Sansui D 905 R Service Manual

Page 1

T F D-905R

l SERVICE MANUAL OSPECIFICATIONS

Tirack format ............... 4-track/2-channel system
T'ape speed ...... 4.8 cm/sec.
Heads (3-head eon iguration)

COMPU_REVERSE CASSETTE DECK Rec/ob head ............... Brigade} 32%? coating

Erase head .................. Double-gap HIGH-BS ferrite
Motor ............................. Capstan: Electronically
"I I 5 Controlled DC Motor
Reels: DC Motor
Wow/flutter 0.034% max (WRMS)
*0.7%W.Peak

Fast. forwarding (rewinding) time
.................................. Approx. 85 sec. (for (2-60 tape) l
Frequency response [-20 VU recording/playback)
Normal tape (LH) ....... 20 to 18,000 Hz
(30 to 17,000 Hz :3 dB)

Chrome tape .............. 20 to 20,000 Hz
(30 to 18,000 Hz i=3 dB)
Metal tape 20 to 21,000 Hz

(30 to 19,000 Hz :3 dB)

Signal to noise ratio (recording/playback with metal tape)

(3% T.H.D.)

DOLBY NR OFF ......... Better than 60 d8

DOLBY-B NR ON ....... Better than 68 dB

DOLBY-C NR ON....... Better than 74 dB
Erasure factor (Metal Tape) 7

.................................. more than 65 dB at (1 kHz)
Recording bias frequency

- I .................................. 85 kHz
- Input sensitivity/impedance .
CAUTION LINE IN (REC)....,........ 80 mV/50 kohms
ll . . . I Power requirements ........ 11'0~120Vl220~'240 V
1. Parts identified by theAsymbol on the schematic 50/60 HZ
diagram and the parts list are critical for safety. F" '5" andCana-danov (60 HZ]
Use only replacement parts that have critical charac- Power consumption ........ 32 watts
tenstics recommended by the manufacturer. Dimensions ..................... 435 mm (17-1/8)W
_ 115 mm (4-1/2)H
2. Make leakage-current or reSIstance measurements 282 mm (m ,MD
to determine that exposed parts are acceptably in- Weight ............................ 5.4 kg (11.9 lbs) net
sulated from the supply circuit before returning the For USA and Canada I
appliance to the customer. ............................. 49 kg (10.8 b5) net
_ __. Design and specifications subiect to changes without notice for im-
provements.

' Noise reductionsystem manufactured underiicense from Dolby Laborato-
ries licensing Corboration.
Dolby" and the double D symbol are trade marks of Dolby Laboratories
licensing Corporation.

SANSUI ELECTRIC CO, LTD.

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' D-905R

CAUTION

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

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.

BS, UK ............... Manufactured for United Kingdom market.

EU ...................... Manufactured for European market.

AS ....................... Manufactured for Australian market.

XX ....................... Standard Version.

NON MARK ........ Common Parts.

. 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.

. 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.