Technics SU-7300 Service Manual

Printed Circuit Board ...... Model SU-7300
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(63V 025A)
LEFT CH, SPEAKER TERMINAL
RIGHT CH. SPEAKER TERMINAL
OUTPUT METER
RIGHT CH.
METER LAMP
PLAYBACK
6 5 4 3 2 1
OUTPUT METER
LEFT
CH.
BALANCE
CONTROL
VOLUME
CONTROL
LOUDNESS
SWITCH
ere
ers
t
TR208
TR206
TR202
TR204
TR203
TR201
19,
CORY,
&
Qe
“a
2SC1885
25C828
2SA798
2SA564
2SA564
2SA798
PRE DRIVE CURRENT MIRROR = DIFFERENTIAL REGULATOR REGULATOR DIFFERENTIAL
PUSH SWITCHES
METER
LEVER
SWITCH
INPUT
SELECTOR
ifs Se,
PHONES
JACK
SPEAKERS
RANGE
HIGH
FILTER
BASS
CONTROL
TREBLE
CONTROL
BEC
MODE
TAPE
MON
'
E
t
AN
4
-
PHONO
TUNER
TR205
= cc — as 7 a : 25C828
- ¢ : . se Gbroowrrreae, °° CURRENT MIRROR
BE UPIC46 1) surioa
TR207
2SC1885
PRE DRIVE
i102
SVITA7136P B
EQUALIZER
MS&OE IN JAP
REC/PLAY
(TAPE |) PHONO
1c101
SVITA7136P
EQUALIZER
TR218
TR210
TR301
TR216
1R302
TR2N1
TR213
TR2z5
TR209
TR217
HEAT
SINK
2SB618
_2SC828
2S5C828A
2SD588
2SC828A
2SC1567
2SA794
2SD588
25C828
2SB618
HEAT
SINK
POWER
THERMAL
MUTING
POWER
MUTING
DRIVE
DRIVE
POWER
THERMAL
POWER
COMPENSATION
SWITCHING
SWITCHING
COMPENSATION
E
TR212
2SC1567
DRIVE
REC OUT = PLAYBACK — REC OUT TUNER PHONO GROUND
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SU-7300 [9] SU-7300 [10

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)