Fisher CA-271 User manual

SERVICE
MANUAL
71
CA-1271
Integrated
Stereo
Amplifier
(EUROPE)
CA-271
132 287 40
CA-1271
132 287 44

CONTENTS
Functional Block Diagram ...........-.. 5s ceeec eee e eee eee nee eee e ete tent e etn enes 2
Specifications
.cestcc
snes
ed
cece
artad
ee
valerate
dere
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Bate
as
3
Cabinet
&
Chassis
Exploded
View
.............ccce
eee
cece
eect
eee
n
ener
ee
en
rene
4,5
Parts
List
aici
heecsckaw
eas
Bese
eee
Rows
tesa
oh
ea
eke
ai
clea
eae
Rae
6
Recommended
Test
Equipments
.............
cece
cece
eet
e
tee
eee
teen
ent
n
ener
eenenens
7
Harmonic
Distortion
TeSt
...........
0.
ccc
cece
eee
ee
ee
eee
e
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e
nee
e
eee
ees
7
Power
Amplifier
Adjustment
...........
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c
cece
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e
tenet
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eee
eee
e
een
enes
8
Integrated
Circuit
Block
Diagram
...........
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e
ene
e
tenn
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tert
ene
8,9
P.C.B.Assy Parts List ............ cece ecccce eee n eee e eee e eee eene ee eeseeeenees 10,11,12,13,14
Printed
Circuit
Board
(Bottom
View)
............00ceccceeeeeeeeeeeeeeeees
'14,15,16,17,18
Point to Point Wiring Diagram ............ ccc cece cece e ete e eee e eee en tent eeeeenecees 19,20
Schematle
Diagram)
occcvcs
weeds
te
Sean
e
de
aste
bodys
ncouey
stan
Miduuaaio
te
Meavasianns
21,22
Semiconductor Lead Identification ............ cece cece e cece eee eee eee en eee neeeeeees 23
FUNCTIONAL
BLOCK
DIAGRAM
FUNCTION bd TAPE MONITOR
EQ Amp.
V
1.C 4066 B
63Hz 1kHZ = 16kHz
,
250Hz
4kHz
LC
7815
H
;
AUX/VIDEO
Tape
REC OUT
Main Amp. Speakers SW.
e
oh a as Gino ‘“: Speakers System
Speakers A
Speakers B
Headphone
Loudness
Meter Drive Amp Bewoe Deval
i M7:
| soeccecg
RGoocagacao
L.E.D. Meter

SPECIFICATIONS
POWER AMPLIFIER SECTION
Minimum RMS sine wave power per channe!
within
stated
bandwidth
at
no
more
than
stated
distortion and with 8-ohm load
Power Bandwidth
100 Watts
20 Hz — 20 kHz
Total
Harmonic
Distortion
0.05
%
I.M.
Distortion
0.05
%
Speaker
Damping
[—
>20
{—
t—
PREAMPLIFIER SECTION
Frequency Response
Phono
(RIAA)
+1
dB
Aux
(20
Hz
—
20
kHz)
+1
dB
Input
Sensitivity.and
Impedance
T
;
2.5
mV/50
‘
*
Phono
|
5
mV/50
kN
Tape
Monitor
L
150
mV/50
kn
Tuner/Auxiliary
150 mV/50 ko
Phono Max. Input Capability
Phono
125 mV
Graphic Equalizer
63 Hz
+10 dB
250 Hz
1 kHz
4 kHz
16 kHz
Loudness Contour (100 Hz/10 kHz)
Hum
&
Noise
(IHF
Short
Circuit,
A
Network)
Phono
Tape Monitor
+10 dB
+10 dB
+10dB
+10 dB
+8 dB/+4 dB
70 dB
90 dB
Tuner/Auxiliary
90 dB
GENERAL
Power Requirements (50 Hz)
110/220 VAC
Power
Consumption
480
Watts
Dimensions
(W
x
D
x
H)
440
x
270x110mm
Weight
(approx.)
8.4
kg
Because
its
products
are
subject
to
continuous
improvement,
Fisher
Corporation
reserves
the
right
to
modify
product
designs
and
specifications
without
notice
and
without
incurring
any
obligation.

