A.Saleh Posted August 21 Report Share Posted August 21 Hello i am new here and just acquired an SP500 that previous owner said it used to be working fine however , when i power it up , green LED at the front goes on and red LED on right stay on i hear that fans briefly spins then stop it connects to USB and detected successfully , however i receive the error PLD Communication with CCD error is it a faulty scanner? LED behavior are normal? fans? feels like it trying to start then stop however Scanner detected please advise thanks Quote Link to comment Share on other sites More sharing options...
Minilab service Posted August 21 Report Share Posted August 21 SP500 has two power switches. Need turn on both of them. Do you have all voltages from power supply? Can you control scanner from output check menu? Quote Link to comment Share on other sites More sharing options...
A.Saleh Posted August 22 Author Report Share Posted August 22 Hi Yes I have both switches in the On position (front and back) I measured voltage on this 2 blocks (not sure if those are the only one you refer to) attached photo and only got 5V DC Fans seems try to start then immediately stops Output check menu throw error as attached Quote Link to comment Share on other sites More sharing options...
Minilab service Posted August 22 Report Share Posted August 22 If you measured correctly then your power supply doesn't work. On main board two connectors - CTL3 ( 24V ) and CTL7 ( 5V and 12V ) . Also should be power suppliers on other boards ( +12V, +20V, -12V, +5V, -5V, +24V on connectors PZR1, CCD2, DLE1, ADC2 ) . I was talking about output check menu on scanner system software. There can run everything ( motors, etc ) . Do not see scanner system software symbol on your screenshot. You selected "output devices" on MS01 menu. You have not any output devices ( printers ) , so this menu will not work. Quote Link to comment Share on other sites More sharing options...
A.Saleh Posted August 22 Author Report Share Posted August 22 Hi i took the whole power supply outside and disconnected all cables to check if there is something from control inside boards affects it. but turns out that the power supply itself not working properly turns on then off instantly , sounds like short circuit protection somewhere on the Power supply boards . power supply fan turns for instant then stops as well its the power supply for sure , don't have any idea if it can be fixed or not probably i'll return to the seller , maybe this is why he sold it pretty cheap best regards Quote Link to comment Share on other sites More sharing options...
Minilab service Posted August 22 Report Share Posted August 22 To test power supply can disconnect connectors, but have to leave connected connector PS9 ( two pin power switch connector PSW1 ) . Should be all power supply voltages. I repaired these power suppliers and after that they worked. Power supply quite complicated, so need to have experience to repair them. Quote Link to comment Share on other sites More sharing options...
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