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Author Topic: JVC AV-21CA17B CAN NOT POWER ON  (Read 859 times)

Offline josayu

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JVC AV-21CA17B CAN NOT POWER ON
« on: June 04, 2010, 03:34:18 PM »
gandang araw, patulong po ako, JVC-21CA17B model. may standby power po kya lang pag ON nag k click 3x ang relay, after that mag b blink na ang red led.

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JVC AV-21CA17B CAN NOT POWER ON
« on: June 04, 2010, 03:34:18 PM »

Offline pete

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #1 on: June 04, 2010, 03:43:36 PM »
ano na po ang nagawa nyo?

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #1 on: June 04, 2010, 03:43:36 PM »

Offline nath630

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #2 on: June 04, 2010, 04:00:34 PM »
Kaalamang Teknikal,'wag ipangalandakan...
Babagsak, Dangal ng Teknisyan.

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #2 on: June 04, 2010, 04:00:34 PM »

Offline josayu

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #3 on: June 04, 2010, 04:13:03 PM »
first time ko kc maka incouter ng ganitong trouble, check ko na ang hori transistor ok check ko na rin base to emmeter voltage ng transis tor (2vac), every click mg relay up and down, up and down din cya.

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #3 on: June 04, 2010, 04:13:03 PM »

Offline MX45

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #4 on: June 04, 2010, 04:29:16 PM »
TS.. Relay saan ckt yun sa B+ ba o sa Deguasing coil? hindi kc masilip yung ckt ala kasi akong schematic nito eh.
Gawin mo ang nais mo, sundin mo ang gusto mo dahil ikaw o ang sarili mo ang hari ng yung kagustuhan...

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #4 on: June 04, 2010, 04:29:16 PM »

Offline josayu

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #5 on: June 04, 2010, 04:32:31 PM »
sinubukan ko na ring tangalin ang FBT kasama ang transisto nya ganun parin. ang system my supply kasi my standby indicator. di ko plang na check yung sa chromma. Quad array SMT type kasi ang IC nito.

Offline pete

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #6 on: June 04, 2010, 04:33:44 PM »
hung mo ang HOT tapus sukatan mo ang B+ para malaman natin kong normal ang B+ kong walang load

Offline josayu

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #7 on: June 04, 2010, 04:35:14 PM »
TS.. Relay saan ckt yun sa B+ ba o sa Deguasing coil? hindi kc masilip yung ckt ala kasi akong schematic nito eh.

ang relay nsa deguasing cya.

Offline josayu

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #8 on: June 04, 2010, 04:39:13 PM »
hung mo ang HOT tapus sukatan mo ang B+ para malaman natin kong normal ang B+ kong walang load

115vdc kaya lan tumitiklop sya sa 100vdc pag pumipitik ang relay:(note: tanggal ko na ang deguasing coil)

Offline MX45

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #9 on: June 04, 2010, 04:48:05 PM »
ang relay nsa deguasing cya.



ahh base sa na encounter kung problem na ganyan sa primary power supply ang problema. check mo yung Zener diode kung meron yan, at replace mo narin yung mga E-cap sa primary..
Gawin mo ang nais mo, sundin mo ang gusto mo dahil ikaw o ang sarili mo ang hari ng yung kagustuhan...

Offline pete

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #10 on: June 04, 2010, 04:50:46 PM »
small ecap sa primary at secondary isama mona rin, pati narin coldsold

Offline josayu

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #11 on: June 04, 2010, 07:00:47 PM »
ok po mga sir, try ko bukas, gabi na kasi... madilim kc d2 sa lugar namin, update ko nlang kayo bukas... maraming salamat po....

Offline josayu

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #12 on: June 05, 2010, 08:41:02 AM »
up date po sa problema ko sa JVC AV-21ca17B. Pina flyback check ko ung flyback transformer.. weak na daw.... posible ba yun? klangan ko tulong nyo..... mahal ang fly back... HELP... maraming salamat po sa mga tumulong sa akin..

Offline pete

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #13 on: June 07, 2010, 09:21:55 AM »
TS na try moba ang sinabi ko na hung mona ang hot? kasi kong walang hot at bumabagsak parin ang B+ mo ibig sabihin good pa ang FBT mo.

Offline josayu

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #14 on: June 08, 2010, 08:35:39 AM »
TS na try moba ang sinabi ko na hung mona ang hot? kasi kong walang hot at bumabagsak parin ang B+ mo ibig sabihin good pa ang FBT mo.
gadang umaga, sir pete na try ko na i hang yung transistor ang hanggang 110vDC, pag standby 115-120VDC. 

Offline pete

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #15 on: June 08, 2010, 08:53:23 AM »
posible sira na nga ang FBT mo.

Offline ultrasonic™

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #16 on: June 08, 2010, 05:18:58 PM »
compare mu  ang voltage reading  mu...

pag nakaload  at wala naka load ang FBT ?

ilan ang nasusukat mu ?
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Offline philips_avs

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #17 on: June 23, 2010, 04:38:13 PM »
sir little info lang po just to help. FBT po ay n check nyo saan po sa high voltage testing?
if yes . Sir high voltage lang po ang tinetest nun inde yung efficiency nya . madalas sa high voltage testing fail nmn sa efficiency magloloko ang mga sukat mu sa b+ at sa secondary .

Offline pete

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #18 on: June 23, 2010, 04:43:50 PM »
ano nga pala ang secondary regulator nito?

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Re: JVC AV-21CA17B CAN NOT POWER ON
« Reply #18 on: June 23, 2010, 04:43:50 PM »

 

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