RCA-Victor-Co-Inc-6BY4B 电路原理图.pdf

VOLUME R-16, MOST-OFTEN-NEEDED 1956 RADIO SERVICING INFORMATION rcaVictor 6-,v-4* y 1V< 1 UI Chassis Nos. RC-1153, RC-1153A V2 1U4- l-FAMPL. V ttTlII : -C6 J LJ -Sfl -.111 b p_-Tn. . eTT; FERRITE r 62is 047 -0.3V.s ROD RJ 71 100 K LL7 j j | | U 1 , “It 4r o 1 * C Cl-B.i it l! 2-12 . -C2 X R3 iC4 B.4-1 56 * 4.7 T.O033 ( 253.51 -L MEG/ LX _t t_T2_U sf.3T iliMr 14-th V3 1U5 2ND. DET. A-F., A.V.C. /Si 47 | Hf4l * 17F-1X * .01 I 22K V4- 3V4 output +82.2 V. 21-T R9 4V 1 MEG. JL C13 J50 MF! Jl-F REARVIEW VS 06+ BATTERY SI-REAR RAD-PHONO SWITCH S3 I- OH-OFF SW. (ON VOL. CONTR.) 1?/ J Y S2- REArT 45R.P.M./ changer! C14 6 V. *CDWS 560 4-VS036 x- wr CHASSIS REMOVAL For access to tubes and batteries, it is necessary only to remove the tour slotted screws holding the bottom cover to the case. To remove the chassis, it is necessary to: 1. Pull off four control knobs. 2. Remove bottom cover. 3. Remove batteries. 4. Disconnect shielded cable from terminal board near pickup arm mounting. 5. Disconnect wires from phono motor. 6. Unfasten adapter socket (J2) and Battery-Adapter switch (S2) from cabinet. 7. Remove four chassis mounting screws. STYLUS REPLACEMENT For access to the ceramic pickup, it is only necessary to lift the end of the pickup arm and move it to the right so that it projects over the edge of the cabinet. To remove stylus, grip with tweezers at back end and pull away from the pickup. The shank of the stylus holder is im bedded in a rubber block which is set in a “U shaped spring clip. This spring clip holds the stylus assembly to a plastic support. The shank of the stylus rests in a metal saddle. T4 OSC. 600 KC BATTERYO ADAPTER ( SW. A 1 .J1 + i.5v. _SEN _+6V. ll?rM -yWHT-BLK-1 PHONO MOTOR BATTERY The phono motor battery must be placed in its retaining clips with the removable cap end to the left. If the battery is reversed, the motor will turn in the wrong direction. The location of the phono motor battery affects the antenna inductance. When making adjustment of Cl-B antenna trim mer, this battery must be placed parallel to and 34-inch away from the antenna rod. RESISTANCE VALUES IN OHMS. K=|OO0 CAPACITANCE VALUES LESS THAN 1, |N MF. 1 AND ABOVE IN MMF. UNLESS OTHERWISE NOTED. socket voltages measured to CHASSIS WITH VOLTOHMYST SHOULD HOLD WITHIN 20% WITH NEW BATTERIES. SJ AND S2 FRONT AND REAR SECTIONS VIEWED FROM FRONT AND SHOWN IN MAX. COUNTER. CLOCKWISE POS. NO. J SJ POS-1 - RADIO. 2-PHONO. 52 POS. I-BATTERY. 2-A.C. R3WER ADAPTER In PHONO position, the fila ments of the 1R5 and 1U4 tubes are not energized when the BATTERY- ADAPTER switch (S2) is in BATT position. Power to the phono motor is not controlled by the ON-OFF switch on volume control; it is controlled only by the RADIO-PHONO switch. Tuning Drive Cord GANG IN MAXIMUM CLOCKWISE POSITION 455 KC/ TOP a BOTTOM T3 | OUTPUT j TRANS.j LI_ ROD ANTENNA CI-BT ANT. -1400 KC CI-AT OSC. 1620 KC TUNING CONTROL -POINTER SHAFT BOTTOM VIEW 120 收音机爱 好者资料库 RadioFans.CN