Chinese monitor...

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- Inty
  
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posted
18 years ago

Sat, Jul 30, 2005 5:38 AM

Hi, I'm searching for a TECO TE551 monitor schematic... the board is marked "Chung Sheng" and the CRT is "Chunghwa"... on internet I found only similar schematics that didn't help in the reparation. When the monitor is connected to pc and to a plug the monitor goes in protection mode (tick, tick, tick) but reset the pc leaving it connected results in 2 seconds of HT present and filiment on... when HT goes away filiment rests on... the HOT is a 2SC5148 and it isn't shorted but read open... i' ve found some mosfets (IRF630) that read open... there is a B+ regulator circuit based on a KA3428 and a IRFS630 (on the secondary side)...

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- James Sweet
  
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posted
18 years ago

Sat, Jul 30, 2005 8:24 AM

marked

similar

connected

and

that

IRFS630

There's probably no schematic available. Sounds like something is shorted though, it shouldn't be too hard to fix it.

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- Inty
  
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posted
18 years ago

Mon, Aug 1, 2005 7:44 PM

"James Sweet" ha scritto nel messaggio news:rPGGe.1642$kc6.851@trnddc03...

:( i've found some cold-solder joints (all the solders on the monitor are defected, unbelievable !) and the open HOT... i will try to remake all the solder, change the hot and the mosfets and try the monitor.

I.

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- Michael A. Terrell
  
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posted
18 years ago

Mon, Aug 1, 2005 10:59 PM

Bad solder joints? Just wait till the lead free stuff starts showing up on your bench.

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Michael A. Terrell
Central Florida