10-12-2013, 07:08 PM
(This post was last modified: 10-12-2013, 07:21 PM by Robert Darwent.)
You've sparked my interest, so I've just delved into my non-working set to see if I can remove the main PCB.
I can confirm it is necessary to take of the two dial cords as they sit on spindles moulded into the case, without them out of the way it is impossible to lift the PCB. However, its not as bad as it looks;
Take off the top cord first at the spring end, it unwraps from around the large pulley anti-clockwise one and half turns, then goes around the pivot at roughly ten o'clock, and unwraps a further two turns anti-clockwise from around the small pulley before going back to the looped end point via the pivot at roughly one o'clock.
The bottom cord is longer and just unwraps one and half turns anti-clockwise from the pulley at the spring end, then a couple of anti-clockwise turns from the other pulley before going back to the looped end point. No pivots involved with this cord.
The main PCB has three ribbon cables connecting it to the bank of push switches. This bank is attached with four screws which are impossible to access as the main PCB only lifts an inch or so because of being attached to the switches - getting a screwdriver in there is a no-go.
The only way I can see to release the main PCB is to unsolder all three ribbon cables, get everything out of the case, then reattach to work on - clearly whoever designed this set intended for it to be thrown away rather than repaired if anything went wrong!
As expected, the DAB module is a separate board fitted on to small stand-offs and mounted on the main PCB near the battery box, lower right - frustratingly close, but inaccessible at present!
I'll report back when I've made further progress.
Regards
I can confirm it is necessary to take of the two dial cords as they sit on spindles moulded into the case, without them out of the way it is impossible to lift the PCB. However, its not as bad as it looks;
Take off the top cord first at the spring end, it unwraps from around the large pulley anti-clockwise one and half turns, then goes around the pivot at roughly ten o'clock, and unwraps a further two turns anti-clockwise from around the small pulley before going back to the looped end point via the pivot at roughly one o'clock.
The bottom cord is longer and just unwraps one and half turns anti-clockwise from the pulley at the spring end, then a couple of anti-clockwise turns from the other pulley before going back to the looped end point. No pivots involved with this cord.
The main PCB has three ribbon cables connecting it to the bank of push switches. This bank is attached with four screws which are impossible to access as the main PCB only lifts an inch or so because of being attached to the switches - getting a screwdriver in there is a no-go.
The only way I can see to release the main PCB is to unsolder all three ribbon cables, get everything out of the case, then reattach to work on - clearly whoever designed this set intended for it to be thrown away rather than repaired if anything went wrong!
As expected, the DAB module is a separate board fitted on to small stand-offs and mounted on the main PCB near the battery box, lower right - frustratingly close, but inaccessible at present!
I'll report back when I've made further progress.
Regards
