United-Motors-Service-Delco-989831 电路原理图.pdf

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1、VOLUME R-22, MOST-OFTEN-NEEDED 1962 RADIO SERVICING INFORMATION VOLTAGES MEASURED TERMINAL TO CHASSIS WITH A VTVM-NO SIGNAL AND 12.0 VOLTS AT ILLUS. OSCILLATOR GRID VOLTAGE TAKEN WITH SET TUNED TO 1000 KC. TOTAL A DRAIN AT 12V-|.6 AMPS. TOLERANCE ON VOLTAGES 10% *-INDICATES LEAD FROM TUNER COIL ASSY

2、. *-BEFORE MEASURING TRANSISTOR VOLTAGES, THE SHORTING TYF SPEAKER SOCKET MUST BE OPENED AND A 4 OHM SPEAKER CONNECTED. IF TRANSISTOR IS REPLACED, ADJUST BIAS POTENTIOMETER (ILLUS. 73) TO OBTAIN PROPER COLLECTOR VOLTAGE WITH 12 VOLTS INPUT TO RADIO. +-ILLUS. SS IS A FUSE RESISTOR FOR THE TRANSISTOR. SERVICE WITH EXACT RE PLACEMENT. A-ILLUS. 22 IS USED WHEN ILLUS. 47 IS 150 OHMS. 77?. 12 VOLT HEATERS PONTIAC 989831PRINTED CIRCUIT SHOWN IN HEAVY LINES 16 in tail i imi 收音机爱 好者资料库 RadioFans.CN