Sanyo M7770K - Service Manual

MINI STEREO CASSETTE
RECORDER
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SoAN YO
Power Source
Ee ee a as 9 ({UM-2: HP11, ¢ Cell,
Babyzelle, R14) x 6
Output: Power 2 2 oe eee: 3.5W x 2 (Max.)
Power GonsumplOn vee eee es OW
Current Consumption (at Vol. Min.)
Record mode... oe eee. 265mA
Playback mod6 .. oye ee 175mA
Fast Forward mode. 2 vec 155mA
Rewind mode csc. sk e. 165mA
Recording System. se AG Blas
Erasing SYStOM oc lise eh ee ge AC Erasing
ape Sheed 2 ee 1-7/8 10s. £3%
Wow & Flotiere ie eee 0.15% WRMS
Fast: Forward Time: 22 eee. 110sec. (with C-60)
Rewtnd: Pime:oisoee ieee ie 110sec. (with C-60)
Frequency Response (Overall)
PO2 O39 solo ee AQHz ~ 13,000 Hz
CHO2 ee. 40Hz ~ 14,000 Hz
Metab: oe es AOHz ~ 16,000 Hz
Erase Ratio (Overall, with Fe203). .
Crosstalk (with Fe203)
TACK AO VEC este hee aoe :
Hume&:Notse (at Volo Mins) oc oe.
Input Sensitivity and Impedance
MIC,
Ee ec Se
NN eee
Output Level and |mpedance
PEN UE ee a
EXT SDeaker 1) ou en
Headphone eve ee ik ee ;
Frequency Range
MW
a Ser i ae Se a, Se ce ed
ee a a a ch i se ee J
a ee a a, Se ee ce eo
—Specifications subject to change without notice.—
142 340 24 |
. 60dB
Signal to Noise Ratio (with Fe203) ..
48dB
50dB
—60dBs
0.3mV/3.3ki2
100mV/100k22
300 mV/2.2 kad
2~ 3202
32 82
525 ~ 1 ,605kHz
2.3~7.3MHzZ
AS ~ 2ZBMAZ
88 ~ 108MHz
WM-3000

Sanyo M7770K Specifications

General

Type	Cassette Player
Brand	Sanyo
Model	M7770K
Speakers	Built-in
Output Power	2.5W
Power Source	AC
Frequency Range	FM: 88 - 108 MHz

Summary

SANYO M7770 K Specifications

Disassembly Instructions

Cabinet Bottom Assembly Removal

Procedure for removing the bottom cabinet cover.

Radio Chassis Assembly Removal

Steps to detach the main radio chassis from the unit.

Amplifier P.C. Board Assembly Removal

Instructions for removing the amplifier printed circuit board.

Radio Tuner P.C. Board Removal

Steps for detaching the radio tuner printed circuit board.

Mechanism Chassis Removal

Guide to removing the tape mechanism chassis.

Cassette Compartment Lid Removal

How to remove the cassette compartment lid.

Notice on Reassembly

Important considerations for reassembling the unit.

Adjustments

AMSS Solenoid Adjustment

Adjusting the solenoid for the Automatic Music Select System.

Tape Speed Adjustment

Calibrating the tape playback speed accurately.

Head Azimuth Adjustment

Aligning the playback/record head for optimal sound.

Tuner Adjustment

MW Alignment

Alignment procedure for the Medium Wave band.

SW1 Alignment

Alignment procedure for Shortwave band 1.

SW2 Alignment

Alignment procedure for Shortwave band 2.

FM Alignment

Alignment procedure for the Frequency Modulation band.

FM Multiplex Adjustment

Adjusting the FM stereo multiplex signal.

38 kHz (V.C.O.) Adjustment

Adjusting the 38kHz oscillator circuit.

Dial Cord Stringing

IC & Transistor Lead Identification

Wiring Diagram

Schematic Diagram (Tuner)

Schematic Diagram (Amplifier)