I found this online (service manual for Ball Brothers video monitor). At the end of the document is a schematic, and you can see the pinout numbers (for the 10-pin card-edge connector) called-out on the schematic. For example, pins 1 and 10 are GND, 2,3, and 4 are for the external brightness control.
I used to test/repair terminals, printers, and small-business computers as a summer job, and encountered several video monitors from different manufacturers with this same pinout. http://www.bitsavers.org/pdf/ballBrothers/5-017-1017B_Ball_TTL_Series_Service_Manual_Oct76.pdf On Saturday, April 22, 2023 at 8:24:45 AM UTC-7 gregebert wrote: > There was a standard 10-pin interface on video monitors back in the > 1980's, so you probably have that. I know the video, vert-sync, and horiz > sync were on the connector. Check pin 7; I recall that was for power and > usually had a fuse on the PCB board. You should be able to find a pinout on > the web. > > On Saturday, April 22, 2023 at 4:29:26 AM UTC-7 Paolo Cravero wrote: > >> Hello. >> A friend gave me a 12" monochrome CRT with its circuits that was taken >> off an injection molding machine (most likely from the control console >> Sandretto Selec 90). As I haven't been able to find documentation I started >> reversing the circuit to understand the meaning of the 10 pins on the card >> edge connector. >> >> There is the PSU, the HV generator and two ICs TDA1175P (vertical >> deflection) and TDA1180P (horizontal processor). I write here in hope >> someone was into these circuits and can help me understand what I need to >> get it working. >> >> Checks completed so far: fuses don't blow, CRT filament glows, there's a >> 14 kHz whine (I cheated using an audio spectrum App), 12Vdc is present. >> Nothing on screen. >> >> The closest documentation I could find is this service manual >> http://oz1db.dk/hp/omnivision_man_lp06xx_rev0_0611.pdf, however I'm >> missing something. >> >> The 10-pin connector has 3x GND, 1x 12Vdc (output), the 3 contacts for >> (what I think is) the remote brightness control, 1x not connected. I am >> left with one contact going to a 2N2222 which should be "video input" and >> another going to the TDA1180P horizontal processor. Where is the VSYNC >> input? Not needed? >> >> I've assembled an Arduino with the TVout library and got no reaction from >> the CRT both with just the [video signal] and [video signal + TVout sync >> output to the contact going to the TDA1180P]. The only difference between >> the two input configurations is that when I add the sync signal I hear a >> very low frequency buzz coming out of the screen circuits. I haven't been >> lucky enough to find a schematic diagram with both these ICs and just one >> sync input, and I've finished my guesses. >> >> I wonder if someone in this great community has experience with this >> circuit configuration and can suggest what kind of signals it is expecting. >> Also, should it show something with no input signal, or at least some >> noise? I know the dangers of EHT and I would try all low-voltage checks >> first. >> >> Thank you, >> Paolo >> >> -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/717987f7-c1d2-4c8a-9f58-d27d769952cfn%40googlegroups.com.
