Panasonic SU-373 Service Manual

Stereo Integrated Amplifier
ORDER NO. HAD87051 20C1
Amplifier
SU-373
Color
(K)...Black Type
SPECIFICATIONS (IHF' 78)
M@ AMPLIFIER SECTION
Rated minimum sine wave RMS power
output
20 Hz~20 kHz both channels driven
0.09% total harmonic distortion
100W per channel (8 ohms)
1 kHz continuous power output
both channels driven
0.09% total harmonic distortion
105W per channel (8 ohms)
Dynamic headroom 1.1 dB (8 ohms)
Total harmonic distortion
half power at 1 kHz 0.09% (8 ohms)
SMPTE intermodulation distortion
0.09% (8 ohms)
Note:
Frequency response
PHONO RIAA standard curve +0.8 dB
TUNER, CD/AUX, TAPE 1, TAPE 2/EQ
10: A270 KHZ; —3:dB
Total harmonic distortion is measured by the digital spectrum analyzer (H.P. 3045 system).
Specifications are subject to change without notice for further improvement.
Mi CONTENTS
SAFETY PRECAUTION ..........-.
PROTECTION CIRCUITRY .........-
BEFORE REPAIR......-++ +2 sees
HOW TO CONNECTION.......-...-:
LOCATION OF CONTROLS........
DISASSEMBLY INSTRUCTIONS ......
BLOCK DIAGRAM ......++++++:5
Panasonic.
Matsushita Services Company
50 Meadowland Parkway,
Secaucus, New Jersey 07094
Panasonic Hawaii, Inc.
91-238, Kauhi St. Ewa Beach
P.O. Box 774
Honolulu, Hawaii 96808-0774
Tone controls
BASS
TREBLE
Loudness control (volume at ~ 30 dB)
50 Hz. +10 dB~ -10 dB
20-KH2,. 4 10: dB==—10' dB
Input sensitivity 50 Hz, +9 dB
PHONO 0.4 mV (2.5 mV, IHF '66) Output voltage
TUNER, CD/AUX, TAPE 1, TAPE 2/EQ TAPE 1, TAPE 2/EQ REC OUT 150 mV
15 mV (150 mV, IHF '66) Low frequency damping factor 50 (8 ohms)
S/N (IHF, A) Load impedance
PHONO 71 dB (73 dB, IHF '66) MAIN or REMOTE 8~16 ohms
TUNER, CD/AUX, TAPE 1, TAPE 2/EQ MAIN and REMOTE 8~16 ohms
75 dB (94 dB, IHF '66) @ GENERAL
Maximum input voltage ;
PHONO 128 mV (135 mV, 1 kHz) Power consumption 360W, 470 VA
Input impedance power supply | AC 120V, 60 Hz
PHONO A? ionic Dimensions (WxHxD) 430 x oe x 240 mm
TUNER, CD/AUX, TAPE 1, TAPE 2/EQ TO: eee a
opciones Weight 7.0 kg (15.4 Ib.)
Page Page
roe tee 2 CIRCUIT BOARD AND WIRING
soe eee 2 CONNECTION DIAGRAM.... 9~ 12
ee Sa ee S 2 SCHEMATIC DIAGRAM ................. 13 ™~ 16
soe ee 3 RESISTOR & CAPACITORS ............... 17
ses 4 REPLACEMENT PARTS LIST.............. 18
Dee 5,6 EXPLODED VIEWS...............+..... 19, 20
eee, Ghana rs 7,8
Panasonic Sales Company,
Division of Matsushita Electric
of Puerto Rico, Inc.
Ave. 65 De Infanteria, KM 9.7
Victoria Industrial Park
Carolina, Puerto Rico 00630