Ford-Motor-Car-Co-FEG-18806G 电路原理图.pdf

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1、8V01T AT POINT A PLATE Of I2K5 VOLUME R-17, MOST e = rsi NEEDED 1957 RADIO SERVICING INFORMATION I i* 1“- 09 I n gi i TJC 2 S* MOTOROLA INC. AUTO RADIO MOTOROLA 78MF FORD FEG-18806-G (Alignment information is on the next page adjacent at right) afli: OCCfC qiOEJws ; J |W oeo a l I1M T Ott 018 upw Gh

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4、 c *4 4-30 4, y O. S C c 4) M +S 3 IA h * 8*1ol 3 # 3 y w u oje 4 -r B it V O 4 70 (Alignment data on the next page) dummy ahtenna detail core alighmeht tool detail 收音机爱 好者资料库 RadioFans.CN MOTOROLA 78MF, FORD FEG-18806-G, ALIGNMENT INFORMATION (Continued) RF ALIGNMENT Antenna recept thru d vim my VO

5、LUME R-17, MOST-OFTEN-NEEDED 1957 RADIO SERVICING INFORMATION tCreHeCt AVC J*”10 8r chassis). Set volume to minimum and tone to treble. Attenuate signal generator to maintain VTVM reading between 1. 5 and 2 volts. STEP GENERATOR CONNECTION GENERATOR FREQUENCY (400 cycle mod) TUNER SET TO ADJUST Hi e

6、nd stop Adjust for maximum. 7. Repeat steps 5 & 6 until no further increase, then cement cores in place. Step No. 6 should be last adjustment. SENSITIVITY CONTROLS 8. I Antenna recept I thru dummy (see I Figure) 1000 Kc at 5 microvolts 1000 Kc at 100 microvolts ANTENNA TRIMMER ADJUSTMENT 10. I I Tun

7、e for max Tune for max Weak station around 1400 Kc Adjust for 1. 79 volts output. (Connect output meter across voice coil and set volume control to maximum). Short case of R13 to chassis. Adjust for 1. 79 volts output. (Connect output meter across voice coil and set volume control to maximum). Adjus

8、t for maximum with radio installed in car and antenna fully extended. Adjust for dip. Hi end stop Adjust for maximum. NOTE: Do not perform steps 4, 5, 6 & 7 unless the tuner has been tampered with or components have been replaced. Before proceeding with step 4, back tuning cores 1-3/8 out of tuning coils to eliminate their effect on trimmer adjustment. Antenna recept thru dummy Hi end stop Adjust for maximum. 49/64 from hi end stop Adjust for maximum. IF ALIGNMENT 1. I 12AD6 conv, grid I (pin 7) thru . 1 mf I & chassis 262.5 Kc Hi end stop Adjust for maximum. wm 收音机爱 好者资料库 RadioFans.CN