WF-930Z
SERVICE MANUAL
No. S5630WF930Z//
WF-930Z(BK)
• 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 |
|
|
Page |
SPECIFICATIONS ............................................................................................................................................................... |
2 |
VOLTAGE SELECTION ....................................................................................................................................................... |
2 |
AC POWER SUPPLY CORD AND PLUG ............................................................................................................................ |
2 |
NAMES OF PARTS .............................................................................................................................................................. |
3 |
FITTING OF DIAL POINTER ............................................................................................................................................... |
3 |
DISASSEMBLY .................................................................................................................................................................... |
4 |
REMOVING AND REINSTALLING THE MAIN PARTS ....................................................................................................... |
5 |
ADJUSTMENT ..................................................................................................................................................................... |
6 |
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ................................................................................................. |
8 |
NOTES ON SCHEMATIC DIAGRAM ................................................................................................................................. |
12 |
TYPES OF TRANSISTOR AND LED ................................................................................................................................. |
12 |
REPLACEMENT PARTS LIST / EXPLODED VIEW |
|
SHARP CORPORATION
WF-930Z
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.
SPECIFICATIONS
I General
Power source: AC 110 - 127/220 - 240 V, 50/60 Hz DC 12 V ["D" size (UM/SUM - 1, R20 or HP - 2) battery x 8]
Power consumption: 30 W
Output power: PMPO; 60 W (30 W + 30 W) (AC operation)
MPO (Max.); 20 W (10 W + 10 W) (AC operation)
RMS; 10 W (5 W + 5 W) (DC operation, 10 % T.H.D.)
Input terminal: Mixing microphone; 600 ohms Output terminal: Headphones; 16 -50 ohms
(recommended; 32 ohms) Dimensions: Width; 300 mm (11 - 13/16")
Height; 217 mm (8 - 9/16") Depth; 186 mm (7 - 3/8")
Weight: 2.9 kg (6.4 Ibs.) without batteries
I 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
I Tape recorder section
Frequency response: 60 - 12,000 Hz (Normal tape)
Signal/noise ratio: |
40 dB (TAPE 1, recording/playback) |
|
55 dB (TAPE 2, playback) |
Wow and flutter: |
0.15 % (WRMS) |
Motor: |
DC 12 V electric governor |
Bias system: |
AC bias |
Erase system: |
Magnet erase |
I Speaker section
Type: |
2 - way type |
Speakers: |
12 cm (4 - 3/4") free - edge |
|
woofer x 2 |
|
Tweeter x 2 |
Maximum input |
|
power: |
10 W |
Impedance: |
3 ohms |
Dimensions: |
Width; 195 mm (7 - 11/16") |
|
Height; 217 mm (8 - 9/16") |
|
Depth; 189 mm (7 - 1/2") |
Weight: |
1.2 kg (2.6 Ibs.)/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 PLUG
9FGS9822020300 |
QPLGA0250AFZZ |
|
|
9FGS9821620000 |
QPLGA0253AFZZ |
9FGS9822020500 |
|
9FGS9822020400 |
|
|
– 2 – |
WF-930Z
NAMES OF PARTS
1.Extra Bass Control: X-BASS
2.Graphic Equalizer Controls
3.FM Stereo Indicator
4.Power Indicator
5.Function Selector Switch
6.Volume Control
7.Dubbing Speed/Built-in Microphone Switch
8.Built-in Microphone
9.Tuning Control
10.Fine Tuning Control
11.Band Selector Switch
12.Headphones Socket
13.Mixing Microphone Socket
14.FM Mode Switch
15.(TAPE 1) Cassette Compartment
16.(TAPE 1) Record Button: I
17.(TAPE 1) Play Button: 0
18.(TAPE 1) Rewind Button: 3
19.(TAPE 1) Fast Forward Button: 2
20.(TAPE 1) Stop/Eject Button: ■ 7
21.(TAPE 1) Pause Button: 6
22.(TAPE 2) Play Button: 0
23.(TAPE 2) Rewind Button: 3
24.(TAPE 2) Fast Forward Button: 2
25.(TAPE 2) Stop/Eject Button: ■ 7
26.(TAPE 2) Cassette Compartment
27.CD/Line Input Sockets
28.Beat Cancel Switch
29.FM/SW Telescopic Rod Aerial
30.Speaker Terminals
31.AC Voltage Selector
32.AC Power Input Socket
33.Battery Compartment
34.Tweeter
35.Woofer
36.Speaker Release Lever
37.Speaker Wire
2 |
3 4 |
5 |
6 |
7 |
8 |
9 |
1 |
|
|
|
|
|
10 |
|
|
|
|
|
|
|
12 |
|
|
|
|
|
11 |
13 |
|
|
|
|
|
|
14 |
|
|
|
|
|
26 |
15 |
|
|
|
|
|
|
|
|
|
|
|
|
|
16 1718 19 2021 22 23 24 25 |
||||||
TAPE 1 |
|
|
|
TAPE 2 |
||
27 28 29 30
31
32
33
34 |
36 |
35
37
FITTING OF DIAL POINTER
1.Remove the main PWB. Attach the dial pointer as shown arrow Âonthefrontcabinet,puttingitintothesectionindicatedbyarrow È. Insert it between the arrows Ê.
