SHARP WF-1100W Service Manual

WF-1100W

SERVICE MANUAL

No. S8953WF1100W/

WF-1100W(BK)
WF-1100W(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

Page

SPECIFICATIONS ...............................................................................................................................................................1

VOLTAGE SELECTION.......................................................................................................................................................2

AC POWER SUPPLY CORD AND AC PLUG ADAPTOR ................................................................................................... 2

FITTING OF DIAL POINTER ...............................................................................................................................................2

NAMES OF PARTS ............................................................................................................................................................. 3

DISASSEMBLY....................................................................................................................................................................4

NOTES ON SCHEMATIC DIAGRAM .................................................................................................................................. 5

TYPES OF TRANSISTOR AND LED...................................................................................................................................5

VOLTAGE ............................................................................................................................................................................5

ADJUSTMENT .....................................................................................................................................................................6

SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD................................................................................................. 8

PARTS GUIDE / EXPLODED VIEW

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: 28 W
Output power: PMPO; 200 W (100 W +100 W)

(AC operation)
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;

600 ohms
CD/LINE; 350 mV/47 kohms

Output terminal: Headphones; 16-50 ohms

(recommended; 32 ohms)

Dimensions: Width; 300 mm (11-13/16")

Height; 240 mm (9-1/2")
Depth; 220 mm (8-11/16")

Weight: 3.8 kg (8.4 lbs.) without bat-

teries

● 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)

55 dB (TAPE 2, playback)

Wow and flutter: 0.15 % (WRMS)
Motor: DC 9 V electric governor
Bias system: AC bias
Erase system: Magnet erase

● Speaker section

Type: 2-way type
Speakers: 12 cm (4-3/4") free-edge speaker × 2

5 cm (2") tweeter × 2

Maximum input power: 24 W
Rated input power: 12.5 W
Impedance: 8 ohms
Dimensions: Width; 235 mm (9-1/4")

Height; 262 mm (10-5/16")
Depth; 220 mm (8-11/16")

Weight: 1.8 kg (4.0 lbs.)/each

Specifications for this model are subject to change without
prior notice.

SHARP CORPORATION

– 1 –

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

WF-1100W

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.

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

FITTING OF DIAL POINTER

1. Remove the Main PWB, the Graphic Equalizer PWB, the
Volume 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, 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 2-2 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

QPLGA0250AFZZ

QPLGA0253AFZZ

Dial Pointer(211)

Front Cabinet

Tuning Knob

C

Dial Pointer Guide
(218)

PWB

Tuner
Gear

B

"0" Point

Fine Tuning
PWB

Screw(601)
ø3x10mm

A

Dial Pointer(211)

Graphic Equalizer
PWB

Volume PWB

– 2 –

Main PWB

Figure 2-1

Make the minimum space.

PWB

Dial Pointer

Stopper

Pointer Gear

Tuner Gear

Main PWB

Front Cabinet

Variable Capacitor

Figure 2-2

12 3

456 7

13
14

15
16

17

28

27

2625

24

23

2221

20

19

18

12

11

10

9

8

29

30 31

32

33
34
35

36
37

38

40

39

NAMES OF PARTS

11.

Extra Bass Control

12.

Graphic Equalizer Controls

13.

Power/(TAPE 2) Play Direction Indicators

14.

Volume Control

15.

Surround Indicator

16.

FM Stereo Indicator

17.

Fine Tuning Control

18.

Built-in Microphone

19.

Mixing Microphone Socket

10.

Headphone Socket

11.

Function Selector Switch

12.

(TAPE 1) Cassette Compartment

13.

Tuning Control

14.

Surround Switch

15.

Band Selector Switch

16.

Dubbing Speed/Built-in Microphone/FM Mode Switch

17.

(TAPE 2) Cassette Compartment

18.

(TAPE 1) Record Button

19.

(TAPE 1) Play Button

20.

(TAPE 1) Rewind Button

21.

(TAPE 1) Fast Forward Button

22.

(TAPE 1) Stop/Eject Button

23.

