Sansui D 550WR Service Manual

Page 1

D- SSOWR

SERVICE MANUAL . SPECIFICATIONS

Track format ........ 4 tracks conpateble stereo
Tape speed .......... 4.75 cm/sec
Heads
STEREO CASSETTE DECK Rec/play head ------ HIGH-Es hard permelloy
Play head --------- HIGH-B: hard permelloy
Erase head - . - Double-gap HIGH-Es ferrite

Motor ------------- Electronically controlled DC
motor x 2
Reels: DC Motor x 2

Wow/flutter . . . ...... 0.35% max (WRMSl
Fast forwarding (rawinding)
time. . . . . ........ .Approx. 120 sec.

(for C-60 tape)
Frequency response 1-20 VU recording/playback)

Normal tape (LH). . . .125 to 12.5KHz
Chrome tape ....... 125 to 12.5 KHz
Metal tape ........ 125 to 12.5KH2
Signal-to-noise ratio (recording/playback with metal tape)
.v.t.nm.wu.m um .Iwt....w.. DOLBY NFi OFF . . . .Better than 40 dB
DOLBY NR 0N ..... Better than 55 dB

OIZIO

q-c-rsntommb

NR EFFECT 8.5 dB
Erasure rate (metal tape). Mote than 70 dB at1 kHz
Recording bias frequency 105 kHz
Input sensitivity/impedance

[ 0 El 0
<1 mg I)

@ I an I..[»|umj:l I I nvl<<|>h [mill-WI LINE IN (REC) ..... 450mV/47 kohms
Power requirements. . . . .110/120/230V
50/50 Hz
For U.S.A. and Canada 120V (GOHzl
Power consumption ..... 10 watts
Dimensions . . ....... 430 mm (T6-15/16"i W
115 mm (5") H

270 mm (8-31/32) D
W ' h .. .......... 4.3K (9.68M)!
CAUTION 9' 5.1 k: (11.44 lisiiuked

1. Parts identified by the A symbol on the schematic _ . . . . -
. Design and specmcatIons subject to changes Without

diagram and the parts list are critical for safety. "magic, improvement5_
Use only replacement parts that have critica| chemo. 0 Noise reduction system manufactured under license
teristics recommended by the manufacturer. from Dolby Laboratories Licensing Corporation.

_ - Dolby" and the double D symbol are trade marks
2. Make leakagecurrent or reSIstance measurements Dolby Laboratories Licensing Corporafim

to determine that exposed parts are acceptably in-
sulated from the supply circuit before returning the
appliance to the customer.

SANSUI ELECTRIC CO., LTD.

Page 2

D- 550WR

NOTE

1. The symbols, UL, CSA, SA, BS, UK, EU, AS, SEV, SS, XX (EXPORT)

and XX-V (EXPORT (V) i on the parts list and the schematic diagram
mean followings respectively.

UL .............. Manufactured for U.S.A market.
(Underwriters 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.
SEV ............. Manufactured for Swiss market.
SS .............. Manufactured for Saudi Arabia market.
XX (EXPORT) ...... Standard Version with Inner Voltage
Selector.
XX-V (EXPORTiV) )... Standard Version with Outer Voltage Selector.
NON MARK ........ Common Parts.

. Some printed circuit boards are not supplied assembled. To separate

these in this service manual, the stock numbers are not indicated for
these boards. However, stock numbers for individual parts are indicated.

. Since some capacitors and resistors are omitted from parts lists in this

service manual, refer to the Common Parts List for capacitors and resis-
tors, which was issued on June 1987.