United-Motors-Service-Delco-980296 电路原理图.pdf
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United-Motors-Service-Delco-980296 电路原理图.pdf
23 收音机爱 好者资料库 RadioFans.CN 10.8 V. LINE GOOD SIGNAL VOLUME R-23, MOST-OFTEN-NEEDED 1963 RADIO SERVICING INFORMATION DELCO RADIO BUICK Model 980296 CHEVROLET Model 985264 PONTIAC Models 983579, 983687 STUDEBAKER Models AC-3216, AC-3247, AC-3256 (Continued from page 23. Applicable alignment table is on page 26, under another model.) I. TROUBLESHOOTING PROCEDURE 1. Turn radio on (ear near speaker). If no “thump” is heard, suspect: open fuse, open “Fuse resistor,” loose speaker plug, open speaker, or shorted DS501 transistor. 2. Isolate trouble to a stage (AF, IF, Conv., RFsee letters on circuit board below). Use a noise generator or other device at each point, starting with 1. 3. Measure voltages in defective stage. Note: Voltage between 10.8 V. line (conductor #2) ! T 1 1 trSl ; o oocios. I b | ; o( ; ; ?o ugig! iij IT if * ri J|j YPS31|4 4 .1 I M7 A 0800 <4 y, i $* Iti f Hi J If 1 1 1 (V) 1 rn. m 5# 1 $- - j-1 I m SCHEMATIC DIAGRAMCHANGES IN SOLID LINES V (|) i, fCQ poo . j *1 vz f 7h zm TO r-USC tfLCCK 25 收音机爱 好者资料库 RadioFans.CN
