projects:dslam
Differences
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projects:dslam [2024/04/05 11:19] – q3k | projects:dslam [2024/04/05 12:22] (current) – [FXS] q3k | ||
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</ | </ | ||
- | == FXS == | + | ==== FXS ==== |
We have a companion FXS rack device, Audio Codes MP-124D/ | We have a companion FXS rack device, Audio Codes MP-124D/ | ||
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=== PSU Recap === | === PSU Recap === | ||
- | The caps on the PSU (APSI-605AC Rev.C) are bad. Here's the values jotted down so that q3k can order some new ones: | + | The output smoothing |
- | * C9: 470uF 63V | + | ^ Refdes ^ Capacitance ^ Voltage ^ Diameter ^ Height ^ Lead spacing ^ Replacement ^ |
- | * C10: 470uF 63V | + | | C9, C10, C14 | 470uF | 63V | 16mm | 20mm | 7.5mm | EEU-FS1K471S | |
- | * C14: 470uF 63V | + | | C15, C17, | 220uF | 100V | 16mm | 25mm | 7.5mm | UHE2A221MHD6TN | |
- | | + | | C19, C20, C22 | 1200uF | 10V | 10mm | 20mm | 5mm | EEU-FS1E122B | |
- | * C17: 220uF 100V | + | |
- | 470uF/63V caps are 20mm tall, 16 mm diameter, 7mm leg pitch. 220uF/100V caps are 25mm tall, 16mm diameter, 7mm leg pitch. The board came with Nichicon branded caps. C19 is visible | + | C19 is bulged. C10 is burst. The rest look fine (after desoldering, |
- | There' | + | There' |
+ | |||
+ | === JTAG Pinout === | ||
+ | |||
+ | Refdes J8 ' | ||
+ | |||
+ | ^ Function ^ Pin ^ Pin ^ Function ^ | ||
+ | | Diode | 1 | 2 | Diode | | ||
+ | | Diode | 3 | 4 | GND | | ||
+ | | 3v3? | 5 | 6 | GND | | ||
+ | | Hi-Z | 7 | 8 | GND | | ||
+ | | Hi-Z | 9 | 10 | GND | | ||
+ | | Diode | 11 | 12 | GND | | ||
+ | | Hi-Z | 13 | 14 | Hi-Z | | ||
+ | | Hi-Z | 15 | 16 | Diode | | ||
+ | | Hi-Z | 17 | 18 | Hi-Z | | ||
+ | | Hi-Z | 19 | 20 | Hi-Z | | ||
+ | |||
+ | Diode means a diode was detected (0.3V-1.6V) from that pin to ground. Hi-z means there didn't seem to be a diode between that pin to ground. This looks like a custom JTAG connector, q3k will attempt to discover the pinout once the PSU is fixed. | ||
+ | |||
+ | There' |
projects/dslam.txt · Last modified: 2024/04/05 12:22 by q3k