3 - Clock PCB assembly


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Post Thu Oct 15, 2015 4:24 pm

3 - Clock PCB assembly

Please read through these BEFORE starting on construction. Any differences in assembly for the 'Batch3' black PCBs used from November 2017 are marked with '***' in bold.

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Post Mon Oct 19, 2015 3:07 am

Re: Clock PCB assembly

Fit the 11x 1N4148 diodes in locations marked for D1,2,3,4,5,6,7,8,9,10 and 11 as shown: **NOTE** the band marked on the end of the diode body must face the same way as shown in the photograph, this is also indicated on the PCB with a thick white band.

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Image

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Post Mon Oct 19, 2015 3:10 am

Re: Clock PCB assembly

Fit the 5x 100r resistors (brown-black-brown) in locations marked for R1,2,6,7 and 10 as shown:

Image

Image

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Post Mon Oct 19, 2015 3:13 am

Re: Clock PCB assembly

Fit the 2x 1K2 resistors (brown-red-red) in locations marked for R4 and R11 as shown (ignore R12, it isn't used now):

***BATCH3 Blue label kits will use 1k (brown-black-red) in their place***

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Image

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Post Mon Oct 19, 2015 3:14 am

Re: Clock PCB assembly

Fit the 1k8 resistor (brown-grey-red) or 2k2 (red red red) in the location marked for R3 as shown:

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Image

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Post Mon Oct 19, 2015 3:15 am

Re: Clock PCB assembly

Fit the 5K6 resistor (green-blue-red) in the location marked for R5 as shown:

Image

Image

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Post Mon Oct 19, 2015 3:17 am

Re: Clock PCB assembly

Fit the 2M2 resistor (red-red-green) in the location marked for R9 as shown, this one is a bit tight:

Image

Image

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Post Mon Oct 19, 2015 3:19 am

Re: Clock PCB assembly

Fit the 560k resistor (green-blue-yellow)

***For Batch2 onwards boards it's a different value, 240k (Red yellow yellow) and smaller

in the location for R13 just above T11 as shown:

Image

Image

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Post Mon Oct 19, 2015 3:41 am

Re: Clock PCB assembly

Fit the yellow plastic .22u capacitors x5 in locations marked for C12,13,14,15 and 16 as shown:
Image

Image

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Post Mon Oct 19, 2015 3:42 am

Re: Clock PCB assembly

Fit the brown 10n (marked 103) or 33n (marked 333) ceramic capacitors x3 in locations marked for C1,4 and 11 as shown:

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Ignore C6 as it is no longer required on the later PCBs.
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