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hp 66311b

Question asked by ericmax on Jul 13, 2011
Latest reply on Jul 18, 2011 by carlp

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Hi All,
I have original hp 66311b, which need repair. I am looking for the repair manual and schematic. Does anyone knows how to get one. I did downloaded service manual from Agilent's website, but main board doesn't match with one shown in the manual.
Power supply passes all the self tests. A few seconds after turns on display shows "port" and fan goes into high gear. Programming of the output voltage has no effect on the output voltage with display showing "0.008V" no matter what is the programmed value.

Thanks'

Mickey

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carlp Jul 14, 2011 1:18 PM
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Hello Mickey, I may be able to help you I need some aditional information.
1. What is the serial number of your unit?
2. Does the unit say Agilent on the front panel?
3. When the unit goes into "protect" what is the protect, could be unreg, OT, ect?
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ericmax Jul 14, 2011 5:29 PM
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"
Hello Mickey, I may be able to help you I need some aditional information.
1. What is the serial number of your unit?
2. Does the unit say Agilent on the front panel?
3. When the unit goes into "protect" what is the protect, could be unreg, OT, ect?
"

Hi here are the information you requested.

1) It looks like serial number has worn off on the back. Is there an other place I can find the serial number?
2) The unit say "HP" not Agilent.
3) Before the "protect" message and fan going into high gear display show "overload" condition briefly.
The control board is hp "5064-0088" serial number "8U101LD". the main board is hp "66311-60021" serial number "2asyi"(yellow sticker close to AC connector). Both boards are surface mounted.

Thanks'
Mickey
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carlp Jul 18, 2011 9:48 AM
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http://cp.literature.agilent.com/litweb/pdf/5964-8176.pdf

Hello Mickey,
The above link is the service manual. It has some trouble shooting information. The manual may help you repair the unit.
Unfortunatly there is no over all schematic included mainally because this product has SMT assemblies. That ment that the entire assembly would be replaced.
The tested assembly 66311-61021 is no longer avaliable. This unit was changed back in 1999.
RECOMMENDATION:
Try to trouble shoot the unit using the service manual above.
The product is now on exchange it may be more cost affective for you the do the exchange
Many of the SMT parts are not available at the time of introduction of the SMT version 1999.

Let me know if you need any additional help!
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