Horizontal transistor

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Horizontal transistor

Post by kaholito on Mon Jul 16, 2012 10:03 pm

ano po ba matibay na horizontal transistor number ang dapat lagi tyo merong stock ksi ung iba mabilis masira?mga peke dw un?saka pano natin malalaman ang tamang replacement number ng isang pyesa?saan natin ito makikita?salamat po.


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Re: Horizontal transistor

Post by ultrasonic™ on Wed Jul 18, 2012 11:25 am

kng normal ang hor. osc at B+ supply mu...
normal ang Yoke at FBT, kasali ang mga HV ceramic disk
malamang fake nga ang hot na kinabit...

ang sagot ko sa replacement
mas mataas ang specs mas tatagal

check for the datasheet, mkikita mu doon ang

Vcbo (collector-base voltge)
Vceo (collector-emitter voltge)
Veco (emitter-base voltge)
Ic, Icp at Ib (current ng both collector at base)
power dissipation at speed/time ng hot

ipgcompare mu lng sa ipapalit mu ang pamalit mu...
mas higher mas mainam...
put 2S as a prefix pg reresearch kau sa search engine ng alldatasheet
para mapadali... like 2SD1555, 2SD2499 & etc.

pwde mu din reference ang mga hot na ginagamit sa mga 29" crt tv
like: TT2202, D1555 & etc.

kng wla ka nmang internet sa workplace
like home service.. pkiramdaman mu lng ang body heat/init ng HOT
pg masxadong mainit. di yan tatagal

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Re: Horizontal transistor

Post by kaholito on Wed Jul 18, 2012 4:05 pm

ano po ba nangyayari sa tv pag sira ang hv ceramic disk.ito po ba ung kulay blue na parang botones?o un pong red na matataba mga 1 inch.tnx po.

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Re: Horizontal transistor

Post by batmantech on Wed Jul 18, 2012 8:37 pm

in my own experience pag sira yung kulay blue(varactor) yata twag jan pumuputok lagi yung fuse nia that was bas on my own experience......... pointout share lng

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Re: Horizontal transistor

Post by james on Wed Jul 18, 2012 10:57 pm

ano po ba pagkakaiba ng may protection diode at wala. Parang meron pa pong zener across C-E junction. Tapos yung iba meron parang bleeder na 50 ohms at B_E junction?

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Re: Horizontal transistor

Post by kaholito on Thu Jul 19, 2012 10:57 am

opo nga pra san nga ba nag mga yan?

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Re: Horizontal transistor

Post by ultrasonic™ on Thu Jul 19, 2012 11:37 am

batmantech wrote:in my own experience pag sira yung kulay
blue(varactor) yata twag jan pumuputok lagi yung fuse nia that was
bas on my own experience......... share lng


nku iba ung mga varactor.. sis batman.. gnagamit ang mga device na yan sa mga RF design/tuber ckt like in radio, tv,cellular &
wireless receivers. parametric amplfication,harmonic
generators,voltage controlled oscillators at mrami png iba.

http://www.qariya.com/electronics/images/varactor.jpg

kaholito wrote:ano po ba nangyayari sa tv pag sira ang hv ceramic disk.ito po ba ung kulay blue na parang botones?o un pong red na matataba mga 1 inch.tnx po.

yapz yan ang mga yun.. resin coated caps ang mga yan or metallized-polyester film type.



pg yan ay open or wla sa board.. lalot sa hor. sect. ay aakyat ng kunti ang B+ mu.. yan din ang nagko-control sa horizontal width/wide screen nya.. xa din ang responsible sa timing ng osc. ng fbt kya nga minsan ang tawag ng iba jan ay timing capacitor (^_^

james wrote:ano po ba pagkakaiba ng may protection diode at wala. Parang meron pa pong zener across C-E junction. Tapos yung iba meron parang bleeder na 50 ohms at B_E junction?

ung my mga wlang built-in na damper diode sa loob ng HOT ay good for the board na may external dumper diode sa labas.. pg wlang damp diode sa board at ipipiplit tlgang yan ang ikabit ay msisibakan ka tlga.. tungkol nmn jan sa resistor for biasing purposes yan

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Re: Horizontal transistor

Post by kaholito on Thu Jul 19, 2012 3:29 pm

lahat po ba ng pang bias na resistor mga low resistance?pano po malalaman kung ang isang resistor ay nakabias ang kabit sa board?salamat po dami kong natutunan d2.

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Re: Horizontal transistor

Post by PIEZO on Thu Jul 19, 2012 7:06 pm

kaholito wrote:lahat po ba ng pang bias na resistor mga low resistance?pano po malalaman kung ang isang resistor ay nakabias ang kabit sa board?salamat po dami kong natutunan d2.

they are connected across the base-emitter junction.

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Re: Horizontal transistor

Post by PIEZO on Thu Jul 19, 2012 7:10 pm

ultrasonic™ wrote:
batmantech wrote:in my own experience pag sira yung kulay blue(varactor) yata twag jan pumuputok lagi yung fuse nia that was
bas on my own experience......... share lng


nku iba ung mga varactor.. sis batman.. gnagamit ang mga device na yan sa mga RF design/tuber ckt like in radio, tv,cellular & wireless receivers. parametric amplfication,harmonic generators,voltage controlled oscillators at mrami png iba.

http://www.qariya.com/electronics/images/varactor.jpg

kaholito wrote:ano po ba nangyayari sa tv pag sira ang hv ceramic disk.ito po ba ung kulay blue na parang botones?o un pong red na matataba mga 1 inch.tnx po.

