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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Panasonic service mode (can't change settings)
Hello,
A while ago I was able to get into the service mode on my Panasonic 34wx50 and change all the settings I wanted. But now, I can get into the made, change the size and position of the picture, but am unable to change any of the colour, brightness or contrast settings. Any ideas what could be causing this? I had an engineer come out and look at the TV after I had done my initial tweaking through the service menu. He seemed a little suprised that I had been messing around with it (even though he made next to no changes to my settings), but I'm wondering if there's something he could have done so that I couldn't change the values - some kind of lock-up? Any help is appreciated. |
#2
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Panasonic service mode (can't change settings)
Actually I am suprised the Tech would even attempt
to make adjustments after you had messed with it. Its very obvious that you dont have a clue as to what you are doing hence you made adjustments then call the Tech in then suggest HE did something to the menu,s. Myself I have run into 2 sets where the customer had messed with the Service Menu,s ,my response was Have A Nice Life ..........Bye Bye. Dont waste my time. jmo kip "Limited Edition Clear Vinyl" wrote in message om... Hello, A while ago I was able to get into the service mode on my Panasonic 34wx50 and change all the settings I wanted. But now, I can get into the made, change the size and position of the picture, but am unable to change any of the colour, brightness or contrast settings. Any ideas what could be causing this? I had an engineer come out and look at the TV after I had done my initial tweaking through the service menu. He seemed a little suprised that I had been messing around with it (even though he made next to no changes to my settings), but I'm wondering if there's something he could have done so that I couldn't change the values - some kind of lock-up? Any help is appreciated. |
#3
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Panasonic service mode (can't change settings)
"john" wrote in message .. . Actually I am suprised the Tech would even attempt to make adjustments after you had messed with it. Its very obvious that you dont have a clue as to what you are doing hence you made adjustments then call the Tech in then suggest HE did something to the menu,s. Myself I have run into 2 sets where the customer had messed with the Service Menu,s ,my response was Have A Nice Life ..........Bye Bye. Dont waste my time. jmo kip If the manufacturers made sets that were setup correctly in the first place, no-one would need to adjust the 30%+ overscan & shagged geometry would they? Hopefully, with an attitude like that in front of the customer (ok, they shouldn't have messed, but the TV are always crap out the box) it wont be long before one of them gives a you a good hiding. Remember, these people keep you in a job ffs. The most common parameters that need correction are H&V amplitude & picture position. These SHOULD be on a sets user menu from the start. In fact all the ones you can adjust on a PC monitor SHOULD be on a TV. I do agree he should pay for the engineers time, but an attitude like yours wouldn't go very far with me. Nige |
#4
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Panasonic service mode (can't change settings)
Ok !
Let me put it another way. First why does a person want to get into the Service Menu , the chances are the TV has a fault which they think getting into the Service Mode will cure . There is nothing worse than trying to rectify somebody elses messed up Service Mode adjustments , that also includes when they have ****ed around with the convergence ALL of this whilst chances are the TV has a fault. kip -- "Watch the return E-Mail addy its false" "Nige, On a Mission From God............" wrote in message ... "john" wrote in message .. . Actually I am suprised the Tech would even attempt to make adjustments after you had messed with it. Its very obvious that you dont have a clue as to what you are doing hence you made adjustments then call the Tech in then suggest HE did something to the menu,s. Myself I have run into 2 sets where the customer had messed with the Service Menu,s ,my response was Have A Nice Life ..........Bye Bye. Dont waste my time. jmo kip If the manufacturers made sets that were setup correctly in the first place, no-one would need to adjust the 30%+ overscan & shagged geometry would they? Hopefully, with an attitude like that in front of the customer (ok, they shouldn't have messed, but the TV are always crap out the box) it wont be long before one of them gives a you a good hiding. Remember, these people keep you in a job ffs. The most common parameters that need correction are H&V amplitude & picture position. These SHOULD be on a sets user menu from the start. In fact all the ones you can adjust on a PC monitor SHOULD be on a TV. I do agree he should pay for the engineers time, but an attitude like yours wouldn't go very far with me. Nige |
#5
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Panasonic service mode (can't change settings)
I wish that there were a way to "lock up" the settings so they couldn't be
