SHARP WF-2100W Service Manual
WF-2100W
SERVICE MANUAL
No. S2213WF2100WS
PORTABLE STEREO COMPONENT SYSTEM
MODEL WF-2100W(S)
PORTABLE STEREO COMPONENT SYSTEM
MODEL WF-2100W(BK)
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
CONTENTS
Page
SPECIFICATIONS .............................................................................................................................................................. 2
VOLTAGE SELECTION...................................................................................................................................................... 2
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR .................................................................................................. 2
NAMES OF PARTS ............................................................................................................................................................ 3
DISASSEMBLY................................................................................................................................................................... 4
REMOVING AND REINSTALLING THE MAIN PARTS...................................................................................................... 5
ADJUSTMENT .................................................................................................................................................................... 6
FITTING OF DIAL POINTER .............................................................................................................................................. 8
NOTES ON SCHEMATIC DIAGRAM ................................................................................................................................. 8
TYPES OF TRANSISTOR AND LED.................................................................................................................................. 9
VOLTAGE ........................................................................................................................................................................... 9
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD.............................................................................................. 10
PARTS GUIDE / EXPLODED VIEW
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
WF-2100W
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
SPECIFICATIONS
General
Power source: AC 110-127 V/220-240 V,
50/60 Hz
DC 15 V [“D” size
(UM/SUM-1, R20 or HP-2)
battery × 10]
Power consumption: 33 W
Output power: MPO (Max.); 50 W (25 W +
25 W)
(AC operation)
RMS; 25 W (12.5 W + 12.5 W)
(DC operation, 10 % T.H.D.)
Input terminal: Mixing microphone; 1 mV/600 ohms
CD/LINE; 350 mV/47 kohms
Output terminal: Headphones; 16-50 ohms
(recommended; 32 ohms)
Dimensions: Width; 282 mm (11-1/8")
Height; 217 mm (8-9/16")
Depth; 207 mm (8-1/8")
Weight: 3.5 kg (7.7 lbs.) without batter-
ies
Radio section
Frequency range: FM; 88 - 108 MHz
SW1; 2.3 - 7.3 MHz
SW2; 7.3 - 22 MHz
MW; 526.5 - 1,606.5 kHz
Tape recorder section
Frequency response: 60 - 12,000 Hz (Normal tape)
Signal/noise ratio: 40 dB (TAPE 1, recording/playback)
Wow and flutter: 0.3 % (WRMS)
Motor: DC 9 V electric governor
Bias system: AC bias
Erase system: Magnet erase
50 dB (TAPE 2, playback)
Speaker section
Speakers:
Maximum input power: 25 W
Rated input power: 12.5 W
Impedance: 8 ohms
Dimensions: Width; 235 mm (9-1/4")
Weight: 2.0 kg (4.4 lbs.)/each
9 cm (3-9/16") woofer × 1
7.5 cm (3") woofer × 1
5 cm (2") tweeter × 1
Super tweeter × 1
Height; 235 mm (9-1/4")
Depth; 192 mm (7-9/16")
Specifications for this model are subject to change without
prior notice.
VOLTAGE SELECTION
Before operating the unit on mains, check the preset voltage. If the voltage is different from your local voltage, adjust the voltage
as follows. Slide the selector with a screwdriver to the appropriate voltage number. (AC 110 - 127 V or AC 220 - 240 V).
