Ok attempt number two.
Tv Model number:Lg Plasma 2010 60 PK550-AA
With all boards connected in Television. I get the standby red light and intermittent closing of both relays followed by one quick click directly afterwards. When I get the relays to close I have approx 390v dc on the filter capacitors. When the relays don't close I only have 2 volts yet still have the standby light . What I have just noticed is if I discharge the filter capacitors the relays will close every time but it will still make the 3 clicks. Originally I had only 3 to 4 volts on standby but after changing the 3BR1565 JF Standby 5 volt Regulator I now have exactly 5.14v.
I am certain my issue lies on the power board as when I run power supply on it's own I still don't get any other voltages, even with the light bulb in series hooked up too the vs and ground.I also hooked a 100 ohm resistor between pin 14 5volt standby and RL on but still no change to the readings.
Power Board Number is EAY60968901 .
P813
1-2 (17v) 0v
3-4 (Gnd) x
5-7 (5v) 0
8 (Error Det) 4.9v briefly
9-12 (Gnd) x
13-14 (STBY 5v) 5.16v
15 (RL-ON) 0v
16 (AC Det) 4.91 briefly
17 (M5 on) 1.11 volts then disappears quickly
18 Auto Ground 4.87 volts ???
No VA AND NO VS Or M5V or 17V
All Filter Capacitors reach 380volts Dc before discharging.
Question :How come the relays are closing and yet no voltage high or low on RL –ON?
Why does Voltage exist on the Auto Ground pin? Does that mean IC 701 is not doing it's job (submicom on bottom of power board)
Is 380 volts too high for the filter capacitors?
How can I isolate the source of the problem? No obvious shorts and all capacitors tested ok as do both relays.
Tv Model number:Lg Plasma 2010 60 PK550-AA
With all boards connected in Television. I get the standby red light and intermittent closing of both relays followed by one quick click directly afterwards. When I get the relays to close I have approx 390v dc on the filter capacitors. When the relays don't close I only have 2 volts yet still have the standby light . What I have just noticed is if I discharge the filter capacitors the relays will close every time but it will still make the 3 clicks. Originally I had only 3 to 4 volts on standby but after changing the 3BR1565 JF Standby 5 volt Regulator I now have exactly 5.14v.
I am certain my issue lies on the power board as when I run power supply on it's own I still don't get any other voltages, even with the light bulb in series hooked up too the vs and ground.I also hooked a 100 ohm resistor between pin 14 5volt standby and RL on but still no change to the readings.
Power Board Number is EAY60968901 .
P813
1-2 (17v) 0v
3-4 (Gnd) x
5-7 (5v) 0
8 (Error Det) 4.9v briefly
9-12 (Gnd) x
13-14 (STBY 5v) 5.16v
15 (RL-ON) 0v
16 (AC Det) 4.91 briefly
17 (M5 on) 1.11 volts then disappears quickly
18 Auto Ground 4.87 volts ???
No VA AND NO VS Or M5V or 17V
All Filter Capacitors reach 380volts Dc before discharging.
Question :How come the relays are closing and yet no voltage high or low on RL –ON?
Why does Voltage exist on the Auto Ground pin? Does that mean IC 701 is not doing it's job (submicom on bottom of power board)
Is 380 volts too high for the filter capacitors?
How can I isolate the source of the problem? No obvious shorts and all capacitors tested ok as do both relays.
Attached Files
Comment