LF: Epson HX-20 service info

[Tony Duell]

> 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