amiga_1081_monitor_repair
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amiga_1081_monitor_repair [2021/07/13 05:34] sausage |
amiga_1081_monitor_repair [2021/07/13 06:56] (current) sausage |
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| NTSC is noted on the board, but for PAL, the resistor must be slightly moved into the next position on the PCB. | NTSC is noted on the board, but for PAL, the resistor must be slightly moved into the next position on the PCB. | ||
| R232 PAL is 12V one side and 11.7V the other. So that's probably why pin 11 on IC 502 shows nothing because PAL in connected and NTSC is disconnected. They have separate circuits bridged by the R232 safety resistor. | R232 PAL is 12V one side and 11.7V the other. So that's probably why pin 11 on IC 502 shows nothing because PAL in connected and NTSC is disconnected. They have separate circuits bridged by the R232 safety resistor. | ||
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| + | In the image below, the orange line is where the R232 is placed for NTSC, and the blue is where the R232 is placed for PAL. | ||
| {{ :repairs:1081:r232-positions.jpg?direct |}} | {{ :repairs:1081:r232-positions.jpg?direct |}} | ||
amiga_1081_monitor_repair.txt ยท Last modified: 2021/07/13 06:56 by sausage
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