United-Motors-Service-Delco-988276 电路原理图.pdf

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1、VOLUME R-21, MOST-OFTEN SERVICING INFORMATION I2DZ6 R. F. AMR I2AD6 OSC-MOO I2CK6 I.F. AMP. HOC . TOI* VIEW I2DS7 DET.-AUD. liil m A.J L.JTJ r. m fS 80 .00002* 0K grI 7IA 1 TOOOU DO-not present in all radios. VOLTAGES MEASURED TERMINAL TO CHASSIS 72 WITH A VTVM - NO SIGNAL AND 12.0 VOLTS 4. AT ILLUS

2、. 29. f OSCILLATOR GRID VOLTAGE TAKEN WITH SET TUNED TO 1000 KC. TOTAL A” DRAIN AT 12 V. -22. AMpS. &?. TOLERANCE ON VOLTAGES 10% 21 * - INDICATES LEAD FROM TUNER COIL ASSY. y * * 8EF0RE MEASURING TRANSISTOR VOLTAGES, THE SHORTING TYPE SPEAKER SOCKET must be Opened and a a ohm speaker connected, if

3、transistor is replaced, ADJUST BIAS POTENTIOMETER (ILLUS. 73) TO OBTAIN PROPER COLLECTOR VOLTAGE WITH 12 VOLTS INPUT TO RADIO + - ILLUS. 60 IS A FUSE RESISTOR FOR THE TRANSISTOR. SERVICE WITH EXACT RE PLACEMENT. C47A YCLLOfc DS50I . OUTPUT A If g to “a 1 SUPPLY ON A 470R.33 ) OHM _0aJ4j|_730_ LTi_n I Q - OUTPUT TRANSFORMER WILL APPEAR SHORTED IF SHORTING TYPE SPEAKER - SWITCH IS NOT HELO OPEN. CHEVROLET 988276PRINTED CIRCUIT SHOWN IN HEAVY LINES, 30 收音机爱 好者资料库 RadioFans.CN