WF-1000W
SERVICE MANUAL
No. S0957WF1000WK
WF-1000W(BK)
WF-1000W(S)
• In the interests of user-safety the set should be restored to its original condition and only parts identical to those specified should be used.
CONTENTS |
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SPECIFICATIONS ............................................................................................................................................................... |
2 |
VOLTAGE SELECTION ....................................................................................................................................................... |
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AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ................................................................................................... |
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NAMES OF PARTS ............................................................................................................................................................. |
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FITTING OF DIAL POINTER ............................................................................................................................................... |
4 |
DISASSEMBLY .................................................................................................................................................................... |
5 |
ADJUSTMENT ..................................................................................................................................................................... |
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NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. |
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TYPES OF TRANSISTOR AND LED ................................................................................................................................... |
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SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ................................................................................................. |
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PARTS GUIDE / EXPLODED VIEW |
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SHARP CORPORATION |
This document has been published to be used |
for after sales service only. |
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– 1 – |
The contents are subject to change without notice. |
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WF-1000W
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, |
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50/60 Hz |
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DC 15 V ["D" size |
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(UM/SUM-1, R20 or HP-2) |
Power |
battery × 10] |
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consumption: |
28 W |
Output power: |
PMPO; 200 W (total) |
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(AC operation) |
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MPO; 50 W (25 W + 25 W) |
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(AC operation, 10 % T.H.D.) |
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RMS; 25 W (12.5 W + 12.5 |
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W) |
Input terminal: |
(DC operation, 10 % T.H.D.) |
Mixing microphone; |
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600 ohms |
Output terminal: |
CD/LINE; 350 mV/47 kohms |
Headphones; 16-50 ohms |
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Dimensions: |
(recommended; 32 ohms) |
Width; 300 mm (11-13/16") |
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Height; 240 mm (9-1/2") |
Weight: |
Depth; 220 mm (8-11/16") |
3.8 kg (8.4 lbs.) without bat- |
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teries |
● Radio section
Frequency range: |
FM; 88 - 108 MHz |
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SW1; 2.3 |
- 7.3 MHz |
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SW2; 7.3 |
- 22 MHz |
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MW; 526.5 - 1,606.5 kHz |
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● Tape recorder section
Frequency response: |
60 |
- 12,000 Hz (Normal tape) |
Signal/noise ratio: |
40 |
dB (TAPE 1, recording/playback) |
Wow and flutter: |
55 |
dB (TAPE 2, playback) |
0.15 % (WRMS) |
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Motor: |
DC 9 V electric governor |
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Bias system: |
AC bias |
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Erase system: |
Magnet erase |
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● Speaker section
Type: |
2-way type |
Speakers: |
12 cm (4-3/4") free-edge speaker × 2 |
Impedance: |
Tweeter × 2 |
8 ohms |
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Dimensions: |
Width; 235 mm (9-1/4") |
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Height; 262 mm (10-5/16") |
Weight: |
Depth; 220 mm (8-11/16") |
1.8 kg (4.0 lbs.)/each |
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 AC power supply socket to the visible indication of the side of your local voltage.
AC POWER SUPPLY CORD AND AC PLUG ADAPTOR
QACCE0007AW00
QACCA0001SJ00
QPLGA0253AFZZ
– 2 –
WF-1000W
NAMES OF PARTS
1.Graphic Equalizer Controls
2.Power Indicator
3.Volume Control
4.FM Stereo Indicator
5.Fine Tuning Control
6.Built-in Microphone
7.Mixing Microphone Socket
8.Headphone Socket
9.Function Selector Switch
10.(TAPE 1) Cassette Compartment
11.Tuning Control
12.Extra Bass Switch
13.Band Selector Switch
14.Dubbing Speed/Built-in Microphone/FM Mode Switch
15.(TAPE 2) Cassette Compartment
16.(TAPE 1) Record Button
17.(TAPE 1) Play Button
18.(TAPE 1) Rewind Button
19.(TAPE 1) Fast Forward Button
20.(TAPE 1) Stop/Eject Button
21.(TAPE 1) Pause Button
22.(TAPE 2) Play Button
23.(TAPE 2) Rewind Button
24.(TAPE 2) Fast Forward Button
25.(TAPE 2) Stop/Eject Button
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2 |
3 |
4 |
5 |
6 |
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11 |
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12 |
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7 |
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13 |
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8 |
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14 |
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9 |
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10 |
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15 |
16 17 18 19 20 21 |
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22 23 24 25
26.FM/SW Telescopic Rod Aerial
27.CD/Line Input Sockets
28.Beat Cancel Switch
29.Speaker Terminals
30.AC Voltage Selector
31.AC Power Input Socket
32.Battery Compartment
33.Tweeter
34.Bass Reflex Duct
35.Woofer
36.Speaker Release Lever
37.Speaker Wire
26 27 28
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31
32
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36 |
34 35 
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– 3 –
WF-1000W
FITTING OF DIAL POINTER
1.Remove the Main PWB, the Graphic Equalizer PWB, the Volume PWB and the Fine Tuning PWB. (See Figure 5-2 in the "Disassembly" on page 5.)
