Technics SU-7300 Service Manual

el
TAPE DECK |
PLAY BACK
REC OUT
TAPE DECK 2
PLAY BACK
SU-7300
1C101,102
SVITA7136P
EQUALIZER
clol =RIO3
Soy3.3 330
RIOl 100K
RIOS 100K
ctit K1I00P
TR301,302
2SC828A
SWITCHING
10V33 330
C304 35VI0
SVDMZ314
RIT Clal
RII9 220K
V4aw FISK I/4W F205K
qua Rii2
Bi
Ore |_|
@ci2o |@ciis
Ri6 Rie
Ree eT Se aa |
C153 KO0.015 RIS3 18K
®ci54 K0.015 RIS4 18K
e®
[= SURI0SS 1B.
ae
TR201,202 TR205,206
2SA798
DIFFERENTIAL CURRENT MIRROR
c2tl 25v47
R209 27K
Notes:
1.
2.
J) tare |
REC/PLAY 3.
$1, $2:
S3:
S4:
So:
S6:
S3 g TAPE 2
SOURCE
@ TAPE 1
S4 TAPE2>1
SOURCE
TAPE1™2
Input selector switch in “PHONO” push position.
Sti (TUNER) S2...... (PHONO)
Tape monitor switch in’‘SOURCE” position.
@(TAPE 1)+=@(SOURCE)<=@(TAPE 2)
Recording mode switch in “SOURCE” position.
@(TAPE 1™2)<+@(SOURCE)<+@(TAPE 2 > 1)
Loudness switch in “OFF” position.
High filter switch in “OFF” position.
39.0)
C214 |Oc224
peso y 3 Meter range selector switch in ‘’X1"' position.
(X 1X 0.1)
. $8: Speakers selector switch in ‘“MAIN” position.
(MAIN**REMOTE)
. §9-1,S9-2: Voltage selector switch in ‘’110V” position.
@®(110V)}*+@(120V)}-> @(220V }+= ©(240V)
. $10: Power switch in “OFF” position.
SU-7300
10.
11.
(C71 siIndicated voltage values are the standard values for the unit measured by the
DC electronic circuit tester (high impedance) with the chassis taken as standard.
Therefore,there
may
exist
some
errors
in
the
voltage
values,
depending
on
the
internal
impedance of the DC circuit tester.
This schematic diagram may be modified at any time with the devolopment of new
technology.

Technics SU-7300 Specifications

General

Damping Factor	30
Speaker Load Impedance	4Ω to 16Ω
Input Sensitivity	2.5mV (MM)
Signal to Noise Ratio	90dB (line)
Channel Separation	55dB (line)
Output	150mV (line)