Toshiba 42WH18P


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Toshiba 42WH18P

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rinnor
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May 15, 2015, 2:03 PM

Post #1 of 10 (1496 views)
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Toshiba 42WH18P	Can't Post

I have a toshiba 42wh18p, it keeps wrecking these 2 transistors: b1016 and d1407.

Any idea what is wrong with it?

jts1957
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May 15, 2015, 2:54 PM

Post #2 of 10 (1493 views)
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Re: [rinnor] Toshiba 42WH18P [In reply to]	Can't Post

AGAIN:

Where? Location numbers? &/or circuit?

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Location: Far, Far Away

rinnor
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May 16, 2015, 1:38 PM

Post #3 of 10 (1474 views)
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Re: [jts1957] Toshiba 42WH18P [In reply to]	Can't Post

In Reply To

AGAIN:

Where? Location numbers? &/or circuit?

Q717 AND Q718

jts1957
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May 16, 2015, 2:47 PM

Post #4 of 10 (1473 views)
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Re: [rinnor] Toshiba 42WH18P [In reply to]	Can't Post

Q717 23205109 TRANSISTOR, NPN VCBO=100V KTC2028-Y

Q718 23205107 TRANSISTOR, PNP VCBO=-100V KTA1049-Y

Wrong transistors, bad drive, bad bias, wrong VCC, bad convergence yoke

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Location: Far, Far Away

rinnor
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May 16, 2015, 4:04 PM

Post #5 of 10 (1471 views)
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Re: [jts1957] Toshiba 42WH18P [In reply to]	Can't Post

The transistors are fabrically made, nobody changed them before.
Can you send me the diagram schematic cause I don't seem to find it anywhere.

It got 6 x B1016 and 6 x D1407.

(This post was edited by rinnor on May 16, 2015, 4:08 PM)

jts1957
Veteran

May 16, 2015, 5:07 PM

Post #6 of 10 (1465 views)
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Re: [rinnor] Toshiba 42WH18P [In reply to]	Can't Post

http://www.electronica-pt.com/.../func-fileinfo/7628/

There are 4 each of # I mentioned. Lower down there are 2 each of # YOU mentioned (but that would be wrong location numbers).

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Location: Far, Far Away

(This post was edited by jts1957 on May 16, 2015, 5:25 PM)

rinnor
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May 16, 2015, 5:27 PM

Post #7 of 10 (1459 views)
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Re: [jts1957] Toshiba 42WH18P [In reply to]	Can't Post

Thank you for the schematic.

What about those transistors, they were never changed before, it is fabrically made like that but for some reason they keep getting burned.

jts1957
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May 16, 2015, 5:31 PM

Post #8 of 10 (1458 views)
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Re: [rinnor] Toshiba 42WH18P [In reply to]	Can't Post

What is 'fabrically made'? Also see Edit above.

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Location: Far, Far Away

rinnor
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May 17, 2015, 10:28 AM

Post #9 of 10 (1445 views)
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Re: [jts1957] Toshiba 42WH18P [In reply to]	Can't Post

I mean, they are the original transistors, nobody changed them. For some reason they keep getting burned.

jts1957
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May 17, 2015, 11:25 AM

Post #10 of 10 (1430 views)
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Re: [rinnor] Toshiba 42WH18P [In reply to]	Can't Post

"bad drive?, bad bias?, wrong VCC?, bad convergence yoke?"

Wonder why the parts list/schematic has Blue yoke with one types and Red & Green yokes as other types?

We are saying that the GH is the only affected (Q717/Q718)?
Is + & - VCC's correct? How do other surrounding parts (D's; Q's & R's) check?

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Location: Far, Far Away

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