Forum upgraded to SMF 2.1.2!
Started by SemiConductive, May 03, 2022, 04:43:03 PM
Quote from: Enzo on May 03, 2022, 06:25:25 PMI can't read yours, but I have the G100-3, which looks the same other than power.May I suggest, just unplug the speakers? The schematic and parts layout shows the speakers plugging into the rear panel jack.
Quote from: g1 on May 04, 2022, 12:55:00 PMEnzo's approach would be the simplest. But if you really want to automate it, there is already a relay engaging the speakers, you could just toggle that.The type of switching jack you mean is probably with 'isolated' switch.The switch could replace the connection between D112/C183 junction and R1998/R198 junction.I believe that would leave the protection function via pin2 of IC111 enabled.Full service manual attached.
Quote from: SemiConductive on May 04, 2022, 03:58:20 PMWhat's the function of IC111 i.e. what fault is it protecting against?
Quote from: SemiConductive on May 04, 2022, 09:26:37 PMSlightly OT: For you guys who can't read the schematic I posted... did you click on the graphic once you got there to zoom it? Inquiring minds want to know (so I can plan better next time if needed).
Quote from: g1 on May 05, 2022, 03:00:11 PMQuote from: SemiConductive on May 04, 2022, 03:58:20 PMWhat's the function of IC111 i.e. what fault is it protecting against?It senses DC at the output and kicks out the relay to protect the speaker. It's also supposed to be able to prevent over-current but I'm not sure if that function is being used. (see datasheet attached)