Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Q660 - rjk6026
q661 - rjp6065
q402 - 2pg011
q403 - 2pg011
q404 - 2pg011
q422 - 30g123
q423 - 30g123
q424 - 30g123
d865 - 8688

ic501 - m8707fp
ic521 - m8707fp

Ok, I'll add some things to look for assuming these can fail the same as the 4782. Plus I'll need to refresh on your original findings since there's no schmitt inverters or 5v regs replaced

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Everything I replaced was shorted accept q402 and q403. I did them just for good measure. The driver ICs, I don't know if they were shorted or not, but I know it's proper procedure to replace them with the other components.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Everything I replaced was shorted accept q402 and q403. I did them just for good measure. The driver ICs, I don't know if they were shorted or not, but I know it's proper procedure to replace them with the other components.

yep, mine had issues with Ic521, R521,522 were burnt open cct, also meant IC561,562 were blown and Q551 was a casualty, will take me some time to analyse the 2 boards.

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I'll check those resistors when I get up. Got to get a few hours of sleep now. Thanks for the help.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

bad
Q660 - rjk6026
q661 - rjp6065

ok
q402 - 2pg011
q403 - 2pg011
q404 - 2pg011

Ok

q422 - 30g123
q423 - 30g123
q424 - 30g123

ok
d865 - RF101L4S

ok
ic501 - m8707fp

bad
ic521 - m8707fp

I found that not all the IGBTs short across all 3 pins, some only showed short across 2 pins, had to check all combinations of the 3 legs.

P-fet can blow open cct although I've found thses will run with that faulty open cct. have a close look at the casing and see if it's cracked.

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Will do. I bought one of those Andonstar USB microscopes last week, it comes in real handy for inspection. Wish it had a couple more inches of focal distance, but I am able to solder under it. Well worth the $60

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Will do. I bought one of those Andonstar USB microscopes last week, it comes in real handy for inspection. Wish it had a couple more inches of focal distance, but I am able to solder under it. Well worth the $60

you love your toys, I should get more gear to make life easier.

Here's my list from 2 boards. I've had a quick look everything i can see does correlate to the 4844 location, parts and cct wise. Some of these I just replaced and were probably ok. My first board did go from 6 to 7

Q661 RJP6065, shorted_. Used RJP63f3A
Q660,601, RJK6026 ... 1 board only had 601 bad, used STP10NK60ZFP
Q818 2SK3018, used 2N7002, probably ok but I always do this one
Q702 2PD601 was short,
Q701 MMBTA92, not sure so replaced
IC773 TC7SH14F was shorted Vcc-gnd(41ohms),

Q441,451 shorted

Replaced all 78L05 regs, IC771 was bad, IC724,725 seemed ok
Replaced all TC7SH14F _ IC773 bad , others looked ok, IC464,465,564
Replaced TC7SH00FU - IC691 NAND, was ok i believe
Replaced IC521 M81707FP,was bad used M81737FP which is same pinout higher current output
Replaced Q551 was bad
R521,522 burnt open
IC561,562 damaged, only 500ohms pins 10-20 (bad)
Replaced D618,652 ..shorted, track at d618 burnt open cct needed repair
D608 12v zener open cct
Q604 open cct, casing cracked open
R613 47K burnt, was open cct

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

This is a 4782 kit with 34 parts looks to be the SJ kit

R606 10KOHM 0.25W
R696 2.2ohm 5W
Q661 RJP6065
D618 RF101L4S
D619 RF101L4S
D865 RF101L4S
Q441 45G127
Q451 45G127
D608 MAZ81200ML (12V 150mW) SSMINI2
Q401 2PG011
Q402 2PG011
Q403 2PG011
Q501 CPH5524
Q502 CPH5524
Q521 CPH5524
Q522 CPH5524
Q421 30G123
Q422 30G123
Q423 30G123
Q601 RJK6026
Q660 RJK6026
IC724 TC7SH14F
IC725 TC7SH14F
IC771 TC7SH14F
IC501 M81707FP
IC521 M81707FP
PC461 PS9817A-2
PC601 PS2701A-1
R506 10 OHM 0.25w , ERJT06J100V
R507 10 OHM 0.25w , ERJT06J100V
R551 10 OHM 0.25w , ERJT06J100V
IC464 TC7SH14F
IC465 TC7SH14F
IC773 TC7SH14F

[newtothis]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Will do. I bought one of those Andonstar USB microscopes last week, it comes in real handy for inspection. Wish it had a couple more inches of focal distance, but I am able to solder under it. Well worth the $60

I bought one recently and yeah they are great, I agree a couple more inches would be great as I inspect BGA work and the extra couple of inches would make it a lot easier!

