Full m/lab SD2000 schematics

[WM6]

Except if 15k should be trim-pot.

[detecto]

I think i find one error in schematic and i am actually 100% sure its error as it have no sense.
This 330R resistor have nothing to do in this voltage divider configuration.
Voltage is set to the 0.6 x input voltage and this 330R resistor simply not feet there.
Can anyone who own SD2000 check?

[ZED]

To replace the LM394,use a SSM2212,its in a smd package though, not thru hole.

[liekwang]

Sir anyone knows for a replacement for LM394

[6666]

I really appreciate the help but im still confused. I understand the Schmitt trigger and the components but on this schematic which is which, AND / NOR ?

[ATTACH]53982[/ATTACH]

Thanks!

Do you mean the logic symbol ?, they are shown at bottom of schematic

[GOHO]

I really appreciate the help but im still confused. I understand the Schmitt trigger and the components but on this schematic which is which, AND / NOR ?



Thanks!

[6666]

which is which? 40106 = AND 4093= NOR?

Thanks

The CD40106B device consists of six Schmitt-Trigger inputs. Each circuit functions as an inverter with Schmitt-Trigger input.

The CD4093B consists of four Schmitt-trigger circuits. Each circuit functions as a two-input NAND gate, with Schmitt-trigger action on both inputs.

[GOHO]

which is which? 40106 = AND 4093= NOR?

Thanks

[kt315]

40106 and 4093? just add CD. CD40106. CD4093.
also HEF, also MM, HCF, etc.

MC140106. google more.

[GOHO]

Thanks!

What about the AND / NOR? Any part numbers? Are they individual AND/NOR ICs? On the SD2200 PULSE CCT...

Thanks Again ?

[kt315]

connections of power pins of the CMOSs' to power lines.

[GOHO]

Hi, Can someone tell me what these componets are?



Thank you!

Greg

[ZED]

Hello Andrei

Nice job on the tran.png file,makes comparisons much easier,the TP0610K is the same fet as the SI1021R,compare the two datasheets,the TP0610K is in a sot23 package,much easier package to work with than the SI1021R.

Also the IRFB4020 fet is the same fet i use for a TX fet.

[Andrei]

I also found one TP0610K transistor, it seems to be not much better than zvp4105, but it is affordable and costs a penny

[Andrei]

Hello ZED!
From power transistors like good irf640, IRFB4020