CABINET & CHASSIS EXPLODED VIEW (1)
o~

CABINET
&
CHASSIS
EXPLODED
VIEW
(2)
Sit oe anes
; Se
elt | Cxg

PARTS LIST
ack Part No. Description
PACKING PARTS LIST
3-9415-10300 Bag Polyethylene
131-6-2119-02090 Bag Polyethylene-Exp.
131-6-3069-16350 Patching Sheet
131 -6-9459-00300 Rubber Band
141-6-1139-86226 Outer Cor Carton (CA-271)
141-6-1139-86230 Outer Cor Carton (CA-1271)
141-6-1469-00400 Pad Top
141-6-1469-04000 Case Styrofoam (Left)
141-6-1469-04001 Case Styrofoam (Right)
ACCESSORIES PARTS LIST
131-6-2719-10801 Bag Fan
131-6-4519-15700 Guarantee Certificate
131-6-4559-11200 Serial No. Sheet
142-6-4119-32453 Explanatory Booklet (CA-271)
142-6-4119-32501 Explanatory Booklet (CA-1271)
CABINET & CHASSIS PARTS LIST
4-2379-21520 Terminal Lug
141-6-4559-03300 Serial No. Sheet
131-2-7103-26100 Label
131-6-4559-10900 Manufacturing No.
CAI 131-2-1410-33100 Cover
CAT-1 — 131-2-3202-13400 Meta! Reinf
CA2 141-2-4219-38400 Screw, Bind Hd. Tapping-B Sems +M4.0x8
CA3 131-2-5205-33300 Cushion
CA4 131-2-1601-69601 Knob (Speaker Selector)
CA5 141-2-2149-24300 Panel Front
CAG 4-6129-70660 Lamp
CA7 131-2-3310-18000 Metal Mount Lamp
CA8 131-2-1601-91600 Knob Power
CAQ 131-2-5205-33500 Cushion
CA10 131-2-1601-91701 Knob Push
CAI1 141-0-3519-24400 Mount P.C.B. Assy
| 141-2-3519-74300 Mount P.C.E.
141-2-1449-65100 Screen LED
CA12 131-2-1601-91900 Knob Volume
CA13 131-2-1601-92000 Knob Balance
CA14 131-2-3608-16400 — Filter
CA15 131-2-4221-00600 Rivet
CA16 131-0-1016-44400 Panel Decorate Assy (CA-271)
CA16 131-0-1016-44402 Panel Decorate Assy (CA-1271)
131-2-1205-28800 Decorate Plate Dial
131 -2-1601-91800 Knob Function
141-2-1129-15200 Cabinet Front
141-2-1449-61207 Plate Front (CA-271)
141-2-1449-61217 Plate Front (CA-1271)
141-2-1449-65000 Plate Decorate
141-2-2899-43500 Adhesive Film
141-2-2899-43600 Adhesive Film
CAI7 141-2-1659-35900 Knob Stide
CA18 141-2-3119-25400 Chassis
CAI 131-0-3016-10400 Cramp Wire Assy
CA20 131-2-1801-14100 Leg
CA21 141-2-1259-08100 Plate Bottom
CA22 131-2-4203-84200 Washer, 4.2x12x1.0Z
CA23 131-2-3101-99900 Metal Mount Trans
CA24 ZN 4-2512-23021 Power Trans
CA25 131-2-4201-25201 Screw, Brazier Hd. Tapping-8. Seras +-M3.0x8
CA26 4-2039-71961 Transistor, 2SA 1302 [01 15, 0215, 0505}
or
4-2039-72121
Transistor. 2SA 1301 [Q115, 0215, 0505)
Q’ty
ner
Part
No.
