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Panasonic Plasma TC-P42C2 Blinks 10 Times Help!   Goto page 1, 2, 3  Next  
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playab0yyy



Joined: 08 Dec 2014
Posts: 13
Location: Tampa, FL

PostPosted: Mon Dec 08, 2014 6:21 am    Post subject: Panasonic Plasma TC-P42C2 Blinks 10 Times Help! Reply with quote

I have a Panasonic Plasma TC-P42C2 that is clicking 10 times with no screen or backlight. I don't know much about this stuff. New to repairing tv's. I've looked at the back and don't see any bulging caps (but that doesn't mean I'm overlooking something with regards to the caps). Suggestions for what I can do? Thanks in advance!

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JTS1957



Joined: 21 Jan 2009
Posts: 2340
Location: Far, Far Away

PostPosted: Mon Dec 08, 2014 2:35 pm    Post subject: Reply with quote

"Clicks"... as in a noise or a measure of a distance?

Most TV's use their 'power,' 'stand-by' or 'timer' LEDs to "blink" an error code. In this case: "The number of times that the POWER LED blinks indicates the areas where a problem is suspected."

A short circuit of the Vsus or the Vda can also cause a 10 blinks shutdown.
playab0yyy



Joined: 08 Dec 2014
Posts: 13
Location: Tampa, FL

PostPosted: Mon Dec 08, 2014 2:49 pm    Post subject: Reply with quote

Sorry, I meant "blinks". I just updated the topic. What is the Vsus and Vda? Sorry, I'm a newbie!
JTS1957



Joined: 21 Jan 2009
Posts: 2340
Location: Far, Far Away

PostPosted: Mon Dec 08, 2014 3:53 pm    Post subject: Reply with quote

Go download and peruse the service manual for your model:
http://elektrotanya.com/?q=showresult&what=%22TC-P42C2%22&kategoria=&kat2=all
It should identify boards and test points, etc.

Some failures are more common than others, so take their conclusions as 'possibilities,' NOT 'iron-clad' guarantees.

Since you admit to being new to this, I suggest a very slow skimming over the 'safety precautions' areas.

"Warning: The Vsus line has large capacitors that hold the charge for some time even after the TV has been turned off and unplugged. When disconnecting P2/SC2 or P11/SS1, bleed the remaining charge of the Vsus before reconnecting the cable.
Use a 500 ohms/ 5W (At least) resistor to discharge the Vsus line before reconnecting P2/SC2 or P11/SS11."
playab0yyy



Joined: 08 Dec 2014
Posts: 13
Location: Tampa, FL

PostPosted: Mon Dec 08, 2014 4:45 pm    Post subject: Reply with quote

Can you point me in the direction of learning how to "bleed" the remaining charge?
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JTS1957



Joined: 21 Jan 2009
Posts: 2340
Location: Far, Far Away

PostPosted: Mon Dec 08, 2014 6:33 pm    Post subject: Reply with quote

playab0yyy wrote:
Can you point me in the direction of learning how to "bleed" the remaining charge?


Being sure TV is OFF/Unplugged ... "Use a 500 ohms/ 5W (At least) resistor to discharge the Vsus line."
Connect one end of said resistor to chassis ground and the other to Vsus (first on Vsus of the connector {supply side}, then to Vsus of the plug {load side}). That should prevent any of those nasty bright sparks/loud pops.
playab0yyy



Joined: 08 Dec 2014
Posts: 13
Location: Tampa, FL

PostPosted: Tue Dec 09, 2014 12:18 pm    Post subject: Reply with quote

I just replaced the SS board (TNPA5072AC). Before, I was getting the following k ohm readings...

Q001 w/ red on top = 0.328
Q001 w/ black on top = 0.322
Q002 w/ red on top = 0.342
Q002 w/ black on top = 0.336
Q021 w/ red on top = 47.0
Q021 w/ black on top = 47.0
Q022 w/ red on top = 47.0
Q022 w/ black on top = 47.0

I now get 46.9 or 47 k ohms at all transistors on the SS board. However, after turning on the tv, I still get 10 red blinks. Sad Any other ideas?
JTS1957



Joined: 21 Jan 2009
Posts: 2340
Location: Far, Far Away

PostPosted: Tue Dec 09, 2014 1:20 pm    Post subject: Reply with quote

Restore the TV to the condition it was in when when you first removed the rear cover.

"Check the SD card slot for metal objects. Check also for bended pins. Make sure that connector P6 on the P board is properly connected. Unplug the TV and remove connectors SS11 from the SS board and SC2 from the SC board. Plug in the TV and press the power switch.
Does the number of blinks changes to 7 blinks?"
playab0yyy



Joined: 08 Dec 2014
Posts: 13
Location: Tampa, FL

PostPosted: Tue Dec 09, 2014 4:41 pm    Post subject: Reply with quote

This probably sounds stupid, but I cannot find SC2. I'm aware of the P board, A board, S board, SS board, SN board, C1 board, and C2 board. Where is SC2?
playab0yyy



Joined: 08 Dec 2014
Posts: 13
Location: Tampa, FL

PostPosted: Tue Dec 09, 2014 5:15 pm    Post subject: Reply with quote

On slide/page 17 of the manual you're referencing, it states that the SU, SD, and SC boards have been combined into the SN board. I believe SN2 would be the replacement for SC2 in my tv. So, I unplugged SS11 and SN2 and YES, I got 7 blinks.
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