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
QACCA0004AW00
QACCE0007AW00
QPLGA0003AWZZ QPLGA0004AWZZ
– 2 –
NAMES OF PARTS
1. Function Selector Switch
2. Power/(TAPE 2) Play Direction Indicators
3. Dubbing Speed/Built-in Microphone/FM Mode Switch
4. Graphic Equalizer Controls
5. Volume Control
6. Surround Switch (with Indicator)
7. Fine Tuning Control
8. Tuning Control
9. Built-in Microphone
10. Extra Bass Control
11. Headphone Socket
12. (TAPE 1) Cassette Compartment
13. FM Stereo Indicator
14. Band Selector Switch
15. Mixing Microphone Socket
16. (TAPE 2) Cassette Compartment
17. (TAPE 1) Record Button
18. (TAPE 1) Play Button
19. (TAPE 1) Rewind Button
20. (TAPE 1) Fast Forward Button
21. (TAPE 1) Stop/Eject Button
22. (TAPE 1) Pause Button
23. (TAPE 2) Reverse Mode Switch
24. (TAPE 2) Play Button
25. (TAPE 2) Fast Wind Buttons
26. (TAPE 2) Stop/Eject Button
27. (TAPE 2) Direction Switch
1
245678
3
9
10
11
12
17 18 19 20 21
23 24 25 26 27
28 29 30
WF-2100W
13
14
15
16
22
31
32
28. FM/SW Telescopic Rod Aerial
29. CD/Line Input Sockets
30. Beat Cancel Switch
31. Speaker Terminals
32. AC Voltage Selector
33. AC Power Input Socket
34. Battery Compartment
35. Woofer
36. Super Tweeter
37. Tweeter
38. Bass Reflex Duct
39. Speaker Release Lever
40. Speaker Wire
– 3 –
35
36
37
38
33
34
39
40
WF-2100W
Rear
Cabinet
Power
Transformer
Power PWB
(D1)x1
ø3x8mm
(A3)x1
ø3x6mm
(A2)x1
Rod Antenna
Spring
Speaker
Release
Lever
Speaker Cord
Holder
Speaker
Cord
Driver
(A2)x1
Woofer
Woofer
Tweeter
(A3)x4
ø3x8mm
(A3)x4
ø3x8mm
(B1)x2
ø3x8mm
(A1)x5
ø4x16mm
Main Unit
Speaker Box
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 out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit and remove
the batteries from the unit.
3. Take off nylon bands or wire holders where they need
to be removed when disassembling the unit. After
servicing the unit, be sure to rearrange the leads where
they were before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
Front Cabinet
Fine Tuning PWB
(B2)x2
ø2.6x8mm
Main PWB
(C1)x5
ø3x10mm
(B2)x4
ø3x8mm
Graphic
Equalizer PWB
(B2)x1
ø3x10mm
(B1)x1
Nut
Washer
(B4)x1
Open
MAIN UNIT
STEP REMOVAL PROCEDURE FIGURE
1 Front Cabinet/ 1. Screw .................. (A1) x9 4-1
Rear Cabinet 2. Socket ................. (A2) x1 4-3
3. Screw .................. (A3) x1
2 Main PWB/ 1. Knob.................... (B1) x1 4-2
Graphic Equalizer 2. Screw .................. (B2) x7
PWB/Fine Tuning 3. Socket ................. (B3) x4
PWB 4. Mic ...................... (B4) x1
3 Tape Mechanism 1. Open the cassette holder. 4-2
2. Screw .................. (C1) x5
4 Power PWB 1. Screw .................. (D1) x1 4-3
SPEAKER UNIT
STEP REMOVAL PROCEDURE FIGURE
1 Woofer 1. Screw .................. (A1) x5 4-4
2. Front Panel ......... (A2) x1
3. Screw .................. (A3) x8
2 Tweeter 1. Screw .................. (B1) x2 4-4
MAIN UNIT SPEAKER UNIT
(B3)x4
Figure 4-2
Figure 4-3
Tape
Mechanism
Cassette
Holder
(A1)x1
ø3x8mm
(A1)x3
ø3x14mm
(A1)x1
ø3x14mm
(A1)x1
ø3x30mm
(A1)x2
ø3x14mm
Rear
Cabinet
Figure 4-1
Front
Cabinet
(A1)x1
ø3x8mm
Figure 4-4
– 4 –
REMOVING AND REINSTALLING THE MAIN PARTS
Record/Playback
Head
Erase
Head
(A1)x1
ø2x3mm
(A1)x1
ø2x7mm
Hook
(A2)x2
TAPE 1
TAPE 2
(B1)x1
ø2x6mm
(B1)x1
ø2x6mm
Playback
Head
TAPE MECHANISM SECTION
Perform steps 1, 2 and 3 of the disassembly method to
remove the tape mechanism. (See page 4.)
How to remove the record/playback and erase
heads (TAPE 1) (See Fig. 5-1)
1. When you remove the screws (A1) x 2 pcs., the recording/
playback head can be removed.
2. Move the hooks (A2) x 2 pcs., toward the center position as
shown in Fig. 5-1 and then lift the erase head.
How to remove the playback head (TAPE 2)
(See Fig. 5-2)
1. When you remove the screws (B1) x 2 pcs., the playback
head can be removed.
How to remove the pinch roller (TAPE 1/2)
(See Fig. 5-3)
1. Carefully bend the pinch roller pawl in the direction of the
arrow <A>, and remove the pinch roller (C1) x 1 pc. and
(C2) x 1 pc., in the direction of the arrow <B>.
