3 Jul
2005
3 Jul
'05
8:20 p.m.
Thanks - it did. I followed the "AC"
through, and could see a nice waveform
coming out of the 2C driver, however from there it degraded to what I described
before at the C1 cap - on a hunch I replaced C1, and the voltage rose to about
That was my first guess too... Basically there shouldn't be significant
ripple here.
7v, and the display was readable, however it was also
flickering, and I could
see the voltage rising and falling by a couple of volts - I replaced C6 and
now it's rock solid, and the display is perfect.
Exvellent!
Next problem is that the microcassette drive appears to be "stuck" with the
heads
and capstan forward - not really stuck, as you can push them back on their spring,
however they are not retained back as they should be - prevents inserting and
removing tapes - I haven't opened it yet, but will shortly ... is there any useful
info about the drive machanics in the service manual? I assume there must be some
kind of solinoid and latch to hold them back and release them?
There's a little motor/gearbox to move the head, and I think a position
detelction swtich. I will check the manual for you. The technical manual
I have gives schematics for the cassette option, exploded views,
dismantling instructions, etc.
Once again: THANKS! for taking the time to "ascii art" the LCD power supply
schematic ... VERY much appreciated!
I'm pleased the machine is working again.
-tony