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Panasonic SU-373 Service Manual

Panasonic SU-373 Service Manual

Stereo integrated amplifier
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Service
Stereo Integrated
6
SPECIFICATIONS
AMPLIFIER
SECTION
Rated minimum sine wave RMS power
output
20 Hz
20 kHz
both
channels
0.09%
total
harmonic
distortion
IOOW per channel
1 kHz continuous
power output
both
channels
driven
0.09%
total
harmonic
distortion
105W per channel
Dynamic
headroom
Total
harmonic
distortion
half power at 1 kHz
SMPTE
intermodulation
distortion
Note:
Total harmonic
distortion
IS measured
Specifications
are subject to change without
CONTENTS
SAFETY
PRECAUTION
PROTECTION
CIRCUITRY
BEFORE
REPAIR
HOW
TO
CONNECTION
LOCATION
OF
CONTROLS
DISASSEMBLY
INSTRUCTIONS
BLOCK
DIAGRAM
Panasonic
Amplifier
(IHF' 78)
Frequency
PHONO
TUNER,
driven
Input sensitivity
(8 ohms)
TUNER,
S/N (IHF, A)
PHONO
TUNER,
(8 ohms)
1 1 dB (8 ohms)
Maximum
input voltage
PHONO
0.09% (8 ohms)
Input impedance
0.09% (8 ohms)
PHONO
TUNER,
by the dlgltal spectrum
notice for further
.
.
.
Manual
response
RIAA
standard
curve
-SO 8 dB
CD/AUX,
TAPE
1, TAPE
2/EQ
10 Hz—70
kHz.
-3
04 mV (25 mv, IHF '66)
CD/AUX,
TAPE 1, TAPE 2/EO
15 mV (150 mV, IHF 66)
71 dB (73 dB. IHF '66)
CD/AUX,
TAPE
1, TAPE
2/EQ
75 dB (94 dB, IHF '66)
128 mV (135 mv. 1 kHz)
47 kilohms
CD/AUX.
TAPE
1, TAPE
2/EG
20 kilohms
analyzer
(H P 3045 system)
improvement.
Page
2
CIRCUIT
BOARD
2
2
SCHEMATIC
DIAGRAM
RESISTOR
& CAPACITORS
4
REPLACEMENT
EXPLODED
VIEWS
Matsushita
Services Company
Panasonic
91-238, Kauhi St. Ewa Beach
50 Meadowland
Parkway,
Secaucus,
New Jersey 07094
P.o.
Honolulu,
ORDER
SCI-373
Color
(K)...Black
Color
(K)
System
SC-3730
Tone
controls
BASS
TREBLE
20 kHz.
dB
Loudness
control
(volume at
Output voltage
TAPE 1, TAPE 2/EQ REC OUT
Low frequency
damping
Load impedance
MAIN
or REMOTE
MAIN
and
REMOTE
GENERAL
Power consumption
Power supply
Dimensions
(WXHAD)
(16-15/16"
Weight
AND
WIRING
CONNECTION
DIAGRAM
PARTS
LIST
.
Panasonic
Hawaii, Inc.
Division
Of Puerto Rico, Inc.
Box
774
Hawaii 96808-0774
Ave. 65 De Infanteria.
Victoria
Carolina,
NO.
HAD8705120C1
Amplifier
Type
Area
U.S.A.
50 Hz.
+10
dB
-10
dB
+ 10 dB
-10
dB
30 dB)
50 HZ, 49 dB
150 mv
factor
50 (8 Ohms)
8—16
ohms
8—16
ohms
360W,
470 VA
AC 120V. 60 Hz
430
X 119
X 240
mm
X 4-11/16"
X 9-7/16"
70 kg (15 A lb
Page
9 -v
12
13
16
. 17
18
19, 20
Sales Company,
of Matsushita
Electric
KM 9.7
Industrial
Park
Puerto
Rico 00630
loading
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Summary of Contents for Panasonic SU-373

  • Page 1 & CAPACITORS LOCATION CONTROLS REPLACEMENT PARTS LIST 19, 20 DISASSEMBLY INSTRUCTIONS EXPLODED VIEWS BLOCK DIAGRAM Panasonic Sales Company, Matsushita Services Company Panasonic Hawaii, Inc. Division of Matsushita Electric 91-238, Kauhi St. Ewa Beach 50 Meadowland Parkway, Panasonic Of Puerto Rico, Inc.
  • Page 2 SAFETY PRECAUTION (This "safety precaution" is applied in U.S.A.) I. Before servicing, unplug the power cord to prevent an electric shock. 2. When replacing parts, use only manufacturer's recommended components for safety. 3. Check the condition of the power cord. Replace if wear or damage is evident. 4.
  • Page 3: How To Connect