2.Install the main PWB in the front cabinet and secure it with the two screws.
3.Turn the dial drum in the direction indicated by arrow Ë. Set the dialpointertopoint"0",andthenmaketherestoftheadjustments.
Front
Cabinet C
Tape
Mechanism
Dial Pointer (203)
''0''Point
Dial Pointer (203)
|
A |
B |
Dial Drum (213) |
D |
Screw(606) |
|
ø3 x8mm |
|
Main PWB |
Screw(601) |
|
ø2 x4mm |
|
Figure 3 |
|
– 3 –
WF-930Z
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 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 |
|
PROCEDURE |
FIGURE |
|
|
|
|
|
||
1 |
Front Cabinet/ |
1. Battery Compartment |
|
||
|
Rear Cabinet |
|
Lid ................... |
(A1)x1 |
4-1 |
|
|
2. |
Screw ................ |
(A2)x4 |
|
|
|
3. |
Screw ................ |
(A3)x1 |
|
|
|
4. |
Screw ................ |
(A4)x1 |
|
|
|
5. |
Screw ................ |
(A5)x3 |
|
|
|
6. |
Socket ............... |
(A6)x1 |
|
|
|
7. |
Tip ..................... |
(A7)x1 |
|
|
|
|
|
|
|
2 |
Main PWB/ |
1. Knob ................. |
(B1)x1 |
4-2 |
|
|
Volume PWB |
2. Socket ............... |
(B2)x5 |
|
|
|
|
3. |
Screw ................ |
(B3)x1 |
|
|
|
4. |
Screw ................ |
(B4)x1 |
|
|
|
|
|
|
|
3 |
Graphic Equalizer |
1. Screw ................ |
(C1)x4 |
4-2 |
|
|
PWB |
|
|
|
|
|
|
|
|
|
|
4 |
LED PWB |
1. Screw ................ |
(D1)x2 |
4-2 |
|
|
|
|
|
||
5 |
Tape Mechanism |
1. Open the cassette holder |
4-2 |
||
|
|
2. |
Screw ................ |
(E1)x5 |
|
|
|
|
|
|
|
6 |
Power PWB |
1. Screw ................ |
(F1)x1 |
4-3 |
|
|
|
2. |
Bracket .............. |
(F2)x1 |
|
|
|
|
|
|
|
SPEAKER
STEP |
REMOVAL |
PROCEDURE |
FIGURE |
|
|
|
|
|
|
1 |
Front Panel |
1. Screw ................ |
(G1)x4 |
4-4 |
|
|
|
|
|
2 |
Woofer |
1. Screw ................ |
(G2)x4 |
4-4 |
|
|
|
|
|
(A2) x2 |
Main |
|
PWB |
||
ø3 x10mm |
||
(A7) x1 |
||
|
|
|
|
|
Front |
(A3) x1 |
|
|
|
Cabinet |
ø3 x14mm |
|
|
|
|
|
|
|
|
(A2) x2 |
|
|
|
|
ø3 x10mm |
|
(A5) x3 |
|
|
Main |
|
ø3 x8mm |
|
||
(A1) x1 |
(A4) x1 |
|
|
PWB |
|
Rear |
|
|
|
|
ø3 x28mm |
(A6) x1 |
Front |
|
|
|
Cabinet |
||
|
|
Cabinet |
||
|
|
|
||
|
|
|
|
|
|
Figure 4-1 |
|
|
|
Front Cabinet |
Nat |
|
||
|
Main |
|
||
|
Washer |
|
||
|
PWB |
|
||
|
Volume |
|
(B1) x1 |
|
(B4) x1 |
|
PWB |
|
|
|
(D1)x2 |
|
||
ø2 x4mm |
|
|
|
|
|
|
|
ø3x8mm |
|
(B3) x1 |
|
|
LED PWB |
|
|
|
Graphic |
||
ø3 x8mm |
|
|
Equalizer |
|
|
|
|
PWB |
|
|
|
|
Open |
|
|
|
|
|
Cassette |
(E1) x5 |
|
|
|
Holder |
|
