United-Motors-Service-Delco-989693 电路原理图.pdf

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1、VOLUME R-21, MOST-OFTEN-NEEDED 1961 RADIO SERVICING INFORMATION Voltages measured terminal to chassis with a VTVMNo signal and 12.0 volts at Illus. 30. Oscillator grid voltage taken with set tuned to 1000 KC. Total A” drain at 12V. - 2.2 amps. Transistor collector current1 amp. Tolerance on voltages

2、 10% *Indicates lead from tuner coil assy- *-Before measuring transistor voltages, the shorting-type speaker socket must be opened arid a 4 ohm speaker connected, if transistor is replaced, adjust hias potenti ometer (Illus. 73) to obtain proper collec tor voltage with 12 volts input to radio. 1Ulus

3、. 59 is a fuse resistor for the transistor. Service with exact replacement. PONTIAC 989693PRINTED CIRCUIT SHOWN IN HEAVY LINES. 收音机爱 好者资料库 RadioFans.CN VOLUME R-21, MOST-OFTEN-NEEDED 1961 RADIO SERVICING INFORMATION DELCO Alignment Procedure for Various 1961 Auto Radios f Output Meter Connections-Ac

4、ross Voice Coil Generator Return_-To Receiver Chassis Dummy Antenna _In Series With Generator Volume Control Position_Maximum Volume Generator Output_:_Minimum for Readable Indication TABLE 1, Alignment for Buick 980134, Chevrolet 988414, Chevrolet Corvair 988468 STEP SERIES CONDENSER OR | DUMMY ANT

5、ENNA CONNECT SIGNAL GENERATOR TO SIGNAL GENERATOR FREQUENCY TUNE RECEIVER TO ADJUST IN SEQUENCE FOR MAX OUTPUT l 0.1 Mfd. 12AD6 Grid (Pin #7) 262 KC High Frequency Stop A, B, D, C 2 .000082 Mfd. Antenna; Connector 1615 KC High Frequency Stop *E, F, G 3 .000082 Mfd. j Antenna Connector 600 KC Signal

6、Generator Signal J, K 4 .000082 Mfd. -Antenna Connector 1615 KC High Frequency Stop F, G 5 .000082 Mfd. Antenna Connector 1100 KC Signal Generator Signal L TABLE 2, Alignment for Oldsmobile 989392 and Pontiac Model 989693 STEPS SERIES CAPACITOR OR DUMMY ANTENNA CONNECT SIGNAL GENERATOR TO SIGNAL GEN

7、ERATOR FREQUENCY TUNE RECEIVER TO ADJUST IN SEQUENCE FOR MAX. OUTPUT l 0.1 Mfd. 12AD6 Grid (Pin #7) 262 KC High Frequency Stop A, B, C, D 2 0.000068 Mfd. Antenna Connector 1615 KC High Frequency Stop *E, F, G 3 0.000068 Mfd. Antenna Connector 600 KC Signal Generator Signal J, K 4 0.000068 Mfd. Anten

8、na Connector 1615 KC High Frequency Stop F, G 5 0.000068 Mfd. Antenna Connector 1100 KC Signal Generator Signal L* TABLE 3, Alignment for Buick 980132 and Oldsmobile Model 989387 STEPS SERIES CONDENSER OR DUMMY ANTENNA CONNECT SIGNAL GENERATOR TO SIGNAL GENERATOR FREQUENCY TUNE RECEIVER TO ADJUST IN

9、 SEQUENCE FOR MAX. OUTPUT l 0.1 Mfd. 12AD6 Grid (Pin #7) 262 KC High Frequency Stop A, B, D, C 2 .000082 Mfd. Antenna Connector 1615 KC High Frequency Stop *E, F, G 3 .000082 Mfd. Antenna Connector 600 KC Signal Generator Signal J, K 4 .000082 Mfd. Antenna Connector 1615KC High Frequency Stop F, G 5

10、 .000082 Mfd. Antenna Connector 900 KC Signal Generator Signal L* TABLE - 4, Alignment for Chevrolet Model 988413 STEPS SERIES CAPACITOR OR DUMMY ANTENNA CONNECT SIGNAL GENERATOR TO SIGNAL GENERATOR FREQUENCY TUNE RECEIVER TO ADJUST IN SEQUENCE FOR MAX. OUTPUT l 0.1 Mfd. 12AD6 Grid (Pin #7) 262 KC H

11、igh Frequency Stop A, B, C, D, 2 0.000082 Mfd. Antenna Connector 1615 KC High Frequency Stop *E, F, G, 3 0.000082 Mfd. Antenna Connector 600 KC Signal Generator Signal J, K 4 0.000082 Mfd. Antenna Connector 1615 KC High Frequency Stop F, G Before making this adjustment check mechanical setting of os

12、cillator core “H.” The rear of the core should be 15A from the mounting end of the coil form. (This measurement is readily made by inserting a suitable plug in the mounting end of the coil form.) Core adjustment should be made with a non-metallic screw driver. I, is the pointer adjustment screw whic

13、h is on the connecting link, between the pointer assembly and the parallel guide bar. It should be adjusted so that the dial pointer corresponds with the 1100 K.C. mark on the dial. *L is the pointer adjustment screw which is on the connecting link, between the pointer assembly and the parallel guid

14、e bar. It should be adjusted so that the dial pointer corresponds with the 900 KC mark on the dial. With the radio installed and the car antenna plugged in, adjust the antenna trimmer “G” for maximum volume with the radio tuned to a weak station between 600 and 1000 KC (see sticker on case.) 38 收音机爱 好者资料库 RadioFans.CN