Sharp XL-T300 (serv.man20) Service Manual ▷ View online
– 9 –
XL-T300H
Figure 9-1
Chassis
(E1) x3
ø3 x10mm
ø3 x10mm
(E1) x2
ø3 x10mm
ø3 x10mm
(D1) x1
ø3 x10mm
ø3 x10mm
(E1) x1
ø3 x10mm
ø3 x10mm
(D1) x1
ø3 x8mm
ø3 x8mm
(C1) x1
ø3 x8mm
ø3 x8mm
(C2) x1
(C1) x1
ø3 x12mm
ø3 x12mm
(E1) x2
ø3 x14mm
ø3 x14mm
(E2) x2
(E2) x1
(D2) x1
(D2) x1
Main PWB
Tuner PWB
Terminal
PWB
PWB
Figure 9-3
Top Cabinet
CD
Mechanism
Mechanism
CNW909
Tape
Mechanism
Mechanism
(F1) x4
ø2.5 x10mm
ø2.5 x10mm
(G1) x4
ø3 x10mm
ø3 x10mm
Holder PWB
Hook
(L2) x4
(L2) x4
Holder PWB
Top Panel
(L1) x3
ø2.5 x10mm
ø2.5 x10mm
(K1) x1
ø2.5 x10mm
ø2.5 x10mm
(H2) x1
(L1) x4
ø2.5 x8mm
ø2.5 x8mm
(J1) x1
ø2.5 x8mm
ø2.5 x8mm
(H1) x2
ø2.5 x10mm
ø2.5 x10mm
(H1) x1
ø2.5 x10mm
ø2.5 x10mm
Switch PWB
LED PWB
Switch PWB
Gear Box
Display PWB
( A3 ) x2
ø3 x12mm
ø3 x12mm
( A4 ) x4
ø4 x12mm
ø4 x12mm
( A2 ) x2
Special screw
Special screw
Net Frame
( A1 ) x1
( A1 ) x1
( A2 ) x2
Special screw
Special screw
Woofer
Tweeter
Figure 9-2
1
Speaker
1. Net Frame ........... (A1) x1
9-4
2. Special Screw ..... (A2) x4
3. Screw .................. (A3) x2
4. Screw .................. (A4) x4
3. Screw .................. (A3) x2
4. Screw .................. (A4) x4
STEP
REMOVAL
PROCEDURE
FIGURE
Figure 9-4
XL-T300H
– 10 –
TAPE MECHANISM SECTION
Perform steps 1 and 7 of the disassembly method to remove
the tape mechanism. (See page 8,9.)
the tape mechanism. (See page 8,9.)
How to remove the record / playback and erase
heads (See Fig. 10-1.)
heads (See Fig. 10-1.)
1. Remove the screws (A1) x 2 pcs., to remove the erase
head.
2. Remove the screws (A2) x 2 pcs., to remove the record/
playback head.
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. 10-2.)
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. 10-3.)
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. 10-4.)
(See Figs. 10-4.)
1. Remove the mainbelt.
2. Remove the screws (D1) x 2 pcs., to remove the motor
2. Remove the screws (D1) x 2 pcs., to remove the motor
bracket.
3. Remove the screws (D2) x 3 pcs., to remove the motor.
Note:
When mounting the motor, pay attention to the motor mounting
angle
Note:
When mounting the motor, pay attention to the motor mounting
angle
<A>
Pinch Roller
(B1)x1
(B1)x1
Pinch Roller
Pawl
Pawl
REMOVING AND REINSTALLING THE MAIN PARTS
Main Belt
(C1)x1
(C1)x1
FF/REW Belt
(C2)x1
(C2)x1
REW/FF
Clutch
Clutch
Motor
Erase Head
Record/
Playback Head
Playback Head
(A1)x2
ø2x8mm
ø2x8mm
(A2)x1
ø2x3mm
ø2x3mm
(A2)x1
ø2x7mm
ø2x7mm
(D1)x1
ø2x4mm
ø2x4mm
(D2)x3
Special
Screw
Special
Screw
Motor
Bracket
Bracket
Motor
Motor
(D1)x1
ø2x4mm
ø2x4mm
Figure 10-1
Figure 10-2
Figure 10-3
Figure 10-4
How to remove the flywheel (See Fig. 10-5.)
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.
Stop
Washer
Washer
Driver
(E1)x1
Stop Washer
Stop Washer
Mechanism
Chassis
Chassis
Washerx2
Flywheel
Figure 10-5
– 11 –
XL-T300H
How to remove the tape mechanism PWB
(See Fig. 11-1.)
(See Fig. 11-1.)
1. Remove the screws (F1) x 1 pc., to remove the tape
mechanism PWB.
2. Remove the screws (F2) x 1 pc.
3. Remove the solder joints (F3) x 2 pcs., to remove the tape
3. Remove the solder joints (F3) x 2 pcs., to remove the tape
mechanism PWB.
Tape
Mechanism
PWB
Mechanism
PWB
Tape
Mechanism
PWB
Mechanism
PWB
(F3)x2
Solder
Joint
Solder
Joint
(F2)x1
ø2x8mm
ø2x8mm
(F1)x1
ø2x3mm
ø2x3mm
Figure 11-1
Figure 11-2
How to remove the CD lid (See Fig. 11-2.)
