Archived from groups: comp.sys.ibm.pc.hardware.video (
More info?)
Hi, I just saw the previous posts about this monitor and wanted to
offer some help...
I also bought the same monitor from eBay, and just received it
yesterday (Thursday 16th Sept). My hobby is in electronics, so I did
a bit of testing on the monitor, and it does indeed recieve it's
power through the 15-pin VGA connector. (I was as surprised as anyone
else ! ;-)
The pinout I've traced so far is as follows; any signals with a
question mark (?) after it are assumed to be right (as it looks like
it uses the same input pins as a standard VGA connector)...
1. Red ?
2. Green ?
3. Blue ?
4. NC ? (reserved)
5. GND
6. GND (Red Return)
7. GND (Green Return)
8. GND (Blue Return)
9. NC ?
10. GND
11. +V Power IN
12. +V Power IN
13. Horizontal Sync ?
14. Vertical Sync ?
15. NC ?
Notes: The connector shield is also grounded. Pins 11 and 12 are
usually ID0 and ID1, so please make sure they are NOT also connected
to graphics card when monitor is powered !
The ID pins are usually grounded in different combinations on
monitors, to tell the graphics card which type of monitor is
connected. I think you just need to ground ID0 (on the graphics card
side) to set the monitor type to standard colour.
Pin 9 on the graphics card is +5 Volts (VESA standard) but limited
current, as Bob Myers explained, so you shouldn't use it to power the
monitor. (You also really need a power supply of between 8-12
Volts).
This monitor uses a Linear Technology LT1117-5 adjustable voltage
regulator IC. Inside the monitor, the ADJ pin of this IC is grounded,
which basically means the output is set a 5 Volts for the monitor's
internals.
The regulator can take a maximum input voltage of 15 Volts. So all you
need to do is buy a VGA extension cable and a nice regulated power
supply (between 8-12 Volts). Strip the insulation off the VGA cable
somewhere (I'd recommended nearer the graphics card, to keep it
tidier), then splice the power supply wires into the VGA cable on the
correct wires.
You need to find which colour wires inside the VGA cable correspond to
which pins on the connectors. Please MAKE SURE you ISOLATE pins 11
and 12 on the graphics card side from the power supply.
The rest of the signals look like standard VGA, although I'm still
waiting for a VGA cable so I can try it properly.
I have actually powered up my monitor using a 11V (1 Amp) power
supply. The monitor "beeps" twice, the backlight flashes on, then
flashes off again. It looks like it's working fine, but needs a VGA
signal to stay powered on.
The regulator inside the monitor also supplies a maximum of 800ma. The
monitor is likely to only use a fraction of that. So you should be
alright with a 1 to 1.5 Amp power supply.
Hope that helps, sorry for the long boring post. I'll update you when
I've tried the monitor fully.
P.S. The (EXTREMELY HEAVY) stand for the monitor is labled...
BLOOMBERG L. P.
330 WEST STREET
NEW YORK, N. Y. 10014.
God knows how it made it over here to me in the UK !