Description
Q'ty
CA27
4-2039-71971
Transistor,
2SC
3281
[0114,
0214,
0506]
3
1
or
4-2039-72111
Transistor,
2SC
3280
[Q114,
0214,
0506]
:
1 CA28 141-2-3129-05800 Sub Chassis
1 CA29 141-2-3689-14300 Plate Heat Sink
1 CA30 131-2-4201-17800 Screw Ground
1 CA31 141-2-1219-34800 Panel Rear (CA-271)
1 CA31 141-2-1219-34802 Panel Rear (CA-1271)
1 CA32 131-2-5205-15800 Cushion
1 CA33 141-2-3159-03300 Braket Cover
j CA34 131-2-6111-14200 Bushing (Power Cord)
CA35 = A. 4-2432-00200 Power Cord
CA36 = A\.4-2312-01020 Switch Slide (AC Selector) [SW411]
CA37 ~—s-_- A. 4-2359-74032 —2P Socket With/Nut 2
1 CA38 131-2-7104-00500 Plate Pad Switch .
1
1
1 P.C.B. ASSY PARTS LIST:2:
1 PCB1 141-0-1939-09162 Main P.C.B. Assy
PCB2 141-0-1939-09131 Input P.C.B. Assy
PCB3 141-0-1939-09140 Function P.C.B. Assy
PCB4 141-0-1939-09150 Graphic Equalizer P.C.B. Assy
PCB5 141-0-1939-09172 Speaker Terminal P.C.B. Assy
PCB6
141-0-1939-09180
Transistor
P.C.B.
Assy
Z
PCB7 141-0-1939-09192 Switch P.C.B. Assy
SCREW PARTS LIST
Cx 101-3-1302-00311 Screw, Pan Hd. +M2.0x3 ‘
CX2 101-3-1303-00611 Screw, Pan Hd. +M3.0x6 =
Cx3 143-3-1302-60611 Screw, Pan Hd. Tapping-B, +M2.6x6 :
Cx4
143-3-1704-00811
Screw,
Bind
Hd.
Tapping-B,
+M4.0x8
“
CX5 143-3-1902-60611 Screw, Brazier Hd. Tapping-B, +M2.6x6 :
CX6 143-3-1903-00611 Screw, Brazier Hd. Tapping-B, +M3.0xé £
CX7
143-3-1903-00618
Screw,
Brazier
Hd.
Tapping-B,
+M3.0x6
:
CX8
143-3-1903-00818
Screw,
Brazier
Hd.
Tapping-B,
+M3.0x8
:
CX9
143-3-1903-01011
Screw,
Brazier
Hd.
Tapping-B,
+M3.Cx1>
5
CX10
143-3-1203-00611
Screw,
Flat
Hd.
Tapping-B,
+M3.0x6
2
oX11
101-3-1302-60618
Screw,
Pan
Hd..
+M2.6x6
:
CX12
101-3-1303-00618
Screw,
Pan
Hd.,
+M3.0x6
2
NOTES:
1. Parts order must contain Mode! Number, Part Nu~z2° 2-2
Description.
[SO OC cop a SES SO SG 5 GT 0 ee ne Ce ae eC, Se re OO ae Ce CA UY GC
2. Ordering quantity of screws and resistors must be ~
10 pcs.
PRODUCT SAFETY NOTICE
Each precaution in this manual should be ‘
during servicing. Components identified with -
symbol A\ in the parts list and the schematic =< aS
designate components in which safety can be of sz=7 =
significance. When replacing a component nee
with A\, use only the replacement parts desig72:+2 :°
parts with the same ratings of resistance. wa7:
voltage that are designated in the parts list in th s ~27> 2
Leakage-current or resistance measurements ~_:° =4
7 Oo
im)
9
insulated from the supply circuit before retus- -2 °7=
product to the customer.

RECOMMENDED TEST EQUIPMENTS
The following test equipments are recommended to completely test and align the Amplifier:
Line Voltage Isolation Transformer
AC DC Multimeter
Accurately Calibrated AC Voltmeter
Oscilloscope (Flat to 100 kHz Minimum)
e Low-Distortion Audio Sine-Wave Generator
e Harmonic Distortion Analyzer
¢ Two (2) Load Resistors 8-ohms, 250 Watts
(Minimum Rating)
ee HARMONIC DISTORTION TEST
CAUTION: Limit the following tests to no more than ten
minutes each. Use 8-ohm resistors, with a minimum
power rating of 250 watts when connecting a load across
the SPEAKERS terminal.
CONTROL SETTINGS:
Unplug the AC power cord and set the front panel
controls as follows:
e GRAPHIC EQUALIZER to center position.
e BALANCE control to center position.
e POWER switch to OFF
e SPEAKERS switch to OFF
e FUNCTION switch to AUX/VIDEO
e LOUDNESS switch to OFF
e VOLUME control to MINIMUM position
e LEFT CHANNEL DRIVEN
ONE CHANNEL DRIVEN:
1) Connect a low distortion audio generator to L==~
AUX IN jack. Set generator frequency to 1 kHz 472
output to minimum.
