RCA-Victor-Co-Inc-1RC31 电路原理图.pdf

《RCA-Victor-Co-Inc-1RC31 电路原理图.pdf》由会员分享，可在线阅读，更多相关《RCA-Victor-Co-Inc-1RC31 电路原理图.pdf（2页珍藏版）》请在收音机爱好者资料库上搜索。

1、98 收音机爱 好者资料库 RadioFans.CN VOLUME R-22, MOST-OFTEN-NEEDED 1962 RADIO SERVICING INFORMATION RCA Victor Models l-RC-30, l-RC-31, l-RC-34, Chassis RC-1201D, Continued Models of (he l-RC-3 Series are 6 (ube (plus silicon rectifier) clock radios designed for reception on both the AM and FM bands. These i

2、nstruments operate only on a 110-120 volt, 60 cycle power supply. The clock timer features five push buttons which select OFF, ON, DROWSE, RADIO alarm, and auto ALARM. A ferrite rod antenna is utilized for AM reception, and a power line antenna for FM reception. -WINDOW 2)RELEASE TOP LATCH ft PUSH r

3、 OUT TILL BOTTOM LATCH RELEASES (APPROX. 1/4 MAXIMUM.) - -REMOVE 3 SCREWS HOLDING CLOCK (3)SL)DE WINDOW OUT WITHOUT FURTHER TILTING. (3)SLIDE BOTTOM OF CLOCK OUT TILL IT CLEARS CABINET. (DLOWER CLOCK TILL PUSH BUTTONS CLEAR CABINET. (DEPRESS PUSH BUTTONS SLIGHTLY) (6) SLIDE CLOCK OUT OF note: it is

4、noj necessary to REMOVE CLOCK HANDS OR TIME ft ALARM SET KNOB. ) LIMIT OF TILT WITHOUT DAMAGING TABS. CRITICAL LEAD DRESS 1. Dress all bus leads short and direct as possible. 2. Dress all by-pass capacitors and coupling capacitor leads short and direct as possible. 3. Dress all insulated leads down

5、to chassis and away from any hot resistors. 4. Dress power line antenna away from ferrite rod and secure against front by hold down clips. 5. Dress grid capacitor awdy from oscillator coil. 6. Dress output transformer leads away from tuning drum. THE CHASSIS IS CONNECTED DIRECTLY TO ONE SIDE OF THE

6、POWER LINE. AN ISOLATION TRANSFORMER SHOULD BE USED DURING ALIGNMENT OR OTHER SERVICE WORK. AM ALIGNMENT Turn SELECTOR switch to AM position, and turn LOUDNESS con trol to maximum. Connect output meter across voice coil of speaker. Keep generator output low to avoid AVC action. Connect high Set sign

7、al Set radio Adjust for side of signal gen. to gen. to dial to maximum Antenna gang (C25A) through 0.01 T5 (2nd AM IF) 455 kc (modulated) Gang fully open top & bottom T4 (1st AM IF) mf capacitor top and bottom Repeat steps 1 and 2. 1620 kc 1620 kc C27 (osc. (modulated) (gang fully open) trimmer) Sho

8、rt wire placed near 1400 kc 1400 kc C26 (ant. AM antenna (modulated) signal trimmer) to radiate (rock gang) signal 600 kc 600 kc L2 (osc. coil) (modulated) signal (rock gang) Repeat steps 4, 5, and 6. TO INSTALL CLOCK & WINDOW, REVERSE ABOVE PROCEDURE. Clock and Window Removal STRING DRIVE COLLAR 108 MC MGTW FM RATIO DEI AF_AMP /veN (50 C5) AUDI$3JTPUT T3 I07MC| RA?I0 /l2EQ7 DET 2NDFMSAM T5 AMDET 455KC 2% loAM IF T2 10.7 MC 2rta IFMIFoJ T4 455KC l?T AM IF (12BA6 1STFM IF AMP (12BE6) AM CONV 12 600KC AM OSC. View of Chassis Showing Location of Tubes 99 收音机爱 好者资料库 RadioFans.CN