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Re: Emulator II will not boot from disk

2013-01-09 by thisoldsynth

Kevin, Re the 12V rail, I think I will change my statement to some EII s did not use the power supply 12v rail, but instead connected the disk drive +12V to

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Re: Emulator II will not boot from disk

2013-01-09 by kgslug2

That Zenith PSU is interesting, I haven t seen any other SMPS which allow you to adjust anything other than the main (i.e. 5V) output. Unfortunately it appears

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Re: Emulator II will not boot from disk

2013-01-08 by thisoldsynth

Note that I went with the Zenith ZPS 150a in Darren s EII as it has adjustable outputs. The +15v rail is in fact +13.2V on the EII, and this was the only way

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Re: EII to DPX translation software

2012-12-20 by stuntman444

Hello! I will revive this thread because I have exactly the same problem described here. The only difference is that I my newly purchased DPX has OS 2.2. About

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E-II with not Piggyback expansion

2012-12-16 by Gil

My E-II neither has a piggyback expansion nor it has connectors for it on the digital board (they were not soldered there initially). Also, two of the 4 lines

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Emulator II will not boot from disk

2012-12-11 by kgslug2

Having fixed the PSU and the short on the output board, I was rather hoping to have a working EII. Unfortunately this was a somewhat optimistic assumption! On

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Re: Short somewhere on output board

2012-12-04 by kgslug2

Found it! It looks like a previous repair killed my E II. IC71B has at some point been replaced and a pair of SIL strips soldered in as a socket - for some

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New file uploaded to emulatorII-list

2012-12-02 by emulatorII-list@yahoogroups.com

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the emulatorII-list group. File :

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Short somewhere on output board

2012-12-02 by kgslug2

OK, so I now have a working PSU, onto the next problem! There appears to be a dead short (0 Ohms) between -15v and analogue ground (the black and blue wires in

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Re: THR101 in the power supply

2012-12-01 by kgslug2

Thanks Gregory, I m not sure about C121. There are a few figures on the schematic that are rather difficult to read. The capacitors I gave part numbers for are

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Re: THR101 in the power supply

2012-12-01 by gregalt57

Congratulations on your working PSU and thank you very much for uploading the parts list. Correct me if I wrong, but I think that the C121 capacitor should be

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Re: THR101 in the power supply

2012-12-01 by kgslug2

I now have a working power supply - and some of the rectifier diodes were indeed past their best. I replaced Q103, all of the capacitors and power resistors

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Re: THR101 in the power supply

2012-11-26 by kgslug2

Thanks Darren, 1 Ohm was what I had thought, so confirmation is good. I m still not sure about the power rating, but I ll go with 1/2 W. I have uploaded a list

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New file uploaded to emulatorII-list

2012-11-26 by emulatorII-list@yahoogroups.com

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the emulatorII-list group. File :

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Re: THR101 in the power supply

2012-11-26 by kgslug2

Please ignore my question on THR101. I didn t think that the schematic gave any value for it but it does - it is a SG220 thermistor. I d still like to know

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THR101 in the power supply

2012-11-26 by kgslug2

This is my first post, so I guess I should say hello! I have recently brought an EII with a dead PSU. Q103 was shorted and R106 burnt and open-circuit. Both

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