DCH box testing soon.

DCH 70 DCH3416
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bftiedt
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Post by bftiedt »

any new info on this? i have a dch i would love to test
usbbdm
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Post by usbbdm »

I will look at this once more after I finish the VDV20 JTAGing. VDV21 has some missing resistors and make the JTAG disabled. That could be the case for the DCH boxes. I will trace the pins and see if there are any missing component related to JTAG.
usbbdm
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Post by usbbdm »

I get the DCT70 board again. there was a mark on my PCB board and that might explain why my TDI is not working. Has anyone try to JTAG this device? For me the TDI is not working and other than the CPU ID I get nothing. If you can JTAG with IMPCODE different than the CPU ID, that proves that my board is bad.
UserName
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Post by UserName »

nobody test themselves..
do not believe what i say 10% its true :confused:
d0
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Post by d0 »

I was reading about about these JTAG instructions HIGHZ and CLAMP?? Will this allow for the IMPCODE to be detected on the DCH boxes?

• CLAMP
Ensures that the Bypass register is connected between
TDI and TDO, and then drives data that was loaded into
the Boundary Scan register (e.g., via SAMPLEPRELOAD
instruction) to output signals. These signals
do not change while the CLAMP instruction is selected.
• HIGHZ
Puts all chip outputs in inactive (floating) state
(including all pins that do not require a TRI-STATE
output for normal functionality). Note that not all pull-up
resistors are disabled in this state.

011 HIGHZ Puts all output and bidirectional pins in TRI-STATE.
100 CLAMP Drives fixed data from Boundary Scan register.
d0
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Location: S FL
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Post by d0 »

I was reading about about these JTAG instructions HIGHZ and CLAMP?? Will this allow for the IDCODE to be detected on the DCH boxes?

• CLAMP
Ensures that the Bypass register is connected between
TDI and TDO, and then drives data that was loaded into
the Boundary Scan register (e.g., via SAMPLEPRELOAD
instruction) to output signals. These signals
do not change while the CLAMP instruction is selected.
• HIGHZ
Puts all chip outputs in inactive (floating) state
(including all pins that do not require a TRI-STATE
output for normal functionality). Note that not all pull-up
resistors are disabled in this state.

011 HIGHZ Puts all output and bidirectional pins in TRI-STATE.
100 CLAMP Drives fixed data from Boundary Scan register.
luisgonzalez10
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Post by luisgonzalez10 »

So anything new ,i have three boxes DCH3416 i both in 350 dolaqrs each one with a filter ,is ther any hting new to work with it.What kind of jtag do i need to buy ,thanks luis
usbbdm
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Post by usbbdm »

No. Non of the box seems to have the JTAG enabled.
luisgonzalez10
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Post by luisgonzalez10 »

its mean thst nothing its going to be working for those boxes
4Magoo
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Post by 4Magoo »

Question someone that i know has a dch 3200 3 of them there wide open except for payperviews the channels began to dissapear 8 months later the guy who he purchased it from then came back stuck a usb stick in the port in the rear and the channels came back any ideas how this is being done
merkin
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Post by merkin »

If you know the guy ask him.
4Magoo
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Post by 4Magoo »

Nope he wont say as he sells them but I just lost all my channels and gave him the boxes back as cc is doing upgrades to there system and he brought them back in working order. I did notice that on the Grey HD box the big ones he soldered a 2 wire connection with an adapter at the end so can plugin some type of jumper to get the channels back but only for those grey HD boxes.
ericles1028
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Post by ericles1028 »

Nope he wont say as he sells them but I just lost all my channels and gave him the boxes back as cc is doing upgrades to there system and he brought them back in working order. I did notice that on the Grey HD box the big ones he soldered a 2 wire connection with an adapter at the end so can plugin some type of jumper to get the channels back but only for those grey HD boxes.
Please fill me in on this idea...it seems a bit fishy....
luisgonzalez10
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Joined: Tue Aug 12, 2008 8:18 pm

Post by luisgonzalez10 »

can any one send me a pm to contac th guy ,i have 2 gray boxes that loost the channels
xy-Zee
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Post by xy-Zee »

take a picture of it
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