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What is the function of Q3005 in the TM506A?


 

Hi to All,


With several TM506A's it seems handy to me to convert the SG5010 for operating in one of these. The SG5010 has a provision to replace the GPIB/PLL Board a little more inside the enclosure.



But when powering it on through a TM506A it doesn't restart. Powering ¨ªt down was the only option. The Module was completely non-responsive with all Lights and Full Display on.



It seems that TM506A's have a partly connected transistor (Q3005). In TM5003 and TM5006(A)'s this transistor provides the restart voltage. Normal TM500 Power Supplies don't have this transistor. I always thought the SG5010 has a special Voltage Divider as a replacement for the restart voltage in case of working in a TM500 Power Supply. But this Divider didn't work as intended in a TM506A. Anybody who knows the ins and out of this Q3005?




Greetings,


Egge Siert


NOOT: the SG5010 does work in a 620-0057-00 (OCP5502 Power Supply), which is a Modified TM503B Power Supply (Lowered Voltages and GPIB Connections).

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