2) Connect an 8-ohm load resistor between SPE4“ -
ERS SYSTEM-A LEFT and COM terminals. Cor’ 472:
a Harmonic Distortion Analyzer and an AC VT /‘" -
parallel across the 8-ohm load.
3) Connect the AC power cord and set SPEA“*=
switch to ON position. Turn VOLUME con?7~
MAX.
ay Of)
4) Increase generator output for 100 Watts RMS 72
volts across the 8-ohm load). Harmonic Dist~’ <7
Analyzer should measure 0.05 % distortion or “~~
5) Repeat steps 1 through 4 for RIGHT CHANNEL
BOTH CHANNELS DRIVEN
Connect 8-ohm load resistors across LEFT and RIGHT SPEAKERS SYSTEM-A terminals. Adjus‘
generator output and “VCLUME” control for 100 watts at Left and Right Channels (28.2 volts across
the 8-ohm loads). Harmonic Distortion Analyzer should measure 0.05 % distortion or less at each
Channel.
CAUTION . This precision high-fidelity instrument should be serviced only by qualified
* personnel, trained in the repair of transistor equipment and printed circuitry.

POWER AMPLIFIER ADJUSTMENT
BEFORE ADJUSTMENT
Unplug the AC power cord and set the front panel controls as follows:
Power switch to the OFF position.
Set the SPEAKERS switch to the OFF position.
Turn the MASTER VOLUME control to the position marked 0 (minimum).
IDLING CURRENT ADJUSTMENT VR101/VR201 (on the Main P.C.Board) setting to mechanical
center position.
Connect the AC power cord and Power switch to the ON position.
IDLING CURRENT ADJUSTMENT
This adjustment is very sensitive to changes in ambient temperature. Allow set to operate for 5 mi-
nutes before attempting this adjustment.
*. EFT AMPLIFIER RIGHT AMPLIFIER
Connect the DC VTVM between Pins No.21 and 1) Connect the DC VTVM between Pins No.23 and
No.22 on the Main P.C.Board. No.24 on the Main P.C.Board.
Adjust the VR101 for an indication of 7mV on the 2) Adjust the VR201 for an indication of 7mV on the
DC VTVM. DC VTVM.
INTEGRATED CIRCUIT BLOCK DIAGRAM
FUNCTION ANALOG SWITCH IC LC 7815H
COM2 A2_ 82 C2 D2 TMout TMCTL Aout Bout Cout DouT MUTE
MUTING
CONTROL
TIMER
CIRCUIT
fe pe
RR AAR
; O O O O
COM1 Ai 81 C1 D1 TMIN AIN BIN. CIN DIN RESET MUTEIN CR
—~8-

INTEGRATED
CIRCUIT
BLOCK
DIAGRAM
continued)
TAPE
INPUT
ANALOG
SWITCH
IC
LC
4066
B
sw. D SW. C
CONT CONT ff 1 f 1
Vpp A B IN/OUT OUT/IN OUT/IN IN/OUT
Vec Vout! VINI- = -VINI + VEE Vin2+ ViN2— our Vec
LED METER DRIVE AMP IC IR 2E19
Vcc VreG OUT? OUTS OUTS OUTs OUTS OUTz OUT! =IRA IRB
10 4004 2 3 4 5 6 7 16 615
Constant
Current $

P.C.BOARD PARTS LIST
Ref.
= Part No. Description Q’ty No.
