Led Circuit; 50-Pin Model - IBM DDRS-39130 - Ultrastar 9.1 GB Hard Drive Specifications

6.3 LED Circuit

Jumper pin #1 and #2 are used to drive an external LED.
Instead of the the jumper pins, the following pins can be used to drive LED.
68-Pin Model : Auxiliary Connector Pin #8 and #11.
80-Pin Model : SCA-2 Connector Pin #77 as shown in 6.3.3, "80-Pin Model" on page 38.
The schematics of LED circuit on each model are as follows.

6.3.1 50-Pin Model

D D R S 3 9 1 3 0 / D D R S 3 4 5 6 0 5 0 P i n M o d e l
Figure 28. L E D Circuit of 50-Pin Model
36
O E M Spec. of DDRS-3xxxx
+ 5 V
o
>
< 6 2 0 O h m
>
o J u m p e r P i n # 1 f o r L E D A n o d e
o J u m p e r P i n # 2 f o r L E D C a t h o d
/
\
/ / /