Sansui D 705 Service Manual

Page 1

SERV CE MANUAL

STEREO CASSETTE DECK

SANS!" 0-705

3 m. a.

CAUTION

1. Parts identified by the A symbol on the schematic
diagram and the parts list are critical for safety.
Use only replacement parts that have critical charac-
teristics 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.

Sansui.
SANSUI ELECTRIC CO., LTD.

'SPECIHCATIONS

Track format 4vtrack/27channel system

Tape speed .. 4,8 cm/sec.

Heads t3-head configuration;
Play head ....... . HIGH 85 hard permalloy
Recording head HIGH-85 hard permalloy
Erase head, Double-gap HIGH-BS ferrite

Motor ,, .. . Constant Electronically

Controlled DC Motor
R9655: DC Motor
Wow/flutter .................. 00353'u max lWRMSi
Fast forwarding (rewinding) time
................. Approx, 85 >ec.
(for 060 lapel
Frequency response [7 20 VL, recordingplayhackl

Normal tape (LH) ....... 20 to l8,000 Hz

{30 to l7,000 Hz :3 d8)
Chrome tape ............. 20 to 20,000 Hz

(30 to 18,000 Hz *3 dB)
Metal tape ................ 20 to 21.000 H7

[30 to 20,000 Hz i3 dB)

Signal-to-noise ratio (recording/playback with metal tape}

DOLBY NR OFF V. ,Better than 60 d8

DOLBYVB NR ON . Better than 66 dB

DOLBV-C NR ON ...... Better than 74 dB
Erasure rate lmetai tape}

............................... More than 70 dB at 1 kHz
Recording bias frequency

......................... 105 kHz
Input sensitivity/Impedance
LlNl' lN (INCL... .70 iv/'47 konma
Power requiremets ........ lZO/ZJO/NOV
50/60 Hz
For U S A
., HOV L60 Hz;

30 watts

.. 430 mm EMS/16"} W
'lll mm (4-338 ) H
3l0 mm Hill/4") D

Weight ....................... 5.9 kg ll3.0 lbs) not

7 2 kg il5.3 1b,») packed

Power consumption
Dimensions

A Design and apatitinalilms sulmrd lo (hanxc without notiw rm my
movements.

- Noise reduction wit-m manulatturud under lirenarimm Dolby lahomln-
vies Licensing (mpnmion.
"Dolby" and the double 0 symbol m trade markmf 00th Laboratories
th easing Corporation.

#41

Page 2

705

CAUTION
t. The symbols, UL, CSA, SA, BS, UK, EU, AS and XX on the parts R /
list and the schematic diagram mean followings respectively.
UL ....................... Manufactured for U.S.A market.
(Unden/vriters Laboratories approved model.)
CSA .................... Manufactured for Canadian market.
SA ........ . Manufactured for South African 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 1
on the circuit boards are provided by orders.

3. Since some of capacitors and resistors are omitted from pans 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.

~Abbreviations List

CR : Carbon Resistor E.B.L. : Low Leak Bi-Polar ,
SR : Solid Resistor Electrolytic Capacitor "
Ce.R. : Cement Resistor Ta.C. : Tantalum Capacitor
M.R, : Metal Film Resistor F.C. : Film Capacitor
F.R. : Fusing Resistor M.P. : Metalized Paper Capacitor 1
N.l.R. : Non-Inflammable Resistor P.C. : Polystyrene Capacitor .
A.R. : Array Resistor 6.0. 2 Gimmic Capacitor
CC. : Ceramic Capacitor AC : Array Capacitor
C.T. : Ceramic Capacitor, V.R. : Variable Resistor

Temperature Compensation S.V.R. : Semi Variable Resistor
EC. : Electrolytic Capacitor SW. : Switch
E.L. : Low Leak Electrolytic Chip R. : Chip Resistor

Capacitor Chip C. : Chip Capacitor
EB. : Bi-Polar Electrolytic

Capacitor