PDP-4271HD
177
5
6
7
8
5
6
7
8
C
D
F
A
B
E
10.6 PROCESSING IN ABNORMALITY
Power supply and DC-DC converter
SW_REG
DC/DC Converter
MODULE_Ucom
IIC Communication
Device
3-wire serial Communication NG
IIC Communication NG
PSW1 (L_act)
PON (Command)
FAN_CONT
FAN_NG1 (H act)
ASIC
V+3.3V_UCOM
TEMP2
FAN_VCC
Drive
Circuit
Pull_up
SENSOR
MAIN_UCOM
POWER SUPPLY Unit
TANSHI Assy
MAIN Assy
DIGITAL Assy
Circuit diagram
Fan and temperature sensor
Circuit diagram
Specifications for port monitoring
MAIN Assy
MAIN_UCOM
FAN
Port Name
SD/PD Indication Assigned Pin
Active
FAN_NG 1
FAN
155
Shutdown with H
TEMP2
Abnormally high
temperature in the
MR
76
Shutdown when the
value exceeds the
predetermined value
TRAP_SW
TRAP_SW
V_3.3V_UCOM
MAIN_UCOM
PULL_D
MTB MAIN Assy
TRAP_SW
Circuit diagram