    AC power supply cord Stereo connection (Included cable (Short) in amplifier) Flat cable for remote-control Amplifier (SU-373) rTAPE11 rTAPE2/EQ1 Amplifier AC OUTLET PLAY PRE MAIN REC PLAY OUT BACK OUTIN CD'AUX OUT BACK TAPEI oeoOO@...
  • Page 4 LOCATION CONTROLS Peak-power meters (power level meter) Volume/balance level indicator (volume/balance) Power switch (power) Volume-controls (volume) Loudness switch (loudness) Balance controls Headphones Tape-monitor selector/indicator jack (phones) (balance) (tape 2/EQ) Input selectors/indicators (input selector) Speaker selectors (speakers) Tone controls (bass/treble) tapel output Playback TAPE?
  • Page 5 • DISASSEMBLY INSTRUCTIONS Ref. to remove the main P.C.B. "ATTENTION SERVICER" Ref. How to remove the front panel. Procedure SOME CHASSIS COMPONTS HAVE SHARP I. Remove the 10 screws ( EDGES. BE CAREFUL WHEN DISASSEMBLING 2. Remove the main P.C.B. Procedure SERVICING.
  • Page 6: Block Diagram

    BLOCK DIAGRAM MAIN TC601 METER 0257 0255 omporator 1 C301 IC202 Muting EOIJAL ATTENUATOR TONE control VOLUME CONTROL) RIAA IC201 power level meter 0601,603,605,607,609 p H ONO -10 dB HEADPHONES I c 50 Treble POWER TUNER 25 1 (REMOTE) Bo ss CD/AUX Bias REMOTE...
  • Page 7 CIRCUIT BOARDS AND WIRING CONNECTION DIAGRAM TUNER TAPE REMOTE CONTROL TAPE2/EXT MAIN SPEAKERS ( REC OUT) (PLAYBACK) (TAPE) (TUNER) REC OUT) (PLAYBACK) ( Rch) iilltl\ ( Lch MAIN C106 "*+0282 D704 C289 0702 0258 EQUALIZER/INPUTSELECTOR/VOLUME CONTROL/ TONECONTROLS/POWER A MPLIFIER CIRCUIT BOARD C 703 1 12 MICRO COMPUTER/METERAMP.
  • Page 8 • Terminal guide of transistors, diodes IC's OUTLETS M50720407SP 42Pin ( 120v 60HZ ( UNSWITCHED) ( UNSWITCHEO) 28Pin TC9163N 20Pin TC9177P 0711 SV13105B 18Pin M5218L M5238L C701 '201 J 202 T701 Power transformer RS13 SVIBA6144 2SA992E LOUÖü s 14 (REMOTE) (MAIN) 2SK301 2SD1265—0...
  • Page 9 MAIN SCHEMATIC DIAGRAM L ch L ch sovo M5238L EQUALIZER CIRCUIT TONE C' 09 'C 301 IC202 M5218L TC9177 EQ. AMP VOLUME CONTROL PIONO R' 04 0258 0257 IC202 oooooo oooooo TUNER CONT 13 Sv 0255 R109 CD/AUX C225 R toe Ci09 ooze I-Rch...
  • Page 10 MAIN Notes: POWER AMPLIFIER CIRCUIT : Volume, "Down" switch, C4i0 RS13 2*330 HEADP}ONES . Volume, "Up" switch. A IC501 Balance, "Right" switch. c 409 SV13105B 4. S4 Balance, Left" switch. MOTE POWER Loudeness switch. . Input selector, "Tape2/ext" switch. 02S7,2S8 2SK301 : Input selector.
  • Page 11: Parts List

    Note • REPLACEMENT PARTS LIST 1. Part numbersare indicated on most rnechanicalparts. Please use this part number for parts order. 2. Importantsafetynotice: Components identifiedby markha•.e specialcharacteristics i mportantfor safety. Note: • Imporünt "few notice. Whenreplacing any of thee components, useonly manufacturer's specified parts. Rzistor Type W•ttne...
  • Page 12 SU-373 EXPLODED VIEW r Transformer Fuse Power %itch P.C.B. Headphones P.C.B. 21—1 Loudnes P.C.B. Main P.C.B. 1—1 LED P.C.B. Printed in Japan — 20 — 870503800 @YY/TS...