C141-E185
4-17
b.Fault LED: Output signal (CN1-A2 pin)
The IDD indicates that the write-protect status is in effect (CN1-A12 is connected to the GND, or the
CN2-9 and CN2-10 are short-circuited.) A signal for driving the LED is output.
74LS06 or equivalent
150
Ω
CN1-A2
(IDD)
IMPORTANT
This signal is temporarily driven at the GND level when the micro
program reads the SCSI ID immediately after the power supply to
the IDD has been switched on (it is possible to set up the SCSI ID by
short circuiting CN1-A1 and CN1-A2.)
c.CN1-A6 (reserved)
This pin is temporarily driven at the GND level when the micro program reads the SCSI ID
immediately after the power supply to the IDD has been switched on (it is possible to set up the SCSI
ID by short circuiting CN1-A3 and CN1-A4, and CN1-A5 and CN1-A6.)
This pin gets high impedance status except above.
d.–LED and LED (+5V): Output signals (CN1-A8 pin and CN2-21, 22 pin)
These signals drive the external LED as same as LED on the front of the disk drive. The
electrical requirements are given in Figure 4.21.
IMPORTANT
1.
The external LED is identical in indication to the LED on the front of the
IDD.
2.
Any load other than the external LED (see Subsection 4.3.5) should not
be connected to the CN2-21, 22 pin (LED [V] and –LED terminals).
3.
This signal is temporarily driven at the GND level when the micro
program reads the SCSI ID immediately after the power supply to the
IDD has been switched on (it is possible to set up the SCSI ID by short
circuiting CN1-A7 and CN1-A8.)
Содержание MAS3184NC - Enterprise 18.4 GB Hard Drive
Страница 1: ...C141 E185 01EN MAS3735NC NP MAS3367NC NP MAS3184NC NP DISK DRIVES PRODUCT MAINTENANCE MANUAL ...
Страница 10: ...This page is intentionally left blank ...
Страница 34: ...This page is intentionally left blank ...
Страница 72: ...4 22 C141 E185 IMPORTANT Do not connect the external LED to both CN1 and CN2 Connect it to either of them ...
Страница 96: ...This page is intentionally left blank ...
Страница 122: ...This page is intentionally left blank ...
Страница 126: ...This page is intentionally left blank ...
Страница 128: ...This page is intentionally left blankw ...
Страница 129: ......
Страница 130: ......