RCA-Victor-Co-Inc-RC-1208H 电路原理图.pdf

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1、VOLUME R-23, MOST-OFTEN-NEEDED 1963 RADIO SERVICING INFORMATION RCA VICTOR 3RG1 Series, Model 3RG14, Chassis RC-1208C; 3RG3 Series, Models 3RG31, 3RG32, 3RG33, 3RG34, Chassis RC-1208D; 3RG6 Series, Models 3RG61, 3RG64, Chassis RC-1208H. (Continued on the next page adjacent at right where circuit dia

2、grams are shown) DESCRIPTION Instruments of the 3-RG-l Series and the 3-RG-3 Series are pocket style radio receivers which use Chassis RC-1208C (3-RG-l Series) and RC-1208D (3-RG-3 Series). Both series are housed in vertically styled Impac cases which are similar in appearance. A two-section printed

3、 wiring board is used. One section con tains the battery clips and the speaker clips (an earphone jack and one capacitor are also on this section in the RC-1208D and RC-1208H Chassis). The second section contains the remaining com ponents. The first section is mounted in the case with the com ponent

4、 side down, and the second section is mounted with the component side up. BATTERY REPLACEMENT 3-RG-l Series, 3-RG-3 Series 1. Swing easel handle to the front by bringing handle around the bottom of the case. DO NOT FORCE HANDLE AROUND THE TOP AS THIS WILL DAMAGE THE CASE. 2. Insert a coin in the slo

5、t on the bottom of the case and twist. This will snap the two sections apart. 3. Replace batteries, observing correct polarity. 3-RG-6 Series 1. Unsnap two leather tabs and lift up case back. 2. Replace batteries, observing correct polarity. EARPHONE CONNECTION Only a high impedance earphone (2000 o

6、hms) should be con nected into the earphone jack. RCA accessory earphone Number RK-299 is recommended. ALIGNMENT PROCEDURE For all alignment operations, connect the low side of the signal generator to the common negative” wiring and keep the oscillator output as low as possible to avoid AVC action.

7、Connect output meter across voice coil. Set volume control at maximum. USE PROPER ALIGNMENT TOOL FOR MAKING ADJUSTMENTS. CORES ARE EASILY BROKEN BY USE OF AN IMPROPER TOOL, MAKING REPLACEMENT OF ENTIRE COIL OR TRANSFORMER NECESSARY. Connect High Signal Dial Adfust for Side of Signal Gen. Pointer Gen

8、. to Output Setting Max. Output Antenna gang stator thru T4 (3rd I-F) 455 kc Gang fully open T3 (2nd I-F) .01 mf capacitor T2 (1st I-F) Repeat Steps 1, 2, and 3. 1620 kc Gang fully open Oscillator trimmer C5 Short wire placed near 1400 kc Antenna antenna for 1400 kc (rock gang trimmer radiated signa

9、l if necessary) C2 600 kc 600 kc (rock gang) T1 osc. coil Repeat Steps 5, 6, and 7. # USEO ON RC-I208C ONLY *K USEO ON RC-I20BDBi RCH208H Chassis LayoutView from Component Side (Removed from Case) 126 收音机爱 好者资料库 RadioFans.CN VOLUME R-23, MOST-OFTEN-NEEDED 1963 RADIO SERVICING INFORMATION O i Rll J-W

10、 -V1- i J J 7-1 / C RH X / ,oiT y | i *- , L-iv V lJ I n icmt:a cN /A# ! A Vr-. !*-r Sr V- SEA J / L I T i :* * r. r J S * O ” *yrto r , L- -, r*-. *k til1 i aJ #C5b-j; |-n-1I LJ # USED ON R01208C ONLY USED ON RC-I206D 8 RC-1208H Chassis Wiring and ComponentsView from Wiring Side (Removed from Case)

11、 o 1 o 127 SPEAKER CUPS 收音机爱 好者资料库 RadioFans.CN VOLUME R-24, MOST-OFTEN-NEEDED 1964 RADIO SERVICING INFORMATION RCA VICTOR 4RG1 Series, Models 4RG11, 4RG12, 4RG16, Chassis RC-1208D 4RG3 Series, Models 4RG31, 4RG34, Chassis RC-1208H 2N1526 n CONV OSC COIL 02 2NI524 (ST IF AMR 2N1524 2 NO IF AMR 2N408

12、 DRIVER C 56 V 05 2N408 OUTPUT _ V, _CRN L -,5 Y? . 5 B V EARPHONE l004 | jac* -0 2V-* _!?_ 104 V I 4 2I iiai Lai4v*. 1 06 f2N406 OUTPUT .I4v FERRITE 15-16.5 LIA/B ANTENNA Connd High St*p Sid* of Signal Generator to Anlonna gang stator CIA thru 01 mf capacitor Short wiro placed near antenna for rodi

13、ated signal Signal Gen. Output Dial Pointer Sotting 455 kc Gong fully open Repeat Steps 1, 2, on 3 1620 kc Gang fully Open 1400 kc 1400 kc (rock gang if nocossary) 600 kc 600 kc (rock gang) Adjust for Max. Output T4 (3rd l-F) T3 (2nd l-F) T2 (1st l-F) Oscillotor trimmer C5 Antenna trimmer C2 6 VOLTS

14、 VS 354 (4 REQD) I00MF J RESISTANCE VALUES ARE IN OHMS K-1000 ALL CAPACITANCE VALUES LESS THAN 10 ARE IN MF, THOSE ABOVE I 0 ARE IN MMF EXCEPT AS NOTED. _ VOLTAGES MEASUREO WITH VOLTOHMYST FROM BATTERYffr) 6 SHOULD WlTHIN 20% WITH A NEW BATTERY TI OSC COIL . T2 TO T4 WCEX DOT 1 2 6 | |5 4 _*| 3 TERM

15、 VIEW tc iv Ql TO 06 E J: xy COLOR DOT TERM. VIEW Repeat Steps 5. 6, and 7. CHASSIS REMOVAL Remove timing knob. Open case Remove two screwsone at each cornerlocated near antenna. Remove two screws located between positive battery contacts. If speaker is connected to board by wires, unsolder wires at board Lift slightly the end of each board that was secured by screws and slide boards out of slots which hold op- posits ends Wiring Side (Removed from Case) 37 收音机爱 好者资料库 RadioFans.CN