Sansui AU D77X Service Manual

Page 1

AU-D77X

SERVICE MANUAL

Power output
Min. RMS, both channels driven, from 10 to 20,000 Hz, with
no more than 0.003% total harmonic distortion.

IIO watts per channel into 8 ohms.

INTEGRATED AMPLIFIER #313 malfaegaagrit $20203; 0.00000 0 0

below rated min. RMS

power output
- lntermodulation distortion (60 Hz: 7 kHz-4:1 SMPTE
method)

....................................... less than 0.003% at rated
power output
Frequency response (at I watt)
Overall (from AUX) .......... DC to 200.000 Hz.
+0 dB -3.0 dB
RIAA curve deviation (DISC-MM, 20 Hz to 20 kHz)
....................................... +0.2 dB, -0.2 (18
Input sensitivity and impedance {at I kHz)
DISC-MC ......................... 120 uV/3 ~40 ohms
DISC-MM ........................ 2.5 mV/47 kilohms
(Max. input capability; 200 mV at I kHz, less than
0.01% total harmonic distortion)
DISC-DA ......................... 150 mV/35 kilohms
AUX, TUNER, TAPE PLAY-l, 2
.................................... 150 mV/35 kilohms

"" Output level (1,000 Hz)
TAPE REC-I, 2 ................. I50 mV into 47 kilohms
Signal to noise ratio (short-circuit A-network)
DISC-MC ......................... 78 dB
DISC-MM ........................ 85 dB
AUX, TUNER, TAPE PLAY-l, 2
.................................... I I0 dB
Controls
SUPER BASS .................... $10 dB at I00 HI.
BASS ............................... :t It) dB at 330 Hz
MID. ............................... :t I0 dB at I kHz
MlDJ'iICLH ...................... 1-10 dB at 3.3 kHz
TREBLE ............................ 1:10 dB at K) kHz
Filter
LOW ............................... --3 dB at 16 HZ
(6 dB/oct)
HIGH .............................. -3 dB at 20 kHz
(6 dB/oct)
lOUDNESS .......................... +8 dB at 50 HZ

(VOLUME: ~30 dB position)
v .................................... +6 dB at IO kHz
Power requirement

CAUTlON Power vgltage .......... a ....... I zgeiongiov (50/00 Hz)
. A. . For t).. .A. 80 Cana a 12 6 z)

1 ' Parts Identified by Ih8,."l}8ymb0l ON the SChemat'C Power consumption ......... 390 watts 460 VA Rated
diagram and the parts llSl are critical for safety. . 560 watt; Maximum
Use only replacement parts that have critical charac- Omen-0'15 -------------------------- iii? 2: 863/135 16! W
teristics recommended by the manufacturer. 333 mm (134,80) D

2. Make leakage-current or reelstance measurements Weight ................................. 11.7 kg (25.3 lbs) net
to determine that exposed parts are acceptably in- '3-0 kg (28-; lbs-l 933de
SUlated from the SUpply CerUil before returnlng the I ' Design and specifications subiect to changes without notice for im-
appliance to the customer. 000000.000.

-4-.~

Sauna:
SANSUI ELECTRIC (30., LTD.

Page 2

1. The symbols, UL, CSA, BS, UK, EU, AS and XX on the parts list and

CAUTION

the schematic diagram mean followings respectively.

UL ....................... Manufactured for USA 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.I.R.
A.R.
CO.
CT.

E.C.
E.L.

~- -Abbreviations 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

S.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