Sansui G M77 Service Manual

Page 1

SERVICE MANUAL

STEREO GRAPHIC EQUALIZER

SAHSIII li-M77

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CAUTION

1. Parts identified by the LB symbol on the schematic
diagram and Parts List are critical for safety.
Use only replacement parts that have critical
characteristics recommended by the manufacturer.

2. Make leakage-current or resistance measurements
to determine that exposed parts are acceptably in-
sulated from the supply circuit before returning the
appliance to the customer.

Salas-la:
SANSUI ELECTRIC CO., LTD.

G-M77

'SPECIFICATIONS

Input sensitivity and impedance (1 kHz)
INPUT, TAPE PLAY-1,2
.................................. 150 rnV/47 kilohms
(Max. input capability; 5V, 20 Hz to 20 kHz)
Output level (1 kHz)
TAPE REC-1,2 ............. 150 mV/47 kilohms
OUTPUT .................... 150 mV/47 kilohms
(Max. output level; 5V/47 kilohms at 0.5% total
harmonic distortion)
Total harmonic distortion (2V, 20 Hz to 20 kHz)
INPUT, TAPE PLAY»1,2
.................................. 0.01%
Frequency response
(Graphic equalizer controls: 0 position)
INPUT, TAPE PLAY-1,2
.................................. 20 Hz to 20 kHz,
+0 dB, -2 dB
Signal to noise ratio (Short-circuit, A-network)
INPUT, TAPE PLAY-1,2
.................................. 75 dB
Equalizer frequency ........ 32 Hz, 63 Hz, 125 Hz,
250 Hz, 500 Hz, 1 kHz,
2 kHz, 4 kHz, 8 kHz, I6 kHz

Level variation range ....... $12 dB

Others

Power voltage ................. 120/220/24OV
(50/60 HZ)

For U.S.A, and Canada
.................................. 120V (60 HZ)
Power consumption ., 10 watts
Dimensions ..................... 345 mm (13-5/8) (W)
46 mm (I-7/8) (H)
220 mm (8-II/I6) (D)
Weight ............................ 2.0 kg (4.4 lbs) net
2.8 kg (6.2 lbs) packed

* Design and specifications subject to change without
notice for improvements.

Page 2

G-IVI77

CAUTION

1. The symbols, UL, CSA, BS, UK, EU, AS and XX in the parts list and
schematic diagram mean followings respectively.

UL ....................... Manufactured for U.S.A market
(Underwriters Laboratories approved model.)

CSA .................... Manufactured for Canadian market.

BS, UK ............... Manufactured for United Kingdom market.

EU ...................... Manufactured for European market.

AS ....................... Manufactured for Australian market.

XX ....................... Standard Version.

NON MARK ........ Common Parts.

2. Some printed circuit boards are not supplied as the assembled.
To separate these in this service manual, the stock Nos are not in-
dicated at the ends of the board names. However, the individual parts
on the circuit boards are provided by orders.

3. Since some of capacitors and resistors are omitted from parts lists
in this service manual, refer to the Common Parts List for capacitors
& resistors, which was issued on February 1983.

4. Abbreviations in this service manual are as follows.

C.R.
S.R.
Ce.R.
M.R.
F.R.
N.l.R.
A.R.
C.C.
C.T.

E.C.
E.L.

- 0Abbreviations List
: Carbon Resistor

: Solid Resistor

: Cement Resistor

: Metal Film Resistor

: Fusing Resistor

: Non-lnflammable Resistor
: Array Resistor

: Ceramic Capacitor

: Ceramic Capacitor,

Temoerature Compensation

: Electrolytic Capacitor
: Low Leak Electrolytic

Capacitor

E.B.

E.B.L.

Ta.C.
F.C.
M.P.
P.C.
G.C.
A.C.
V R.

8:V.R.

SW.

: Bi-Polar Electrolytic

Capacitor

: Low Leak Bi-Polar

Electrolytic Capacitor

: Tantalum Capacitor

: Film Capacitor

: Metalized Paper Capacitor
: Polystyrene Capacitor

: Gimmic Capacitor

: Array Capacitor

: Variable Resistor

: Semi Variable Resistor

: Switch