United-Motors-Service-Delco-988468 电路原理图.pdf

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1、VOLUME R-21, MOST-OFTEN SERVICING INFORMATION DELCO CHEVROLET CORVAIR 988468 Alignment in Table 1, Page 38 BOTTOM VIEW T I fcl U TUBE VIEW Dll liiiiiimll 3i oil ill m i Voltages measured terminal to chassis with a VTVMNo signal and 12.0 volts at Ulus. 27 1 Oscillator grid voltage taken I with set tu

2、ned to 1000 KC. :9 Total “A” drain at 12V. - 1.6 amps, f Tolerance on voltages 10% Indicates lead from tuner coil assy- fBefore measuring transistor voltages, the shorting type speaker socket must be opened and a 4 ohm speaker connected, if transistor is replaced, adjust bias poten tiometer (Ulus. 5

3、8) to obtain proper col- : lector voltage with 12 volts input to radio, fjUlus. 49 is a fuse resistor for the tran sistor. Service with exact replacement. CHEVROLET CORVAIR 988468 DS903 OUTPUT warn Tn TO FUSE BLOCK HEATERS .33- PRINTED CIRCUIT SHOWN IN HEAVY UNES. 35 收音机爱 好者资料库 RadioFans.CN VOLUME R

4、-21, MOST-OFTEN-NEEDED 1961 RADIO SERVICING INFORMATION OLDSMOBILE MODEL 989392 Alignment in Table 2, Page 38 . L_ TUK VICWl H- TUBE VIEW I2DZ6 R.F. AMP. I2AD6 OSC-MOO s 48 e c 5C 3 1 17 ll c ann 57 gga be I 25 I I2EK6 I, F AMP. PARTS VIEW I2DS7 AUD.-DET ts; 7ZJ A. 58 p-WA- J 39 MEG EH -vw* 3.3 MEG.

5、 Jg VOLTAGES MEASURED TERMINAL TO CHASSIS WITH A VTVM-NO SIGNAL AND 12.0 VOLTS AT ILLUS. 32. OSCILLATOR GRID VOLTAGE TAKEN WITH SET TUNED TO 1000 KC. TOTAL A DRAIN AT 12V.-2.4 AMPS. TOLERANCE ON VOLTAGES 10V. COLLECTOR CURRENT tic) 1050 M.A. -INDICATES LEAD FROM TUNER COIL ASSY. -BEFORE MEASURING TR

6、ANSISTOR VOLTAGES, THE SHORTING TYPE SPEAKER SOCKET MUST 8E OPENED AND A 4 OHM SPEAKER CONNECTED. IF TRANSISTOR IS REPLACED. ADJUST 8IAS POTENTIOMETER IILLUS. 67) TO OBTAIN PROPER COLLECTOR VOLTAGE WITH 12 VOLTS INPUT TORADIO. +-ILLUS. 57 IS A FUSE RESISTOR FOR THETRANSISTOR. SERVICE WITH EXACTEPLAC

7、EMENT. A-WILL NOT APPEAR IN ALL RADIOS A A-.33 OHM MUST BE USED WHEN ILLUS. 34 IS NOT PRESENT. l L 48 3.9 MEG 820K 00000 m 1% |400 03) *6% MA TO LEAD HEATERS LIJ L iT2 m m, _.li_j isiooo OLDSMOBILE 989392-PRINTED CIRCUIT SHOWN IN HEAVY LINES 36 收音机爱 好者资料库 RadioFans.CN VOLUME R-21, MOST-OFTEN-NEEDED

8、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 10% *Indicates lead from tuner

9、 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. 59 is a fuse resistor for the

10、 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-Across Voice Coil Generator Retur

11、n_-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 ANTENNA CONNECT SIGNAL GENERATOR T

12、O 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 Generator Signal J, K 4 .000082

13、 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 GENERATOR FREQUENCY TUNE RECEIVER

14、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. Antenna Connector 1615 KC High Frequ

15、ency 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 SEQUENCE FOR MAX. OUTPUT l 0.1

16、 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 .000082 Mfd. Antenna Connector

17、 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 High Frequency Stop A, B, C, D,

18、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 oscillator core “H.” The rear of

19、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 which is on the connecting link, be

20、tween 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 guide 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