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juan thomas
6 Posts |
 Posted - 12 July 2010 : 13:41:01
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| Have a QSF 430L that won't fully power up. When I turn on power switch get a bunch of squares on LCD display. Circulation pumps will work if I hold in breaker. All lights on main board light up except for bottom two. No lights on relay board. Have had problems lately of machine all of a sudden shuts off and then back on randomly. Today....nothing. |
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Nigeria
64 Posts |
Posted - 13 July 2010 : 06:58:43
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| juan check the power card and confirm that all the fuse on the board they are intact,if any of it is blown out it may cause the problem. |
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juan thomas
6 Posts |
Posted - 13 July 2010 : 11:29:10
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| Hi, thanks, checked all the fuses, all are ok. |
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kodak_service
Russia
93 Posts |
Posted - 13 July 2010 : 12:23:33
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| Check the power supply SR1 (+5V, 2A).It is in the right top corner. |
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juan thomas
6 Posts |
Posted - 13 July 2010 : 12:44:55
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| Not quite sure what you mean SR1, fuse, relay? Top right corner of the relay board? |
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kodak_service
Russia
93 Posts |
Posted - 13 July 2010 : 14:12:34
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| To the right of the CPU PCB. It's little PCB. |
Edited by - kodak_service on 13 July 2010 14:32:10 |
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juan thomas
6 Posts |
Posted - 23 July 2010 : 16:08:28
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| SRI checks out just fine, have put new main pcb and relay board, still no luck. |
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Noritsu Help
United Kingdom
1409 Posts |
Posted - 25 July 2010 : 11:35:21
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If you have changed both the CPU and relay boards, there must be a problem with voltages going to the boards.
On the CPU board check there is 5V DC between TP1 & TP2, 24V DC between TP4 & TP7, 5V DC between TP5 & TP7.
On plug J/P3 pins 5 & 6 should be 8V AC.
Other possibilities are something is shorting out somewhere, try unplugging connector J/P15 that goes to the loading box.
Try unplugging the display/ keyboard connection and see if the machine starts heating up the chemistry.
Are you sure the boards you have replaced are good working ones?
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juan thomas
6 Posts |
Posted - 26 July 2010 : 11:17:34
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| Turns out it was the SR1...did a check on TP1 and TP2 only had 2.5v....thanks everyone for the help!!!. |
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Noritsu QSF 430L problem
