SkaziChris
Member
Yes, those are all the relevant RSX voltage lines we were measuring off the board. Only now, we will be measuring them on the board to see if the ohm test's match up to what's expected. But that presents an issue. What's expected? Now that it's soldered on the board, those measurements will read different, due to parasitic inductance and resistance in the entire line.
This is why we need a working VER-001 to compare with. And other MB revisions for the matter.
BTW, I'm going to revise that picture to include some more of the CPU voltages. Thanks to @marciolsf's suggestion I look at IBM's Hardware Installation Guide for the 65nm Cell I have learned a TON more about the CPU, and incidentally about the RSX. It has to be something that affects the HDMI transmitter, but doesn't affect the Power On Reset or FlexIO Calibration (BitTraining). So that should rule out major voltages and solderballs/bumps.
IDK how useful this is to a VER-001, but for a COK-001 the following are required for HDMI Transmitter to work...
Well, you get the idea...
- +1.5V_RSX_VDDIO, +5V_ANA, +3.3V_ANA, and +1.8V_ANA are making it to the Chip
- +5V_ANA is making it to the Level Shifter (IC2501) and that it is recieving and shifting 1.5V <--> 3.3V for the folowing signals.
- RS_SPD0 --[1.5V]--> IC2501 --[3.3V]--> RS_SPD0_33
- /HDMI_INI --[3.3v]--> I assume SYSCON.
- HDMI is powered and ready to be configured.
- TH2501 is not blown
- None of the Zener Diodes are Short
- None of the Varistors are Short
- None of the Caps are short
- Induction Filters are not Short diagonally across themselves.
- Q2502, Q2504, and Q2507 are not short.
- R2520 & R2523 are not short or the SYSCON cannot communicate with the HDMI transmitter over I2C.
- FB2501, FB2503, & FB2504 are not blown.
- R2502 Isn't blown or HDMI Reset wont work.
I checked all the things I could.
Shame that there is no schematic for other mobos, like VER-001.
Can't find the ANA power rails that you mentioned.
I will try to "deduct" it from the COK-001 schematic..
Anyway. Many thanks for this roadmap-like testing guide!
Ohm testing:

I made a a test bench for ver-001 with some heavy radiators to start it up and measure voltages from the opposite side.
Turns out that all voltages from the picture are present.
Especially, +1.5V_RSX_VDDIO is definitely present.
- +1.5V_RSX_VDDIO, OK
- +5V_ANA, NEED SCHEMATIC
- +3.3V_ANA, NEED SCHEMATIC
- +1.8V_ANA NEED SCHEMATIC
- +5V_ANA is making it to the Level Shifter (IC2501)
and that it is recieving and shifting 1.5V <--> 3.3V for the folowing signals.- RS_SPD0 --[1.5V]--> IC2501 --[3.3V]--> RS_SPD0_33
- /HDMI_INI --[3.3v]--> I assume SYSCON.
- HDMI is powered and ready to be configured.
- RS_SPD0 --[1.5V]--> IC2501 --[3.3V]--> RS_SPD0_33
- TH2501 is not blown -------------------------- I can clearly see it on other boards, but not on VER-001...
- None of the Zener Diodes are Short OK
- None of the Varistors are Short OK
- None of the Caps are short OK
- Induction Filters are not Short diagonally across themselves. OK
- Q2502, Q2504, and Q2507 are not short.--------------------------------searching for them on ver-001
- R2520 & R2523 are not short-----------------------------------------------searching for them on ver-001
or the SYSCON cannot communicate with
the HDMI transmitter over I2C.
- FB2501, FB2503, & FB2504 are not blown. ----------------------------searching for them on ver-001
- R2502 Isn't blown or HDMI Reset wont work. ----------------------------searching it on ver-001
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