Technics SU 300 MC Service Manual

Page 1

ORDER NO 5078044319

e Service Manual

MC Pre-Preamplifier

SU-BOOMC
(XA)

o The model SU-300MC(XA) is available
in Asia, Latin America. Middle East and

Africa only.
TECHNICAL SPECIFICATIONS (Specifications are subiect to change Without notice for further improvementl
Voltage gain 28dB(MCJ/OdBlMM) Battery lilo about 200 hours (used
" Input impedance 470 2 hours daily)
Equivalent noise level at the input -150dBV (Based on use of National Panasonic
S/N (lHF. A) HirTop batteries at 20°C ambient

78418 lzsouv lnput)
70dB n 00 v Input)

Frequency response 20Hz~20kHz :85dB
8Hz~300kHz :gae
Total harmonic distortion 0.01% (With Technlcs

81.179070 stereo llat preamplifier)
Pawer supply DC4V5VX2lt4 5V)
Baltenes SIX UMMslze D)

Power consumption 450mW

Dimensions (WxHxD) l40><55><265 mm
1 ikg
Connection cord ...... 1

temperature
Battery lift decreases at ambient
temperature of 5°C or less)

Technics

Matsushita Electric Trading 00., Ltd.
PO, Box 288. Central Osaka Japan

Page 2

. Using a corn or snmilar object,

V Pull off the knob of selector swrtch,

. When the two screws (@ ll'l flg. 3)

, The amplifier cabmet and printed-

. LOCATION OF CONTROLS

ban check
lpower omrwvr - yrc

OUTPUT GRO{UND PHONO INPUT

POWER AND PHONO SELECTOR INDICATOR

POWER AND
BATTERY BOX PHONO SELECTOR

'i

l
l

MC PRE~PRE AMP RELAY DRIVER

TO REMOVE CABINET AND PRINTED CIRCUIT BOARD

remove the two screws (Q) in fig. 1)
Set the unit upright\The amplifler
cabinet can be removed by pulling

rt sllghtly toward you Kuntil II hits
somethrng, and then lrftrng it upward.
(Refer to fig, 2)

SCREWS G)

and remove the screw l® ln fig 3)
holdlng the indlcator. Fig. 1
Remove the screw ((33 In frg. 3)
holding the player input termrnal
relnforcement IIIIng

holding the prmtedecircurt board
and the selector switch are
removed, the printed-Circuit board
can be removed

SCREW (Z)

c:rcu1t board can be Installed by
followmg these steps In reverse.

sc news @

Fig. 3