tweaked by the do it yourself newbie. Televisions are NOT like computer monitors with all of these parameters that are fully adjustable by operator controls via front panel buttons....... most of these settings on consumer televisions are limited in range and if severely mis-adjusted, can cause all kinds of other problems..... this is why there is a hard to access service menu..... for service techs. -- Best Regards, Daniel Sofie Electronics Supply & Repair --------------------- "Limited Edition Clear Vinyl" wrote in message om... Hello, A while ago I was able to get into the service mode on my Panasonic 34wx50 and change all the settings I wanted. But now, I can get into the made, change the size and position of the picture, but am unable to change any of the colour, brightness or contrast settings. Any ideas what could be causing this? I had an engineer come out and look at the TV after I had done my initial tweaking through the service menu. He seemed a little suprised that I had been messing around with it (even though he made next to no changes to my settings), but I'm wondering if there's something he could have done so that I couldn't change the values - some kind of lock-up? Any help is appreciated. |
#6
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Panasonic service mode (can't change settings)
If there is a fault, the effected circuits should be checked for faults and
corrected before going in the service mode. The factory settings are usually set for the life of the set, and some are only changed at the time of service, if any critical parts have been changed, where the set-ups are effected (very rare). From the factory, these sets are set-up for an accuracy that meets the standards set to meet industry standards, and standards by the IEEE, SMPTE, FCC, and DOC, and etc, depending on where the set is to be used. Most likely you changed something that locked you, and anyone else out. This is easy to do on some models of sets. Some models of sets have a setting for the options and or model of set. Entering the wrong setting can infact lock the uPC from functioning properly in the set-up mode. Since this is not a user option, there are some settings where they can be set to over-range, thus causing some serious fault conditions, and or even locking the set-ups, or an operation of the set. The fix in this case is to change the uPC, and or associated EPROM(s). Then the complete factory set-up at the shop must be done to put the set back to normal operation. If this is the case, you are in for a very expensive repair. -- Greetings, Jerry Greenberg GLG Technologies GLG ========================================= WebPage http://www.zoom-one.com Electronics http://www.zoom-one.com/electron.htm ========================================= "Limited Edition Clear Vinyl" wrote in message om... Hello, A while ago I was able to get into the service mode on my Panasonic 34wx50 and change all the settings I wanted. But now, I can get into the made, change the size and position of the picture, but am unable to change any of the colour, brightness or contrast settings. Any ideas what could be causing this? I had an engineer come out and look at the TV after I had done my initial tweaking through the service menu. He seemed a little suprised that I had been messing around with it (even though he made next to no changes to my settings), but I'm wondering if there's something he could have done so that I couldn't change the values - some kind of lock-up? Any help is appreciated. |
#7
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Panasonic service mode (can't change settings)
john wrote:
Ok ! Let me put it another way. First why does a person want to get into the Service Menu , the chances are the TV has a fault which they think getting into the Service Mode will cure . There is nothing worse than trying to rectify somebody elses messed up Service Mode adjustments , that also includes when they have ****ed around with the convergence ALL of this whilst chances are the TV has a fault. kip I've had two Panasonic sets (OK 4, if you count the fact that I ended-up sending three back because they couldn't be adjusted to my satisfaction) and from what I can make out from the NGs, Panasonics are always badly set up. My current Pannie is pants geometry-wise, but as it's a second set I can't be arsed to do anything about it right now. Service/engineering menus should always be avoided, but if the sets were correctly set-up in the first place, Johnny Customer wouldn't feel the need to try and tweak things, rather than wait an eternity for either an engineer to come on-site or for the set to disappear to a dealer's for weeks on end. From what I recall, Panasonic service menus are multi-layered. The first set of adjustments are for position, alignment etc. and are pretty straight forward - I had no problem adjusting things as far as I could go. I agree that messing with voltage settings and such like is to be avoided, and any chump that plays with this sort of thing is asking for trouble. There's an easy fix though for Panaasonic TVs: (1), Panasonic should set the bloody things up properly before foistering them on Joe Public and (2) expose some of the hidden adjustments so that Joe Public can make some alterations without doing any damage. Clem |
#8
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Panasonic service mode (can't change settings)
Gee I missed that part 30%+ overscan then you definetly have a faulty set.
