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Author Topic: Question about power switch for Philips CM8833 Mk2 Monitor  (Read 3941 times)

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Online AndyFCTopic starter

Question about power switch for Philips CM8833 Mk2 Monitor
« on: November 15, 2020, 09:48:52 AM »
Hi all,
The power switch on the back of my monitor has finally failed and no longer stays in the 'On' position.

I've found the part number but suppliers are rare and the part is expensive so I'm thinking of other options to replace it (it would be nice to have a working switch instead of some of the workarounds I've read about) and hope I can get some help here on a couple of questions:
 - Does the switch need to take 240v or does it handle a lower voltage and activate a relay?
 - Is it a Double Pole Single Throw or a Single Pole Single Throw

Thank you.
A1200 in DIY Tower. 3.2 ROMs (softkicking 3.2.3), OS 3.2.3, CF card, CD RW and IDE to SD adapter running off the internal IDE port (using the A4000 4-port IDE adapter from Amigakit), Pistorm 32 lite with Pi4/2GB/Emu68 or Blizzard 1230-IV, with 32MB 60ns RAM and 50MHz 68882 FPU.
MorphOS on PowerMac G5 and ATI 9600 pro
 

Online AndyFCTopic starter

Re: Question about power switch for Philips CM8833 Mk2 Monitor
« Reply #1 on: November 16, 2020, 05:42:13 PM »
I've found one on ebay and I had a £5 off voucher to use so I didn't think £17 including delivery is too bad. I'll let you know how I get on with it and check the type of switch before I solder it in.
A1200 in DIY Tower. 3.2 ROMs (softkicking 3.2.3), OS 3.2.3, CF card, CD RW and IDE to SD adapter running off the internal IDE port (using the A4000 4-port IDE adapter from Amigakit), Pistorm 32 lite with Pi4/2GB/Emu68 or Blizzard 1230-IV, with 32MB 60ns RAM and 50MHz 68882 FPU.
MorphOS on PowerMac G5 and ATI 9600 pro
 

Online AndyFCTopic starter

Re: Question about power switch for Philips CM8833 Mk2 Monitor
« Reply #2 on: November 25, 2020, 05:42:06 PM »
The new switch arrived and so I've checked it and sharing here for others.

On the underside it's stamped 24v, 1A.

The following poles get connected when the switch is in the 'on' position:
Poles 1 and 2 on the photo (marked 1 and 1/1 on the switch)
Poles 3 and 4 on the photo (marked 2 and 2/1 on the switch)

It's also labelled with the part no GDE S40 which seems to be a much more common part number (this switch seems to be modified and has pins missing).

Soldering on Saturday :-)
A1200 in DIY Tower. 3.2 ROMs (softkicking 3.2.3), OS 3.2.3, CF card, CD RW and IDE to SD adapter running off the internal IDE port (using the A4000 4-port IDE adapter from Amigakit), Pistorm 32 lite with Pi4/2GB/Emu68 or Blizzard 1230-IV, with 32MB 60ns RAM and 50MHz 68882 FPU.
MorphOS on PowerMac G5 and ATI 9600 pro
 

Online AndyFCTopic starter

Re: Question about power switch for Philips CM8833 Mk2 Monitor
« Reply #3 on: December 01, 2020, 02:50:25 PM »
I thought I'd give this a go and fitted it. I've had the monitor on for 2 hours straight (well insulated with the cover off and a thermometer) and there's no increase in temperature on the switch above ambient room temperature.

I've read around and think the switch I bought had dual connectors and the ratings I put on here the other day are for the terminals which have been removed.

The other rating marked on the switch I bought is:
4/100
 250

The original part from the monitor is an ME5A TV3 switch and these come up in more searches than trying to identify the Philips part number or name.
This is marked
2.5/100
 250
A1200 in DIY Tower. 3.2 ROMs (softkicking 3.2.3), OS 3.2.3, CF card, CD RW and IDE to SD adapter running off the internal IDE port (using the A4000 4-port IDE adapter from Amigakit), Pistorm 32 lite with Pi4/2GB/Emu68 or Blizzard 1230-IV, with 32MB 60ns RAM and 50MHz 68882 FPU.
MorphOS on PowerMac G5 and ATI 9600 pro