RCA-Victor-Co-Inc-1RH12 电路原理图.pdf

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1、VOLUME R-22, MOST-OFTEN-NEEDED 1962 RADIO SERVICING INFORMATION RCA VICTOR Models l-RH-10, 1-RH-ll, l-RH-12, l-RH-13, 1-TP-1E, HE, JE (Late Prod.) Model l-RJ-19 Chassis No. RC-1199D Q2 2N4I0 1ST I F AMPL 03 2N4IO 2ND I F AMPL CHASSIS REMOVAL 1. Unsolder the battery spring contacts from the circuit b

2、oard. DO NOT ATTEMPT TO REMOVE CONTACTS FROM CASE. The battery contacts are heat sealed to the plastic case front. 2. Pull the dial knob off of tuning condenser shaft. 3. Remove the knurled nut holding the earphone jack to the case. 4. Remove the two screws holding the circuit board to the case and

3、lift chassis from the case. 5. If necessary to separate chassis and speaker, unsolder speaker leads from wiring side of board. AVOID UNSOLDERING LEADS AT SPEAKER TERMINALS SINCE EXCESSIVE HEAT WILL DAMAGE VOICE COIL LEADS. CRITICAL LEAD DRESS 1. Dress lead from diode to volume control between speake

4、r magnet and top of battery. 2. Keep leads to earphone jack as short as possible. 3. Dress leads from output transistors to speaker towards the edge of the board (away from speaker pot) so as to provide sufficient room for 0.3 mf capacitor. 04 2N408 CRI A F AMPL. Jl FOR EARPHONE INDEX DOT ll2 6 1 15

5、 4 t 3 2 1 r 2 1 nj Lofovl 5 1 J L0J57V5-! 1 t J r 2N4I2 CONV LI-FERRITE ANTENNA -LCI6 I05 T, OSC COIL - TERMINAL FIN LI VIEW TOtA*HOt ma * 2N408 CI4 RI2 270 VOLTAGES MEASURED WITH VOLTOHMYST FROM (+) BATTERY, SHOULD HOLD WITHIN 20%WITH NEW BATTERY VOLUME CONTROL AT MINIMUM AND NO SIGNAL. K-IOOO ALL

6、 RESISTANCE VALUES PN OHMS ALL CAPACITANCE VALUES LESS THAN I O ARE IN MF, THOSE ABOVE 1 O ARE IN MMF EXCEPT AS NOTED MEASURED WITH HIGH SENSITIVITY VTVM NOT USED IN ALL INSTRUMENTS PM SPKR 10 Oa CT VOICE COIL Q5 2NAO& N VOL 680MA CONT 4 0 V -T RCA BATT 4= VS 149 : 1 2N408 OUTPUT CURRENT VS OUTPUT 20.0 MA 12 MW 250 MA 20MW 350 MA 50MW 500 MA POOMW 680MA 240MW (MAX) rri i ( _) li* aT _ - 1 * 1L i-? t,:(,!, VJ -JL * Chassis LayoutView from Component Side Chassis LayoutView from Wiring Side 92 收音机爱 好者资料库 RadioFans.CN