Read Sharp CD-XP300 (serv.man10) Service Manual online
CD-XP300H
– 14 –
How to remove the pickup (See Fig. 14-2)
1. Remove the stop washer (B1) x 1 pc., to remove the gear
(B2) x 1 pc.
2. Remove the screws (B3) x 2 pcs., to remove the shaft
(B4) x 1 pc.
3. Remove the pickup.
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.
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.
Figure 14-2
CD MECHANISM SECTION
Perform steps 1, 2, 3, 10, 11,12 and 13 of the disassembly
method to remove the CD mechanism.
method to remove the CD mechanism.
How to remove the loading motor
(See Fig. 14-1)
(See Fig. 14-1)
1. Bend the hooks (A1) x 6 pcs., to remove the loading motor.
Figure 14-1
ADJUSTMENT
MECHANISM SECTION
•
Driving Force Check
Torque Meter
Specified Value
Play: TW-2111
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 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
±
30 Hz
Speaker
speed
Resistor in
Terminal
motor.
(Load
resistance:
6 ohms)
resistance:
6 ohms)
•
Tape Speed
Figure 14-3
(B3) x 2
ø2.6 x 6mm
ø2.6 x 6mm
Shaft
(B4) x 1
(B4) x 1
Stop Washer
(B1) x 1
(B1) x 1
Gear
(B2) x 1
(B2) x 1
CD Mechanism
Pickup
TAPE MECHANISM
Tape
Motor
Motor
Variable Resistor in motor
(A1) x 6
Loading
Motor PWB
Motor PWB
Loading
Motor
Motor
Loading
Tray
Tray
– 15 –
CD-XP300H
Figure 15-2
CD ERROR CODE DESCRIPTION
Error
Explanation
01
When Pickup set inner position, inner switch
cannot detect 'ON' level for 10 secs.
cannot detect 'ON' level for 10 secs.
When tray moves to Open/Close, Open/Close switch
10*
cannot detect 'ON' level for 7 secs.
When disc table rotate to target position.
Clamp switch cannot detect 'ON' level for 7 secs.
When disc table rotate to target position.
Clamp switch cannot detect 'ON' level for 7 secs.
When disc table set to Disc1 position for 1 st time,
11*
"CLAMP SW", "DISC NO SW" and "OPEN/CLOSE"
cannot detect 'ON' level for 14 secs.
cannot detect 'ON' level for 14 secs.
31
When it changes to CD function, DSP cannot read
initial data.
initial data.
T
T
EFBL
FDO
TE
Stopped
CH1=500 mV
DC 10:1
CH2=200 mV
DC 10:1
CH3=1 V
DC 10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
2
3
=Record Length=
Smoothing : ON
CH1 : 0.000 V
CH2 : 0.000 V
CH2 : 0.000 V
Main : 100 K
Zoom : 2 k
Zoom : 2 k
Mode : SINGLE
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
Type : EDGE CH1
Delay : 0.0 ns
Hold off : 0.2
µ
s
CH3 : 0.00 V
CH4 : 0.00 V
CH4 : 0.00 V
BW : FULL
=Trigger=
=Filter=
=Offset=
CH2
v/DIV
200 mV
v/DIV
200 mV
1999/04/05 20:26:47
Test Stage
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
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-range frequency
fH: High-range 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
Figure 15-1 ADJUSTMENT POINTS
Items adjusted automatically
(1) Offset adjustment (The offset voltage between the head
amplifier output and the VREF reference voltage is
compensated inside the IC.)
compensated inside the IC.)
* Focus offset adjustment
* Tracking offset adjustment
* Tracking offset adjustment
(2) Tracking balance adjustment (waveform drawing
Fig.15-2 EFBL)
(3) Gain adjustment (The gain is compensated inside the IC
so that the loop gain at the gain crossover frequency will
be 0 dB.)
be 0 dB.)
* Focus gain adjustment
* Tracking gain adjustment
* Tracking gain adjustment
• Adjustment
AM IF
TP301
TP302
R381
R357
T303
T306
L354
T351
CNP301
AM LOOP
ANTENNA
AM LOOP
ANTENNA
AM BAND
COVERAGE fL
COVERAGE fL
AM TRACKING
fL
fL
MAIN PWB
FE301
SO301
FM ANTENNA
TERMINAL
FM ANTENNA
TERMINAL
* 'CHECKING'
If Error is detected, 'CHECKING' will be display instead of 'ER-
CD**' display. 'ER-CD**' display will only be display when
error had been detected for the 5 th times.
If Error is detected, 'CHECKING' will be display instead of 'ER-
CD**' display. 'ER-CD**' display will only be display when
error had been detected for the 5 th times.
• FM IF
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.
Display
