XL-1100 (serv.man5). Part 1 - Text (1-18) - Sharp Audio Service Manual (repair manual). Page 11

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AM

GND

FM

75

OHMS

ANTENNA
TERMINAL

SO301

T302

FE301

T306

IC303

T351

VR351

TP301

FM Mute
Level

AM Band
Coverage fL

AM
Tracking fL

AM IF

IC302

20

TUNER PWB-A2

• Setting the Test Mode
Keeping the FF/FWD button and MEMORY/SET button
pressed, turn on ON/STAND-BY. Then, the frequency is
initially set in the memory as shown in Table. Call it with the
VOLUME UP/DOWN button to use it for adjustment and check
of tuner circuit.

1

87.50 MHz

6

522 kHz

2

108.00 MHz

7

1,620 kHz

3

98.00 MHz

8

990 kHz

4

90.00 MHz

9

603 kHz

5

106.00 MHz

10

1,404 kHz

• FM Mute Level
Signal generator: 1 kHz, 40 kHz dev., FM modulated

*1. Adjust so that an output signal appears.

87.5 MHz

87.5 MHz

2.2 V 

±

 0.7 V

TP301

108 MHz

108 MHz

7.3 V 

±

 1.0 V

TP301

• Check FM VT
Signal generator: 1 kHz, 40 kHz dev., FM modulated

98.00 MHz

98.00 MHz

VR351*1

Input: SO301

(30 dB

µ

V)

Output: Speaker
Terminal

*1. Input: Antenna,

Output: Speaker Terminal

*2. Input: Input is not connected,

Output: TP301

AM IF

450 kHz

1,620 kHz

T351

*1

 AM Band

—

522 kHz

(fL): T306

*2

Coverage

1.1 

±

 0.1 V

AM

990 kHz

990 kHz

(fL): T302

*1

Tracking

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

Signal generator: 400 Hz, 30%, AM modulated