Fisher CA 9040 Service Manual
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Extracted text from Fisher CA 9040 Service Manual (Ocr-read)
Page 1
SERVICE MANUAL
FISH-00733
FISHER
AMPLIFIER WITH RCA-9040 _ CA_904O
I WIRELESS REMOTE CONTROL
( EUROPE )
132 353 41
SPECIFICATIONS
RCA-9040 Phone Maxlmum Input Capability ................... 160 mV
Wireless Remote Control . I 49 Functions Tone Control
rowan AMPLIFIER SECTION Egg Bass
Minimum RMS sine wave power per channel Middle"
within the stated bandwidth at no more than the stated Treble
distortion and with an 84mm load ........ DIN 80 Watts Super Trebl e
Ifigfhgfrfllmffisiaxsn 4° 2 1350?? Loudness Contour (100 Hz/Io kHz) + a dBl+4 dB
. . ' 0° Hum and Noise (IHF Short Circuit, A N rk)
I.M. Distortion 0.05 A Phone 70 dB
Speaker Damping ' > 30 Tape Monitor 1,2 90 dB
PREAMPLIFIER SECTION Tuner/AUXICD 90 dB
Frequency Response Source Direct (AUX) . .. 95 dB
inanagnlélfl 2 ' :1 S: 35353;: uirements AC 220 V
Input Sensitivity and Impedance q ...............................................
(50 Hz) 400 W
Phono ............... 2.5 mV/50 kn A
. AC Outlets (Swnched) 2
Tape Monitor 1,2 , 150 mV/50 kg Dimensions (WxHxD) 335,,
Tuner/AUX/CD .. . 15D mV/50 kn '
Weight (Approximate)
- Specifications and design are subject to change without notice. -
REFERENCE No. WM-570559
Page 2
POWER AMPLIFIER ADJUSTMENT - ,
BEFORE ADJUSTMENT V
Unplug the AC power cord and set the front panel controls as follows:
0 Power switch to OFF position. .
Set the SPEAKERS switch to the OFF position.
Turn the MASTER VOLUME Control to minimum.
IDLING CURRENT ADJUSTMENT VR4U1NR402 (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 mlnutes before attempting this
alignment.
LEFT CHANNEL AMPLIFIER RIGHT CHANNEL AMPLIFIER
1. Connect the DC Voltmeter between Test Pins TP-2 and 1. Connect the DC Voltmeter between Test Pins TP-4 and
TP-1 on the Main P.C.Board. - TP-3 on the Main P.C.Board.
2. Adjust the VR401 for an indication of 5mV $0.5mv on the 2. Adjust the VR402 for an indication of 5mV i0.5mV on the
Dc Voltmeter. ' DC Voltrneter.
ADJUSTMENT POINTS
TP-z TF-t TF-4 TP-S
LEFT CHANNEL RIGHT CHANNEL