MAIN P.C.B. ASSY C311
POBI 141-0-1939-09162 Main P.C.B. Assy 1 C312
4-2262-22070 Main P.C.B. 1 C313
4-2329-70330 Relay { C314
AM 4-2342-00340 Fuse F5.0A 2 C315
AN 4-2349-20580 Fuse T3.15A 2 C316
AN 4-2349-21570 Fuse T6.3A 2 C317
4-2352-00200 Fuse Holder 12 C318
!101 4-2552-00650 AF Coil 1 C328
201 4-2552-00650 AF Coil 1 C408
¥R101 4-2222-01450 Potentiometer B-2002 1 C503
YR201 4-2222-01450 Potentiometer B-2000 1 C504
a 4-2369-73130 Connector 3P 1 C505
is 4-2369-73410 Connector 7P 1 C506
111-2-6220-11100 Wire Wrap Terminal 15
131-2-6201-29800 Heat Sink (For Q301,0302) 2
131-2-7103-50801 Label Fuse 1 Di01
; 0102
CAPACITORS 0201
"140 CD4-7-5250-0001V Electrolytic 4.7uF 25V 1 0202
141 CC2-2-1500-KE00R Ceramic 220pF 50V +10% 1 D301
"142 CC1-0-1500-KDO0C Ceramic 100pF 50V +10% 1 0302
143 CC1-0-1500-KD00C Ceramic 100pF 50V +10% 1 0303
144
CC8-0-A500-DDO0C
Ceramic
8pF
~=50V
+0.5%
1
0304
.'45 CC8-0-A500-DD00C Ceramic 8pF §=—50V +0.5% 1 0305
‘46 CC2-2-1500-KEOOR Ceramic 220pF = 50V £10% 1 0306
147, CM1-0-4500-JOOTV = Mylar OtuF 50V +5% 1 0307
"148 = CD4-7-6101-0001V Electrolytic 474F 100V 1 D308
2149 4-2239-71190 Capacitor 27pF 500V +10% 1 0309
2450 4-2239-72020 Ceramic 3pF 500V +0.5pF 1 0310
“51 CD2-2-763A-0001V Electrolytic 220KF 6.3V { 0313
C52 4-2239-72120 Ceramic 220pF S500V +10% ] or
"153 CD1-0-5500-0001V Electrolytic 1uF 50V 1 0410
C154 4-2239-71120 Capacitor 18pF 500V +10% 1 D411
155 4-2239-72120 Ceramic 220pF 500V +10% 1 or
C156 CD4-7-6101-0001V Electrolytic 47uF 100V 1 0501
C157 ~~ CM3-9-3500-KO0SV = Mylar 0.039uF S50V +10% 1 0502
240 CD4-7-5250-0001V Electrolytic 474F 25V 1 0503
£241 CC2-2-1500-KEOOR Ceramic 220pF ~ =50V +10% 1 0504
242 CC1-0-1500-KDO0C Ceramic 100pF = =50V +10% 1 0505
0243 CC1-0-1500-KDO0C Ceramic 100pF 50V +10% 1 0506
0244 CC8-0-A500-DD00C Ceramic 8pF SOV +0.5% 1 Q106
6245 CC8-0-A500-DD00C Ceramic 8pF 50V +0.5% 1 or
C246 CC2-2-1500-KEQOR Ceramic 220pF = SOV. + 10% 1 Q107
C247 = CM1-0-4500-JOOTV Mylar O1uF 50V +5% 1 Q108
C248 CD4-7-6101-0001V — Electrolytic 47uF 100V 1 Q109
C249 4-2239-71190 Capacitor 27pF S500V +10% 1 Q110
C250 4-2239-72020 Ceramic SpF SO0V +0.5pF 1 Q111
C251 CD2-2-763A-0001V Electrolytic 220KF =6.3V 1 or
C252 4-2239-72120 Ceramic 220pF 500V +10% 1 Q112
C253 = CD1-0-5500-0001V Electrolytic 1uF SOV 1 or
C254 4-2239-71120 Capacitor 18pF 500V +10% 1 0206
C255 4-2239-72120 Ceramic 220pF 500V +10% 1 or
C256 CD4-7-6101-0001V Electrolytic 47uF 100V 1 Q207
257 = CM3-9-3500-KOOSV Mylar 0.039uF S50V +10% 1 0208
C302 = CC 4-7-3151-ZG00C Ceramic 0.047uF 150V +80.-20% 1 Q209
C303 CC4-7-3151-ZG00C Ceramic 0.047uF 150V +80,-20% 1 0210
0304 CC4-7-3151-ZG00C Ceramic 0.0474F 150V +80.-20% 1 0211
C305 CC4-7-3151-ZGO0C Ceramic 0.047uF 150V +80.-20% 1 or
C306 4-2239-72180 Electrolytic 6800uF 72V +20% 1 0212
C307 4-2239-72180 Electrolytic 6800uF 72V +20% 1 0301
C308 CD1-0-6250-0001V Electrolytic 10uF 25V 1 Q302
C309 CC4-7-3151-ZG00C Ceramic 0.0474F 150V +80..20% 1 0401
C310 = €C4-7-3151-ZGO0C Ceramic 0.04745 150V +80.-20% 1 or
Part No.