kip no-one would need to adjust the 30%+ overscan & shagged geometry would they? |
#9
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Panasonic service mode (can't change settings)
I do agree he should pay for the engineers time, but an attitude like
yours wouldn't go very far with me. Nige I think all CRT TV's/RP's should have tilt adjustment, as each is slightly out (and very difficult to correct) needs adjustment of the actual CRT's. Very risky!! |
#10
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Panasonic service mode (can't change settings)
No No ...The Yoke
Not the CRT. kip -- "Watch the return E-Mail addy its false" "Nath" wrote in message . .. I do agree he should pay for the engineers time, but an attitude like yours wouldn't go very far with me. Nige I think all CRT TV's/RP's should have tilt adjustment, as each is slightly out (and very difficult to correct) needs adjustment of the actual CRT's. Very risky!! |
#11
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Panasonic service mode (can't change settings)
"john" wrote in message .. . No No ...The Yoke Not the CRT. kip Do you know how to access the service menu on a Sharp 30 inch widescreen LCD TV? Nige |
#12
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Panasonic service mode (can't change settings)
Almost all CRT's that I have seen in the last 12 years have
the yoke bonded(glued) to the tube. All of these had in-line guns. The yokes are factory aligned for perfect registration, and have passed final inspection. This could be one reason for the emergence of OSD controls, allow the final touch up for the users eye. "john" wrote in message .. . No No ...The Yoke Not the CRT. kip -- "Watch the return E-Mail addy its false" "Nath" wrote in message . .. I do agree he should pay for the engineers time, but an attitude like yours wouldn't go very far with me. Nige I think all CRT TV's/RP's should have tilt adjustment, as each is slightly out (and very difficult to correct) needs adjustment of the actual CRT's. Very risky!! |
#13
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Panasonic service mode (can't change settings)
Why ? Is the picture to clear for you.
Nice try Nige. kip -- "Watch the return E-Mail addy its false" "Nige, On a Mission From God............" wrote in message ... "john" wrote in message .. . No No ...The Yoke Not the CRT. kip Do you know how to access the service menu on a Sharp 30 inch widescreen LCD TV? Nige |
#14
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Panasonic service mode (can't change settings)
"john" wrote in message .. . No No ...The Yoke Not the CRT. kip Fair enough- the yoke. Still risky procedure. I've done quite a bit to my display (have to go into service level to do convergence) haven't killed the set, although I have read of alot of people doing it (changing settings without a slightest idea what it does, and haven't written down original values etc) I don't blindly adjust (I know VLIN and VPOS can kill my set) also in design mode there's about 200-300 settings. |
#15
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Panasonic service mode (can't change settings)
John,
Actually, the "Tech" said, "Obviously, you know what you're doing", answered some of the questions I still had about the set, made no adjustments whatsoever that improved upon what I had already done and went on his way. I was just curious if there was a setting he may have changed, since prior to his visit I could make changes, and since his visit I haven't be able to. It's quite simple, really. "john" wrote in message ... Actually I am suprised the Tech would even attempt to make adjustments after you had messed with it. Its very obvious that you dont have a clue as to what you are doing hence you made adjustments then call the Tech in then suggest HE did something to the menu,s. Myself I have run into 2 sets where the customer had messed with the Service Menu,s ,my response was Have A Nice Life ..........Bye Bye. Dont waste my time. jmo kip "Limited Edition Clear Vinyl" wrote in message om... Hello, A while ago I was able to get into the service mode on my Panasonic 34wx50 and change all the settings I wanted. But now, I can get into the made, change the size and position of the picture, but am unable to change any of the colour, brightness or contrast settings. Any ideas what could be causing this? I had an engineer come out and look at the TV after I had done my initial tweaking through the service menu. He seemed a little suprised that I had been messing around with it (even though he made next to no changes to my settings), but I'm wondering if there's something he could have done so that I couldn't change the values - some kind of lock-up? Any help is appreciated. |
#16
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Panasonic service mode (can't change settings)
In article , john
