At this point I am leaning towards the Marquee VNB, as I think the „better for LUG tubes” thing is a bit over blown. I mean the fact that the LUGs have lower capacitance plates means no disadvantage at any rate for any design. The XG also have low capacitance guns just like the LUG, and I had no issue with installing the VNBs in it. I think this problem is more of a Marquee thing as it have a very problematic focus coil design to start with, and this may be worsened with improper G2-gain-brightness working point. Bias in the end stage also set brightness just like the G2 voltage, but they do different for the spot size as G2 is referred also to the anode voltage. Generally the higher the G2 voltage is kept the tighter the beam will be, but high G2 voltage shuts down tube which in turn have to be compensated on the output stage biasing.
Of course the Barco end stage can also be tested, but still a lot of modifications would be needed to disable the ABL function as that is certainly not very well implemented and surely holding back some horse power. I saw that a 909 with well implemented mods on its stock board configuration can resolve 1080P 60Hz very well, I aim 1080P 72Hz or beyond. As I said I am willing to test the 909 neckboard performance as I have the equipment to evaluate it quite faithfully, designing the measurement setup: getting all the supply voltages and support signals together on the bench which makes it painful.
Post by radiohead314 on Mar 11, 2017 10:36:06 GMT -5
Hi Gjaky, do you have any idea what makes the Barco so much brighter when I compare to the Marquee. I use the Barco in normal setting while there is also the economy setting and the boosting setting but light spots in a movie, like sunshine, have much more pop or punch or something that I like very much. Could this be something with the HV (different settings)? Hope we can preserve it with the Marquee neckboards.
Post by radiohead314 on Mar 11, 2017 10:41:15 GMT -5
These are the settings:
Normal Default Setting Economic Lower drive current to the CRT’s, the lifetime of the CRT’s will enlarge but the light output will reduce. Temporary Boost Higher drive current to the CRT’s, the lifetime of the CRT’s will shorten but the light output will be higher. This situation is temporary, when restarting the projector, the drive mode is automatically set to normal. Permanent Boost Higher drive current to the CRT’s, the lifetime of the CRT’s will shorten but the light output will be higher. This setting will be saved in the EEPROM. When restarting the projector, it will start up in boost mode.
I add here some information just to see this topic is not abandoned. In fact I found solution to all problems (at least on paper) with adapting the VNB to the Barco. Also I got my hands on a considerable amount of Marquee VNBs for cheap so I could supply the whole modification myself, which would make the deal smoother and more transparent.
Also I post the manual G2 regulator circuit's schematic (one color):
zjjxhzf: hello Gabor i am DLP projectorColor wheel is not accurate，setup memory， the phase angle cant setting for the color wheel ，must use service code.
Sept 19, 2017 1:31:25 GMT -5
mastertech: Hi stranger. Guess you spent your summer cruising on that street bike.
Sept 17, 2017 21:43:54 GMT -5
nashou: Hey everyone, just saying hi ! Hvent been here for a while hope you're all doing well !!
Sept 17, 2017 19:19:25 GMT -5
mastertech: Parts for repair are no longer available.
Sept 11, 2017 19:42:24 GMT -5
mayavi: my pioneer elite VSX-92TXH it freezes until I unplug and then it won't power on until maybe 10 minutes. came to know that its a common problem in this model. any help would be much appreciated......
Sept 11, 2017 13:39:10 GMT -5
jaredjaric: Thanks so much Hulio :), your expertise is very much respected
Aug 20, 2017 9:25:37 GMT -5
Admin: james: you need to post in the thread where your problem is being discussed.
Aug 9, 2017 19:51:54 GMT -5
james: Yes Sir All wiring was connected.
Aug 9, 2017 7:46:15 GMT -5
Admin: I have uploaded a copy of the SM to the digital projector section.
Jan 10, 2017 20:21:56 GMT -5
ducki: sorrry for my bad english ....(google translate
Jan 10, 2017 17:44:21 GMT -5
ducki: I have the same defect as a cp-x4021n you but can not start it ... I did the same trials with ic202 pc102 and still do not like, I make short pin 1 and 2 of the pc102 and PJ light (orange) goes off ... you can help me with a service manual for this PJ? TNX
Jan 10, 2017 17:43:46 GMT -5
jlb12: pwr switch off = 2(0.0) 3(11.7) 6(.04) 7(.04)
Dec 13, 2016 23:27:03 GMT -5
jlb12: No Problem. Thank you for all your help.
Dec 13, 2016 0:20:40 GMT -5