PDA

View Full Version : Install Riddle


dengland
10-20-07, 12:40 PM
I had a problem with an install this morning. What I thought would be an easy job for the tech swapping an HR20 for an HR10 turned into an adventure. I already had working HR20-100 installed in another room, so I figured everything outside must be squared away.

The tech brought in a refurbished HR20-700. No MPEG4 HD. He reboots an does a SW update. He activates the receiver and has a 721 error when he tries a second channel. Must be a bad cable, so he hooks up another cable to the Z68s outsides (I have 2 cascaded supplying 10 lines). No change.

I offer to get the HR20-100 and the BBC from the other room. He hooks that up using the BBCs that he had been using, and has a 721 error on tuner two. He reinstalls the HR20-700. No joy. He swaps one of BBCs and there is no change. He says the problem is with my multiswitch, and that I need to call DTV and request a service call and to request a 6x16. I sucessfully reinstall the HR20-100 in the back bedroom (one original BBC and one new one) and verify everything works while he fiddles in the Living room with the HR20-700. He reboots the HR20-700 again and says it is working (I was not watching close enough to see if he was going between two HD MPEG 4 channels). He says D may be having intermittent problems. He obviously want to leave. Says if I have more problems to call D. He leaves the house.

I change to another HD MPEG4 channel ... 721 error on tuner two. I run out and catch him in the truck and tell him what I found. He says that he has done all he can, and I need a service call.

Not convinced that everything has been tried, I swap cables on the back of the receiver. It sits on aquiring quide data. I get the 2nd known good BBC off of the HR20-100 in the back bedroom and install it on the HR20-700. The HR20-700 works fine. I think, OK bad BBC and poor troubleshooting on the tech's part.

Just to verify the BBC is bad, I install it on the HR20-100...and it works!

RIDDLE: Why would the the BBC work on one reciever and not the other? It is working to the receiver that has a 50' longer cable run. All the BBCs are Version 2's.

NCMAT
10-20-07, 01:03 PM
If I'm not mistaken, you can't cascade the Zinwell WB68. You either need a WB616 or there is a way to run the WB68s in parallel with the 4 inputs split.

litzdog911
10-20-07, 01:05 PM
It might be because you're using two cascaded WB68 multiswitches. Is the DVR that's having problems on the first multiswitch or the second (cascaded) switch? That might make a different.

It's not recommended to cascade these multiswitches. The preferred solution is the WB616 16-output multiswitch. Or using two WB68's side-by-side, with each input line split (one of the few times you can safely use a wideband splitter with satellite cables).

veryoldschool
10-20-07, 01:05 PM
Are you sure it wasn't: 771 [no or low SAT signal]?
721 is for a channel not in your programing package.

davring
10-20-07, 01:06 PM
If I'm not mistaken, you can't cascade the Zinwell WB68. You either need a WB616 or there is a way to run the WB68s in parallel with the 4 inputs split.

People here report that you can cascade WB68's, there is a proper way to do it, polarity is important IIRC. Do a search here for info.

veryoldschool
10-20-07, 01:22 PM
People here report that you can cascade WB68's, there is a proper way to do it, polarity is important IIRC. Do a search here for info.
Cascading has no polarity since the second one is going into a switch.
What has been recommended is to use the 1-4 outputs off the first switch to feed the second.

dengland
10-20-07, 01:28 PM
It might be because you're using two cascaded WB68 multiswitches. Is the DVR that's having problems on the first multiswitch or the second (cascaded) switch? That might make a different.

It's not recommended to cascade these multiswitches. The preferred solution is the WB616 16-output multiswitch. Or using two WB68's side-by-side, with each input line split (one of the few times you can safely use a wideband splitter with satellite cables).
In June when I got the HR20-100 and the new dish, that installer removed two powered multiswitches connected in parallel (split input from the LNBs) and replaced them with the WB68s cascaded. The DVR that was having problems was on the WB68 that was connected directly from the dish. Not sure about the DVR that was happy if it was on the 1st or the cascaded one.

Are you sure it wasn't: 771 [no or low SAT signal]?. 771 makes more sense. I will swap back to confirm after the Gator game. Will also check polarity.

Thanks for the responses.

dengland
10-29-07, 05:58 PM
Looks like the BBC is the culprit. It indeed was 771 message. The "suspect" BBC failed on the HR20-100 where it initially worked. Moving the BBC to the other tuner and the problem followed. New BBC on order (actually 2 are coming).

AntAltMike
10-30-07, 10:59 AM
While the installation literature I have seen on the WB68 says it can't be cascaded, many here report succes in doing so, but you should keep in mind that a WB68 has six inputs, not four, and if have a situation that uses the 72.5 or 95 degree slots, I would be very surprised if the flexiport inputs of the cascaded WB68 would call for correct signals from the source WB68.

veryoldschool
10-30-07, 11:14 AM
While the installation literature I have seen on the WB68 says it can't be cascaded, many here report succes in doing so, but you should keep in mind that a WB68 has six inputs, not four, and if have a situation that uses the 72.5 or 95 degree slots, I would be very surprised if the flexiport inputs of the cascaded WB68 would call for correct signals from the source WB68.
"Splitting" the 72.5/95 SAT feeds to both WB68 "Should" solve this.