Note:
When installing the pinch roller, pay attention to the spring
mounting position.
WF-2100W
Figure 5-1
How to remove the motor (See Fig. 5-4)
1. Remove the belt.
2. Remove the screws (D1) x 4 pcs., to remove the motor
bracket.
3. Remove the screws (D2) x 3 pcs., to remove the motor.
How to remove the belt (TAPE 1)
(See Fig. 5-5)
1. Remove the main belt (E1) x 1 pc., from the motor side.
2. Remove the FF/REW belt (E2) x 1 pc.
How to remove the belt (TAPE 2)
(See Fig. 5-5)
1. Remove the main belt (F1) x 1 pc., from the motor side.
2. Remove the FF/REW belt (F2) x 1 pc.
Motor
TAPE 2
Main
Belt
(F1)x1
TAPE 2
Main Belt
(F1)x1
REW/FF
Clutch Ass'y
TAPE 1
Main Belt
(E1)x1
Motor
REW/FF
Belt
(E2)x1
TAPE 1
REW/FF
Clutch Ass'y
<B>
TAPE 1
Figure 5-2
Pinch Roller
(C1)x1
Pinch Roller
Pawl
<A>
Figure 5-3
(D1)x2
ø2x4mm
TAPE 2
<B>
(D1)x2
ø2x4mm
Motor
Motor
Bracket
(D2)x3
Special Screw
Motor
Bracket
Pinch Roller
(C2)x1
Pinch Roller
Pawl
<A>
REW/FF
Belt
(F2)x1
Main
Belt
(E1)x1
Figure 5-5
Motor
Figure 5-4
– 5 –
WF-2100W
ADJUSTMENT
MECHANISM SECTION
• Driving Force Check
Torque Meter
Play: TW-2412 Tape 1: Over 60 g
Specified Value
Tape 2: Over 50 g
• Torque Check
Torque Meter
Play: TW-2111 30 to 70 g.cm 27 to 60 g.cm
Fast Forward: TW-2231 Over 55 g.cm 55 to 120 g.cm
Rewind: TW-2231 Over 55 g.cm 55 to 120 g.cm
Specified Value
Tape 1 Tape 2
• Head Azimuth
Test Tape
MTT-114 Headphones Socket
Instrument Connection
(Load resistance: 32 ohms)
• Tape Speed (Normal only)
Test Tape
MTT-111 Tape 1, Tape 2: 3,000 ± 60 Hz Headphones
Adjustment
Point
VR501 Socket
Specified
Value
Instrument
Connection
(Load resistance:
32 ohms)
DECK SECTION
• Bias Oscillation
Adjustment Point Specified value Instrument
T201 100 kHz + 4 kHz Pin 5 of CON202
• Beat Cancel Switch: A
Specified Value
Beat Cancel A: 100 ± 4 kHz
B: 94 ± 4 kHz
C: 104 ± 4 kHz
Connection
TUNER SECTION
fL: Low-range frequency
fH: High-range frequency
• FM IF/RF
Test Stage
FM IF T108 Input: FM Antenna
FM Detection T106
FM Band fL: L101 Input: Antenna
Coverage fH: TC1 Output: Headphones
FM Tracking fL (88.0 MHz): L102
Specified Value/
Adjusting Point
fH (108 MHz): TC2
• AM IF/RF
Test Stage
AM IF T107 Input: Antenna
MW Band fL: T103 Input: Antenna
Coverage fH: TC3 Output: Headphones
MW Tracking fL (600 kHz): L103
SW1 Band fL (2.3 MHz): T104
Coverage fH (7.3 MHz): CT102
SW1 fL (2.6 MHz): T101
Tracking fH (6 MHz): CT104
SW2 Band fL (7.3 MHz): T105
Coverage fH (22 MHz): CT101
SW2 fL (8.5 MHz): T102
Tracking fH (19 MHz): CT103
Specified Value/
Adjusting Point
fH (1,400 kHz): TC4
• VCO Frequency
Adjustment
Point
VR102 76 kHz ± 200 Hz Pin 13, Pin 21 and ground
Specified value Instrument Connection
Note:
After preparing the test circuit shown in Fig. 6, connect the Pin
13, Pin 21 and ground of the IC102 with the test circuit, and
measure the value.