|
|
(Left/Right) |
|
ø3x 8mm |
|
|
|
|
|
|
|
|
|
|
|
|
(C1) x4 |
|
|
|
|
ø3x8mm |
|
|
(B2) x5 |
|
Tape |
|
|
|
Mechanism |
|
|
|
|
|
|
|
|
Figure 4-2 |
|
|
|
Speaker Cord |
Speaker |
Power |
|
|
Holder |
Rear Cabinet |
|||
Front Panel |
Cord |
Transeformer |
||
Power PWB |
||||
|
Driver |
|
||
Tweeter |
UNIT |
|
|
|
|
|
|
||
Woofer |
|
|
|
|
(G2) x4 |
|
(F1) x1 |
|
|
ø3x 8mm |
|
ø3 x8mm |
|
(F2) x1
Speaker Box
Figure 4-4
(G1) x4 |
|
ø3 x14mm |
Figure 4-3 |
– 4 –
WF-930Z
REMOVING AND REINSTALLING THE MAIN PARTS
TAPE MECHANISM SECTION
Perform steps 1, 2 and 5 of the disassembly method to remove the tape mechanism. (See page 4.)
How to remove the record / playback, playback and erase heads (See Fig. 5-1 and 5-2.)
1.Remove the screws (A1) x 2 pcs., to remove the record/ playback head.
2.Remove the hooks (A2) x 2 pcs., toward the center position as shown in Fig. 5-1. and then extract the erase head upward.
3.Remove the screws (B1) x 2 pcs., to remove the playback
head.
Note:
After replacing the heads and performing the azimuth adjustment, be sure to apply screwlock.
How to remove the pinch roller (See Fig. 5-3.)
1.Carefully bend the pinch roller pawl in the direction of the arrow Â, and remove the pinch roller (C1) upwards.
How to remove the motor (See Fig. 5-4.)
1.Remove the belt.
2.Remove the screws (D1) x 6 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.
How to remove the belts (See Fig. 5-5.)
1.Remove the main belt (E1) x 1 pc., at the tape 1 side from the motor pulley.
2.Remove the main belt (E2) x 1 pc., at the tape 2 side from the motor pulley.
3.Remove the REW/FF belt (E3) x 2 pcs., from the REW/FF roller.
4.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.
|
Moter |
|
|
|
TAPE 2 |
TAPE 1 |
|
TAPE 2 |
Main Bert |
||
Main Bert |
REW / FF
Clutch Ass'y
TAPE 1
Moter
|
Main |
|
|
Belt |
REW / FF |
|
(E1) x1 |
|
REW / FF |
|
Clutch Ass'y |
|
|
|
Frywheel Belt |
Main |
|
(E3) x1 |
Belt |
|
|
(E2) x1 |
|
|
|
REW / FF |
|
Frywheel |
Belt |
|
|
(E3) x1 |
|
Figure 5-5 |
|
(A1) x1 |
TAPE 1 |
ø2x7mm |
|
|
(A1) x1 |
Hook |
ø2x3mm |
(A2) x2 |
Record/Playback |
|
|
|
Head |
Erase
Head
|
Figure 5-1 |
|
(B1) x1 |
|
TAPE 2 |
ø2x7mm |
(B1) x1 |
|
|
ø2x3mm |
Playback |
|
|
|
|
|
Head |
Figure 5-2
Pinch Roller (C1)
Pinch Roller
Pawl
A
Figure 5-3
(D1) x2
ø2 x4mm 
(D1) x2 ø2 x4mm
|
(D2) x3 |
|
Special Screw |
|
Motor |
(D1) x2 |
Bracket |
ø2 x4mm |
|
Motor |
Motor |
|
Bracket |
Figure 5-4
– 5 –
