i got a crt tv which is a pretty neat one, but i made a mistake in the SAM (service alignment menu) i accidentally upped the vertical amplitude too much because the button on the remote stuck. the set jumped into vertical guard mode.
the problem is, i need to set the Vamp back to normal and it should be fine. but i need to do that from the SAM menu, which i can no longer access. i can bypass the software protection that triggers the vertical guard by shorting the SDM pad on the video board which will force me access to SDM and the set stays on. however, when i switch to SAM menu, the vertical guard kicks in within 3 to 5 seconds shutting the system down.
i know that the vertical guard comes from the video board and goes into the plate where the flyback and the PSU are, the vertical guard triggers the standby processor to shut the system down. so if i can circumvent that i can get the set back to normal.
anyone that can give me a hint? i got full schematics.
When it is off. Don't press power. Just those 2 buttons.
Doesn't work. set just switches on, blue screen, shows install then 3 secs and it shuts down again.
I have to bypass the vertical guard protection to get it to stay on, in sdm entered by shorting pads, the set bypasses the software protection and stays on. Unfortunately I can't change the Vamp there.
If I can't bypass the software protection or the vertical guard, this TV is toast as it won't stay on
Last Edit: Jun 2, 2015 18:12:51 GMT -5 by luukneele
theres only virgin mode, which i cannot access because you need the set to stay on, the set shuts off after a few seconds, cant navigate the menu that fast. if you look at the schematics i provided, you can see the way the vguard travels along the signal path. apparently the vguard samples a voltage, which if it exceeds or goes below a certain level it tells the standby processor to cut power.
theres a way to trick the set apparently and bypass the protections, which is what i did with the SMD solder pad-hack. but there seems to be no way to bypass the protections when you go anywhere else. bypassing the vguard (or tricking it) seems to be the only solution. but, how do i do that? i'm afraid this is now a piece of junk.
Nvm I got it, didn't help one bit. It's a software protection apparently. Also I'm throwing the thing out. I removed the lsp panel and every solder joint is either a cold one, or a dry one. Talk about a crappy solder job, at least 5 components broke completely off without any force. This is not worth my time. I'm hauling the thing out on Saturday.
Post by Casethecorvetteman on Jun 4, 2015 3:40:33 GMT -5
Probably fixing those solder joints would have an impact on this issue, but id expect you could add a resistor to the vgaurd line to hold it off the upper limit. Sounds more like its hitting the lower limit though, which bad solder joints could cause id expect?
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