Dear all o have an akai AJ480fs tape recorder with 4 band radio .I bought it from a vintage collector .unfortunately the radio not working kindly help me with schematic diagram or some ideas .The radio Circuit is a bit confusing with its power supply.
A 220mf electrolytic cap is connected with 220 ohm resistor from a zener diode connected from 12 volt dc through 100ohm resistor the zener is grounded .but the +ve and -ve terminals of the cap is shorted with looping ground of mainboard .so when ever I am connect all cables across the cap no dc bias .when I checking with meter it's shows grounded .all the caps are tested ok
Kindly help
🙏
A 220mf electrolytic cap is connected with 220 ohm resistor from a zener diode connected from 12 volt dc through 100ohm resistor the zener is grounded .but the +ve and -ve terminals of the cap is shorted with looping ground of mainboard .so when ever I am connect all cables across the cap no dc bias .when I checking with meter it's shows grounded .all the caps are tested ok
Kindly help
🙏
