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a96110 Bob Green 2026-07-01 10:25:29
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# ACRTC-3
850048 Bob Green 2026-09-14 08:58:52
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e77e3d Bob Green 2026-09-14 09:15:25
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## Board Mods
5c46e2 Bob Green 2026-09-14 09:01:34
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On the v1.0 ACRTC-3 board, some tweaks are required to the board:
10c0f2 Bob Green 2026-09-14 09:12:31
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- Omit IC9 completely and install only two jumpers into the header as shown:
ac2aae Bob Green 2026-09-14 09:54:03
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123072 Bob Green 2026-09-14 09:53:41
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![image-1789372881976.png](./image-1789372881976.png?thumbnail=400)
ac2aae Bob Green 2026-09-14 09:54:03
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3e3eff Bob Green 2026-09-14 09:04:13
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- Add the three wire links as shown:
10c0f2 Bob Green 2026-09-14 09:12:31
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ba8cb7 Bob Green 2026-09-14 09:55:56
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![image-1789372956960.png](./image-1789372956960.png)
10c0f2 Bob Green 2026-09-14 09:12:31
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78fc6f Bob Green 2026-09-14 09:15:07
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Note, in conversation with Steve at Mega Micros, it seems that the mods outlined above do not play nicely with all monitors. If this is the case, then an adapter board with an appropriately programmed ATF750C device can be installed in IC9's socket. I've nearly finished building my board so will update this page once I've done that.
10c0f2 Bob Green 2026-09-14 09:12:31
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123072 Bob Green 2026-09-14 09:53:41
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![ic9.png](./ic9.png?thumbnail=400)
10c0f2 Bob Green 2026-09-14 09:12:31
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3cb361 Bob Green 2026-09-14 08:56:15
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## Attachments
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- [schematic.pdf](./schematic.pdf)
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- [bom.pdf](./bom.pdf)
d2806a Bob Green 2026-09-14 09:57:46
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- [HD63484 User Manual](./HD63484_User_Manual.pdf)