Hi,
I was just wondering if there was a setting in the service mode to enable numerical values to the brightness, volume ...etc controls?
Thanks in advance
delphiplasma
Member
Last Activity: 09-11-2016, 03:19 PM
Joined: 03-21-2016
Location: Wales
-
Re: Panasonic TX-P37X20B
A quick message to say I purchased a new A board, which fixed the original fault. Thanks so much for the help. -
Re: Panasonic TX-P37X20B Main A board Interchangeable
Hi,
Just an update. I only just got around to replacing the A board and is working fine.
I used the power switch from the old board and soldered to the new board.
Thanks for all your help.Leave a comment:
-
Re: Panasonic TX-P37X20B Main A board Interchangeable
Well, I have purchased the C2 board. Looks like P34 on the PSU board is left 'Open circuit' So, I might just put the switch there.
Flocko...I will be putting my old SS board on e-bay shortly if you are interested in re-building it to sell on?
I hate working on SMD and especially double sided PCBs! As a blast from the past I can remember how I hated working on the old GEC 2110, with their double sided PCBs! It would become a right mess. The only work I have only attempted to do was a modification on the SC board...Leave a comment:
-
Re: Panasonic TX-P37X20B Main A board Interchangeable
Thanks for all the responses. I guess the only option is the C2 board. I see that on the C2 service manual, the power switch is connected to the power board. So, I presume the jumper is to decide which switch option to use? Or is there a jumper on the main board to enable the power to be constantly 'On' when using the side switch power option.
I may just wait for an X20 to appear. I am a bit wary though, after the board I bought caused the demise of the SS and SC board. I don't want a repeat of that happening!Leave a comment:
-
Panasonic TX-P37X20B Main A board Interchangeable
Hi,
So... I have a faulty ‘A' board (THPN0829), which I cannot find a replacement for. So, other alternatives are as follows:
X20 (42inch) – Guess it would only be a case of changing the display size type in the service menu
C2 – Same part number. However, it is missing the side panel functionality and will require an additional wired power switch, which would probably be hard to find.
U20 – Not sure if there would be an option in the service menu to select 37 inch panel
G20 – Not sure if there would be an option in the service menu... -
Re: Panasonic TX-P37X20B
So, got the replacement SS and SC boards and the TV is now working. I have the original A board fault. Looking at the A board that caused the catastrophe the number is tnph0829 2A whereas the one in the set is the same except for the suffix 1A and a square heatsink. Is there any significance with that? As the A board is hard to find would I be able to use a board from another model set or from the 42/50 model?
Also, just to let you know there will probably be an SS board for sale soon on ebay for rebuild purposes. I don't think I will list the SC...Leave a comment:
-
Re: Panasonic TX-P37X20B
So...I have 2 x boards (SC&SS) ordered from E-bay at a good price. Let's hope they aren't duff like the A board I purchased off E-bay.
Think I will compare the bad board and good board 'in circuit' resistance of the devices and report back here with them, as it would probably help to know the 'In-circuit' resistances. It's a pain having to de-solder and re-solder components, putting them at further risk.Leave a comment:
-
Re: Panasonic TX-P37X20B
Okay...with both SC and SS boards disconnected I get seven flashes. I guess both SC and SC boards are faulty, as cannot get 7 flashes with each board independently connected.Leave a comment:
-
Re: Panasonic TX-P37X20B
Thanks. I've been doing some resistance checks on the semiconductor devices, such as the RJP30E's on the SS board and D461, D725 and Q441 on the SC board. When we talk about 'shorts' are they straight 0ohms, or is 0.17ohms - 17ohms okay? I'm testing the devices in circuit. Thanks for the P35 explanation. I will try the P2/P11.
ndLeave a comment:
-
Re: Panasonic TX-P37X20B
What does P35 supply? Can I connect P35 and power up to see if it still passes the green light test, which would definitely condemn the SN/SS boards? Unless, P35 is an auxiliary supply for the SN/SS boards? I'll do some more measurements, but am thinking more likely to be the SN board. Will get back with my results, when I get the time.
Thanks for the invaluable help so far. It's a shame it had to come to this, when the original problem I could have lived with.Leave a comment:
-
Re: Panasonic TX-P37X20B
I have just read the link dick Barton included in the second post. I'll check the resistance at the connectors on the SS and SC board. Altough initial measurements suggest no problems? Maybe the power board is at fault?Leave a comment:
-
Re: Panasonic TX-P37X20B
Sorry, I didn't disconnect the P cables. It passed the test and remained a stable green light.Leave a comment:
-
Re: Panasonic TX-P37X20B
Okay...I disconnected the 3 ribbons to the A board and still get 4 flashes. I checked the resistance of the SC and SS main voltage input terminals and can confirm there are no short circuits. Maybe the supply to the A board has been affected? 15v or 5v??Leave a comment:
-
Re: Panasonic TX-P37X20B
Okay...so I disconnected the right side board and still flashing 4sos. However, after reconnecting right side board and disconnecting left side board I get 2sos. So does this mean that the left side board is duff together with the A board? ThanksLeave a comment:
-
Re: Panasonic TX-P37X20B
Just a quick query, I gather the 4 blink code, which relates to power supply board issue is being caused by the short circuit on the other boards? I suppose if disconnecting those boards, if the led blink remains 4 blinks then it would be a P board issue.Leave a comment:
-
Re: Panasonic TX-P37X20B
Thanks. I wonder if the board I purchased off eBay was actually the cause of the death of the other components or those other components were already on their way out?Leave a comment:
-
Re: Panasonic TX-P37X20B
Okay...So I managed to get a replacement board off E-bay. I put it in last night powered up and it looked like the bars had gone. However, it only stayed powered on for 3 seconds after which it went into standby with the red light flashing a sequence of 4 flashes. Tried powering back on...Green light flashing quickly, then back to the red light sequence. I dropped the old board in and the same thing is happening! Arggggg!!Leave a comment:
-
Re: Panasonic TX-P37X20B
Thanks for the tip. The TV is fine after 2minutes. I'll first confirm issue with hairdryer and then remove the board and clean it up, maybe run solder iron over it. Oven idea is very interesting.Leave a comment:
-
Re: Panasonic TX-P37X20B
Thanks for your help. I was hoping it wasn't the A board, as they are impossible to find. I'll do the confirmation tests as suggested and let you know the results.
Once again, thanks for the quick responses.Leave a comment:
No activity results to display
Leave a comment: