Sansui D 290 Service Manual

Page 1

SERVICE MANUAL OSPECIFICATIONS

Track format ................... 4-track/2»channel system
Tape speed ...................... 4.8 cm/sec.
Heads (2»head configuration)

STEREO CASSETTE DECK seam~---~::;::

Motor ............................. Capstan: Electronically
Controlled DC Motor
A" "I n. Reels: DC Motor
Wow/flutter .................... 0.05% max (WRMS)
- Fast forwarding (rewinding) time
(Sllver & BIECK Mndel) .................................. Approx. 85 sec. (for 060 tape)
Frequency response (~20 VU recording/playback)
Normal tape (LH) ....... 20 to 15,000 Hz
(3010 14,000 Hz :3 dB)
Chrome tape .............. 20 to 16,000 Hz
(30 to 15,000 Hz 3:3 dB)
Metal tape .................. 20 to 17,000 Hz

(30 to 16,000 Hz 3:3 dB)
Signal-to-noise ratio (recording/playback with metal tapei
DOLBY NR OFF ......... Better than 57 dB
DOLBY-B NR ON ....... Better than 67 dB
(above 5 kHz)
DOLBY-C NR ON ....... Better than 77 dB
(above 1 kHz)

Erasure rate (metal tape)
.................................. 70 dB min (1 kHzi
Recording bias frequency

CAUTION ........... .._... .................. 85 kHz
. . . _ Input sensrtIVIty/lmpedance
1. Parts identified by thegk symbol on the schematic LINE IN (REC) ............. 7o mvlioo kohms
' ' MIC ............... .. 0.5 mV/200~5,000 ohms
diagram and the parts list are critical for safety. Power requiremets VVVVVVVV 1201220/240v
Use only replacement parts that have critical 50/60 Hz
characteristics recommended by the manufacturer. For USA. and Canada
2. Make leakage-current or resistance measurements """""""""""" . ----------- 1 20V (60 HZ)
. , Power consumptlon ..... 14W
to determine that exposed parts are acceptably In- Dimensions ..................... 430 mm (16-15/16) w
sulated from the supply circuit before returning the 2; mm gm 3
' . mm -
appliance 10 the CUStomer' Weight ............................ 3.6 kg (7.9 lbs) net

4.6 kg (10.1 lbs) packed

Design and specifications subject to changes without notice for im-
provtmenls.

Noise reduclion system manufactured under license from Dolby Laborato-
ries Licensing Corporation.
Dolby" and the double 0 symbol are trade marks of Dolby Laboratories
Licensing Corporation.

SANSUI ELECTRIC CO., LTD.

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D-290

1. The symbols, UL, CSA, SA, 88, UK, EU, AS and XX on the parts

CAUTION

list and the schematic diagram mean followings respectively.

UL ....................... Manufactured for USA market.
(Underwriters Laboratories approved model.)

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

SA ....................... Manufactured for South African market.

88, 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.

EB.

--Abbreviations List
: Carbon Resistor

: Solid Resistor

: Cement Resistor

: Metal Film Resistor

: Fusing Resistor

: Non-inflammable Resistor
: Array Resistor

: Ceramic Capacitor

: Ceramic Capacitor,

Temoerature Compensation

: Electrolytic Capacitor
: Low Leak Electrolytic

Capacitor

: Bi-Polar Electrolytic

Capacitor

E.B.L.

Ta.C.
F.C.
MP.
P.C.
G.C.
A.C.
V.R.
S.V.R.
SW.
Chip R.:
Chip 0.:

: Low Leak Bi-Polar

Electrolytic Capacitor

: Tantalum Capacitor

; Film Capaéitor

2 Metalized Paper Capacitor
: Polystyrene Capacitor

: Gimmic Capacitor

: Array Capacitor

: Variable Resistor

: Semi Variable Resistor

: Switch

Chip Resistor
Chip Capacitor