wrote: Gee I missed that part 30%+ overscan then you definetly have a faulty set. I also purchased a Panasonic TV about a year ago. It was also 'overscanning' so I had to use the 'service menu' to adjust the picture size and position on-screen. FWIW I do have some background in engineering, and also understood that if I messed thing up it would be my own fault. :-) However, I must admit I am puzzled by this issue: Should we accept that sets tend to be delivered with noticable overscan? I assume this is just to give a 'more impressive' (i.e. larger) image in the shop, but I find it irritating not to be able to see the entire image. So far as I can recall, every TV I've ever bought did this, and I ended up adjusting them. In eary days this was with a trimmer tool and a mirror - somewhat more of an adventure than using a service menu. :-) If some settings combinations can do damage, then it is fair enough to hide them *if the user has no requirement for adjusting them*. However if this applies to something like dealing with overscan, and the makers overscan by default, then maybe a different approach by the maker is better. For example, allowing a *limited* range of adjustment on an owner menu, but have the limits for this over-rideable on a service level. Given the overscan I find strange not to have size adjustments easily accessible to the user. Slainte, Jim -- Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html |
#17
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Panasonic service mode (can't change settings)
"john" wrote in message .. . Why ? Is the picture to clear for you. Nice try Nige. I'm serious, the overscan is horrific, the dealers coming today & bet my life he wont know how to change it. Picture is fantastic, but the overscan is horrific. I have had 2 & they are both similar. Nige |
#18
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Panasonic service mode (can't change settings)
Nige !
What I would do is give them back the TV its as simply as that. What is the age of this set ? kip -- "Watch the return E-Mail addy its false" "Nige, On a Mission From God............" wrote in message ... "john" wrote in message .. . Why ? Is the picture to clear for you. Nice try Nige. I'm serious, the overscan is horrific, the dealers coming today & bet my life he wont know how to change it. Picture is fantastic, but the overscan is horrific. I have had 2 & they are both similar. Nige |
#19
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Panasonic service mode (can't change settings)
Nath wrote:
"Nige, On a Mission From God............" wrote in message ... "john" wrote in message ... Why ? Is the picture to clear for you. Nice try Nige. I'm serious, the overscan is horrific, the dealers coming today & bet my life he wont know how to change it. Picture is fantastic, but the overscan is horrific. I have had 2 & they are both similar. Nige How difficult will it be to get (exact) pixel perfect overscan? With CRT it makes little difference, but the whole point of LCD/Plasma is to get the source to the same size as the panel (ie for a Panasonic Plasma with native NTSC resolution you'll want to zoom/squash H/V size exact to the borders. Possibly use a ATI PC with custom montiro rez, with a dotty cross pattern to get exact perfect, so no scaling is done if you've set it to far either way of the correct setting. You have to scale if the native res of the panel is higer than 576 pixels, as that's the resolution of TV/DVD etc in the UK. If you didn't scale the video signal you'd end up with a small pic in the centre of your new lcd tv (or worse stil top left). It's the scaling that's causing Nige's issue because, clearly, his media box is lopping off top and bottom of the input. Bear in mind that *most* lcd TVs are natively 1280 x 1024 or 1280 x 768 or better. -- Patrick "I did the grabs via a Duomix61 grabber as used by 'security sources'" "I never grabbed them on a PC mate -they went via IE56575 to a fancy technical thingie grabber -or something" - un-named Video capture 'expert' |
#20
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Panasonic service mode (can't change settings)
"john" wrote in message .. . Nige ! What I would do is give them back the TV its as simply as that. What is the age of this set ? kip 3 days old. It's the second one I have had too. |
#21
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Panasonic service mode (can't change settings)
My RP is slightly overscanning horizontally- when I display the Avia screen
with a I----+----I test the two I's are just outside the screen- if I use the user level horizontal position I can bring either one in, but obviously it's off-centre. I tried adjusting WID and readjusting convergence- a little bit too much work. I put it back after a bit, as I'm unsure of overall widescreen shape (might be egg-shaped, I guess you need to set horizontal & vertical to the same overscan setting- say 3% for both?) and re-do geometry & convergence. I guess a LCD & Plasma is alot easier, if you can do this within user level would be cool, and maybe custom overscan modes for PAL & NTSC (being that they have different resolution etc) |
