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Sharp GF-320A Service Manual

G f-320a(bk) g f-320a(r) g f-320a(p) g f-320a(y) g f-320a)b l)
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PHOTO: GF-320A(BK)
SPECIFICATIONS . . . . . . . . .
S T R I N G I N G O F D I A L C O R D . . . .
NAMES OF PARTS . . . . . . . , . . .
DISASSEMBLY . . . . . . . . . . . . . .
BLOCK DIAGRAM . . . . . . . . .
CIRCUIT ADJUSTMENT . . . . . . . .
M E C H A N I C A L A D J U S T M E N T . . . .
EXPLODED VIEW . . . . . . . . .
SCHEMATIC
W I R I N G S I D E O F P.W.BOARD . . . .
NOTES ON SCHEMATIC DIAGRAM
T Y P E S O F T R A N S I S T O R A N D L E D
REPLACEMENT PARTS LIST . . . . .
DIAGRAM
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in the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified be
used.
Page
2
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3
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. . . . . . 6 - 8
. . . . . 8
. . . . . 9, IO
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. II,12
. . . . . 13,14
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15
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. . . . . 1 6 - 1 9

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Summary of Contents for Sharp GF-320A

  • Page 1 PHOTO: GF-320A(BK) in the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used. Page SPECIFICATIONS ....2 S T R I N G I N G O F D I A L C O R D .

  • Page 2: Specifications

    P L E A S E R E F E R T O T H E O P E R A T I O N M A N U A L G E N E R A L RADIO AC 240 V, 50 Hz Frequency range: Power source: FM;...

  • Page 3: Names Of Parts

    2. Headphone Jack 3. Volume Control 4. Balance Control 5. Power Indicator 6. FM Stereo indicator 7. Tuning Control 8. Function Selector Switch 9. Record Button 11. Rewind Button 12. Fast Forward Button 13. Stop/Eject Button 14. Pause Button 15. Graphic Equalizer Control 16.
  • Page 4 Caution on Disassembly 1 . T a k e cassette out of the unit. 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 b e removed when disassembling the unit.
  • Page 5 FUNCTION SELECTOR SWITCH RECORD/PLAYBACK SWITCH Figure 5 BLOCK DIAGRAM...

  • Page 6: Circuit Adjustment

    AM IF/RF ADJUSTMENT T e s t AM POSITION SIGNAL GENERATOR TEST DIAL STEP STAGE REMARKS S E T T I N G MENT Figure 6- 1 AM IF 455 kHz High Adjust for frequency best “IF” 455 kHz 510 kliz Lowest Band frequency...

  • Page 7: Vco Frequency Adjustment

    FM IF/RF ADJUSTMENT 10.7 MHz Oscilloscope FM mono SIGNAL 400 Hz, 30%. FM modulated. GENERATOR TEST STAGE JUST- REMARKS Figure 7-l FM IF 1. Using a minus driver, turn the core of clockwise before taking it out of the frequency bobbin.

  • Page 8: Mechanical Adjustment

    External . Volume control. Maximum SETTING Oscilloscope POSITION Balance control. Center OF SWITCH AND KNOB Test Tape MTT-118 ITEM INPUT MENT REMARKS (CHECK) POINT Head Test tape PLAY BACK ( 1 . 2 V *3 dB) AMPLIFIER M T T - 1 1 8 __ F i g u r e 8- P L A Y B A C K A M P L I F I E R S E N S I T I V I T Y SENSITIVITY...
  • Page 9 57x3...
  • Page 10 GRAPHIC EOALIZER PWB-B / Figure 10 CABINET EXPLODED VIEW...
  • Page 11 RIPPLE FILTER NOTES ON SCHEMATIC DIAGRAM can be found on page 15. Figure 11...

  • Page 12: Schematic Diagram

    GRAPHIC EQUALIZEF 1 SCHEMATIC DIAGRAM...
  • Page 13 Figure 13 WlRiNG Sir...
  • Page 14 GRAPHIC EQUALIZER PW B - B...

  • Page 15: Notes On Schematic Diagram

    The indicated voltage in each section is the one measured Resistor: by Digital Multimeter between such a section and the To differentiate the units of resistors, such symbol K and chassis with no signal given. for ( Marking except mode ohm-type resistor.

  • Page 16: Replacement Parts List

    REPLACEMENT PARTS LIST “HOW TO ORDER REPLACEMENT PARTS” To have your order filled promptly and correctly, please furnish the following information. 1 . M O D E L N U M B E R REF. NO. 3 . P A R T N O . 4 .
  • Page 17 PART NO. DESCRIPTION CODE PART NO. DESCRIPTION CODE 4 7 pF, 1 6 V c731 1 pF, 5 0 V C732 1 pF, 5 0 V c 7 3 3 3 . 3 ,uF. 2 5 V V C K Y M F l HB102K 0.001 PF. 5 0 V c 7 3 4 3 .
  • Page 18 DESCRIPTION CODE PART NO. DESCRIPTION CODE PART NO. 2.2 ohms, 1 J6W Lever, Rewind 2.2 ohms, 1/6W Lever, Pause 150 ohms, 1/4W Spring, Pause Lever Stopper, Pause 3.3 kohms, 1/4W 3.3 kohms, 1/4W Sub-Chassis 47 kohms, 1/6W 47 kohms, 1/6W Spring, Play Button Lever 47 kohms, 1/4W Spring, Actuator...
  • Page 19 PART NO. DESCRIPTION CODE PART NO. DESCRIPTION CODE Bracket, Record Knob, Volume Dial Cord Assembly Knob, Balance Knob, Tuning Knob, Graphic Equalizer Bracket, Mechanism Retaining Damper Front Cabinet, (BK) Front Cabinet, (R) Front Cabinet, (P) Spring, Batten/ (i-,-i Front Cabinet, (Y) Spring, Battery (-) Front Cabinet, (BL) Spring, Cassette Holder Up...
  • Page 20 S H A R P Printed in Japan Writer and Editor: Quality & Reliability Control Center of Audio Systems Group, Sharp Corp.

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