(TAPE 1) Pause Button

24.

(TAPE 2) Reverse Mode Switch

25.

(TAPE 2) Play Button

26.

(TAPE 2) Fast Wind Buttons

27.

(TAPE 2) Stop/Eject Button

28.

(TAPE 2) Direction Switch

WF-1100W

29.

FM/SW Telescopic Rod Aerial

30.

31.

32.

33.

34.

35.

36.

37.

38.

39.

40.

CD/Line Input Sockets
Beat Cancel Switch
Speaker Terminals
AC Voltage Selector
AC Power Input Socket
Battery Compartment

Tweeter
Bass Reflex Duct
Woofer
Speaker Release Lever
Speaker Wire

– 3 –

WF-1100W

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 PROCEDURE FIGURE

1 Front Cabinet/ 1. Battery Compartment Lid. 4-1

Rear Cabinet ................................. (A1)x1

2. Screw ................... (A2)x3

3. Screw ................... (A3)x4

4. Socket .................. (A4)x1

2 Main PWB/ 1. Knob..................... (B1)x1 4-2

Graphic Equalizer 2. Socket.................. (B2)x3

PWB/ 3. Screw ................... (B3)x5

Volume PWB/ 4. Screw................... (B4)x2

Fine Tuning PWB 5. Mic ....................... (B5)x1

3 Tape mechanism 1. Open the cassette holder. 4-2

2. Screw ................... (C1)x6

4 Power PWB/ 1. Screw................... (D1)x3 4-3

Terminal A PWB/ 2. Screw ................... (D2)x2

Terminal B PWB 3. Bracket................. (D3)x1

4. Screw ................... (D4)x2

5. Hook..................... (D5)x2

Front Cabinet

Main PWB

(B4)x2
ø3x10mm

(C1)x4
ø3x10mm

Rear Cabinet

(D1)x3
ø3x10mm

Fine Tuning PWB

(B3)x5
ø3x10mm

(B2)x3

Volume
PWB

(C1)x2
ø3x10mm

Figure 4-2

Graphic
Equalizer PWB

Washer

(B5)x1

Tape
Mechanism

Power
Transeformer

Voltage Selector

AC Socket

Nat

(B1)x1

Open

Cassette
Holder
(Left/Right)

Power
PWB

(D5)x2

SPEAKER UNIT

STEP REMOVAL PROCEDURE FIGURE

1 Speaker 1. Screw ................... (E1)x5 4-4

2. Front Panel .......... (E2)x1

3. Screw ................... (E3)x2

4. Screw ................... (E4)x4

Main PWB

(A2)x1

ø3x6mm

(A4)x1

Front

Cabinet

(A3)x4

ø3x20mm

(A2)x1

ø3x10mm

(A2)x1

ø3x6mm

(A1)x1

Rear

Cabinet

Figure 4-1

– 4 –

(D2)x2
ø4x16mm

Front Panel
(E2)x1

Tweeter

Woofer

Main Unit

(D3)x1

(D4)x2
ø3x10mm

Terminal B
PWB

Figure 4-3

(E4)x4
ø3x10mm

Figure 4-4

Terminal A
PWB

(E3)x2
ø3x10mm

Speaker
Release
Lever

Speaker Cord
Holder

Speaker Box

Speaker
Cord

Driver

(E1)x5
ø4x16mm

NOTES ON SCHEMATIC DIAGRAM

333ID

VIEW

FRONT

KTA1271 Y
KTC3199 GR
KTC3203 Y

VIEW

FRONT

E B C

• 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.

WF-1100W

REF. NO.

