Fisher E 48 Custom Electra VI Service Manual

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THE FISHER

CIISTIIM ELECTRA III

SERVICE
' MANUAL

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MODEL E-48

THE FISHER E-48

VA
A

PRICE: $1.00

FISHER RADIO CORPORATION ' NEW YORK

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ALIGNMENT INSTRUCTIONS

Reed These Instructions With Extreme Care Before Attempting Alignment.

by the proper waveform shape.

SIGNAL GENERATORS: The signal generator equipment must be able tO supply the following:

CHASSIS: Turn the station selector completely counterclockwise, without torelng. Dial pointer
should be at zero Index mark on logging scale. It not, reset the dial pointer. Diwonnm the
external antennas and the AM antenna link. Set Volume Control to rni

mum lCCW.)

When using an oscilloscope [or alignment, set the output level controls for no overload, as shown

INDICATOR: DC VlVM. AC VlVM. and scope.

FM RF modulated 307. I: 22.5 KC deviation] at 400 cps; AM RF modulated 307. at 400 cps;

ALIGNMENT: Allow the chassis and test instruments to warm up Ior at least fifteen minutes.

Ad|ull the ltne voltage for ll7 volts AC, 50360 cycles. Ute Iully insuloled tools: a small screw-

driver {or all trimming :apacitou; a K-lran tool for 2, 12, 13, 24; a hex tool for 25, 26.
U7. L2, L5, L6, L10. For AM RF alignment, short [uncttert of Us and R42 to ground.

ctulssts SIGNAL cmuuon INDICATOR AllGflMEN'
SIEPS
suscton 55$?ng COUPLING mo. Moo, TYPE CONNICTION ADJUST INDICAYION
AM ALIG N M E NT I AM Polnt OI na slgnol AM Gen. connetted thru .55 Kc 30-; AM at AC erM to un ,fi'id Mmmm you .
and no mm mm .orut up to v2, Fln t 400 :p. acaon Output ham," °°
AM Gen. (onneded thru 30% C VTV L (1 III) L5
220~uu cup. K AM at A M to e .
2 AM °°° Kc to the AM antenna terminal wo C 400 m xcmn Output Li M""'"" "9'
Ditconttecr link.
AM 6"" "Tm" "W 30]. AM AC va l. lt UH as
220w mp. at to . , ,
3 AM MO Kc to the AM antenna termlnal 0° KC 00 (pl man Outh ac mm '°"°'
Dileormxt link.
1 Repeat "2p; 2 and a In! proper dial culiblalian and molimum output.
FM Gen. canned-d In It 23 1.5 -
Point cl no Iignal Dc VTVM to - Mex-mum negative
5 FM . ungrwnded tube :hleld 10-7 MC NW . and 16, top
and ne lnteIIeIence mm VI tut poml :t & ham, VU'IW'
Connul two 47x on...
Poi," el no Sigm' en. court-c e 0 acres; . Met a Zero madmg M "N,
FM AL IG N M E NT 6 4 .... .. .....mtl vwrwndad tube ....n °" C "°"° .VWM w... ... 1 "P .... ......
mt Vt luntllofl OI lhe two
47K ohm mitten and the
Iunction at Hz and C69
FM Gert. (onneued thlu
. p. t, t . 30]. FM DC VWM to tut point 2 l9. L6. Check for sin. wavelorm
7 FM 90 MC I szoihrrfl'nztfi' m 90 Mc [22.5 KC Dev.) and nope to L." L: and adjust Ior maximal
Am, mm at A00 (9! mm Output negative voltage
FM Gen. connected thru
_ . 30% m cc mm to mt point 2 d Check tor line wavelomt
8 FM too Mc 'W" $911? ;;x",7;,,';;a"°" 106 MC 427.5 KC Dew] and nope to L." as; and adiull tor malirnrm
ANN... telmlnalt at 400 wt RCRDR Output negative voltage
:2 Repeal new 7 and a at least olKe Io! proper dial calibration and munlmum output.
NOTE: Fol (allbmtlng both the AM and FM, uxe as low on output voltage as possible Irorn your signnl generator.

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