domingo, 12 de julho de 2015

Sony ICF-SW7600GR Multi Band World Receiver Radio

An icon among the amateur radio...









 Step by step disassembly.

Remove the 5 start screws in the back.
The back and front covers are free to be removed by gently push the four plastic claws on the back cover.


The chassis - back side.



The chassis - front side.
The plastic keyboard key assembly was removed by pulling it out, leaving the key switches visible.



The chassis - front side detail.
Back supply capacitor: 2200uF / 5.5V. It is enough to maintain the clock operation for at least one minute while replacing the AA batteries.



8 Ohm / 0.5Watt Loudspeaker removed and terminal wires unsoldered.
It is secured by two plastic claws.



Key Board assembly removed from the front side of the plastic chassis frame.
The board is secured by two plastic claws.
Gently pull the flat cable from the connector.



 Plastic chassis frame - Front side ( Key Board assembly was removed).
 The flat cable interconnecting the Main board and the Key Board is visible in the central zone.



  Plastic chassis frame - Back side ( Key Board and Main Board assemblies were removed)



Main Board assembly removed from the back side of the plastic chassis frame.
It is secured in place by four plastic claws. Push them gently to remove the board. 



Main Board assembly detail - right side.
"X201" 55.390MHz AM OSC2 crystal visible in the central zone.
"IC203" CXA1522 Pre/Power audio amplifier IC in central bottom zone. 



 Main Board assembly detail - left side.



Main Board assembly detail.
"XF101" AM IF1 55.845MHz filter in first plane.



Exploded view.
After reassembling, the radio worked as nicely as before.






Sem comentários:

Publicar um comentário