RCA-Victor-Co-Inc-RC-1163 电路原理图.pdf

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1、VOLUME R-17, MOST-OFTEN-NEEDED 1957 RADIO SERVICING INFORMATION 108 收音机爱 好者资料库 RadioFans.CN VOLUME R-17, MOST-OFTEN-NEEDED 1957 RADIO SERVICING INFORMATION RCA Victor Model 7-BX-9H, Chassis RC-1163, Continued from previous page Connect High Pointer Adjust for Output | Setting Max. Output Disconnect

2、loopremove chassisremove botton 2nd I.F. Trans. T2 Top on AC operation an isolation transformer (117v./117v.) may be necessary if the test oscillator is also AC operated. Critical Lead Dress 1. Dress all filament leads next to chassis. 2. Use short pigtail leads on components to VI, Pin 6. 3. Dress

3、gang leads direct to avoid excess lead length. 4. Dress capacitor C17 across V3 socket to act as shield for C21. 5. Dress capacitors C3, C4 and C6 down to base between VI socket and V2 socket, use short leads. 6. Use short pigtail lead on C16 to V3-2 and dress away from Pin 6. 7. Dress capacitor C24

4、 down to base. 8. Twist loop antenna leads and dress into slots provided in cabinetallow sufficient slack to permit rotation of antenna. 9. The “A band series ant. coil (L3) and B band shunt ant. coil (L2) should be dressed away from chassis. DIAL CORO & POINTER ASSEMBLY SHOWN WITH TUNING GANG CONDE

5、NSER IN MAX. CLOCKWISE (CLOSED) POSITION. 2000 kc signal “B Band T4 R.F. core and T7 Osc. core alternately while rocking gang Repeat Steps 9, 10 and 11 Reassemble chassis and antenna in cabinet. Check adjustment of C29 (“B Ant.) at 4800 kc and C30 (“A Ant.) at 1400 kc. T5 C32 C31 T4 T7 455 KC VR.F A

6、 R.F VR.F B R.F “BOSC. TOPS 600 KC 1400 KC 4800 KC 2000 KC .2000KC BOTTOM WAVEBAND SWITCH r ML6 j $OHvJ isKf Dial-Indicator and Drive Mechanism Chassis Removal 1. Remove control knobs (pull off). 2. Unsolder the two loop antenna leads. 3. Pull out battery and disconnect battery plug. 4. Remove the f

7、our chassis mounting screws, two at front sides and two at top rear. LINE CORD SHOWN IN POSITION FOR BATTERY OPERATION plastic cabinet NOTE POSITION OF THUMB & FINGERS TUNING CONTROL 455KC TOP & BOTT. VOL. CONT. a ON-OFF SWITCH CABINET BACK (FULLY OPEN) Tube and Trimmer Locations Removal of Cabinet Back 109 收音机爱 好者资料库 RadioFans.CN