RCA-Victor-Co-Inc-7-HF-5 电路原理图.pdf

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1、VOLUME E-17, MOST-OFTEN-NEEDED 1957 RADIO SERVICING INFORMATION rca Victor Model 7-HF-5 115 V.A.C. POWER SUPPLY 6N0. OR-8 ISOLATED FROM CHASSIS C13 .047 ntn CHASSIS CRITICAL LEAD DRESS 1. Dress all heater leads and power cord close 10 chassis and away from 12AX7 tube socket and phono input jack to m

2、aintain low hum level 2. Keep shielded lead Wl, including shield connections, as short as possible. 3. Dress record changer power cable and pickup cable as far apart as possible to minimize hum pickup. K* 1000 ALL RESISTANCE VALUES IN OHMS. ALL CAPACITANCE VALUES LESS THAN 1.0 IN MF AND 1.0 ft ABOVE

3、 IN MMF EXCEPT AS INDICATEO. NOTEThe ON-OFF” switch is not part of the volume con trol. The record changer must be “ON” for power to be applied to the amplifier. The “NORMAL-STEREO” switch should be placed in the STEREO position when using the speakers of this instrument for stereophonic sound repro

4、duction from another source. CATHODE CURRENTS VI_I2AX7_0.25MA V2.50C5.51.4 MA V3_50C5_51.4 MA STYLUS REPLACEMENT The dual stylus is held in position by a spring clamp. To remove stylus, sim ply hold pickup sideways and pull spring clamp away from stylus and allow it to drop out. When inserting stylus, be certain that the small diam eter rod holding the styli rests in ihe notch of the drive arm connecting to the cartridge element. 113 收音机爱 好者资料库 RadioFans.CN