18 May
2009
18 May
'09
10:24 a.m.
Teo,
First check the solder joints for bad soldering like very good at all power
consuming components because due to temp./length variations the solders are
getting lose.
If the CRT isn't glowing you should also check the powersupply and the
hor.line-circuit.
Most time the switching transistor (you'll measure a shortcut between the
legs after you desoldered it) or a capacitor(elco) dies.
And please be carefull not all old monitors have a discharge resistor placed
over the high-voltage elco's.
-Rik
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] Namens Teo Zenios
Verzonden: maandag 18 mei 2009 12:02
Aan: General Discussion: On-Topic and Off-Topic Posts
Onderwerp: Problem with an old Tandy CM-4 monitor
A while ago I got a Tandy 1000 system with a CM-4 monitor.
The system worked fine for 20 minutes and then the monitor
died. So far I havn't seen anything that looks burnt on the
inside, but the tube doesn't light up when you provide power
and there is a crackling noise going on. Is there a common
issue with these old CGA monitors, and is this fixable
without gutting a working one?