Yamaha as 700
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Page 1
INTEGRATED AMPLIFIER
A-S7OO
SERVICE MANUAL
IMPORTANT NOTICE
This manual has been provided for rhe use of aurhcrized YAMAHA Readers and rheir service personnel,
Ii has been assumed rhai basic service procedures inhereni to rhe indusrry. and more specifically YAMAHA Producis. are already known
and undersrood by ihe users. and have rhererore nci been resulted.
WARN
Failure to follow appropriaie service and safety procedures when servicing ihis produci may resulr in personal injury
desimcrion of expensive componenis. and failure of ihe producr to perform as specified. For ihese reasons. we advise
all YAMAHA produci owners rhar any service required should be performed by an aurhorized YAMAHA Rerailer or
ihe appoinred service represeniaiive
IMPORTANT: The presenranon Or sale or IhIS manual ro any individual or firm does noi consrinire auiliorizanon. celtificaiion or
recognirion of any applicable iechnical capabiliiies. or esrablish a pl'lncipleragem relaiionship or any form.
The dara provided is believed id be accuraie and applicable io rhe |Im[(S) rndicared oii ilie cover. The research engineering. and service
deparrnaenis or YAMAHA are connnually srriving to improve YAMAHA producrs. Modiricarions are. Iherefore. iireviiable and
specifications are subyecr ro change wIIIlout norice or Obligallon io reirorii. Should any discrepancy appear Io exisl. please cOillacI Ihe
disiriburor's Service Division,
WARNIN
: Sraiic discharges can desrroy expensive componenrs Discharge any siaiic eleciriciry your body may have
accumulared by grounding yourselfto ihe ground buss in rhe unit (heavy gauge black wires connecr io ihis buss).
IMPORTANT: Turn ihe uml OFF during disassembly and pari replacemeni, Recheck all work before you apply power to die unn.
I CONTENTS
TO SERVICE PERSONNEL 2 SELF-DIAGNOSTIC FUNCTION]
IMPEDANCE SELECTOR .3 @477 (EEEaflfifififi) -
FRONT PANEL . .3 IC DATA
REAR PANELS . 4-6 BLOCK DIAGRAM
OOLS'V
REMOTE CONTROL PANEL 7
SPECIFICATIONS/astmi 7-8
INTERNAL VIEW
SERVICE PRECAUTIONS / fi-EXEUJSIEEIE .
DISASSEMBLY PROCEDURES / fihflillLE 10-16
AMP ADJUSTMENT / 7>7E|Elilg 17-18
CwV-EX7ZJ71I/Ila 137-7zafimfiimilfififi I/TuiTr
This Service Manual uses IecycIed paper.
Copyllgm © 2005 VAMAHA CORPORATION All nghrs reserved.
Thls manual is copyrighted by YAMAHA and may not be copled Or
redistributed euher m mm! or elecrronically wllhoul permission,
PRINTED CIRCUIT BOARDS 30-43
PIN CONNECTION DIAGRAMS
SCHEMATIC DIAGRAMS
REPLACEMENT PARTS LIST .
REMOTE CONTROL
fiYAMAHA
YAMAHA CORPORATION
P.O.Box 1, Hamamatsu, Japan
animate '08. 10
Page 2
A-SYOO
A-S700
I TO SERVICE PERSONNEL
.Critical Components lntormatlon
Components having special characteristics are marked A and
must be replaced with parts having specifications equal to those
originally installed.
2. Leakage Current Measurement (For 120V Models Only)
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated
from supply circuits.
0 Meter impedance should be equivalent to 1500 ohms shunted
by 0.15 uF.
CAUTION"
AC LEAKAGE
WALL EQUIPMENT TESTER OR
OUTLET UNDER TEST EQUIVALENT
@ID-
J:
INSULATING
TABLE
- Leakage current must not exceed 0.5mA.
0 Be sure to test for leakage with the AC plug in both polariA
ties.
.39 F251, F252: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 8A,
7L" 125v FUSE."
CAUTION
F251, F252: REPLACE WITH SAME TYPE 8A, 125V FUSE.
ATTENTION
F251, F252: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 8A, 125V.
WARNING: CHEMICAL CONTENT NOTICE!