#22
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Panasonic service mode (can't change settings)
"Nath" wrote in message ... My RP is slightly overscanning horizontally- when I display the Avia screen with a I----+----I test the two I's are just outside the screen- if I use the user level horizontal position I can bring either one in, but obviously it's off-centre. I tried adjusting WID and readjusting convergence- a little bit too much work. I put it back after a bit, as I'm unsure of overall widescreen shape (might be egg-shaped, I guess you need to set horizontal & vertical to the same overscan setting- say 3% for both?) and re-do geometry & convergence. I guess a LCD & Plasma is alot easier, if you can do this within user level would be cool, and maybe custom overscan modes for PAL & NTSC (being that they have different resolution etc) You would think so, but the LCD I just bought is going back as overscan cannot be resolved due to NO adjustments for horizontal & vertical amplitude. Looks like it's another plasma for me. Nige |
#23
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Panasonic service mode (can't change settings)
To answer this guy's question about the service menu not affecting
contrast brightness color etc They are only designed to change those parameters in the SERVICE MODE ie the settings are not supposed to be retained. Sub color sub brightness etc WILL be retained. And as far as tilt is concerned especially on bigger screens(CRT's only) the tilt will change depending on the orientation of the TV ie North South East and Wset because of the Earth's magnetic field so a customer setting (tilt) would be a good idea. Dave Nath wrote: "john" wrote in message .. . No No ...The Yoke Not the CRT. kip Fair enough- the yoke. Still risky procedure. I've done quite a bit to my display (have to go into service level to do convergence) haven't killed the set, although I have read of alot of people doing it (changing settings without a slightest idea what it does, and haven't written down original values etc) I don't blindly adjust (I know VLIN and VPOS can kill my set) also in design mode there's about 200-300 settings. |
#24
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Panasonic service mode (can't change settings)
Width and Height adjustments should NOT be made using AVIA test patterns
they don't work(trust me I've been doing this since 1976) THE only way to calibrate the tv is with proper test equipment. The problem is you are playing those patterns thru your DVD player which WILL screw it up. AND you are only setting NTSC modes NOT HD modes plus you need to be able to set the DVD to progressive and interlace modes as they are diff adjustments! Dave Nige, On a Mission From God............ wrote: "Nath" wrote in message ... My RP is slightly overscanning horizontally- when I display the Avia screen with a I----+----I test the two I's are just outside the screen- if I use the user level horizontal position I can bring either one in, but obviously it's off-centre. I tried adjusting WID and readjusting convergence- a little bit too much work. I put it back after a bit, as I'm unsure of overall widescreen shape (might be egg-shaped, I guess you need to set horizontal & vertical to the same overscan setting- say 3% for both?) and re-do geometry & convergence. I guess a LCD & Plasma is alot easier, if you can do this within user level would be cool, and maybe custom overscan modes for PAL & NTSC (being that they have different resolution etc) You would think so, but the LCD I just bought is going back as overscan cannot be resolved due to NO adjustments for horizontal & vertical amplitude. Looks like it's another plasma for me. Nige |
#25
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Panasonic service mode (can't change settings)
"David Heller" wrote in message ... Width and Height adjustments should NOT be made using AVIA test patterns they don't work(trust me I've been doing this since 1976) THE only way to calibrate the tv is with proper test equipment. The problem is you are playing those patterns thru your DVD player which WILL screw it up. AND you are only setting NTSC modes NOT HD modes plus you need to be able to set the DVD to progressive and interlace modes as they are diff adjustments! Dave My CRT RP is not HD, nor is it progressive. Interlaced only. It's a pity width & height adjustments effect geometry & convergence.. if it stayed correct I could adjust both easily, and not have to correct geoimetry & convergence afterwards. |
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