RCA-Victor-Co-Inc-RZG125 电路原理图.pdf

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1、nr Model RZG 125 188 2SBI 86 AMP 2ndA F AMP r 9 4 4* *j -4 2V CIS -4 2V 0 I s*f /rx I L-H Rl4|R15LR 6LC1 4?17f RIB f f 3900 It* b200pn 3300 2200 ALL RESISTANCE VALUES W OHMS K = 1000 ALL CAPACITANCE VALUES LESS THAN I OARE N $f THOSE 1 0 ABOVE ARE W PF EXCEPT AS .NOTED VOLTAGES ARE MEASURED WITH “VO

2、LTOHMYST- TOf+BATTERY. AND SHOULD HOLD WITHN 20% WITH NEW BATTERY. VOLUME CONTROL AT MNWUM. AND NO SIGNAL 06 AND 07 ARE A MATCHED PAIR. Ql -07 L2-L5 JJ TERMNAL VEWS CURRENT DRAIN VS POWER OUTPUT 29.7 100 32.5 125 9V8ATT , 11-11 6-RCA VS334 OR EQUiv ONOFF SWITCH ON VOL CONT 39.2 200 41.1 225 42.6 250

3、 43-2 260 Schematic Diagram 2* cjs = rm Li 05 101* 5 ! cioi sis W Component Locations (Component View) ALIGNMENT PROCEDURE Instruments Required 1. RF Signal Generator (RCA WR-50B or equivalent) 2. Electronic Voltmeter (RCA WV 500A or equivalent) General 1. Signal input must be as low as possible to

4、avoid overload and clipping. (Use highest sensitivity of output indicator.) 2. Loudness control at maximum. 3. Standard modulation is 400 cycles at 30% amplitude. Instrument Connections RF Generator- Connected to TP1 or short piece of wire near antenna E.V.M connected to fP 2 Set Signal Set Dial Adj

5、ust for Max. L3 (1st IF) 455 kc Gang Closed L4 (2nd IF) L5 (3rd IF) Repeat Steps 1 through 3 to obtain maximum sensitivity 525 kc Gang Closed L2 (Osc. coil) 1650 kc Gang Open CA2T (Osc. trim) 1400 kc 1400 kc Roeg gang CA 1 T (Ant. trim) Repeat Steps 5 through 8 to obtain best tracking and selectivity 125 收音机爱 好者资料库 RadioFans.CN