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Author Topic: sharp primo 20v-l70m no power,no oscillation, led lit  (Read 1148 times)

Offline sodz

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sharp primo 20v-l70m no power,no oscillation, led lit
« on: May 10, 2012, 03:55:13 PM »
helo mga master,bagohan po sa electronics sana matulungan, may ni repair ako sharp 20v-l70m chassis
ayaw po mag power heto po condition after volt teasting,

secondary volt
b+ 135v, 7v at 11v

jungle tda9387 vcc pin 56 = 3.3v pin 61 =3.3 v

fbt secondary
no voltage

hot base voltage =zero volt

na try ko na mag load ng 100w bulb ok ang psu
tumaas konti ang secondary output
b+ 145v, 8v and 13v na sya

d ko matumbok. ano po salarin? pahelp naman po? TIA
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sharp primo 20v-l70m no power,no oscillation, led lit
« on: May 10, 2012, 03:55:13 PM »

Offline DSM_elektronix_shop

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #1 on: May 10, 2012, 04:17:27 PM »
check supply ng jungle..
check supply ng hdt driver sa collectotr..
check eeprom supply 5v
check kung umiilaw pa led stanby led..

nagooscillate ba sa first on?o gumagana ba ang tv a few seconds...kung nagooscxillate sya  ng 5sec check mo vertical ic kung nagkakasuply o kaya check mo vert ic kung sira na....

resoldr muna baka loscon pa ang main board mo...checxk possible shorted zener or possible burned resistor or open resistor...
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DSM_electronics_shop
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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #1 on: May 10, 2012, 04:17:27 PM »

Offline MX45

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #2 on: May 10, 2012, 04:42:22 PM »
Quote from: DSM_elektronix_shop on May 10, 2012, 04:17:27 PM
check supply ng jungle..
check supply ng hdt driver sa collectotr..
check eeprom supply 5v
check kung umiilaw pa led stanby led..

nagooscillate ba sa first on?o gumagana ba ang tv a few seconds...kung nagooscxillate sya  ng 5sec check mo vertical ic kung nagkakasuply o kaya check mo vert ic kung sira na....

resoldr muna baka loscon pa ang main board mo...checxk possible shorted zener or possible burned resistor or open resistor...



agree.. check mo muna ang mga ito. lalong lalo na yung 5V standby
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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #2 on: May 10, 2012, 04:42:22 PM »

Offline pEN DoTA

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #3 on: May 10, 2012, 05:17:39 PM »
umiilaw ba yung LED sis?
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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #3 on: May 10, 2012, 05:17:39 PM »

Offline ultrasonic™

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #4 on: May 10, 2012, 05:17:52 PM »
agreed din ako...
pero mas refer ko yung supply ng jungle/UOC Hvcc
lagi kasi yang nawawala sa ganitong chassis ;D
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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #4 on: May 10, 2012, 05:17:52 PM »

Offline envader

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #5 on: May 11, 2012, 08:01:41 AM »
sis, kong nagawa mo na ang advice ng nasa taas at wala p rin ay hagilapin mo protection circuit baka active ito, nag oscillate ba then auto shut off?
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Offline DSM_elektronix_shop

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #6 on: May 11, 2012, 10:06:28 AM »
wala na ts ano kaya update
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Offline sodz

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #7 on: May 12, 2012, 06:40:24 PM »
mga master salamat sa reply, d ako naka online kahapon, may importanting lakad

tapos napo ako nag resolder..,hindi po nag oscillate.., mayron naman po supply 5v standby..

naka ilaw ang led...pero walang supply sa vertcal..
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Offline sodz

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #8 on: May 12, 2012, 07:10:16 PM »
sis, hindi sya nag oscillate, walang 8v sa output ng reg ic, at wala boltahe sa hdt collector

ano kaya posible salarin, saan po banda ang protection circuit, bagohan pa kasi ako,,
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Offline pete

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #9 on: May 12, 2012, 07:26:47 PM »
Quote from: sodz on May 12, 2012, 07:10:16 PM
sis, hindi sya nag oscillate, walang 8v sa output ng reg ic, at wala boltahe sa hdt collector

ano kaya posible salarin, saan po banda ang protection circuit, bagohan pa kasi ako,,

kadalasan vert. problem actual palit ng vert. ic

check/replace eeprom
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Offline sodz

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #10 on: May 12, 2012, 07:53:46 PM »
thanks sir pete at mga master update ko nalang kayo,

actual replace nalang muna vert at eeprom yun ang din hula ko,,tia
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Offline Disabled

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #11 on: May 13, 2012, 03:06:17 PM »
protect?
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Offline Tripler02

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #12 on: May 13, 2012, 04:28:48 PM »
pwede matanung fbt # nito ts?
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Offline ping

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #13 on: May 13, 2012, 06:45:25 PM »
pahelp man poh sharp 20v-L70M no power noh indcator
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Offline brucetech

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #14 on: May 13, 2012, 07:17:20 PM »
sis gawa ka ng bagong thread...
 mukhang naka protect nga to...
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Offline pete

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #15 on: May 13, 2012, 09:40:40 PM »
Quote from: Tripler02 on May 13, 2012, 04:28:48 PM
pwede matanung fbt # nito ts?
pa OT

T602
FO228PE
FO230PE
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Offline Tripler02

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #16 on: May 13, 2012, 09:47:05 PM »
Quote from: pete on May 13, 2012, 09:40:40 PM
pa OT

T602
FO228PE
FO230PE
for 20 and 21inch ba to respectively sis?502+1=503
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Offline alphavic

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #17 on: May 13, 2012, 10:11:50 PM »
vertical, x prot=ABL sec., eeprom pagpilian mo lang baka makachamba ;D ;D
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Offline pEN DoTA

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #18 on: May 13, 2012, 11:29:46 PM »
check vertical section.
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Offline J@M

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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #19 on: May 14, 2012, 01:17:59 AM »
Vertical din ako
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Re: sharp primo 20v-l70m no power,no oscillation, led lit
« Reply #19 on: May 14, 2012, 01:17:59 AM »
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