Hi people,
Got my hands on a sweet 60 inch plasma. Guy i bought it from showed me live at his house: Turn on, relay clicks, faint glow until you turn it off.
So I went online, searched and found around the same model and people saying cracked solder etc, fused. So I wasn't smart and just took the boards apart as im a "electronics hobbyist". Indeed 1 or 2 cracked solder points. Fets measured OK from a quick check on my end, so did the fuses.
Resoldered the points, replaced one "starting to bulge" capacitor, and put the things back in. But now it does nothing anymore. As in: Turn on, relay clicks but no faint glow anymore. Just black screen.
Baseline:
Zsus
Incoming:
All in spec
Outgoing:
VZB: 0.9v
Ysus
Incoming:
All in spec
Outgoing:
VY: 0v
VSC: 0v
=============================================
When disconnecting Ysus board power ZSUS VZB 0V.
When disconnecting ZSUS board power Ysus both test points still 0v.
Led on logic board blinks Long-Long-Short-Pause-Short
Not quite sure how sensitive these boards are, but incoming 5v = 5.16v. Not sure if thats within spec.
=============================================
Disconnecting LVDS and jumping ext_auto_gen:
Zsus
Incoming:
All in spec
Outgoing:
VZB: 5-9V
Ysus
Incoming:
All in spec
Outgoing:
VY: 5V
VSC: 5V
Nothing on screen. Faint coilwhine from ZSUS board, double powercycle on ZSUS board (10 seconds in between, 2 seconds slight coil whine per cycle), Tv turns off after that.
I have literally no idea what's wrong, yes it was stupid to not test the voltages when it still had the dim glow, but instead i fixed the solder cracks first. Anybody know whats going on?
Greetings,
Merlijn
Got my hands on a sweet 60 inch plasma. Guy i bought it from showed me live at his house: Turn on, relay clicks, faint glow until you turn it off.
So I went online, searched and found around the same model and people saying cracked solder etc, fused. So I wasn't smart and just took the boards apart as im a "electronics hobbyist". Indeed 1 or 2 cracked solder points. Fets measured OK from a quick check on my end, so did the fuses.
Resoldered the points, replaced one "starting to bulge" capacitor, and put the things back in. But now it does nothing anymore. As in: Turn on, relay clicks but no faint glow anymore. Just black screen.
Baseline:
Zsus
Incoming:
All in spec
Outgoing:
VZB: 0.9v
Ysus
Incoming:
All in spec
Outgoing:
VY: 0v
VSC: 0v
=============================================
When disconnecting Ysus board power ZSUS VZB 0V.
When disconnecting ZSUS board power Ysus both test points still 0v.
Led on logic board blinks Long-Long-Short-Pause-Short
Not quite sure how sensitive these boards are, but incoming 5v = 5.16v. Not sure if thats within spec.
=============================================
Disconnecting LVDS and jumping ext_auto_gen:
Zsus
Incoming:
All in spec
Outgoing:
VZB: 5-9V
Ysus
Incoming:
All in spec
Outgoing:
VY: 5V
VSC: 5V
Nothing on screen. Faint coilwhine from ZSUS board, double powercycle on ZSUS board (10 seconds in between, 2 seconds slight coil whine per cycle), Tv turns off after that.
I have literally no idea what's wrong, yes it was stupid to not test the voltages when it still had the dim glow, but instead i fixed the solder cracks first. Anybody know whats going on?
Greetings,
Merlijn
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