Panasonic TH-50XP70BA

[24mech]

Re: Panasonic TH-50XP70BA

Bummer the 42 inch I've been using while playing with this unit has just started 10 blinking looks like i'm down to the 32 from the bedroom

[tom66]

Re: Panasonic TH-50XP70BA

Model of the 42"? 10 blinks on PZ80 series is well documented, easy fix.

[tw2005]

Re: Panasonic TH-50XP70BA

Hi again tw2005 I'm following the 12 blinks attached, as for TP7 I'm getting 0.1v so does that mean the 15v isn't coming out of the high voltage side then?
if so am I heading back to the MC301, MC201?

So you hooked up the meter first , then turned on TV from scratch and never saw 15V? I would expect 10 blinks?

The steps you mentioned "remove the jumper from SS34 and install it across pins 8 and 10 of P12 "

I'm not seeing that.

[tom66]

Re: Panasonic TH-50XP70BA

No 15V for F15V standby (DVB/tuner mode): 10 blinks - this is most common fault.

15V failing after TV turned on: 2 blinks - often caused by VSUS as PSU will detect VSUS fault, turn off and then main board thinks 15V fault has occurred. Very misleading...

[24mech]

Re: Panasonic TH-50XP70BA

So you hooked up the meter first , then turned on TV from scratch and never saw 15V? I would expect 10 blinks?

The steps you mentioned "remove the jumper from SS34 and install it across pins 8 and 10 of P12 "

I'm not seeing that.

Its in the notes on the picture I uploaded at the bottom of the first page

[tw2005]

Re: Panasonic TH-50XP70BA

Sorry, so focussed on the flow chart. Tunnel vision. Glad you pointed that one out. Looked twice and still did not spot it

[24mech]

Re: Panasonic TH-50XP70BA

no worries tw2005 and yep I connected up my multi meter before plugging in or turning on the set no 15v (its a digital meter so when I get home tonight ill recheck with the hold button set in case its a very brief spike)

[24mech]

Re: Panasonic TH-50XP70BA

No 15V for F15V standby (DVB/tuner mode): 10 blinks - this is most common fault.

15V failing after TV turned on: 2 blinks - often caused by VSUS as PSU will detect VSUS fault, turn off and then main board thinks 15V fault has occurred. Very misleading...

thanks for the info tom if this is the issue how can I confirm it before replacing parts and what should I be looking for where thanks.

I think I need a list of what voltages should be where and when ie a/c pluged in, unit turned off 15v on pin.... that sort of thing.

[24mech]

Voltage checks

Ok, so I've done some voltage tests and here are the findings:-

A/C plugged in and the unit turned off
TP7 no power
P6 no power on any pins
P7 no power pins 1 to 10 and 0.59-0.62v on 11
P12 no power on any except 3 & 9 which have 0.48v
P25 no power on any

A/C plugged in and unit on, blinking 12
TP7 no power
P6 no power on any pins
P7 1 to 8 no power 9 has 0.29v 10 no power and 11 has 0.60v
P12 1&2 no power 3, 0.40v 4 to 8, no power 9, 0.50v and pin 10 has no power
P25 no power on any pins

Ok now the spikes, these happen just at the point of pressing the power button and are very brief

TP7 22v spike
P7 pin 1 16v spike
P12 pin 10 22v spike
P25 pin 9 2v spike

Do these point to any thing in particular or was it a waste of time lol

[24mech]

Re: Panasonic TH-50XP70BA

I looked at this thread
Panasonic TH-42PZ80B - Completely dead again (thanks tn245) so I have removed the caps and rebuilt the unit with interesting results, my 12 blinks has now turned into 10 blinks, so I'm wondering (just out of curiosity) as its not doing 10 blinks, 12 blinks, 10 blinks, 12 blinks if its possible to have more than 1 fault on a unit at the same time? I guess it would show power faults over any other?

interesting though that removing the caps has caused the 10 blinks error on this unit but is the panny repair on the PZ80.... hmm....

I'll be refitting them in the next few days and getting some freeze spray to further diagnose this issue.

I'll post again when I have more info or questions, thanks everyone for you help so far.