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- Date: Wed, 1 Feb 1995 02:17:01 -0600
- From: kuiyu@MAIL.UTEXAS.EDU (Kui-yu Chang)
- Subject: apple-13in-monitor-fix.txt
-
- Hi,
-
- This is the 2nd revised version of
-
- /info/hdwr/apple-13in-monitor-fix.txt
-
- with
- - additional contact tel nos
- - instructions(order#,part#) to correctly request the part
- from CCS
- (sometimes the person at CCS doesn't know about the part)
-
- Thank you!
-
- Sincerely yours,
- CHANG, Kui Yu (Julian)
- ----------------------------------- Cut here -----------------------------------
- Document : apple-13in-monitor-fix.txt
- Revision : 2
- Date : 31 Jan 1995
-
- composer : kuiyu@mail.utexas.edu
- CHANG, Kui Yu (Julian)
-
-
- 1 MONITOR
- ----------
- AppleColor 13" High-Resolution RGB monitor
-
- 2 PROBLEM
- ----------
- Powers itself off sporadically, green power light goes off with switch still
- stuck at 'ON' position.
-
- 3 SOLUTION 1
- -------------
- Adjust the variable resistor on the _back_ panel of the unit.
-
- DETAILS
-
- - On older models, this is simply the topmost control with a
- "mini-sun" icon beside it.
- - On newer models, this is accessible only after removing the
- case. This resistor is labelled "Cut-Off".
-
- The picture brightness level will vary with your adjustments.
-
- COMMENTS
-
- Normally, this solution only works if the problem was caused by a prior over-
- adjustment of this particular control/resistor. My experience with a working
- monitor is that if this brightness setting exceeds a threshold, the monitor will
- power off automatically. Resetting it to a normal level solves the problem.
-
- For my case, this was not the cause and thus SOLUTION 1 did not work.
-
- 4 SOLUTION 2
- -------------
- Replace the High voltage resistor.
- (the 'RED' block, to be called the 'block'henceforth)
- This is the big(about size of 2 cigarette boxes piled), red block sitting on the
- bottom shield, with 2 suction wires attached _and_ 2 wires soldered to it.
- On it is the part no. 1-230-666-21.
- One of the suction wires leads to a suction cap on the CRT(Cathode Ray Tube)
-