Galvin-Mfg-Co（Motorola）-62C3A 电路原理图.pdf

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1、MANUAL OF 1953 MOST-OFTEN-NEEDED RADIO DIAGRAMS MODELS MODELS 62 Cl 62C1A 62C2 62C2A 62C3 62C3A CHASSIS HS-299 Motorola (Continued on the next page, adjacent at right) ALIGNMENT is recommended that an isolation transformer be 4. Turn the receiver volume control to maximum. NOTE: It is recommended th

2、at an isolation transformer be placed between the power line and the receiver to avoid hum and electrical shocks. If an isolation transformer is not available, connect the low side of the signal generator to B- through a . 1 mf capacitor. 1. Connect a low range output meter across the speaker voice

3、coil. 2. Connect the low side of the signal generator to B-. 3. Set the signal generator for 400 cycle, 30% modulation. DUMMY STEP ANTENNA IF ALIGNMENT 1, I . 1 mf RF ALIGNMENT 2. I . 1 mf GENERATOR CONNECTION GENERATOR FREQUENCY 5. Use a small fibre screwdriver for aligning the IF and diode transfo

4、rmers. 6. As stages are brought into alignment, reduce the signal generator output to a level which produces less than . 40 volts (.05 watt) across the voice coil to avoid overloading the receiver. 7. See Figure 2 for adjustment locations and the following chart for procedure. GANG SETTING ADJUST Gr

5、id of conv (RF section of gang) Grid of conv. (RF section of gang) Radiation loop* Radiation loop* 455 Kc Fully 1,2, 3 SEC TOP ?)PRI BOT DIODE H) SEC TOP FIGURE 2. TUBE AND ALIGNMENT LOCATION 455 C (2) PRI BOT 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1953 MOST- MOTOROLA, Inc. (Continued from preceding page) OFTEN-NEEDED RADIO MODELS MODELS 62Cl 62CIA 62C2 62C2A 62C3 62C3A DIAGRAMS CHASSIS HS-299 (* o i_ _I z O o Si -1 “ Q lit 2 - O lox 67 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN