antunes@ASTRO.PSU.EDU (Alex Antunes) (10/04/89)
Hello! My A501 512K memory board for my A500 has a problem. Although the memory is fine, for some reason the clock doesn't work. When I use Workbench 1.3, it says "battery backed-up clock not found". When I use Workbench 1.2, it says "battery backed-up clock not functional" I took it to my local repair place, but they said there aren't any schematics for it so they couldn't fix it. Any suggestions? I checked the battery and it's fine, with 1.2 it finds the clock so adjusting the pot capacitor didn't help, I'm pretty clueless at this point! Any e-mail help is appreciated! Alex Antunes "the Waupelani Kid" 'cause that's where I live... antunes@astro.psu.edu
rayl%cyclone@Sun.COM (Ray Lamoreaux) (10/07/89)
; ; > Workbench 1.2, it says "battery backed-up clock not functional" I took > it to my local repair place, but they said there aren't any schematics for ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > it so they couldn't fix it. Any suggestions? I checked the battery and ^^^^^^^^^^^^^^^^^^^^^^^^^^ Try looking in Appendix F of the A500 Manual (Introduction to the AMIGA 500). Page F-11 has a schematic of a 512k expansion ram card with a battery backed up clock (looks a lot like an A501 schematic to me). In fact, I used this schematic to build my own 512k memory expansion. (haven't built the clock circuit yet though). I warn you however, that the schematics im my A500 manual (copyright 1987) are not entirely accurate. (at least they do not exactly match the circuitry in the A500 which the manual came with) -Ray