HP Z400

CPU fan Pin Signal
1GND
2 +12V
3TACH1
4PWM
5TACH2
FDD Pin Signal Pin Signal
1Ground 18FLP_DIR#
2FLP_LOWDEN# 19Ground
3Tach 20FLP_STEP#
4FLP_WDO 21Ground
5MT 22FLP_STEP#
6Unused 23Ground
7Ground 24FLP_WRTEN#
8FLP_INDEX# 25Ground
9Ground 26FLP_TRACK#
10 FLP_MOTOR# 27 Ground
11 Ground 28 FLP_WP#
12 Unused 29 Ground
13 Ground 30 FLP_RD_D#
14 FLP_SEL_A# 31 Ground
15 Ground 32 FLP_HD_SEL#
16 Unused 33 Ground
17 Ground 34 FLP_DSKCHG#
ENWW 229