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Chinese monitor...

Discussion in 'Electronic Repair' started by Inty, Jul 30, 2005.

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  1. Inty

    Inty Guest

    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)...
  2. James Sweet

    James Sweet Guest

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

    Inty Guest

    :( 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.


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

    Link to my "Computers for disabled Veterans" project website deleted
    after threats were telephoned to my church.

    Michael A. Terrell
    Central Florida
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