CC4-7-3151-ZG00C
CC4-7-3151-ZG00C
4-2239-72190
4-2239-72190
CD1-0-7250-0001V
CD1-0-7250-0001V
CD1-0-6250-0001V
CD1-0-6250-0001V
CD2-2-5500-0001V
CD2-2-763A-0001V
CC1-2-1500-JDOOR
CC1-2-1500-JDOOR
CC2-2-1500-KDO0C
CC2-2-1500-KD00C
Description
Ceramic 0.
Ceramic 0.
Electrolytic 4
Electrolytic 4
Electrolytic
Electrolytic
Electrolytic
Electrolytic
Electrolytic
Electrolytic
Ceramic
Ceramic
Ceramic
Ceramic
SEMICONDUCTORS
205-5-9040-44210
205-5-9040-44210
205-5-9040-44210
205-5-9040-44210
212-5-5990-03020
212-5-5990-03010
202-5-3210-18011
4-2029-73840
4-2029-73840
4-2029-73840
4-2029-73840
202-5-3210-18011
202-5-3210-18011
202-5-3210-05112
202-5-0220-01010
4-2029-73870
205-5-9040-44210
202-5-0220-01010
4-2029-73870
202-5-9600-44610
202-5-9600-44610
202-5-9600-44610
202-5-9600-44610
4-2029-73840
4-2029-73840
203-5-4921 -01270
203-5-4570-73470
203-5-5393-06560
203-5-5613-06470
203-5-6931 -20985
203-5-5632-91185
203-5-51 43-11782
203-5-81 22-34450
203-5-4711 -24982
203-5-8631 -01150
203-5-4921 -01270
203-5-4570-73470
203-5-5393-06560
203-5-5613-06470
203-5-6931 -20985
203-5-5632-91185
203-5-5143-11782
203-5-81 22-34450
203-5-4711-24982
203-5-7330-61 261
203-5-7320-63261
203-5-7230-60870
4-2039-72212
Diode, DS 442.
Diode, DS 442
Diode, DS 442
Diode, DS 442
Stack Diode, 30 DC 1S
047F
047uF
700KF
7004F
100.F
100uF
10uF
104F
2.2HF
220uF
120pF
120pF
220pF
220pF
Stack Diode, 30 DC 1RS
Zener Diode, GZA 18 X
Diode, 30D 2
Diode, 30D 2
Diode, 30D 2
Diode, 30D 2
Zener Diode, GZA 18 X
Zener Diode, GZA 18 X
Zener Diode, GZA 5.1 Y
Diode, DSF 10 C
Diode, 11€ 2
Diode, DS 442
Diode, OSF 10 C
Diode, 11E 2
Diode, DS 446
Diode, DS 446
Diode, DS 446
Diode, DS 446
Diode, 30D 2
Diode, 30D 2
Transistor, 2SD 1012
Transistor, 25D 734
Transistor, 2SC 3065
Transistor, 2SC 3064
Transistor, 2SA 1209
Transistor, 2SC 2911
Transistor, 2SC 3117
Transistor, 2SC 2344
Transistor, 2SA 1249
Transistor, 2SA 1011
Transistor, 2SD 1012
Transistor, 2SD 734
Transistor, 2SC 3065
Transistor, 2SC 3064
Transistor, 2SA 1209
Transistor, 2SC 2911
Transistor, 2SC 3117
Transistor, 2SC 2344
Transistor, 2SA 1249
Transistor, 2SD 612
Transistor, 2SB 632
Transistor, 2SA 608
Transistor, 2SA 1115
150V
150V
40V
40V
25V
25V
25V
25V
50V
6.3V
50V
50V
50V
50V
+80,-20°:
+80,-20°
+ 20%
+ 20%
+5%
+5%
+10%
+10%
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