Riddled TV Repair Forum

sodakjones · Joined: 31 Dec 2008 Posts: 6 Location: South Dakota

this unit will turn on just fine and work great for hours. But after you turn it off and leave it plugged in for a short while it will no longer turn on it just clicks then goes back off. if you unplug it for a day or so it will turn back on then.

my background is i have done a lot of work on circuit boards design and building but have never really do any tv repair. some direction on where to start with this would be great.

the picture is great and convergence is perfect.

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Jesse Mack · Joined: 22 May 2008 Posts: 600 Location: The Last Frontier

Sorry, but I believe your model number is incomplete. There should be a AV or HD etc etc prefix then a dash then the rest of the number.

Jesse

sodakjones · Joined: 31 Dec 2008 Posts: 6 Location: South Dakota

sorry about that it is AV-50D501

sodakjones · Joined: 31 Dec 2008 Posts: 6 Location: South Dakota

did i not provide enough information.

Jesse Mack · Joined: 22 May 2008 Posts: 600 Location: The Last Frontier

Yes, However this set is VERY old and I have little information on it. It does not show up on JVC's Website and I do not even have literature on it and I have literature going back forever (grin). I am checking to see if there are board level replacement parts so hold on.

Jesse

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Jesse Mack · Joined: 22 May 2008 Posts: 600 Location: The Last Frontier

I did some checking and the Power/Deflection board part number 930B856002 is still available but the price is high - Retails for $499.00. The Service Literature is also still available part number S/MAV50D/60D costs 36.02.

I also looked in my archive literature to no avail.

At those priced it might be cheaper for you to have a warranty authorized servicer repair the unit. That is unless someone else on this forum has the information you need.

I was curious about the part number as they looked like Mitsubishi and JVC is a arm of Mitsubishi so I plugged the part number into Mitsubishi and came up with NLA on the board and a chassis of VZ8

The following is a Symptom/Cause from the VZ8 chassis. It may or may not apply.

PS-45VZ8
Symptoms: SHUTDOWN
Causes: Cause #1
This model is equipped with a self-diagnosis feature to help with diagnosis of shutdown problems. To activate this turn the unit on let it shutdown then press the input/device and menu buttons on the front panel simultaneously and hold them in for 5 seconds after 5 seconds the power LED on the front panel will blink a two digit sequence. This will be one set of blinks a short pause then another set of blinks, this will repeat 5 times. 1 - 2 = no error detected 2 - 1 = X-ray protect (high voltage or beam current) 2 - 2 = Short protect (short protect monitors low voltage supplies) 2 - 3 = Deflection protect (this could be loss of vertical or horizontal deflection) 2 - 4 = Vertical protect (usually loss of vertical from the source) 1. MAY BE INTERMITTENT, SELF-DIAGNOSIS ERROR 23 OR 24. CHECK SOLDER CONNECTIONS AT CONNECTOR "DY" ON THE YOKES. 2. SHUTDOWN AT POWER WITH SELF-DIAGNOSIS ERROR 23 OR 24. CHECK C411 2200 UFD 35 V AND C412 10 UFD 50 V, BOTH LOCATED ON THE MAIN PCB.

VT-VZ8
Symptoms: SHUTDOWN
Causes: Cause #1
1. MAY BE INTERMITTENT, SELF-DIAGNOSIS ERROR 23 OR 24. CHECK SOLDER CONNECTIONS AT CONNECTOR "DY" ON THE YOKES. 2. SHUTDOWN AT POWER WITH SELF-DIAGNOSIS ERROR 23 OR 24. CHECK C411 2200 UFD 35 V AND C412 10 UFD 50 V, BOTH LOCATED ON THE MAIN PCB.

When you turn it on and it does not come on the unit may be going into shutdown and, without unplugging, enter the selfcheck mode as described above.

Hope this helps

Jesse

sodakjones · Joined: 31 Dec 2008 Posts: 6 Location: South Dakota

Wow thanks I will look into this as soon as i can get the set moved in side. it is sub zero outside so that wont work give me a few days an ill post back what i find thanks again this is the most info ive had in a year.