yapz yan ang mga yun.. resin coated caps ang mga yan or metallized polyester film type.
http://i1094.photobucket.com/albums/i453/aelexianempire/HVcap.jpg?t=1342664703

pg yan ay open or wla sa board.. lalot sa hor. sect. ay aakyat ng kunti ang B mu.. yan din ang nagko-control sa horizontal width/wide screen nya.. xa din ang responsible sa timing ng osc. ng fbt kya nga minsan ang tawag ng iba jan ay timing capacitor (^_^

james wrote:ano po ba pagkakaiba ng may protection diode at wala. Parang meron pa pong zener across C-E junction. Tapos yung iba meron parang bleeder na 50 ohms at B_E junction?

ung my mga wlang built-in na damper diode sa loob ng HOT ay good for the board na may external dumper diode sa labas.. pg wlang damp diode sa board at ipipiplit tlgang yan ang ikabit ay msisibakan ka tlga.. tungkol nmn jan sa resistor for biasing purposes yan

sir you didn't include the main purpose of the damper.

Damper diodes were designed to clip the negative "ringing" pulse appearing across a TV set's horizontal deflection coil during the retrace interval. Dampers must be able to handle relatively high peak currents and high reverse voltages without arc-over. Since the cathode of such tubes is usually floating above ground and sees very high-voltage peaks, running the damper on the same filament supply as the rest of the tubes in a TV set requires that the damper have its heater very well-insulated from the cathode.

The damper diode can be found built into the HOT or in the circuit. Because of the high inductance and interwinding capacitance of the yoke and flyback transformer, the circuit must be damped out during retrace to prevent ringing. In other word, the damper is used to prevent oscillation in electronic circuit.





Note: Ringing means unwanted oscillation of a signal.

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Re: Horizontal transistor

Post by james on Thu Jul 19, 2012 9:15 pm

Ganun po pala iyon. Galing naman.

para rin po ba yang tulad sa relay kapag walang damper diode meron back emf yun po ang sinusuppress?

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Re: Horizontal transistor

Post by ultrasonic™ on Mon Jul 23, 2012 2:25 pm

ultrasonic™ wrote:
nku iba ung mga varactor.. sis batman..
gnagamit ang mga device na yan sa mga RF design/tuber ckt like in radio,
tv,cellular &
wireless receivers. parametric amplfication,harmonic
generators,voltage controlled oscillators at mrami png iba.

correction tuner pla yan at hndi tuber. sori typo error..


PIEZO wrote:
kaholito wrote:lahat po ba ng pang bias na resistor mga low resistance?pano po malalaman kung ang isang resistor ay nakabias ang kabit sa board?salamat po dami kong natutunan d2.

they are connected across the base-emitter junction.

agreed agreed. para sa akin minsan nglalaro ang mga value na yan sa 30 -50 ohm

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Re: Horizontal transistor

Post by Electro on Wed Jul 25, 2012 4:40 pm

ultrasonic™ wrote:
batmantech wrote:in my own experience pag sira yung kulay
blue(varactor) yata twag jan pumuputok lagi yung fuse nia that was
bas on my own experience......... share lng


nku iba ung mga varactor.. sis batman.. gnagamit ang mga device na yan sa mga RF design/tuber ckt like in radio, tv,cellular &
wireless receivers. parametric amplfication,harmonic
generators,voltage controlled oscillators at mrami png iba.

http://www.qariya.com/electronics/images/varactor.jpg

kaholito wrote:ano po ba nangyayari sa tv pag sira ang hv ceramic disk.ito po ba ung kulay blue na parang botones?o un pong red na matataba mga 1 inch.tnx po.

yapz yan ang mga yun.. resin coated caps ang mga yan or metallized-polyester film type.



pg yan ay open or wla sa board.. lalot sa hor. sect. ay aakyat ng kunti ang B+ mu.. yan din ang nagko-control sa horizontal width/wide screen nya.. xa din ang responsible sa timing ng osc. ng fbt kya nga minsan ang tawag ng iba jan ay timing capacitor (^_^

james wrote:ano po ba pagkakaiba ng may protection diode at wala. Parang meron pa pong zener across C-E junction. Tapos yung iba meron parang bleeder na 50 ohms at B_E junction?

ung my mga wlang built-in na damper diode sa loob ng HOT ay good for the board na may external dumper diode sa labas.. pg wlang damp diode sa board at ipipiplit tlgang yan ang ikabit ay msisibakan ka tlga.. tungkol nmn jan sa resistor for biasing purposes yan

ha bantog ra master pag kana ang daot pirmente ko madautan og horizontal

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Re: Horizontal transistor

Post by batmantech on Thu Jul 26, 2012 3:50 pm

si master electro pwede man yata magtagalog yan horap intindihihn eh

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Re: Horizontal transistor

Post by ultrasonic™ on Mon Jul 30, 2012 7:54 pm

batmantech wrote:si master electro pwede man yata magtagalog yan horap intindihihn eh



hay nku jeff. strike 2 ka na (^_^


[quote="Electro"]
ultrasonic™ wrote:

ha bantog ra master pag kana ang daot pirmente ko madautan og horizontal

translated: kya pala lagi akng nasisibakan ng HOT

yapz isa yan sa reasons.. kya always aware

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Re: Horizontal transistor

Post by Electro on Thu Aug 02, 2012 11:07 am

sorry talaga master

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Re: Horizontal transistor

Post by ultrasonic™ on Fri Aug 03, 2012 5:08 pm

^ ok lng.. doon nlng tau sa chitcaht mgkwentuhan (^_^

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Re: Horizontal transistor

Post by Oscar on Mon Aug 06, 2012 6:08 pm

salamat mga master. marami pa talaga kaming dapat matutunan

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Re: Horizontal transistor

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