EZoFlash форум

My ezoflash 4v4 this with problems in OE.

OE-24 active in test/HW = 0.90 volts

0E-24 desactive in test/HW = 0

d0..d7 > 0,50 volts with OE desactive in test/HW

Check OE voltage changes on programmer elements IC7/10,IC7/11, IC5/13, IC5/14

mode ECP+EPP
With programmer not connected in the LPT1

IC7/10 - 0,01 Volts
IC7/11 - 4,96 Volts
IC5/13 - 4,96 Volts
IC5/14 - 4,96 Volts

With programmer connected in the LPT1

IC7/10 - 0,01 Volts
IC7/11 - 4,96 Volts
IC5/13 - 4,96 Volts
IC5/14 - 3,38 Volts

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changed parallel port for mode NORMAL - below

With programmer not connected in the LPT1

IC7/10 - 0,01 Volts
IC7/11 - 4,96 Volts
IC5/13 - 4,96 Volts
IC5/14 - 4,96 Volts

With programmer connected in the LPT1

IC7/10 - 0,01 Volts
IC7/11 - 4,96 Volts
IC5/13 - 4,96 Volts
IC5/14 - 4,85 Volts
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Check voltage changes. Test H/W . Mark/unmark OE-24 box

OE-24 unmark

IC7/10 - 0,01 Volts
IC7/11 - 4,96 Volts
IC5/13 - 4,96Volts
IC5/14 - 4,86 Volts

OE-24 Mark

IC7/10 - 0,90 Volts
IC7/11 - 0,01Volts
IC5/13 - 0,01 Volts
IC5/14 - 0,14 Volts

Fail logic element output IC7- 10
Usually short between lines. Inspect carefully lines from IC7/10 to IC4/15, from IC7/10 to BUS BU3/12.

inspected the points described, there is no short, is that one of them is burned (IC7 and / or IC4)?

sorry for the english, translated