2 replies to this topic

[aceng]

I have a CTS-8200 was found that temperature of one of output board (p/n:135313-1) is very hot, making that colour of heatsink change from
black to brown.
I checked all transitors and diodes , all o.k..
Would you please give me some advises for troubleshooting?
I'd like to spend more time on finding out which component are defective,
not just change the board.

Thank you!

[KGring]

Hello,
It is possible that there is an open trace or components under the heatsink. The best option is to replaced that channel output card. The new card part number is 137156-3.

[maple]

I have a CTS-8200 was found that temperature of one of output board (p/n:135313-1) is very hot, making that colour of heatsink change from
black to brown.
I checked all transitors and diodes , all o.k..
Would you please give me some advises for troubleshooting?
I'd like to spend more time on finding out which component are defective,
not just change the board.

Thank you!

Check Q104 for loose/cold solder on Output Module, also on the drivers Q6 ~ Q11, make sure diodes D114, D115 & fuses F1, F2 are OK. Adjust R134 pot. for bias voltage across R150(30ohms resistor) if required.

If I remember correctly the bias voltage should be around 300mV, or you can compare it with the other good channels.

Pls note that you may require an extention/riser card or harness to do this for easy sake.