RCA-Victor-Co-Inc-3VF306 电路原理图.pdf

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1、VOLUME R-24. MOST-OFTEN-NEEDED 1964 RADIO SERVICING INFORMATION RCA. VICTOR Models 3VF305, 3VF306, 3VF340, 3VF346, 3VF349, employ Tuner Chassis RC-1205C and Amplifier Chassis RS-199B; while Models 3VF405, 3VF446, 3VF516, 3VF534, 3VF604, 3VF619, 3VF646, use the same Tuner and Amplifier Chassis RS-177

2、H. Service material below and on the next two pages. V2 CSA6 1 ST AM | FM If C8I fiSl CRITICAL LEAD DRESS RC-1205C 1. Dress R3 and R9 up and away from all other corn* ponents. 2. Keep 10.7 me IF grid and opiate wiring short and close to chassis. 3. Dress L3 close to chassis. 4. Keep heater leads awa

3、y from audio grid circuits. 5. Dress C46 and C48 and AC wiring up and away from audio components. RS-177H 1. Dress all heater leads flat along bottom of chassis. 2. Use minimum lead length on all resistors between V401 and V402 and terminal board. 3. Dress feed back leads between terminal board near

4、 output- transformers and V401 and V402, along inside corner of chassis and then along back side of terminal board near V401 and V402. 4. Dress plate leads from output transformers to output tubes down center of chassis away from feed back leads. 5. Dress power resistors R426, R427, and R428 well aw

5、ay from chassis. All insulated leads are to be dressed away from these resistors. 134 收音机爱 好者资料库 RadioFans.CN VOLUME R-24, MOST-OFTEN-NEEDED 1964 RADIO SERVICING INFORMATION RCA VICTOR Continuation of service material on Tuner Chassis RC-1205C, for list of models using this chassis see preceding pag

6、e at left, material on Amplifier Chassis RS-177H and RS-199B is on the next page, over. RIOI 1*00 RI9 -CI9 6800 3*LC21 FUNCTION SELECTOR SWITCH (S3) SHOWN IN POSITION I $. VIEWEO FROM SHAFT END. POSITION FUNCTION 1 FM- 5TR 2 FM 3 AM A PHONO 5 TAPE READINGS MARKED FM ARE TAKEN IN PM- STEREO POSITION,

7、 AM ARE TAKEN IN AM POSITION 1 - I LEFT CHANNEL iF07 AMtOOjj. 1ST AUDIO pjj _ VBA UFQ7 2ND AUDIO R47A ,- . SOOK K SPEAKER PHASING The two speaker systems must be properly connected in order to have in-phase” sound outputs. Incorrect connec tions will be evidenced by loss of bass” or distortion in th

8、e sound when playing a monophonic recording and listening .v C3VP3 apo y L3VF4 USES I- IClB RESISTANCE VALUES IN OHMS K- IOOO _ 20 Mf ALL CAPACITANCE VALUES LESS THAN I ARE |N MF, VALUES 1 ABOVE ARl N MMF,EXCEPT AS NOTED. . VOLTAOCS MEASURED TO CHASSIS CROUNO WITH - * VOLTOHMYST 4 SHOULD HOLO WITHIN

9、 t 20% WITH IXO V. POWER SOURCE. - RC-tZ05C TUNER CHASSIS from a point midway between the two speaker systems. Similarly the speakers in each system must be phased with each other. To maintain correct phasing, the speaker connections as shown should be closely followed. C3VF4 USES 1-12 8 2-3f SPEAKERS + Afit (NOT USED IN 3VF4) * 9/) f IN 3VF4 6 3VF5 SOjf IN3VF8 -PLAIN TRACER Speaker Wiring Diagram PLAIN TRACER 135 收音机爱 好者资料库 RadioFans.CN 136 RC1205 C Chassis Layout 收音机爱 好者资料库 RadioFans.CN