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Search: Posts Made By: Pierre95
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices Today, 05:38 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

After some theoretical reading about brushless sensorless motors, I realized the measurements of the M1A, M2A and M3A signals were not valid as they were referenced towards the regular D GND ground...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-30-2019, 02:23 PM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I made recordings of the M1A, M2A and M3A and /CYL ON signals. When the tape ejection mechanism is opened/closed, we can see /CYL ON going low for 2 seconds then high again. Within the 2 second /CYL...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-21-2019, 05:09 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I tried the flet pen mark test. The video heads drum changed its position but maybe it was due to the tape being pushed against the video drum while the cassette was getting to its position within...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-20-2019, 05:18 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

That's a good point you had the opportunity to work on several brands/models of camcorders. About me, it's the first time I have to service a camcorder and I have to say the level of integration and...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-18-2019, 09:29 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

Ok I will try the flet pen mark test. About the flex cable, I already checked the wiring between the motor and the IC through that cable.

What about the COM CYL signal? Is it through it that the...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-18-2019, 06:50 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

As error F05 refers to "Cylinder Lock", I concentrated on checking continuity of the 7 wires between connector FP2202 and corresponding pins on IC2201. I checked directly on where the signals end, on...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-17-2019, 06:08 PM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I did not have time to check for broken soldering joints yet, but I've got the idea to trigger displaying the error code behind the "Please re-operate after pushing reset button" message by pressing...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-16-2019, 05:59 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I will inspect soldering joints near the plugs involved in the tape mechanism.

As the behavior is not the same when a tape is inserted, the tape detection seems to work properly. There may be...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-15-2019, 05:02 PM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I can claim for sure that when the backlight issue occured, everything was operating well (tape was loading and I was able to record/play movies on the tape). According to this and the fact that an...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-14-2019, 04:17 PM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I managed to locate IP1001 and replaced it. The camcorder powers ON again, but even after R1002 removal I'm still getting the tape insertion issue.

It seems the video drum doesn't rotate at all...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-14-2019, 11:46 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I will try what you are suggesting.

Unfortunately, I am facing another issue by now: I stupidly forgot to remove the battery when I was connecting back the LCD monitor in order to see if it still...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-14-2019, 03:14 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I reseated all 5 cables involved in the tape mechanism but unfortunately the result is the same. The loading motor is for sure operating as under some conditions the tape gets in. The capstan motor...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-09-2019, 11:18 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

OK, I will have a detailed inspection. The mechanism opens/closes normally without a tape, regardless of the ON/OFF status, and when turned ON, after the "Please re-operate after pushing reset...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-08-2019, 01:45 PM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

After reassembly I'm getting an unexpected error. When a tape is inserted, the mechanism refuses to push the tape down. After a few seconds I get the error message "Please re-operate after pushing...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-08-2019, 10:43 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

IP1003 is also mentionned as a circuit protector fuse, but the component I replaced cannot be IP1003 which if opened will not affect M NOREG voltage.

Strange they labelled R1002 as being a...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-08-2019, 10:18 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

R_J, you are a master!

I just replaced the resistor that in opinion is R1002 and the backlight is working again!

Thank you so much for the help you provided to me.

I'm still guessing what...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-08-2019, 04:37 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

Picture of what I think is R1002:
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-08-2019, 04:08 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I have located R1002. I'm not completely sure about it as there are also components on the other side of the PCB. The component has a V label on it, and as you suggested, it's an open circuit. I read...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-05-2019, 03:33 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

Thanks for this manual.

I succeeded in disassembling the camcorder.

Now I have to locate R1002 and LB1001 on the mainboard.

I agree with your analysis of the low voltage at Q902's drain, and...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-03-2019, 02:59 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

The 4,4V are also on pin 4 of T901 and on both sides of L901, I also checked L901 is not an open circuit. As per your suggestion, I have by now to check for low M NOREG on the other board (page 74),...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-02-2019, 06:49 AM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I checked the voltages with a scope: Q902 drain is only 4,4V. Pin 4 of IC908 output is 0V.

I tried on a 6 inch CCFL from a car display but it didn't light up.
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 05-01-2019, 05:24 PM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

I am measuring the voltage at TL901/TL902 by the use of a digital multimeter set on 700V ACV. It displays 0V.

By open you mean the CCFL is broken? Is there a way I could simulate a CCFL by...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 04-30-2019, 05:47 PM
Replies: 35
Views: 729
Posted By Pierre95
Re: Panasonic NVGS50 camcorder backlight issue

When the display is opened I have 1,2V between the base of QR904 and emitter (connected to ground). Firstly that seems a nonsense as the voltage between base and emitter cannot go beyond 0,7V-0,8V...
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 04-28-2019, 04:42 AM
Replies: 35
Views: 729
Posted By Pierre95
Panasonic NVGS50 camcorder backlight issue

Hi,

I'm getting a backlight issue with the integrated LCD monitor. The LCD display itself is working well as the image can be seen when applying an external light source.

There is a hall sensor...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 04-28-2019, 03:34 AM
Replies: 13
Views: 481
Posted By Pierre95
Re: Compaq pressario CQ61 display issue

You're welcome. Yes it's great being able to keep the original display as it is not used too much.
Showing results 1 to 25 of 39

 
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