Instrument
Connection
Output: Pin 9 of IC102
Socket
(Load resistance: 32 ohms)
Instrument
Connection
Output: Pin 9 of IC102
Socket
(Load resistance 32 ohms)
of IC102
• Playback Amplifier Sensitivity Check
Test tape
MTT-118 2.5 V ± 3 dB Speaker terminal
Specified value Instrument Connection
(Load resistance: 8 ohms)
Pin 13 of IC102
– 6 –
Pin 21 of IC102
D
G
10 pF
1 Mohm
10 kohm
FET: 2SK212
(or Other 2SK Type FET.)
S
0.1 µF
TO FREQUENCY
COUNTER
Figure 6 VCO FREQUENCY TEST CIRCUIT
WF-2100W
MW BAND
COVERAGE fL
MW
TRACKING fH
MW BAND
COVERAGE fH
T102
CT103
CT102
CT104
T101
SW1 BAND
COVERAGE
fH
T103
TC4
TC3
fL
T104
TC2
TC1
CT101
L101
L103
T105
L102
fL
FM
TRACKING
fH
SW2 BAND
COVERAGE
fH fL
AM IF
T107
fH
FM BAND
COVERAGE
fL
9
T108
FM IF
13
IC102
21
VCO
VR102
FM DET.
T106
fH
fL
SW2
TRACKING
fHfL
SW1
TRACKING
TAPE
SPEED
MAIN PWB
MW
TRACKING fL
T201
BIAS
OSC.
SW202
VR501
MAIN PWB
Figure 7 ADJUSTMENT POINTS
– 7 –
WF-2100W
FITTING OF DIAL POINTER
1. Remove the Main PWB, the Graphic Equalizer PWB and
the Fine Tuning PWB. (See Figure 4-2 in the "Disassembly" on page 4.)
2. Remove the dial pointer guide and PWB.
3. Insert the dial pointer from , lead it under , hang it on
the tuner gear and then pass it through .
4. Replace the Main PWB, the Graphic Equalizer PWB and
the Fine Tuning PWB.
5. Rotate the tuning knob in the arrow direction until it stops.
(Set the tuner variable capacitor to "0" point (F-LOW
state).)
6. Adjust the dial pointer so that its stopper becomes the
Figure 8-2 position. (Adjust the engagement of the pointer
gear and the tuner gear to get the minimum space between
the PWB and the stopper.) This position is the "0" point.
7. Screw up the PWB and the dial pointer guide.
A
B
C
Front Cabinet
Tuning Knob
C
Dial Pointer Guide
(256)
Make the minimum space.
Stopper
PWB
Tuner
Gear
B
Main PWB
Fine Tuning
PWB
Screw(605)
ø3x8mm
Figure 8-1
PWB
Dial Pointer(207)
A
Dial Pointer(207)
Dial Pointer
"0" Point
Graphic Equalizer
PWB
NOTES ON SCHEMATIC DIAGRAM
• Resistor:
To differentiate the units of resistors, The symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol
is an ohm resistor. The resistor designated “Fusible” is a
fuse type resistor.
• Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means pico-farad and the unit of the capacitor
without such a symbol is microfarad. As to electrolytic
capacitor, the expression “capacitance/withstand voltage”
is used.
(CH),(RH),(UJ): Temperature compensation
(ML): Mylar type
(S): Styrol type
• The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the
chassis with no signal given.
• Schematic diagram and Wiring Side of P.W. Board for this
model are subject to change for improvement without prior
notice.
• Parts marked with “ ” ( ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
Pointer Gear
Tuner Gear
Front Cabinet
Main PWB
Variable Capacitor
Figure 8-2
REF. NO.
SW1 TAPE 2 DIRECTION A—B
SW2 TAPE 1 PLAY ON—OFF
SW3 TAPE 1 FF/REW ON—OFF
SW4 TAPE 1 REC ON—OFF
SW5 TAPE 2 PLAY ON—OFF
SW6 TAPE 2 FF/REW ON—OFF
SW101 BAND SELECTOR SW2—SW1—MW—FM
SW202 BEAT CANCEL A—B
SW203 DUBBING SPEED/MIC/ HIGH—NORMAL—MIC/
SW401 SURROUND ON— OFF
SW501 FUNCTION SELECTOR/ CD/LINE—RADIO—
SW601 VOLTAGE SELECTOR
DESCRIPTION
FM MODE
POWER TAPE/STAND-BY—ON
POSITION
FM STEREO—FM MONO
110-127 V—220-240 V
– 8 –
Loading...