Galvin-Mfg-Co（Motorola）-53LC2 电路原理图.pdf

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1、ADJUST MANUAL OF 1953 MOST-OFTEN-NEEDED RADIO DIAGRAMS MOTOROLA, Inc. (Continued on the next page at right) CHASSIS HS-347 ALIGNMENT MODELS 53LC1 53LC2 53LC3 NOTE. The receiver may be operated either from batteries or from the power line during alignment. If AC power is used, it is recommended that

2、an isolation transformer be placed between the power line and the receiver to avoid hum and electrical shock* If an isolation transformer is not availahle, connect the low side of the signal generator to chassis through a . 1 mf capacitor. 1* Remove chassis from cahinet. If operated from power line,

3、 during alignment, it will be necessary to TEMPORAR ILY place jumpers across interlock switch before power can be applied. Jumpers are not required if battery power is used. 2. Connect a low range output meter across the speaker voice coil. 3. Connect the low side of the signal generator through a .

4、 1 mf capacitor to chassis. 4. Set the signal generator for 400 cycle, 30% modulation. 5. Turn the receiver volume control to maximum. 6. Use a small fibre screwdriver for aligning the IF and diode transformers. 7. Adjust the signal generator output to produce .40 volts (. 05 watts) across the voice

5、 coil. As stages are aligned, reduce the generator output (not receiver volume control) to maintain the .40 volt level to avoid overloading the re- 8. See Figure 5 for adjustment locations and the following chart for procedure. DUMMY STEP ANTENNA GENERATOR CONNECTION GANG SETTING GENERATOR FREQUENCY

6、 REMARKS 1. 2 & 3 (IF cores) B BATTERY RECEPTACLE 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1953 MOST-OFTEN-NEEDED RADIO DIAGRAMS MOTOROLA, Inc. CHASSIS cJnnni (Continued from preceding page, at left) HS-347 53I*C1 53LC2 53LC3 /-cd 2 x v r ut /_ I UJ / j i 5) -H UJI h- o 5 = * Zq K uj 3 y* uj o a. I4 o ? ? “o I- -J 23 g g o o ge ?, 5 JO -J L _ g* g 5 i g i_ 2| o fog g* I-sl r -a i m (-) w* 2s3 os () Zh cvj - 1 3 收音机爱 好者资料库 RadioFans.CN