WF-930Z
ADJUSTMENT
MECHANISM SECTION
• Driving Force Check
Torque Meter |
Specified Value |
|
|
Play: TW-2412 |
Tape 1: Over 50g |
|
Tape 2: Over 60 g |
|
|
• Torque Check
Torque Meter |
Specified Value |
|
|
|
|
|
Tape 1 |
Tape 2 |
Play: TW-2111 |
30 to 60 g.cm |
30 to 60 g.cm |
|
|
|
Fast forward: TW-2231 |
55 to 120 g.cm |
80 to 135 g.cm |
|
|
|
Rewind: TW-2231 |
55 to 120 g.cm |
80 to 135 g.cm |
|
|
|
• Head Azimuth
Test Tape |
Instrument Connection |
|
|
MTT-114 |
Headphones Socket |
|
(Load resistance: 32 ohms) |
• Tape Speed (Normal only)
Test Tape |
Adjusting |
Specified |
Instrument |
|
Point |
Value |
Connection |
MTT-111 |
Tape 1,2: VR501 |
3,000 ± 60 Hz |
Headphones |
|
|
|
socket(Load |
|
|
|
resistance: |
|
|
|
32 ohms) |
|
|
|
|
TUNER SECTION
fL: Low-range frequency fH: High-range frequency
• AM IF/RF
|
Specified |
Instrument |
|
Test Stage |
Value/Adjusting |
||
Connection |
|||
|
Point |
||
|
|
||
|
|
|
|
IF |
T3 |
Input: Antenna |
|
|
|
Output: Pin 3 of IC2 |
|
|
|
|
|
MW Band |
fL: L6 |
|
|
Coverage |
fH: TC8 |
|
|
|
|
|
|
MW Tracking |
fL (600 kHz): |
|
|
|
L3 (MW) |
|
|
|
fH (1,400 kHz): |
|
|
|
TC7 |
|
|
|
|
|
|
SW1 Band |
fL: L7 |
|
|
Coverage |
fH: TC4 |
|
|
|
|
|
|
SW1 Tracking |
fL (2.6 MHz): |
|
|
|
L4 (SW1) |
|
|
|
fH (6.0 MHz): |
|
|
|
TC2 |
|
|
|
|
|
|
SW2 Band |
fL: L8 |
|
|
Coverage |
fH: TC3 |
|
|
|
|
|
|
SW2 Tracking |
fL (8.5 MHz): L5 |
|
|
|
fH (19 MHz): TC1 |
|
|
|
|
|
TAPE SECTION
Position of each switch or control
Volume control |
Max |
|
|
Beat cancel |
A |
|
|
Function/Power |
Tape/Stand-by |
|
|
Dubbing speed/Built-in Microphone |
OFF/Mic ON |
|
|
• Bias Oscillation Frequency
|
Specified Value |
|
|
Beat cancel |
A: 100 ± 4 kHz |
|
B: 94 ± 4 kHz |
|
C: 104 ± 4 kHz |
|
|
• Playback Amplifier Sensitivity Check
Test Tape |
Specified Value |
Instrument Connection |
|
|
|
MTT-118 |
1.3 V ± 3 dB |
Speaker terminal |
|
|
(Load resistance: 3 ohms) |
|
|
|
• FM IF/RF
|
Specified |
Instrument |
|
Test Stage |
Value/Adjusting |
||
Connection |
|||
|
Point |
||
|
|
||
|
|
|
|
IF |
T1 |
Input: Antenna |
|
|
|
Output: Pin 1 of IC1 |
|
Detection |
T2 |
||
|
|||
|
|
|
|
Band Coverage |
fL: L2 |
|
|
|
fH: TC6 |
|
|
|
|
|
|
Tracking |
fL (88.0 MHz): |
|
|
|
L1 |
|
|
|
fH (108.0 MHz): |
|
|
|
TC5 |
|
|
|
|
|
• VCO Frequency
Test Stage |
Specified Value |
Instrument |
|
Connection |
|||
|
|
||
|
|
|
|
VR1 |
76 kHz ± 200 Hz |
Pin 13 of IC2 |
|
|
|
|
– 6 –
Loading...