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I'm going to try to make an adapter lens sometime. I definitely recommend it. I paid about $35 for one of the cheap ones first, waited a month for it to arrive from China, and 5 minutes after I opened it, it found it's way to my trash can. The image quality was horrible, like 1st generation cell phone cameras were, and it literally had to be 1/8 of an inch from what you were trying to inspect. That made it absolutely worthless. The Andonstar is pretty good though. Amazing image quality and, albeit close, there is enough room to solder under it. Field of view sucks under the higher magnifications, but well worth the cost. I've thought about trying to make my own from scratch someday.

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I won't be able to get back on this TV until tomorrow TW2005. I have a couple other projects I need to get out of my shop so I'll have room to work again.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

This is a 4782 kit with 34 parts looks to be the SJ kit

R606 10KOHM 0.25W
R696 2.2ohm 5W
Q661 RJP6065
D618 RF101L4S
D619 RF101L4S
D865 RF101L4S
Q441 45G127
Q451 45G127
D608 MAZ81200ML (12V 150mW) SSMINI2
Q401 2PG011
Q402 2PG011
Q403 2PG011
Q501 CPH5524
Q502 CPH5524
Q521 CPH5524
Q522 CPH5524
Q421 30G123
Q422 30G123
Q423 30G123
Q601 RJK6026
Q660 RJK6026
IC724 TC7SH14F
IC725 TC7SH14F
IC771 TC7SH14F
IC501 M81707FP
IC521 M81707FP
PC461 PS9817A-2
PC601 PS2701A-1
R506 10 OHM 0.25w , ERJT06J100V
R507 10 OHM 0.25w , ERJT06J100V
R551 10 OHM 0.25w , ERJT06J100V
IC464 TC7SH14F
IC465 TC7SH14F
IC773 TC7SH14F

just realised there's at least 1 part not shown, Q702

i would add Q701,702 , 818 to the list. I was wondering why SJ had a count of 35 and this only had 34

also these can get taken out when ic521 shorts out
ic561,562 tc74vhct541a

[mintocomputers]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

thanks for this list.

i have a 4782 on the bench currently.
was 10blink (shorted across sc2), tried quick fet replace only to re-pop 661 and got 7blink
will post my final list of dead parts soon. (q661 x2 + a mess of smd burn-outs)

what is the test method for ic501 and 521?
I have hot air and can remove them.

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

I just replaced them, just in case they were damaged by the other components. My TV is still sitting in my living room waiting for me to get back to it. I've been so busy with my work schedule that I haven't had time.

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

thanks for this list.

i have a 4782 on the bench currently.
was 10blink (shorted across sc2), tried quick fet replace only to re-pop 661 and got 7blink
will post my final list of dead parts soon. (q661 x2 + a mess of smd burn-outs)

what is the test method for ic501 and 521?
I have hot air and can remove them.

just replace them , you might want to recheck the buffer boards now that you had half a go at it just in case. I managed to destroy sd/su boards along the way.

There's a lot of parts to look out for in this and now that you did a partial there's a risk there's bits outside the normal damaged

[mintocomputers]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

buffers pass resistance check(they all tested .5m to 2m higher than the chart) and are staying unhooked until the blinks go away.

is the SJ kit the best place to source all of these surface mounts?
(http://www.shopjimmy.com/panasonic-t...repair-kit.htm)

my board also has a shorted d407 (marked 3n). what are they?

[tw2005]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

buffers pass resistance check(they all tested .5m to 2m higher than the chart) and are staying unhooked until the blinks go away.

is the SJ kit the best place to source all of these surface mounts?
(http://www.shopjimmy.com/panasonic-t...repair-kit.htm)

my board also has a shorted d407 (marked 3n). what are they?

service manual tells you, but if you're concerned pull it out and retest. there's only 114ohms across mine, so my diode check gives me a double beep but 114 ohms will give a contiuous beep on my fluke

MA22D3900L, DIODE SCHOTTKY 40V 1.57A MINI2

[lookimback]

Re: Panasonic TC-P42S1 10 blinks, bad SC maybe solved.

Finally got back to this. Was really dreading it, but it wasn't as bad as I expected. None of the components I replaced before are bad. Still took me about 3 hours to locate everything on your list.

R506 open
R507 open

Q501, Q502, Q521, Q522 maybe shorted across 5 & 3?

IC724 unsure
IC725 shorted
IC771 unsure

PC461, PC601 not sure without pulling them. Will just replace.

IC464 Seems ok
IC465 Seems ok
IC773 Shorted 1 & 5

IC561, IC562 not sure how to test.