SW1 BAND SELECTOR FM
SW101 RECORD/PLAYBACK PLAYBACK
SW102 BEAT CANCEL A
SW103 DUBBING SPEED/MIC/ MIC/FM MONO

SW401 SURROUND ON
SW501 FUNCTION SELECTOR CD/LINE
SW501A TAPE 2 MAIN OFF
SW502 TAPE 1 MAIN OFF
SW503 TAPE 2 PLAY OFF
SW504 TAPE 2 DIRECTION A
SW601 VOLTAGE SELECTOR AC220-240V

DESCRIPTION POSITION

FM MODE

IC2 (LA1805)

PIN
FM
MW/SW1/SW2

1.6V

1.7V

PIN
FM

1.1V0V2.1V

MW/SW1/SW2

IC101 (TA8189N)

PIN
PLAY
REC

PIN
PLAY
REC

0.9V

0.9V0V0V

Figure 5 TYPES OF TRANSISTOR AND LED

VOLTAGE

123456789101112

1.6V

1.7V

13 14 15 16 17 18 19 20 21 22 23 24

1.9V1V1.8V

123456789101112

0V0V0V0V1.3V

13 14 15 16 17 18 19 20 21 22 23 24

5.8V

6.5V

1.3V

1.3V

1.3V

0.2V

1.4V

1.8V

1.8V

1.3V

1.3V

2.1V

2.1V

1.6V

1.7V0V0V

1.6V

1.7V

1.4V

1.4V

1.4V

1.5V

1.6V

1.6V

1.4V

1.4V0V0V0V0V

5.2V

5.2V

– 5 –

10.7V

10.7V0V0V

0.4V

1.1V

2.1V0V1.4V

5.8V

6.3V

1.4V

2.4V

2.4V

5.8V

6.3V

2.1V

2.1V

1.3V

1.3V

2.4V

2.4V

0.5V

1.7V

1.3V

1.3V0V0V0V0V

1.3V

1.3V0V0V0V0V

5.1V

6.4V

1.6V

1.7V

0.9V

0.9V

1.4V

1.6V

WF-1100W

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 1,2:VR102 3,000 ± 60 Hz Headphones

Adjustment

Point

Specified

Value

Instrument

Connection

Socket
(Loadresistance:

32 ohms)

DECK SECTION

• Bias Oscillation

• Beat Cancel Switch: A

Adjustment Point Specified value Instrument

L301 100 kHz + 4 kHz Pin 1 of CNS102

Specified Value

Beat Cancel A: 100 ± 4 kHz

B: 94 ± 4 kHz
C: 104 ± 4 kHz

• Playback Amplifier Sensitivity Check

Test tape

MTT-118 2.5 V ± 3 dB Speaker terminal

Specified value Instrument Connection

(Load resistance: 8 ohms)

Connection

TUNER SECTION

fL: Low-range frequency
fH: High-renge frequency

• FM IF/RF

Test Stage

FM IF L9 Input: FM Antenna
FM Detection L10 Output:Pin 9 of IC2

FM Band fL: L1 Input: Antenna
Coverage fH: TC1 Output: Headphone Socket
FM Tracking fL(88.0 MHz): L2 (Load resistance:

Specified Value/

Adjusting

Point

fH(108 MHz): TC2 32 ohms)

• AM IF/RF

Test Stage

AM IF L11

MW Band fL: L6
Coverage fH: TC3

MW Tracking fL(600 kHz): L3

SW1 Band fL(2.3 MHz): L7
Coverage fH(7.3 MHz): TC5

SW1 fL(2.6 MHz): L4
Tracking fH(6 MHz): TC6

SW2 Band fL(7.3 MHz): L8
Coverage fH(22 MHz): TC7

SW2 fL(8.5 MHz): L5
Tracking fH(19 MHz): TC8

Specified Value/

Adjusting

Point

fH(1,400 kHz):TC4

• VCO Frequency

Adjustment

Point

VR1 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 IC2 with the test circuit, and
measure the value.

Pin 13 of IC2

10 pF

1M ohm

Pin 21 of IC2

D

G

S

FET: 2SK212
(or Other 2SK Type FET.)

0.1 µF

10K ohm

Instrument

Connection

Instrument

Connection

Input: Antenna
Output: Pin 9 of IC2

Input: Antenna

Output: Headphone Socket

(Load resistance
32 ohms)

of IC2

TO FREQUENCY
COUNTER

– 6 –

Figure 6 VCO FREQUENCY TEST CIRCUIT