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Service mode for Dell Ultrascan P991

Discussion in 'Electronic Repair' started by Dark_Anomaly, Jan 21, 2004.

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  1. Dark_Anomaly

    Dark_Anomaly Guest

    All-this monitor has excessive brite, cannot locate any adjustments for G2 on mainboard or crt board. only adjust available is h-focus and v-focus on fbt. any idea on how to access more controls, possibly service mode thru front panel user controls, etc? any help will be appreciated. TIA-D_A
     
  2. David

    David Guest

    If it is like many Dell monitors made by Sony:
    1. It has a failure that needs repaired. No need to screw with adjustments.
    Most competant techs with experience doing monitor repairs will have no
    trouble narrowing down any failure like this, usually without a schematic or
    service manual
    2. If it has adjustments, they are available with a special DAS alignment
    software and interface that is difficult and relatively expensive to get a
    hold of it you are not an authorized servicer.

    Have you called Dell to see what it will cost to have it repaired yet?
    David

    on mainboard or crt board. only adjust available is h-focus and v-focus on
    fbt. any idea on how to access more controls, possibly service mode thru
    front panel user controls, etc? any help will be appreciated. TIA-D_A
     
  3. Wayne

    Wayne Guest

  4. Dark_Anomaly

    Dark_Anomaly Guest

    no, why would i be posting to this group, soliciting advice from competent
    techs, if i was planning on having dell repair it? i understand that no
    amount of adjustment is a substitute for fixing root cause... however i
    have seen more than 1 monitor that has been so far out of adjustment that
    it may appear to have failed... just asking for a little advice, all techs
    have to start somewhere, on their journey to someday be competent ;-)
     
  5. Jerry G.

    Jerry G. Guest

    From memory this monitor has no service mode to speak of. There are failed
    components causing your fault. Sometimes it is the high voltage multiplier,
    and or sometimes it is also some of the capacitors in the HV and scan
    circuits.

    As for any service set-ups you will require the DAS alignment system with
    the software and interface. There is also some factory training and proper
    instrumentation required to do this type of work. This is available to
    authorized service centres only. The cost of this system is far greater
    than even buying a number of new montors. The unauthorised centres job
    these types of monitors out to the factory service if this level of service
    is required, and bill the customer accordingly.

    --

    Greetings,

    Jerry Greenberg GLG Technologies GLG
    =========================================
    WebPage http://www.zoom-one.com
    Electronics http://www.zoom-one.com/electron.htm
    =========================================


    All-this monitor has excessive brite, cannot locate any adjustments for G2
    on mainboard or crt board. only adjust available is h-focus and v-focus on
    fbt. any idea on how to access more controls, possibly service mode thru
    front panel user controls, etc? any help will be appreciated. TIA-D_A
     
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