Fisher 800 C Service Manual 30001 49999

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Extracted text from Fisher 800 C Service Manual 30001 49999 (Ocr-read)

Page 1

Serial Nos. 30001-49999

ervice Manual

I THE
FISHER

CHASSIS SERIAL NUMBERS

FROM 30001 to 49999 INCLUSIVE
AL Pugliese , I
The Fisher Doctor
' ' ,y - »' Fisher Radio Corporation
V FISﬁlﬁiEgRRAﬁDlO-CORPQRATIQN -- LQI Wehamsree

. » - . Staten Island , NY 10308
311? , .

Page 12

SERVICE NOTES

Receiver Phase Inverter Adjustment

The following procedure is used to balance the phase inverter tor mini-
mum IM distortion. Two Lohm, 30-watt resistors and an IM distortion
analyzer are required for this odiustment.

I - Connect one at the two l-ohm loads to the appropriate terminals
at each channel.

1 - Turn the equipment on, allowing a Iew minutes for warrnup.

3 - Connect the output at the IM distortion analyzer to the left channel
AUX input, lFirst, remove the connector from the tape recorder, if
present]

4 - Connect the input of the IM distortion analyzer across the Lohm
load connected to the left channel.

5 - Set the receiver volume control to produce a 25-watt RMS output,
as measured across the left channel load,

6 -- Set the left channel phase inverter odiustment control tor minimum
IM distortion.

7-Cannect the output at the IM distortion analyzer to the right
channel AUX input, and the analyzer input across the right channel
load,

I-Set-the Volume control to produce a 25~wotr RMS output, as
measured across the right channel load.

9-Set the right channel phase inverter adrustment control for
minimum lM distortion.

DIAL STRINGING PROCEDURE

UIDE RAIL Fan
DIAL POINYER

i-Rotate drum to maximum clockwise position.

2-Fasten string and spring to drum as shown,
winding dial cord clockwise around drum.
Keep string taut while stringing, or slippage
may result when stringing is completed.

3-After completing stringing, set pointer, to

zero (0) on the dial logging scale, and glue
pointer to dial cord.

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o rm rlsncl unto colronerlou

LINEN YAPE

COMPLETE
sYntNGtNG

START STRINGlNG

DETAIL 0F STRINGING
OF DRUM

FISHER RADIO CORPORATION - NEW YORK'

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