Fisher CA 270 Service Manual

Page 1

SERVICE MANUAL

132 287 41

Page 2

CONTENTS

Functional Block Diagram .............................................................. 2
Specifications .................

Cabinet & Chassis Exploded View I

Parts List ...................................

Recommended Test Equipments ....................................................... 7
Harmonic Distortion Test ................................................................. 7
Power Amplifier Adjustment .............................................................. 8
integrated Circuit Block Diagram ....................................................... 8,9
P.C_B.Assy Parts List 10.1 1,12.13,14
PrintedCircuitBoard (Bottom View) 14,15,16,17,18
Point to Point Wiring Diagram ...........................

Schematic Diagram .....................................

Semiconductor Lead Identification ..................................................... 23

FUNCTIONAL BLOCK DIAGRAM

FUNCTION TAPE MONITOR
E0 Am
Input 9

a
I

Tone C:"1roi

399359.115} 57mm steer

*4" Soeakers :«

.

Page 14

2:." Part No. Description Oty
CAPACITOR
0301 A 4-2239-70970 Capamlor 0.0qu 400V new 1
RESISTOHS PRODUCT SAFETY NOTICE
R175 RH5A61202-JZOOO Metal 560$) 2W 15% 1
R176 RDZ-2-1251-JM000 Carbon 220;: MW 25% 1 Each precaution in this manual should be followed
R177 R02.7.1251.Jmooo Carbon 270 MW 15% 1 during servicing. Components identified with the IEC
R275 HHS-6420242000 Metal 5501) 2w 15% 1 symbol A in the parts list and the schematic diagram
[.1275 02.2.1251 >JM000 Carbon 2201) 114w 15% 1 designate components in which safety can be of special
54277 02.742514MQoo Cam 27011 um 455% 1 significance. When replacing a component identified
with A, use only the replacement parts designated, or
pads with the same ratings of resistance, wattage or
NOTES- voltage that are designated in the parts list in this manual,
1 P ti d . Leakage-current or resistance measurements must be
, ars _or' er must contain Model Number, Part Number and made 0 determine that exposed parts are acceptably
Descrfphon' I , . insulated from the supply circuit before returning the
2, :Dédglsng quantlty of screws and resrstors must be multiple of product to the customer.

SWITCH P.C.BOARD

(BOTTOM VIEW)

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, E _ L__.I___._.I..__I
3Q 5Q FuszTioAxa
rfiT-_fr'fi
6 Q * _I....>.I....._J+_.a
_I
t©
'-H-*C30l I
in"? i
| \ l |
l \ l I
l - l l
| l .I r-
| l H -
| | 'l l.
I I ~\--II,-
l I H
r:::rI-1-1:|_ ___ _ _ll '
| | ___i__l T T |
t__l L_J L_J :
swaoe sw409 SW4lO l
POWER SPEAKER SPEAKERL-g-
sw A SW, 8 sw. r
ON ON ON L___~J
HEADPHONES
OFF OFF OFF JACK

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