Ford-Motor-Car-Co-FDR-18806F 电路原理图.pdf

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1、VOLUME R-16, MOST-OFTEN-NEEDED 1956 RADIO SERVICING INFORMATION AUTO RADIO MOTOROLA 69MF MOTOROLA (For alignment information see the next page, adjacent at right.) FORD FDR-18806-F I 5 ft I S m a I I 9ta tc II * X o w *c v v O o o d (Q P * 0 S 2 t, oo c IS c m 3J w -O P c u V ,*3 u 0 2 .S5 2 5cj - 0

2、 g I o * E *3 H w d v oo v 2 o* S .5 S a 2 .3 - V V 3 c a v aS ! g 2 “ c s t p p .a g rt 2 d 3 -O o *- X l - 0 *o i, .5 +5 v - o- 1 rC 4M ; si O - 1 d v -o 3 rt v _ u c c w js i!co*drt v rt c u rt u u a d c u o v H J d x a a a X3 a o +- a a a c bo SERVICE NOTES RadioA lead must be connected to the p

3、ositive (+) side of power source at all times; radio and tuner will not func tion properly if connected otherwise. TO REPLACE DEFECTIVE MANUAL TUNING SHAFT 1. Remove escutcheon. 2. Remove roll pin from manual tuning shaft. 3. Remove defective manual tuning shaft. 4. Replace new manual tuning shaft u

4、sing the new roll pin provided with the shaft. TO REPLACE DEFECTIVE VOLUME CONTROL 1. Remove bottom cover and escutcheon 2. Remove relay (it is not necessary to unsolder relay wires). 3. Unsolder four wires from the switch. 4. Remove volume control mounting clip. 5. Rotate volume control about 30 cl

5、ockwise and pull out. 6. Replace new volume control in opposite manner. 96 收音机爱 好者资料库 RadioFans.CN VOLUME R-16 MOST-OFTEN-NEEDED 1956 RADIO SERVICING INFORMATION MOTOROLA Auto Radio 69MF, Ford FDR-18806-F Alignment Information, Circuit diagram is on pre ceding page adjacent at left. POINTER ADJUSTME

6、NT CAM DUMMY ANTENNA DETAIL 1/6 thick WOOD STR P COIL TUNING- CORE ANT RECEPT CORE ALIGNMENT TOOL DETAIL ALIGNMENT ADJUSTMENT LOCATION DETAIL ALIGNMENT Connect a VTVM from the AVC line to ground. Set volume to minimum and tone to treble. Attenuate signal generator to maintain VTVM reading between 1.

7、 5 and 2 volts. GENERATOR GENERATOR STEP CONNECTION FREQUENCY TUNER SET TO ADJUST REMARKS IF ALIGNMENT 1. 12BE6 grid (pin 7) 265 Kc Hi end stop 2, 3, 4, Adjust for maximum, thru 1 mf b chassis 2. 265 Kc Hi end stop 1 Adjust for dip. RF ALIGNMENT - NOTE: Back tuning cores completely out of coils befo

8、re proceeding. 3. Ant recept thru 1610 Kc Hi end stop 5, 6, 7 Adjust for maximum, dummy. See Fig. 4. 1020 Kc 49/64 from hi 8, 9, 10 Adjust for maximum end stop 5. Repeat steps 3 Sc 4 until no further increase, then cement cores in place. output meter across speaker voice coil. Tune for max I R13 j A

9、djust for 1.79 volts (1 watt output) Tune for max R15 Turn set off. Depress and release TOWN button (left side). Turn set on. Open contact B2 by inserting insulation (paper) between contacts on relay E4 and adjust for 1. 79 volts output. Weak station 7 Adjust for maximum with radio in around 1400 Kc

10、 car. Antenna should be fully ex tended. Tune radio to 1000 Kc signal and adjust the pointer adjusting cam (see Alignment photo) until the pointer lines up with the calibration mark on the dial background. SENSITIVITY CONTROLS - NOTE: Connect aj 6. Ant recept thru 1000 Kc at 5 dummy. See Fig. microvolts 7. 1000 Kc at 100 microvolts ANT TRIMMER ADJ 8. POINTER CALIBRATION 97 收音机爱 好者资料库 RadioFans.CN