Fisher 202 T Service Manual

Page 1

SH 507

FISHER
MODEL 202-1

PHOTOFACT® Folder

FISHER
MODEL 202-T

TRADE NAME Ftsher Model ZOZ-T (Serial 30001-39999 Inclusive)

MANUFACTURER Fisher Radio Corp. , 21-21 44th Drive, Long Island City 1, N. Y,

TYPE SET AC Operated 21 Tube FM-AM Receiver wm. Stereo Ampuner
powsn SUPPLY 105 - 120 Volts AC, 50-60 Cycles RATING 95 Watts, .138 Amp, @117 Volts AC
TUNING RANGES-BROADCAST 540 - ISDOKC FREQ. M011 88 - msmc

HOWARD w..sAMS G co., INC. Indlanapolla 6,Indlana

The ltatlng of any available replacement part hereln does the partlcular type of replacement part listed, Repro-
not constitute In any case a recommendatmn, warranty or ductlon or use, without express permlasion, of edltorlal or
guarantyby Howard W Sams at C0. , Inc. , as to the quallty plctorlal content, ln any manner, ts prohlblted. No patent
and sultablllty 01 such replacement part. The numbers 0! ltablllty la assumed with respect to the use OI the lnlormav
these parts have been complled from informatlon furnished tloncontalned hereln. © 1960 Howard W. Sams GI Co. , Incl ,
ltfionglowrd W. Sams & Co., Inc., by the manulacturers o! lndlanapolls 6, lndlana. Printed ln us of Amerlca

DATE ll - Bl] SET 507

.I. ZOZ HGOW
HIHSH

[DE 138

5 H3010!

FflLDEI 5

Page 2

ALIGNMENT INSTRUCTIONS

ALIGNMENT INSTRUCTIONS-READ CAREFULLY BEFORE ATTEMPTING ALIGNMENT

Use only enough generator output to provide a usable indication.

Suggested Alignment Tools: A1, A25, A26, A27 ............. I . GENERAL CEMENT #5003, 8271, 8275, 8276, 8609, 8721, 8722

9150,9298,
WALSCO #2510, 2518, 2519

A2 Thru A7,A9,A16 thru A21 ..... GENERAL CEMENT #5097, 8727

WALSCO #2515

Aa,Aia,A14,A15,A22,A23,A24.... GENERAL CEMENT #9292, 5606, BEDS-L, 9295, 9440

WALSCO #2526, 25m, 2544, 2545

A10,All, A12 .................... GENERAL CEMENT #5004, 5008, 5009

WAlSCO #2520

AM ALIGNMENT-SELECTOR IN AM POSITION

:_

to

SIGNAL SIGNAL RADIO CONNECT
GENERATOR GENERATOR DIAL VTVM ADJUST REMARKS
COUPLING FREQUENCY SETTING
High side of Audio gener- lOKC (AM) AC probe channel Al Adjust for NHNIMUM deflection.
ator to pin '1 (plate) of AM Point of non- "B RCDR. out-
detector. Low side to interference. put jack.
chassis. (AM Band-
width at
"SHARP. )
High side thru . Olmfd to 455KC " DC probe to point A2,A3, Adjust for maximum deflection.
pin 7 (grid) of AM Conver- (400% AM) . Common A4,A5,
ter. Low side to chassis. to chassis. A6, A7
" 455KC Point of non- USE SCOPE Retouch A2 for symmetry of
(30KC Swp.) interference. Connect across response.
(AM Band- Ch. "B" RCDR,
width at Output jack.
"BROAD". )
High side thru ZZTImmf to GOOKC BOOKC Scope as above. A8,A9 Check for sine wave. Adjust for
AM antenna terminal #3. 4000 AM) DC probe of maidmum deflection on VTVM.
Low side to chassis. VTVM to point
. Common
to chassis.
" 1400KC 1400KC " A10 A11 "
A12

FM IF ALIGNMENT USING AM SIGNAL GENERATOR AND VTVM-SELECTOR IN FM POSITION

FM Muting Switch Off.

SIGNAL SIGNAL RADIO CONNECT
GENERATOR GENERATOR DIAL va ADJUST REMARKS
COUPLING FREQUENCY SETTING
High side thru . Olmfd to 10. 7MC (FM) D probe to point A13, A14 Adjust for maximum deflection.
pin 1 (grid) of 2nd FM 1F. Unmod.) Point of non- . Common A15
Low side to chassis. interference. to chassis.

n

D probe to point A14 Readjust A14 for zero reading. A

. Common to positive and negative reading will be
chassis. obtained on either side of the correct
setting.

High side to ungrounded
tube shield floating over
FM Mixer- Osc. Low -
side to chassis.

D probe to point A16,Al7 Adjust for maximum deflection.
. Common A18, A19
to chassis. A20, A21

FIG. I

FIG. 2