
11-2 EFBL)
(3) Gain adjustment (The gain is compensated inside the IC
so that the loop gain at the gain crossover frequency will
be 0dB.)
  * Focus gain adjustment
  * Tracking gain adjustment
•  Adjustment
T
T
EFBL
FDO
TE
Stopped
CH1=500mV
DC   10:1
CH2=200mV
DC   10:1
CH3=1V
DC   10:1
500ms/div
(500ms/div)
NORM:20kS/s
1
2
3
=Record Length=
Smoothing :   ON
CH1  :      0.000V
CH2  :      0.000V
Main  :     100K
Zoom  :       2k
Mode  :   SINGLE
Type   :   EDGE CH1
Delay  :                    0.0ns
Hold off  :                0.2
µ
s
CH3  :        0.00V
CH4  :        0.00V
BW   : FULL
=Trigger=
=Filter=
=Offset=
CH2
  v/DIV
   200mV
1999/04/05  20:26:47
T303
CF301
T351
CF352
CF351
CF302
IC303
T306
IC302
FE301
CNP301
 SO301
FM75 ohms
 AM LOOP
ANTENNA
MAIN PWB
AM Tracking
AM Band Coverage
AM IF
TP301
TP302
R357
Figure 11-1 ADJUSTMENT POINT
Figure 11-2
Page of 6
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