Sansui D 900 W Service Manual

Page 1

ll

SANSUI

SERVICE MANUAL

D-QOOW

STEREO CASSETTE DECK

gamma o-900w

E: El

IIEIE
U690?
H /

Hummus: n

l> «oblique glaucomnu r
f

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 characteristics
recommended by the manufacturer.

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

X the customer.
0 SPECIFICATIONS
Track format ....... 4-track/2-channel system Signal-to-noise ratio (recording/playback with metal tape)
Tape speed ........ 4.75 cm/sec DOLBY NR OFF . . . Better than 45dB
Heads DOLBY-B NR ON . . Better than 55 dB
Rec/play head ..... HIGH-Bs hard permalloy Erasure rate (metal tape) . More than 70 dB at 1 kHz
Play head ....... HIGH-Bs hard permalloy Recording bias frequency 105 kHz
Erase head ....... Double-gap HIGH-Bs ferrite Input sensitivity/ Impedance
Motor ........... Electronically control led DC Ll NE IN (REC) BOmV/47 kohms
motor x 2 Power requirements . . . 120V220 ~240V
Reels: DC Motor x 2 50/60 Hz
Wow/flutter ........ 0.2% max (WRMS) For U.S. A. and Canada 120V (60 Hz)
Fast forwarding (rewinding) Power consumption -. . . 13 watts
time ............ Approx. 140 sec. Dimensions ........ 430 mm (1645/16") W
(for 0-60 tape) 127 mm (5) H
' Frequency response (-20 UV recording/playback) 228 mm (8-31/32) D
Normal tape (LH) . . 50 to 13,000 Hz i3dB Weight ........ . . . 3.6 kg (7.9 lbs) net

Chrome tape . . . . . 50 10 15,000 HZ i3GB
Metal tape ....... 50 to 15,000 Hz isde

I)

4.5 kg (9.9 lbs) packed

Deslgn and specifications subject to changes without
notice for improvements.

Due to local laws and regulations, this unit sold in some
areas is not equipped with variable voltage selector.

Dolby noise reduction system manufactured under
lincense from Dolby Laboratories Licensing Corporation
"Dolby" and the double D symbol are trade mar ks of
Dolby Laboratories Licensing Corporation.

Page 2

'NOTE

1. The symbols, UL, CSA, SA, BS, UK, EU, AS, SEV, 35, XX (EXPORT)
and XX-V (EXPO RT (V) ) 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.
35 .............. Manufactured for Saudi Arabia market.
XX (EXPO RT) ...... Standard Version with Inner Voltage
Selector.
XX-V (EXPORT(V) l... Standard Version with Outer Voltage Selector.
NON MARK ........ Common Parts.

2. 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.

3. 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 March 1987.

. D-SOOW l