Sansui TU S77X Service Manual

Page 1

SERVICE MANUAL

DIGITAL SYNTHESIZER TUNER

SANSIJI Tll-S77ll/S77llw

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 in-
sulated from the supply circuit before returning the
appliance to the customer.

Sans-u].
SANSUI ELECTRIC C0., LTD.

oSPECIFICATIONS
PM Section
Tuning range ................... 88 to 108 MHZ
Usable sensitivity
Mono IHF .. ..10.8 dBi (19 av : T100)

DIN . .. .
50 dB quieling sensltmty
Mono... .. .
Stereo .. ., 37.7 dBf
Signal to noise ratio at 85 dBf
Mono
Stereo ..
Distortion at
Mono...
Stereo ..
Alternate channel selecli ty (at 400 kHz)
NARROW... .
Capture ratio ..
Image response ratio. ,.
Spurious response ratio... 100 dB

Stereo separation ............ 60 dB at 1,000 Hz
Frequency response
Stereo ........................ 20 to 15,000 Hz

+0.2 d8, 705 dB
Antenna input impedance
.................................. 300 ohms balanced
75 ohms unbalanced

AM Section
Tuning range
Usable sensitmty
Signal to noise ratio..
Image response ratio,

Others
Output voltage and impedance
., 775 mV/2.2 kilohms

.. 530 to 1,600 kHz
50 dB/m (316 pV/m)
50 dB

.. 45 dB at 1,000 kHz

Power requirements.. .. 120/220/240V
50/60 Hz
For U.S.A. and Canada
.. 120V (60 Hz)
Power consumption .. .. 13W
Dimensions
w/o sidewood ............. 430 mm (16-15/16")W

57 mm (2-1/4)H
306 mm (12-1/16')D
w/ sidewood ............... 466 mm (18-3/8")W
57 mm (2-1/4')H
306 mm (l2-1/16)D

Weight
w/o sidewood ............. 3.5 kg (7.7 lbs) net
4.3 kg (9.5 lbs) packed
w/ sidewood ............... 4.0 kg (8.8 lbs) net

4.8 kg (10.6 lbs) packed

- Design and specifications subbed lo change without notire ior im-
provements.

Page 2

CAUTION

1. The symbols, UL, CSA. BS. UK. EU, AS and XX on the parts list and
the schematic diagram mean followings respectively.

UL ....................... Manufactured for U.S.A market.
(Underwriters Laboratories approved model.)

Manufactured for Canadian market.
. Manufactured for United Kingdom market.

. Manufactured for European market.

. Manufactured for Australian market.

. Standard Version.

.. Common Parts.

CSA ..............

NON MARK ..

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.

oAbbreviations List

CR :Carbon Resistor E.B. : Bi-Polar Electrolytic

S.R. : Solid Resistor Capacitor

CeR. :Cement Resistor E.B.L. : Low Leak Bi-Polar

M.R. : Metal Film Resistor Electrolytic Capacitor

F.R, : Fusing Resistor Ta.C. : Tantalum Capacitor

N.I.R. : Non-Inflammable Resistor FC. : Film Capacitor

A.R. :Array Resistor M.P. : Metalized Paper Capacitor

C.C. : Ceramic Capacitor P.C. : Polystyrene Capacitor

C,T. : Ceramic Capacitor, G.C. : Gimmic Capacitor
Temoerature Compensation A,C. : Array Capacitor

EC. : Electrolytic Capacitor V.R. : Variable Resistor

E.L. : Low Leak Electrolytic S.V.R. : Semi Variable Resistor

Capacitor SW. : Switch