Perform steps 1 and 8 of the disassembly method to remove
the gear box.(See page 8,9)
1. Remove the screws (A1) x 2 pcs., to remove the CD lid
motor.
2. Remove the hooks (A2) x 3 pcs., to remove the worm wheel.
Caution:
Be careful so that the gear is not damaged.
(The damage gear emits noise during searching.)
motor.
2. Remove the hooks (A2) x 3 pcs., to remove the worm wheel.
Caution:
Be careful so that the gear is not damaged.
(The damage gear emits noise during searching.)
(A1) x2
ø2 x5mm
ø2 x5mm
Hook
(A2) x3
(A2) x3
CD Lid Motor
Figure 11-3
CD MECHANISM SECTION (See Fig. 11-3.)
Perform steps 1 and 6 of the disassembly method to remove
the CD mechanism.(See page 8,9)
1. Remove the mechanism cover, paying attention to the
the CD mechanism.(See page 8,9)
1. Remove the mechanism cover, paying attention to the
pawls (A1)x 4 pcs.
2. Remove the screws (A2) x 2 pcs., to remove the shaft (A3)
x 1 pc.
3. Remove the stop washer (A4) x 1 pc., to remove the gear
(A5) x 1 pc.
4. Remove the pickup unit.
Note:
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector remove to pretect the optical pickup
from electrostatic damage.
(A5) x 1 pc.
4. Remove the pickup unit.
Note:
After removing the connector for the optical pickup from the
connector, wrap the conductive aluminium foil around the
front end of connector remove to pretect the optical pickup
from electrostatic damage.
Pickup unit
(A2) x2
ø2.6 x6mm
ø2.6 x6mm
(A1) x4
CD Mechanism
Shaft
(A3) x1
(A3) x1
Gear
(A5) x1
(A5) x1
Stop Washer
(A4) x1
(A4) x1
Mechanism Cover
XL-T300H
– 12 –
MECHANISM SECTION
• Driving Force Check
Torque Meter
Specified Value
Play: TW-2412
Over 80 g
• Torque Check
Torque Meter
Play: TW-2111
30 to 60 g. cm
Fast forward: TW-2231
55 to 140 g.cm
Rewind: TW-2231
55 to 140 g.cm
Specified
Value
Adjusting
Point
Instrument
Connection
Test Tape
ADJUSTMENT
Specified Value
• Tape Speed
AM
GND
FM
75
OHMS
ANTENNA
TERMINAL
TERMINAL
SO301
T302
FE301
T306
IC303
T351
VR351
TP301
FM Mute
Level
Level
AM Band
Coverage fL
Coverage fL
AM
Tracking fL
Tracking fL
AM IF
IC302
20
TUNER PWB-C1
MTT-111
Variable
3,000
±
Headphone
resistor in
90 Hz
terminal
motor.(M901)
TAPE MECHANISM
M901
Tape
Motor
Tape
Motor
Variable
resistor
resistor
Figure 12-2 ADJUSTMENT POINTS
Figure 12-1 ADJUSTMENT POINTS
Adjusting
Parts
Display
Frequency
• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated
Signal generator: 1 kHz, 40 kHz dev., FM modulated
*1. Adjust so that an output signal appears.
Check Point
Instrument
Connection
Display
Frequency
87.5 MHz
87.5 MHz
2.2 V
±
0.7 V
TP301
108 MHz
108 MHz
7.3 V
±
1.0 V
TP301
• Check FM VT
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*1
Input: SO301
(30 dB
µ
V)
Output: Speaker
Terminal
Terminal
Instrument
Connection
TUNER SECTION
• Setting the Test Mode
Keeping the FF/FWD button and MEMORY/SET button
pressed, turn on ON/STAND-BY. Then, the frequency is
initially set in the memory as shown in Table. Call it with the
VOLUME UP/DOWN button to use it for adjustment and check
of tuner circuit.
Keeping the FF/FWD button and MEMORY/SET button
pressed, turn on ON/STAND-BY. Then, the frequency is
initially set in the memory as shown in Table. Call it with the
VOLUME UP/DOWN button to use it for adjustment and check
of tuner circuit.
Preset No.
FM
Preset No.
AM
1
87.50 MHz
6
522 kHz
2
108.00 MHz
7
1,620 kHz
3
98.00 MHz
8
990 kHz
4
90.00 MHz
9
603 kHz
5
106.00 MHz
10
1,404 kHz
*1. Input: Antenna,
Output: Speaker Terminal
*2. Input: Input is not connected,
Output: TP301
Frequency
Frequency
Display
Setting/
Adjusting
Parts
Instrument
Connection
AM IF
450 kHz
1,620 kHz
T351
*1
AM Band
—
522 kHz
(fL): T306
*2
Coverage
1.1
±
0.1 V
AM
990 kHz
990 kHz
(fL): T302
*1
Tracking
fL: Low-range frequency
fH: High-range frequency
fH: High-range frequency
Signal generator: 400 Hz, 30%, AM modulated
• AM IF/RF
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