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Author Topic: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d  (Read 538 times)

Offline ™Vensh®w™

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B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« on: February 07, 2012, 12:01:02 PM »
sis tanong lang gusto ko mag voltage testing sa b+ ilang voltahin rin at saan ito makita na pin sa FBT? may naka lagay bang b+ or number lang? tnx
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Whenever you're working on any electronic equipment, your own safety has to come first.Every electronic technician must always take safety precautions before he or she starts work.Electricity must be handled properly, are else it can injure or cause fatal.

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B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« on: February 07, 2012, 12:01:02 PM »

Offline Deantyne

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #1 on: February 07, 2012, 12:42:18 PM »
sis from main Chopper transformer (psu) ,may RU2 diode don which supplies around 180volts dc going to pin of FBT -ito yong B+ ng fbt, winding connected to Collector of Hor.output xsistor..
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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #1 on: February 07, 2012, 12:42:18 PM »

Offline marcialnasi

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #2 on: February 07, 2012, 01:27:55 PM »
sis depende sa model at design ng tv yan..at depende rin sa gamit na regulator..to check b+ mas maganda kung me diagram ka para indicated kung ilang volts dapat sa bawat tp..kung mag rerely ka naman sa regulator usually naka indicate sa ic ng regulator kung ilang volts dapat..ex..str50103..b+ 103 volts..str50115..b+ 115 volts..str50135..b+135 volt..ang problema me mga ic na bumabase sa feedback ckt ng PSU as refference ng output or b+..like ix1791..strsXX..strwXX..schematic plus expirience pa rin sis.
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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #2 on: February 07, 2012, 01:27:55 PM »

Offline ???

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #3 on: February 07, 2012, 01:29:33 PM »
Parang kasundo yan ng Collector pin ng HOT(B+). Tama po ba sis marcial?
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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #3 on: February 07, 2012, 01:29:33 PM »

Offline marcialnasi

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #4 on: February 07, 2012, 01:36:36 PM »
Quote from: jacks on February 07, 2012, 01:29:33 PM
Parang kasundo yan ng Collector pin ng HOT(B+). Tama po ba sis marcial?
agree sis..
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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #4 on: February 07, 2012, 01:36:36 PM »

Offline ™Vensh®w™

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #5 on: February 07, 2012, 04:31:05 PM »
ic ok.. mga sis mas maganda pala kong may diagran tama agree din ako... para doon sa mapa makita yong volts na dadaloy..... depende pala yan sa regulator din.. ok mga sis thanks sa mga info nyo ha.. big help talaga iton forum na ito sa elab dah.. tnaks.... learning..
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Offline x13r_kit_0

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #6 on: February 07, 2012, 06:01:43 PM »
^^sundan mo lang lagi ang sec output ng chopper measure ka sa cathode side ng diode..kung susundan mo nakakonek yan sa positive pin ng B+ ecaps usually 160v at connected din yan sa hinahanap mong fbt pin..

may mga board na na nakaprint ang mga pins ng mga component.testpoints at mga required voltage..marami din ang wala..

tama sa taas kung may mapa..syempre andun na lahat ng sagot..
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Offline RhUNhA

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #7 on: February 07, 2012, 07:31:05 PM »
Quote from: x13r_kit_0 on February 07, 2012, 06:01:43 PM
^^sundan mo lang lagi ang sec output ng chopper measure ka sa cathode side ng diode..kung susundan mo nakakonek yan sa positive pin ng B+ ecaps usually 160v at connected din yan sa hinahanap mong fbt pin..

may mga board na na nakaprint ang mga pins ng mga component.testpoints at mga required voltage..marami din ang wala..

tama sa taas kung may mapa..syempre andun na lahat ng sagot..


ganito din ang gawa ko...pero mas ok tlaga kung may schema ka para hindi maligaw
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Offline NORTH LUZON

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #8 on: February 07, 2012, 08:14:48 PM »
pag sinabi mo na b+ yan at tv ang units mo means ung boltahe na papunta ng hot ang tinutukoy mo,ndi kasi pwde na b+ ng vert ckt kundi vcc ang tamang tawag dun.
masusukat mo ito dun mismo sa pangalawang ecap na malaki at nasa secondary na ito ng chopper or pulse transformer.
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Offline turotoknis

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #9 on: May 22, 2012, 01:53:22 PM »
ganun pla yun.... mtry nga
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Offline kaholito

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #10 on: August 04, 2012, 09:34:56 PM »
ang problema po mga master saan makakuha ng diagram ng tv ung libre sa internet.? ???
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Offline TBG

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #11 on: August 05, 2012, 07:19:32 AM »
sa secondary ng chopper transformer may makikita kang diode  at capacitor ,,,makikita mo kung ilang volts ang rating ng capacitor.pwede yan ang

pagbabasehan mo
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Offline NORTH LUZON

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #12 on: August 05, 2012, 06:23:38 PM »
Quote from: ™Vensh®w™ on February 07, 2012, 12:01:02 PM
sis tanong lang gusto ko mag voltage testing sa b+ ilang voltahin rin at saan ito makita na pin sa FBT? may naka lagay bang b+ or number lang? tnx

schematic ang sasagot sa tanong mo sis
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Offline Deantyne

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #13 on: August 21, 2012, 04:09:37 PM »
^aGREE.
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Offline jhuntronics

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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #14 on: August 23, 2012, 05:46:58 PM »
try mo test bawat pin ng fbt .. ohms ang range kung alin ang 0 reading yun ang b+ ng fbt..
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Re: B+ voltage testing were to find ? anong pin nito mga sis ilang volts dapat d
« Reply #14 on: August 23, 2012, 05:46:58 PM »
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