Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!think.com!spool.mu.edu!cs.umn.edu!msi.umn.edu!math.fu-berlin.de!unidui!unido!mcshh!abqhh!drdhh!bjoern
From: bjoern@drdhh.hanse.de (Bjoern Kriews)
Newsgroups: comp.sys.atari.st.tech
Subject: Re: Need help with bad RS232 port
Message-ID: <2910.04.91@drdhh.hanse.de>
Date: 25 Apr 91 15:25:08 GMT
Article-I.D.: drdhh.2910.04.91
References: <14371@ccncsu.ColoState.EDU>
Organization: Digital Island
Lines: 20

From article <14371@ccncsu.ColoState.EDU>, by sytang@lamar.ColoState.EDU (Shoou-yu tang):
>  My 1040ST has a bad RS232 port and I'm trying to fix it, when nothing connected
>  to the RS232 port it works fine. But when a working modem connected to the port
>  the screen on the mono monitor got distored in some part. And the Uniterm would
>  hung up the whole machine when try to dail out. 
>  (NOTE: Uniterm and modem are working correct and has try with another ST with
>  exact same configuration).
>  Is it the 1488 or 1489 went bad? OR the Sound chip? Any hints?

First guess: 1488 (output driver)

Anyway, the both 14xx are easier to replace than the YM-2149 and
cost nearly nothing.

Greetings, Bjoern


---
bjoern@drdhh.hanse.de = Bjoern Kriews / Stormsweg 6 / 2000 Hamburg 76 / FRG
"gaaga mahwe Bjoern urgl ufzae Turbo-C bnub"     (J. Willamowius)