-Kendall
On Monday, January 19, 2004, at 08:16 AM, Antonio Rodr�guez wrote:
Hi, Jessi. My replies follows quoted text.
Jessi ha escrito:
I have never opened a compact Mac, and I'm a bit scared of the voltage.
I would basically like advice on not hurting myself.
If you take a bit of care and know where you can't put your hand, you'll be
safe. When dealing with the motherboard you don't need to get near the high
voltage parts, and the SE/30 has an auto-discharge feture: just let it sit
down for a few minutes before cracking it open.
1. I see instructions here
http://www.biwa.ne.jp/~shamada/fullmac/repairEng.html#TakeApart
on discharging the CRT. Will I be okay, do you think, with the homemade
discharge tool mentioned of an allligator clip with a screwdriver?
I won't do that. It will get you nearer to the high voltages than you would
be otherwise. It is a lot safer to let it discharge alone.
2. The same page says
"The high voltage (1,500 Volts) on the anode of the CRT is supplied by
the flyback transformer on the analog board. Do not touch the flyback
transformer. Do not touch the yoke assembly, yoke cable/connector, high
voltage cable and anode connector, either." I know from the Apple
Service Manual picture what the yoke assembly is, but I don't know the
location or appearance of the high voltage cable, anode connector, or
flyback transformer (other than it being on the analog board) are. I'm
a little worried that I might touch them by accident! Anyone know of a
picture somewhere showing these items?
The high voltage cable is a pretty fat cable runing directly from a big
component on the motherboard to a suction pad on the tube. And the flyback
transformer and the anode connector are on the ends of that cable - the anode
connector is bellow the suction pad, and the flyback transformer is the big
component I said earlier. Porbably it's the biggest component of the SE/30's
analog board, except for the power supply itself.
Instead of the high voltage, I do think that the biggest danger you have when
dealing with an open compact is the fragility of the tube. Some of the
fellows of the list have heard the "hiss of death", a sound made by the
picture tube when it's broken and air enters into it making it unusable. Just
make sure not to touch the "video board" (the small ciruit board in the end
of the tube's neck), nor to get near it or do any movement that can hit it.
3. Then I'm supposed to "Check and clean connections between SIMMs (ROM-SIMM) and SIMM (ROM-SIMM) slots". How do I clean the connections, can anyone tell me? Some special cleaning substance? Friction? Rubbing or scrubbing something?
Just take the SIMM out, rub its contacts with a eraser and clean the shavings. Repeat that with the RAM SIMMs - it can't do any harm.
And, gee, I might as well acquire an ethernet card I can install while I'm at it, and replace the battery too. 4. Anyone know where I should look for a battery? Radio Shack,...?
The better way is to take the battery out and carry it to your local electronics shop and ask for another one like it ;-) .
Thanks for all your help,
You're wellcome!
Greetings,
Antonio Rodr�guez (Grijan) <ftp://grijan.cjb.net:21000/>
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