Fisher CA 335 Service Manual

Page 1

SERVICE MANUAL

INTEGRATED
STEREO AMPLIFIER

FISHER

CA-335

(EUROPE)

132 327 40
SPECIFICATIONS

POWER AMPLIFIER SECTION Graphic Equalizer
Minimum RMS sine wave power per channei 63 Hz :10 (18
within stated bandwidth at no more than stated 250 Hz :10 dB
distortion and with 8-ohm load 35 Watts 1 kHz :10 dB
Power Bandwidth 20 Hz - 20 kHz 4 kHz :L-10 dB
Total Harmonic Distortion 0.5 /0 16 kHz :10 dB
I.M. Distortion 0.5 % Hum and Noise (iHF Short Circuit, A Network)
Speaker Damping >20 Phono 68 dB
PREAMPLIFIER SECTION Deck/Video/Surround 85 dB
Frequency Response Tuner / CD 85 dB

Phono (RIAA) :1 (18 GENERAL

Aux (20 Hz ~ 20 kHz) :1 dB Power Requirements AC 220 V
input Sensitivity and impedance (50 Hz) 185 Watts

Phono 2.5 mV/SO k0 AC Outlet 1

Deck/Video/Surround 150 mV/EO kt) Dimensions (W x H x D) 400 x 91 x 202 mm

Tuner/CD 150 mV/50 k9 Weight (approx.) 4.4 kg
Phono Max. Input Capability 150 mV

- Specifications and design are subject to change without notice.-

A47500

REFERENCE No. WM-21128

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FUNCTIONAL BLOCK DIAGRAM

GRAPHIC Eu . VDLUME
ED . AMP :

Mono 0
TUNER I-GRAPHIE EGIAMP
0-. POWER AMP
cu 0-. BALANCE Lamas
runcrxun W-O SPEAKER
DECK E93227 m 737 5dr: IdB OUTPUT
[RID 0-.
we ELECTRIC VOLUME
[W0 O->
P/ B O---o
VIDEO/SURROUND G) e
PHONU
733E?
FUNCTIEIN
amen MANUAL
SYSTEM coNTRoI. I
DECK TlNER -
vmzo/suRRounu RELAY
- voLLIME UP -Kl-
REMOTE CDNTRUL -
TRANSMITER II: VOLUME DOWN POWER TRANS
- (MAIN)
MANUAL
MPDGIZEG .LC6522H CZISWITCH
inER
- REMDTE
fi comm. I 1 snITcn
PRE AW II:

pRCIonA
POWER MUTING AC
VOL "5: STANDBY POWER SUPPLY ---O
galED/SURRDUID , >
We: W./Lw FM ROVER TRANS

(SUB)

POWER AMPLIFIER ADJUSTMENT

BEFORE ADJUSTMENT
Unplug the AC power cord and set the front panel controls as follows:
0 Power Switch to OFF position.

0 Set the volume level to minimum level by Pressing the VOLUME DOWN button.

0 IDLING CURRENT ADJUSTMENT VR101/VR102 (on the Main P.C.Board) setting to mechanical center
position.

0 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 2 minutes
before attempting this alignment.

LEFI' AMPLIFIER RIGHT AMPLIFIER

1) Connect the DC Voltmeter between Pins TP1 and TP2 1) Connect the DC Voltmeter between Pins TP3 and TP4~

on the Main P.C.Board. on the Main P.C.Board.

2) Adjust the VR101 for an indication of 3mV i 0.5mV on 2) Adjust the VR102 for an indication of 3mV i0.5mV on

the DC Voltmeter. the DC Voltmeter.