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pipelayer_99
Joined: 06 Jul 2015
Posts: 10
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 Posted: Mon Jul 06, 2015 11:16 pm Post subject: Panasonic tc-p42c2 - 10 blinks |
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My neighbor gave this TV to me and it has the 10 blink issue. I searched around and did some diagnosing. I'm not great with electronics but I like to learn and fix what I can. I have 5v on P7 connector and nothing for 15V on P6.
The TV clicks when turned on but no screen. Only the blinking light by the power button.
Does this mean the power board is bad? or could it still be something else?
Any help is appreciated. |
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JTS1957
Joined: 21 Jan 2009
Posts: 2266
Location: Far, Far Away
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| Posted: Tue Jul 07, 2015 2:13 am Post subject: |
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10 Blinks: Abnormalities of the F+15V.
Reasons:
The P board is not generating the F+15V
SUB Voltages are affected by the K board or by metal object present in the SD card slot..
Shorted Vsus (By the SS board or SC board).
Shorted Vda (By the panel, C1, or C2 board).
Wrong diagnostic by the A board. |
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pipelayer_99
Joined: 06 Jul 2015
Posts: 10
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| Posted: Tue Jul 07, 2015 7:21 am Post subject: |
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I removed the plug from P7 to A6 and still don't get 15V on P7. Can I remove all the plugs from the power board to see if the power is there and if it blinks?
I checked the SD slot and nothing foreign in it.
How would I diagnose the other possible issues? |
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JTS1957
Joined: 21 Jan 2009
Posts: 2266
Location: Far, Far Away
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| Posted: Tue Jul 07, 2015 12:20 pm Post subject: |
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With all else connected normally.
Unplug the TV and remove connectors SS11 from the SS board and SN2 from the SN board.
Plug in the TV and press the power switch - Does the number of blinks change to 7 blinks?
Last edited by JTS1957 on Tue Jul 07, 2015 9:58 pm; edited 1 time in total |
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pipelayer_99
Joined: 06 Jul 2015
Posts: 10
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| Posted: Tue Jul 07, 2015 3:49 pm Post subject: |
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I see the SS11 and the other one is SN2. I'm assuming you want the two wires going from power module to SC and SS disconnected.
I disconnected them both and got 7 blinks.
Last edited by pipelayer_99 on Tue Jul 07, 2015 4:00 pm; edited 1 time in total |
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JTS1957
Joined: 21 Jan 2009
Posts: 2266
Location: Far, Far Away
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| Posted: Tue Jul 07, 2015 3:52 pm Post subject: |
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| Reconnect SS11. Plug in the TV and press the power switch - Does the TV shut down with 10 blinks? |
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pipelayer_99
Joined: 06 Jul 2015
Posts: 10
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| Posted: Tue Jul 07, 2015 4:08 pm Post subject: |
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SS11 connected and SC2 disconnected.
Back to 10 blinks |
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JTS1957
Joined: 21 Jan 2009
Posts: 2266
Location: Far, Far Away
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| Posted: Tue Jul 07, 2015 5:15 pm Post subject: |
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Sorry. Doing two Panasonic plasmas simultaneously is confusing me. The fact that I work on 10 times more LCD sets than Plasmas isn't helping either.
Tech Manual I found covers multiple models. Service Manual shows 'SN' (SC/SD/SU combined) is correct.
SS board?
Let's try this, with everything connected normally, back-probe SS11 or SN2 (or P11 or P2) with DVM on ohms. What reading do you get? |
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pipelayer_99
Joined: 06 Jul 2015
Posts: 10
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JTS1957
Joined: 21 Jan 2009
Posts: 2266
Location: Far, Far Away
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| Posted: Tue Jul 07, 2015 6:36 pm Post subject: |
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PCB #s - I'm aware of layout .
SN = TXNSN1LFUU
SS = TXNSS1LFUU
With everything connected is there a close to zero ohm reading at any point on the VSUS line?
Previous: Let's try this, with everything connected normally, back-probe SS11 or SN2 (or P11 or P2) with DVM on ohms. What reading do you get? |
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