Galvin-Mfg-Co（Motorola）-HS-326 电路原理图.pdf

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1、MANUAL OF 1953 MOST-OFTEN-NEEDED RADIO DIAGRAMS MOTOROLA, INC. ALIGNMENT Model 62X21, Chassis HS-326 NOTE: If AC power is used, it is recommended that an isolation transformer be placed between the power line and the receiver to avoid hum and electrical shocks. If an iso lation transformer is not av

2、ailable, 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 coil* 2. Connect the low side of the signal generator to B 3. Set the signal generator for 400 cycle, 30% modulation. 4. Turn the receiver volume control

3、 to maximum. 5. Use a small fibre screwdriver for aligning the IF and diode transformers. 6. As stages are brought into alignment, reduce the signal generator output to a level which produces less than 1. 25 volts (.5 watt) across the voice coil to avoid overloading the receiver. 7. See Figure 5 for

4、 adjustment locations and the following chart for procedure. NOTE: The BC band must be aligned before SW. If the BC trimmers are adjusted, the SW must also be realigned. DUMMY GENERATOR GENERATOR GANG ANTENNA CONNECTION FREQUENCY SETTING ADJUST REMARKS -1 IF ALIGNMENT 1. 1 mf RF section of 455 Kc Fu

5、lly 1, 2, 3 Adjust for maximum. gang (rear open use lowest scale. Loosen SW Osc trim 8. 8. 400 SW Ant terminal 16 Me 16 Me on 9, 10 Set generator output to max. ohms dial scale (SW Ant SW RF) Adjust for max on VTVM. 9. - - - - - Remove short from gang. 10, 400 SW Ant terminal 16 Me 1 6 Me on 8 Gener

6、ator output reduced to 25 ohms dial scale (SW Osc) microvolts. Adjust for max (1st peak on output meter) (Check image freq at 16*91 me) Connect generator output to 5 diameter, 5 turn loop and couple inductively to receiver loop. Keep loops at least 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1953 MOST-OFTEN-NEEDED RADIO DIAGRAMS MOTOROLA, Inc. (See preceding page, at left for alignment) MODEL 62X21 CHASSIS DIAL RESTRINGING DETAIL tuning shaft 收音机爱 好者资料库 RadioFans.CN