Sharp gf 777z

Page 1

SHARP SERVICE MANUAL

SX3E56 F~777Zl

GF-T 77Z

Cauxion!

Under the employment of Iaiest technologies this
set uses leadless parts. Consult page 19, 20 withou!
fail before replacing xhem.

In the interests of user»safety the set should be
resumed to its original condition and only parts
identicaifito those specified be used

FEATURES

Multi-Amp 3-Way 6-Speaker System Massive 90W PMPO
Dynamic Super Woofer Sound

16cm (6%") Woofer with Rigid Speaker Ring

Horn Tweeter for Clear, Crisp Highs

Two Decks Side by Side, for Versatile Record/Playback
Soft-Touch Cassette Controls

Brilliant Metal Tape Sound

APLD (Auto Program Locate Device)

Sharp Super Noise Reduction System

INDEX TO CONTENTS

SPECIFICATIONS ......................................
AC SUPPLY VOLTAGE SELECTOR .
NAMES OF PARTS .................
DISASSEMBLY ....................
BLOCK DIAGRAM .............
MECHANICAL ADJUSTMENT
ELECTRICAL ADJUSTMENT .....
INFORMATION OF LEADLESS TYPE RESISTORS, CAPACITORS

AND JUMPERS ................................................. 19,20

SCHEMATIC DIAGRAM .......................... .., 21, 22, 25, 26
WIRING SIDE OF PRINTED WIRING BOARD ......... . . 23, 24, 27 ~ 31
NOTES ON SCHEMATIC DIAGRAM ............................. 32
CABINET EXPLODED VIEW ........ 33 N 35
MECHANISM EXPLODED TOP VIEW .................................... 36
MECHANISM EXPLODED BUTTOM VIEW ............................... 37
DIAL CORD STRINGING .............................. 38
EQUIVALENT CIRCUIT OF INTEGRATED CIRCUIT .,. ......... 39, 40
REPLACEMENT PARTS LIST ...................................... 41~ 50

SHARP CORPORATIONOSAKA, JAPAIll

GF-777Z

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

SPECIFICATIONS

GENERAL
Power source: AC l10-120/210A220/230-240V,
50/60Hz

DC 15V lUM/SUIVI-l, R720,
HP-Z, or battery x 10, "D" or
external DC supply)

16cm (6-1/2) x 2

16cm (64/2) x 2

Horn type x 2

PMPO 90W, AC Supply Opera-
tion with 4 Amplifiers

l7-lC's

50

1-SCR

1-FET

BODiodes

11-LEDS

752mm

166mm

379mm

11r8kg

Super Woofer;
Woofer;
Tweeter;
Output power:

Speakers:

Semiconductors:

Width;
Depth;
Height;
Weight (without batteries):

Dimensions:

TAPE RECORDER/PLAYER

Tape: Philipstype compact cassette tape
Frequency response: 30Hz to 18,000Hz (Metal tape)
30Hz to 17,000H2 (Croz tape)
30Hz to 14,000Hz (Normal tape)
SGdB (Metal tape, NR switch: ON)
60dB (SNRS: 0N)

56dB (SNRS: OFF)

Wow and flutter: 0.055% (WRMS)

Input sensitivity and input impedance:

S/N ratio: Tape 2

Tape 1

Ext. Mic; 600 ohms
Mixing mic; 600 ohms
_ Line in; 0.2V/22K ohms
Output level and loaded impedance:
' Headphones; 8 ohms to 25 ohms

External speaker; 4 ohms to 8 ohms
Line out," 0.5V/50K ohms

RADIO
Frequency range: AM; 526,5kHz to 1,606,5kHz
SW); 2.3MHz to 7.3MHz
SW2; 7.3MH2 to 22MHz

FM; 87.6MHZ to 308MHz

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

POWER SUPPLY

The GF-777Z Unit will operate on an AC mains supply of 110
N 120 Volts, 210 ~ 220 Volts, or 230 ~ 240 Volts of

50H: or GOHZ. For portable use i! will operate on its internal
batteries, or from an external 15 Volts DC supply (with an
adaptor).

AC SUPPLY VOLTAGE SELECTOR

The Voltage Selector setting should be checked to see that it
conforms to the local AC supply voltage. This must be done
before plugging in to the AC supplyr Adjustment is made by
turning the adjusting screw in either direction with a minus
headed screwdriver until reading of Selector matches the local
AC supply voltage,

Caution:
Use this unit only on the specified voltages, otherwise
damage, fire, or accidents may be caused SHARP cannot
accept responsibility for any damage resulting from the use
of this unit on unspecified voltages,