Fisher PHILHARMONIC P 22 Service Manual

Page 1

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MODEL P-22

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CHASSIS SERIAL NUMBERS FROM 'IOOOI TO 19999 INCLUSIVE
PRICE: $1.00

FISHER RADIO CORPORATION - NEW YORK

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Page 5

ALIGNMENT INSTRUCTIONS

Read 'l'ltese Instructions With Extreme Cue Before Attempting Alignment.

CHASSIS: Turn the station selectors completely counterclockwise, without forcing. Dial painters
should be at zero index mark on logging scale. It not, (esel the dial painters. Disconnect the
external antennas. Set Volume Control close to minimum ICCW.]

When using an asmlloscope Ior alignment, set the Volume control for no overload, as shown by
the proper waveform shape.

SIGNAL neurons: The signal generator eautpment must be able to supply the following:

FM RF modulated 30% {i 22.5 KC deviation) at 400 cps; AM RF modulated 30% of 400 Cpss
INDICATOR: DC VTVM, AC VTVM, and scope for alignment.

ALIGNMENT: Allow the chassis and test Instruments to warm up far at least fifteen minutes.
Adiust the line voltage for II7 volts AC, 50-60 cycles. Use fully insulated tools: a small screw
driver for all trimming Capacitors; 0 K-Iran tool for ll, 22, Z4, cl hex tool lot 231 ZS, 16, L2,
L6, L7, L9.

Note: For calibrating batlt the AM and FM. use as low an output voltage as possible from your signal generator.
CHASSIS SIGNAl GENERATOR INDICATOR AllGNMENT
STEPS
SELECTOR :gfgc'gofla COUPLING FREQ. MOD. TYPE CONNECYION ADJUST INDICATION
Point at no signal AM Gen. eannsetoa thru 307.. AM at AC mm to Ch. A 23, Z5 .
AM AL I G N M E N T 1 AM and no tntertercnee .0t rut cup. to v2, Pin l 55 Kc 400 cps SPEAKER Output 'gggnd Max-mam voltage
m
AM Gan. connected lhlu 307 AM 0, AC VTVM ,0 Ch A
2 AM 660 KC 2204M rap. eon KC ' ll, L9 Mo 'mu Volta e
. ta AM antenna terminal 40° " SPEAKER °"' x' m 9
AM Gm 9 W 307 AM at AC VIVM ta Ch A c4 csa
3 AM 1400 KC 220-wt cap. le0 KC ° ' ' M * v It
to AM antenna terminal 40° 9 SPEAKER °"' mm ° age
4 Repeat steps 2 and 3 lot proper dial calibration and maximum output.
, . Z! 22
Pom! oI no stanal FM Gen- mmmed ° DC VTVM - ,
5 FM and na interterenea "figmgf {/Ube held 0-7 MC One across C69 ""dltgtlarlllp and MWmvclnturg'eegmwe
and 25, bottom
Connect two 47K ohm
FM G d resistgésqin series
- t - en. connect: to acres: . Connect a r
F M AL I G N M E N T 6 FM amugigggggfle ungrounded tube held to 7 Mc None mm between the za top Z°z':,,°,:',"f(:.: 1"
aver Vl iunstian at the two
47K ahm resistors
and iunetlan (:74, (.76
FM Gen. connected thru 307., FM DC va across co? L2 L7 Check tor srne wavefnrm
7 FM 90 MC two lzo.onrn carbon resistars «to MC (22.5 KC Dev.) anal scope to Ch. A '6 and aalust for maximum
to PM antenna terminals 3 at A at 400 cps SPEAKER Output negative voltage
FM Gen. connected thru 307. FM DC VTVM across cal; C20 and Check tor slne waveform
3 FM 106 MC lwo IZO-ohm carbon resistors loo MC 02,5 KC Dev.) and scape to 0.. A C23 and acttust tar maximum
ta FM antenna termtnals 3 a 4 at 400 rps SPEAKER Output negative voltage
v Repeat steps 7 and a at least once for proper dial (allbration and maximum output.