Fisher CA 876 Service Manual
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Extracted text from Fisher CA 876 Service Manual (Ocr-read)
Page 2
CABINET & CHASSIS EXPLODED VIEW
POWER AMPLIFIER ADJUSTMENT
BEFORE ADJUSTMENT
Unplug the AC power- cord and set the front panel contrds as fiaiiaws:
Power switch to OFF position.
Set theSPEAKERS switch to the OFF position.
Set the volume ievei to minimum level by Pressing the VOLUME DUWN button,
iDLiigiG CURRENT ADJUSTMENT VR501/VR502 (on the Main Ampfifier Home; setting to mechanical center
pOSI Ion.
Connect the AC power cord and Power Switch to the ON postman
vc
GE"
IDLING CURRENT ADJUSTMENT
This adjustment is very sensitive to changes in ambient: temneramre. Aim set: tn» operate for 2 minutes
before attempting this alignment.
LEFT AMPLIFIER RIGHTAMPLIHER
1) Connect the DC Voitmeter between Pins 19 and 21 on 1) Gamma DC Voitmeter between Pins 20 and 22 on
the Main Amplifier P.C.Board. the Main Ampiifier P.C.Board.
2) Adjust the VR501 for an indication of 9mV (7mV 2) Adjust the V8502 for an indication of 9mV (7mV
~ 1 5mV) on the DC Voltmeter. ~15mv) on the Dc Voitmeter.
-2...