This product contains chemicals known to the State of California to cause cancer, or birth defects or other reproductive
harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON
WHATSOEVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or
expose eyes to solder/flux vapor!
It you come in contact with solder or components located inside the enclosure of this product, wash your hands before
handling food.
About lead free solder / fifial \DfiIZ'DLVZ
All of the P.C.B.s installed in this unit and solder joints are
soldered using the lead free solder.
Among some types of lead free solder currently available,
it is recommended to use one of the following types for
the repair work.
0 Sn + Ag + Cu (tin + silver + copper)
0 Sn + Cu (tin + copper)
0 Sn + Zn + Bi (tin + ZlnC + bismuth)
Caution:
As the melting point temperature of the lead free solder
is about 30°C to 40°C (50°F to 70°F) higher than that of
the lead solder, be sure to use a soldering iron suitable
to each solder.
$I§J-IZ%§E$7{ITL§ TNCQEWE cIZU/ \/ @HHI:
iotéfiafilififia/ \y 917v \y Stlnlfirhfmim
fifié/ \VfIZIiL < ObIDTEiEbE U $3551 lléifififil:
liFEEUDo'C 5 KIfifi/EI/ V/ SfUJEIfiEIEiE; Lia:
- Sn+Ag+Cu (3% + E + $131)
- Sn+Cu (55+3fl)
- Sn+Zn+Bi ($55 + @343 + 61770
32" '
man/aomtfi ElifiemaAU/vstlztto 30~
40 DCTEEIE] < Ev-Cvifia)? %n%h®/\/@I ILIIJ 3
tn)?é?&é@fl<fiav
Page 2
A-SYOO
A-S700
I TO SERVICE PERSONNEL
.Critical Components lntormatlon
Components having special characteristics are marked A and
must be replaced with parts having specifications equal to those
originally installed.
2. Leakage Current Measurement (For 120V Models Only)
When service has been completed, it is imperative to verify
that all exposed conductive surfaces are properly insulated
from supply circuits.
0 Meter impedance should be equivalent to 1500 ohms shunted
by 0.15 uF.
CAUTION"
AC LEAKAGE
WALL EQUIPMENT TESTER OR
OUTLET UNDER TEST EQUIVALENT
@ID-
J:
INSULATING
TABLE
- Leakage current must not exceed 0.5mA.
0 Be sure to test for leakage with the AC plug in both polariA
ties.
.39 F251, F252: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 8A,
7L" 125v FUSE."
CAUTION
F251, F252: REPLACE WITH SAME TYPE 8A, 125V FUSE.
ATTENTION
F251, F252: UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 8A, 125V.
WARNING: CHEMICAL CONTENT NOTICE!
This product contains chemicals known to the State of California to cause cancer, or birth defects or other reproductive
harm.
DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON
WHATSOEVER!
Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or
expose eyes to solder/flux vapor!
It you come in contact with solder or components located inside the enclosure of this product, wash your hands before
handling food.
About lead free solder / fifial \DfiIZ'DLVZ
All of the P.C.B.s installed in this unit and solder joints are
soldered using the lead free solder.
Among some types of lead free solder currently available,
it is recommended to use one of the following types for
the repair work.
0 Sn + Ag + Cu (tin + silver + copper)
0 Sn + Cu (tin + copper)
0 Sn + Zn + Bi (tin + ZlnC + bismuth)
Caution:
As the melting point temperature of the lead free solder
is about 30°C to 40°C (50°F to 70°F) higher than that of
the lead solder, be sure to use a soldering iron suitable
to each solder.
$I§J-IZ%§E$7{ITL§ TNCQEWE cIZU/ \/ @HHI:
iotéfiafilififia/ \y 917v \y Stlnlfirhfmim
fifié/ \VfIZIiL < ObIDTEiEbE U $3551 lléifififil:
liFEEUDo'C 5 KIfifi/EI/ V/ SfUJEIfiEIEiE; Lia:
- Sn+Ag+Cu (3% + E + $131)
- Sn+Cu (55+3fl)
- Sn+Zn+Bi ($55 + @343 + 61770
32" '
man/aomtfi ElifiemaAU/vstlztto 30~
40 DCTEEIE] < Ev-Cvifia)? %n%h®/\/@I ILIIJ 3
tn)?é?&é@fl<fiav