2.Remove the dial pointer guide and PWB.
3.Insert the dial pointer from A , lead it under B , hang it on the tuner gear and then pass it through C .
4.Replace the Main PWB, the Graphic Equalizer PWB, the Volume 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 4-2 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.
"0" Point |
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Dial Pointer(211) |
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Front Cabinet |
A |
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Tuning Knob |
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B |
Dial Pointer(211) |
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Graphic Equalizer |
Fine Tuning |
PWB |
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PWB |
C |
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Screw(601) |
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ø3x10mm |
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PWB |
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Tuner |
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Gear |
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Dial Pointer Guide |
Volume PWB |
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(218) |
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Main PWB
Figure 4-1
Make the minimum space.
PWB
Dial Pointer
Stopper
Pointer Gear
Tuner Gear
Main PWB
Front Cabinet
Variable Capacitor
Figure 4-2
– 4 –
WF-1000W
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.
MAIN UNIT
STEP |
REMOVAL |
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PROCEDURE |
FIGURE |
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1 |
Front Cabinet/ |
1. |
Battery Compartment Lid. |
5-1 |
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Rear Cabinet |
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(A1)x1 |
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................................. |
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2. |
Screw ................... |
(A2)x3 |
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3. |
Screw ................... |
(A3)x4 |
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4. |
Socket .................. |
(A4)x1 |
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2 |
Main PWB/ |
1. |
Knob ..................... |
(B1)x1 |
5-2 |
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Graphic Equalizer |
2. |
Socket .................. |
(B2)x3 |
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PWB/ |
3. |
Screw ................... |
(B3)x5 |
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Volume PWB/ |
4. Screw ................... |
(B4)x2 |
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Fine Tuning PWB |
5. |
Mic ....................... |
(B5)x1 |
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3 |
Tape mechanism |
1. |
Open the cassette holder. |
5-2 |
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2. |
Screw ................... |
(C1)x6 |
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4 |
Power PWB/ |
1. Screw ................... |
(D1)x3 |
5-3 |
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Terminal A PWB/ |
2. |
Screw ................... |
(D2)x2 |
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Terminal B PWB |
3. |
Bracket ................. |
(D3)x1 |
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4. |
Screw ................... |
(D4)x2 |
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5. |
Hook ..................... |
(D5)x2 |
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SPEAKER UNIT
STEP |
REMOVAL |
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PROCEDURE |
FIGURE |
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1 |
Speaker |
1. Screw ................... |
(E1)x5 |
5-4 |
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2. |
Front Panel .......... |
(E2)x1 |
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3. |
Screw ................... |
(E3)x4 |
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Main PWB
(A2)x1
ø3x6mm
(A4)x1
Front 
Cabinet
(A3)x4
ø3x20mm
(A2)x1
ø3x10mm
(A2)x1
Rear ø3x6mm
Cabinet (A1)x1
Figure 5-1
– 5 –
Fine Tuning PWB Volume |
Graphic |
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PWB |
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Equalizer PWB |
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Front Cabinet |
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(B1)x1 |
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Nat |
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Washer |
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Main PWB |
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Open |
(B4)x2 |
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(B5)x1 |
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ø3x10mm |
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(C1)x4 |
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ø3x10mm |
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(B3)x5 |
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Cassette |
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Holder |
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ø3x10mm |
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(C1)x2 |
Tape (Left/Right) |
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(B2)x3 |
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ø3x10mm |
Mechanism |
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Figure 5-2
Power
Rear Cabinet
Transformer
Voltage Selector
AC Socket
Power
PWB
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(D5)x2 |
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(D1)x3 |
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ø3x10mm |
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(D2)x2 |
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ø4x16mm |
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(D3)x1 |
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(D4)x2 |
Terminal B |
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ø3x10mm |
PWB |
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Terminal A |
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PWB |
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Front Panel |
Figure 5-3 |
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(E2)x1 |
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Tweeter |
Speaker Cord |
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Woofer |
Speaker |
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Holder |
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Cord |
