| Electronics > Repair |
| Yamaha RX-V473 repair. PS3 PRT: 094L [SOLVED] |
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| wasedadoc:
The base of Q206 goes to the junction of the top two resistors in the three resistor chain to the above left. If the voltage at that point is low it will pull down the LMT-PS3 line. |
| Comp_Sci_hater:
Re:wasedadoc Can you dumb it down a bit for me? So when the voltage is too low the transistor opens and drains all the voltage to ground? Why is the PL3.0 there? |
| Comp_Sci_hater:
UPDATE: The self monitor function reacts when i short pins 106 and 105 together, it goes down from 094 to 000. The measurments still show steady 1.96V with almost no ripple (check photo). Also, pin 106 of the CPU is always at 1.96V, even without pressing the power button. Is that normal? |
| David_AVD:
--- Quote from: wasedadoc on September 05, 2024, 08:54:19 am --- --- Quote from: David_AVD on September 05, 2024, 08:32:09 am ---Check that the sense resistors are still their correct values. --- End quote --- Seems you did not read and understand everything the OP wrote. --- End quote --- Can you expand on that? He said there's a PS3 error and I said to check the sense resistors. I probably should have specified I meant the ones associated with the PS3 line sensing? |
| wasedadoc:
--- Quote from: David_AVD on September 05, 2024, 08:39:46 pm --- --- Quote from: wasedadoc on September 05, 2024, 08:54:19 am --- --- Quote from: David_AVD on September 05, 2024, 08:32:09 am ---Check that the sense resistors are still their correct values. --- End quote --- Seems you did not read and understand everything the OP wrote. --- End quote --- Can you expand on that? He said there's a PS3 error and I said to check the sense resistors. I probably should have specified I meant the ones associated with the PS3 line sensing? --- End quote --- The OP stated he calculated the expected voltage from the voltage divider. I also got the same result as he provided. He measured the voltage and it was extremely close to the calculated value. |
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