PSU TEST ON TV7001-ZC02-01 BOARD
Just reaching out. Anyone know how to test PSU without main board . Trying to test backlights.
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Voltages on PSU board with main board and led disconnected:
3 large main caps - 380v DC
CON201
GND
ADJ -
BK -
+5V - Not Connected
PSON -
+5VSB - Not Connected
NC - Not Connected
ND - Not Connected
GND
GND
GND
+12V - 11v
+12V - 11v -
Brand and full model of tv?Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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ONN 70 INCH. Model 100068378Comment
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With everything hooked up as normal, what voltages do you get on PSON and BK, test in standby[tv plugged in but off] then keeping probes where they are turn tv on then what are they, other words do the voltages change/toggle when you do it and are they steady?Last edited by nomoresonys; 12-07-2023, 01:21 PM.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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First test:
Leads placement:
black on frame ground
red on bk connection
voltage is .1vdc in standyby
red lead on pson
voltage is 2.0vdc to 2.5vdc it flucuates in standby
pushing power switch they are no change in any voltage
Second test:
Leads placement:
black on bk
red on pson
voltage is 2.0vdc to 2.5vdc. it flucuates. in standby
pushing power switch they are no change in any voltage
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No, for second test it is black on frame ground red on BK.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Leads placement:
black on frame ground
red on BK connection
voltage is .1vdc in standyby
pushing power switch they are no change in any voltageComment
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Check the diodes on top of the board, looks like there's six, diode checking is done with tv unplugged from power. Another easy test, with everything hooked up heat the electrolytic caps with a hairdryer for a couple minutes then try turning on tv, see if there's any difference if only for a bit.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Also check those two resistors, maybe switch out EC201 right by the connector if you have one handy and no way to test the caps.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Quite often when you have those fluctuating voltages it's because of a faulty capacitor.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Thanks . Already replaced the LED Capacitor (EC210).Will test furtherComment
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Results from following test:
4 diodes- D203-D206= .398 they all read same. good
2 blue caps :C338=202PF(replaced with 221pf) good now. C133= 102PF (GOOD)
EC210- 5UF REPLACED- READING IS 10UF NOW.
EC201 - (448UF) REPLACED -READING IS 470UF NOW.
VOLTAGE READINGS.
BEFORE CHANGED THE 4 DIODES READING:
D203 =5DCV
D206= 5DCV
D205=320DCV
D204=320DCV
VOLTAGE READINGS.
AFTER PARTS REPLACED, THE 4 DIODES READING:
D203 =25-45DCV- FLUCTUATING
D206= 25-45DCV FLUCTUATING
D205=320DCV
D204=320DCV
Leads placement:
black on frame ground
red on bk connection
voltage is .1vdc in standyby
pushing power switch they are no change in any voltage
red lead on pson
voltage is 2.3vdc to 2.5vdc it flucuates in standby but not as bad.
pushing power switch they are no change in any voltageAttached FilesComment
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Ok, maybe try it as stand alone, how I do it is unplug cable from powerboard to mainboard on mainboard side leave unplugged for test, use about 1k resistors will need 2 or 3 of them, plug a resistor from 5VSB to PSON, 5VSB to BK and plug in power cord, see if proper steady voltages come up and backlights come on, if not add the third resistor from 5VSB to ADJ and try it.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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Use the resistors, they will protect things in case something gets hooked up wrong.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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This board don't have 5Vbs. Well it don’t produce 5vdc.Attached FilesLast edited by itronic; 12-08-2023, 05:07 PM.Comment
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I manually put 5vdc to ADJ, BK, PSON. Plug power in and backlights will blink and go back off.Comment
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If your saying you don't have standby voltage on the powerboard, then I think you need to fix that first, thinking you should surely have standby or the board won't work correctly, so with the mainboard and backlights unhooked you have no voltage on the 5VSB pin?Last edited by nomoresonys; 12-09-2023, 10:06 AM.Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.Comment
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UPDATE. TV IS WORKING FIND NOW.
Tv is power on and working. voltage is steady
VOLTAGE READINGs
THE 4 DIODES READING:
D203 =135DCV
D206= 135DCV
D205=270DCV
D204=270DCV
Big Caps 382v
led 115v on each
CON201
ADJ- 2.27VDC
BK- 3.02VDC
PSON- 3.32VDC
+12V- 12VDC
REPLACED:
R355,R002,C338,EC210,EC201
THANKS FOR THE HELP nomoresonys AND lotas Last edited by itronic; 12-09-2023, 10:17 AM.Comment
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