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Driver |
(E3)x4
ø3x10mm
Main Unit
Speaker |
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Release |
(E1)x5 |
Lever Speaker Box |
ø4x16mm |
Figure 5-4
WF-1000W
ADJUSTMENT
MECHANISM SECTION
• Driving Force Check
Torque Meter |
Specified Value |
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Play: TW-2412 |
Tape 1: Over 60 g |
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Tape 2: Over 60 g |
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• Torque Check
Torque Meter |
Specified Value |
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Tape 1 |
Tape 2 |
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Play: TW-2111 |
30 to 70 g.cm |
30 to 70 g.cm |
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Fast Forward: TW-2231 |
Over 55 g.cm |
Over 55 g.cm |
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Rewind: TW-2231 |
Over 55 g.cm |
Over 55 g.cm |
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• Head Azimuth
Test Tape |
Instrument Connection |
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MTT-114 |
Headphones Socket |
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(Load resistance: 32 ohms) |
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• Tape Speed (Normal only)
Test Tape |
Adjustment |
Specified |
Instrument |
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Point |
Value |
Connection |
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MTT-111 |
Tape 1,2:VR102 |
3,000 ± 60 Hz |
Headphones |
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Socket |
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(Loadresistance: |
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32 ohms) |
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DECK SECTION
•Bias Oscillation
•Beat Cancel Switch: C
Adjustment Point |
Specified value |
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Instrument |
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Connection |
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L301 |
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100 kHz + 4 kHz |
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Pin 1 of CNS102 |
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Specified Value |
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Beat Cancel |
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A: 104 ± 4 kHz |
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B: 94 ± 4 kHz |
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C: 100 ± 4 kHz |
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• Playback Amplifier Sensitivity Check |
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Test tape |
Specified value |
Instrument Connection |
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MTT-118 |
2.5 V ± 3 dB |
Speaker terminal |
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(Load resistance: 8 ohms) |
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TUNER SECTION
fL: Low-range frequency fH: High-renge frequency
• FM IF/RF
Test Stage |
Specified Value/ |
Instrument |
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Adjusting |
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Connection |
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Point |
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FM IF |
L9 |
Input: FM Antenna |
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FM Detection |
L10 |
Output:Pin 9 of IC2 |
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FM Band |
fL: L1 |
Input: Antenna |
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Coverage |
fH: TC1 |
Output: Headphone Socket |
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FM Tracking |
fL(88.0 MHz): L2 |
(Load resistance: |
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fH(108 MHz): TC2 |
32 ohms) |
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• AM IF/RF
Test Stage |
Specified Value/ |
Instrument |
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Adjusting |
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Connection |
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Point |
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AM IF |
L11 |
Input: Antenna |
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Output: Pin 9 of IC2 |
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MW Band |
fL: L6 |
Input: Antenna |
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Coverage |
fH: TC3 |
Output: Headphone Socket |
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(Load resistance |
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MW Tracking |
fL(600 kHz): L3 |
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fH(1,400 kHz):TC4 |
32 ohms) |
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SW1 Band |
fL(2.3 MHz): L7 |
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Coverage |
fH(7.3 MHz): TC5 |
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SW1 |
fL(2.6 MHz): L4 |
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Tracking |
fH(6 MHz): TC6 |
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SW2 Band |
fL(7.3 MHz): L8 |
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Coverage |
fH(22 MHz): TC7 |
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SW2 |
fL(8.5 MHz): L5 |
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Tracking |
fH(19 MHz): TC8 |
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• VCO Frequency
Adjustment |
Specified value |
Instrument Connection |
Point |
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VR1 |
76 kHz ± 200 Hz |
Pin 13, Pin 21 and ground |
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of IC2 |
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Note:
After preparing the test circuit shown in Fig. 6, connect the Pin 13, Pin 21 and ground of the IC2 with the test circuit, and measure the value.
Pin 13 of IC2 |
Pin 21 of IC2 |
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D |
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G |
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FET: 2SK212 |
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10 pF |
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(or Other 2SK Type FET.) |
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S |
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1M ohm |
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0.1 F |
TO FREQUENCY |
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10K ohm |
COUNTER |
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Figure 6 VCO FREQUENCY TEST CIRCUIT
– 6 –
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