Sansui AM 99 Service Manual

Page 1

SERVICE MANUAL

INTEGRATED SERVO AMPLIFIER

SANSUI A-M99

CAUTION

1. Parts identified by the L 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.

Sansuj.
SANSUI ELECTRIC CO., LTD.

'Specifications

Power output
Mm. RMS, both channelsdriven. lrorn20to 20,000 H/ mth
no more than 0.07% total harmonic distortion.
70 watts per channel into él ohms.
Load impedance ............. 8 ohms
Total harmonic distortion
.. less than 0.07% at or belou
rated nun RMS power output
Frequency response (at 1 watt]
...................... l0 to 60,030 H7i +03 dB.
72 dB
RIAA curve deviation (PHONO. 30 Hz to 20 kllzt
.. ............. +0.5 d8,"0.5 (l8
ty and impedance (I kHz, for rated trowel

()utputl)
PHONO .................. 2.5 mVi47 kilohms
(Max. input capablltly: lSD my at l kllz, less than
05% total harnmniC distortion)
TUNER, TAPE PLAY ll, 2), AUX/[IA
. l§tl mVl4 kilohms

Mic .

.. O 3 rnV/lf l Output level ti kk7i
TAPE REC. . . .. . .. I50 mV iito 47 kilohrns

Signal to noise ratio lSltUl'l'UILult. Anetwork)
PHONO ,. .. 72 dB
TUNER, l/\PE PLAY (i, Z), AUX/[A
................. , ltll) dB
Power requirements
Power v0|tage......... . . llthlOiZ-U V (30W) H?)
For USA. & Canada 120 V (em |/)
Power consumption. 2&0 watt5180 VA Rated
I30 watts Maximum
Dimensions... .. . . E413 mm 075/8) W
lll mm l-rt/ti l H
234 mm 1-l/4 l D
Weight . ., ,. .. 5.4 kg (ll t lbs] net
6.1 kg tl37 lbs.) packed

Design and specifications subiecitn change without
notice for improvements.

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CAUTION

. The symbols, UL. CSA, 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.

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.

. Abbreviations in this service manual are as follows.

-Abbreviations List ,

C R Carbon ReSIstor E B ' Bi-Polar Electrolytic

S R Solid FleSistor CapaCitor

CeR Cement Resrstor EB L Low Leak Bi-Polar

M R. Metal Film Resistor Electrolytic CapaCitor

FR ' Fusing Resistor Ta.C Tantalum Capacnor

N.I R. .Nonrlnflammable ReSistor F.C Film CapaCitor

A.R. Array ReSistor M P ' Metalized Paper CapaCiIor

C C ' Ceramic Capacitor F C Polystyrene Capacitor

C T Ceramic Capacitor. G,C. Gimmic CapaCitor
Temperature Compensation A C ' Array CapaCitor

E C . Electrolytic CapaCitor V.R Variable ReSistor

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

CapaCItor SW. . Swrtch