Sharp WF-2100BK, Service Manual

WF-2100W

– 8 –

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.

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/

FM MODE

FM STEREO—FM MONO

SW401

SURROUND

ON—OFF

SW501

FUNCTION SELECTOR/

CD/LINE—RADIO—

POWER

TAPE/STAND-BY—ON

SW601

VOLTAGE SELECTOR

110-127 V—220-240 V

REF. NO.

DESCRIPTION

POSITION

FITTING OF DIAL POINTER

A

B

C

Figure 8-1

1. Remove the Main PWB, the Graphic Equalizer PWB and

the Fine Tuning PWB. (See Figure 4-2 in the "Disassem-
bly" 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.

Figure 8-2

Tuning Knob

Front Cabinet

C

A

Dial Pointer(207)

Tuner
Gear

PWB

Dial Pointer Guide
(256)

Main PWB

Graphic Equalizer
PWB

Fine Tuning
PWB

Screw(605)
ø3x8mm

B

Dial Pointer(207)

"0" Point

Tuner Gear

Stopper

Main PWB

Variable Capacitor

Dial Pointer

PWB

Make the minimum space.

Front Cabinet

Pointer Gear