Fisher CA 9030 Service Manual

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SERVICE MANUAL

FISHER

INTEGRATED STEREO

AMPLlFlER A_9030
(EUROPE)
132 353 42

SPECIFICATIONS
POWER AMPLIFIER SECTION Tone Control
Minimum HMS sine wave power per Channel Super Bass . :10 dB
within the stated bandwidth at no more than the stated Bass 110 dB
distortion and with an 8-ohm load DIN 80 Watts Middle . :10 dB
Power Bandwidth .......... 40 Hz - 12.5 kHz Treble 1'10 dB
Total Harmonic Distortion . 0.05 % Super Tre e . .. 110 dB
LM. Distortion 005 % Loudness Contour (100 Hz/iO kHz) . +8 dB/+4 dB
Speaker Damping t . >30 Hum and Noise (iHF Short Circuit, A Network)
PREAMPLIFIER SECTION 13 70 d:
Frequency Response ape MonItor 1,2. .. 90d
Tuner/AUXICD ., 90 d8
Ph°n° (RAA) """"""" ' :1 B Source Direct (AUX) 95 dB
AUX (20 Hz - 20 kHz) 11 dB "
input Sensitivity and Impedance GENERAL
Phono ................ .. 25 mV/SO kn Power Requirements ............................................... AC 220 V
Tape Monitor 12 150 mV/50 k!) (50 Hz) 400 W
Tuner/AUX/CD 150 mV/SO k0 AC Outlets (Switched) . ............................. 2
Phono Maximum input Capability . ........... 160 mV Dimensions (WxHxD) 440 x 112 x 335 mm
Weight (Approximate) , ..................... 77 kg

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

REFERENCE No. WM-570567

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POWER AMPLIFIER ADJUSTMENT

BEFORE ADJUSTMENT .

Unplug the AC power cord and set the front panel controls as foilows:

0

Power switch to OFF position.

Set the SPEAKERS switch to the OFF position.

Turn the MASTER VOLUME Control to minimum.

IDLING CURRENT ADJUSTMENT VR401/VR402 (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 2 minutes before attempting this

alignment.

LEFT CHANNEL AMPLIFIER RIGHT CHANNEL AMPLIFIER

1. Connect the DC Voitmeter between Test Pins TP-2 and 1. Connect the DC Voitmeter between Test Pins TP-4 and
TP-1 on the Main P.C.Board. "(P-3 on the Main P.C.Board.

2. Adjust the VH401 for an indication of 5mV 10.5mV on the 2. Adjust the VR402 for an indication of 5mV i0.5mV on the
DC Voltmeter. DC Voitmeter.

ADJUSTMENT PBINTs
042 Q4I9 0422 @420
3 ® 3 9 C 3 ® C 3 ®

TP-2 TF-i TP-4 1'va
LEFT CHANNEL RIGHT CHANNEL