Motorola 55C3 서비스 매뉴얼 - 페이지 3

{카테고리_이름} Motorola 55C3에 대한 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Motorola 55C3 4 페이지. Home radio

페이지 인쇄

ALIGNMENT

Use an isolation transformer between the power line and

the receiver.

If not available, connect low side of genera¬

tor to ground (outer chassis edges) through a . 1 mf capaci¬

tor.

Connect a low range output meter across speaker voice

coil and set volume control to maximum.

Set signal generator output to produce .40 volts across

voice coil.

As stages are aligned, reduce generator output,

to maintain the .40 volt level to avoid overloading receiver.

STEP

DUMMY

ANTENNA

GENERATOR

CONNECTION

GENERATOR

FREQUENCY

(400 cycle mod)

GANG

SETTING

ADJUST

REMARKS

IF ALIGNMENT

. 1 mf

RF ALIGNMENT

. 1 mf

Grid of conVo

(pin 7,

12BE6)

Grid of conv0

(pin 7, 12BE6)

Radiation loop*

455 Kc

1620 Kc

1400 Kc

Fully open

Tune for max

1, 2, 3 & 4

(IF cores)

5 (Osc)

6 (Ant)

Adjust for maximum.

Use

insulated screwdriver.

Adjust for maximum.

^Connect generator output across 5" diameter,. 5 turn loop and couple inductively to receiver loop.

Keep loops at least

12" apart.

ALIGNMENT DATA

Front

1620 Kc

1400 Kc

12BA6

Power

Interlock

]—

■

gsa

50C5

»e ■

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