HP 400 Series Servicing Manual page 292

Model 400s (continued)
LED board, 3-16
LED indicators, location, 2-4
main power distribution cable connectors,
4-73 to 4-74
mass storage devices (removable media), 2-4
mass Storage/Motherboard, part numbers,
5-84
memory board configurations, 3-15
monitor controllers, 1-14
overview, 1-9 to 1-17
physical configuration, 1-11 to 1-14
power supply, 3-19, 4-70 to 4-72
Power switch, 2-4
removal and replacement procedures
3-slot DIO-II card cage, 5-64
card cage fan, 5-48
converter board, 5-51
CPU board, 5-52
DIO-II
accessory boards, 5-25
center wall, 5-66
motherboard, 5-68
emulator board, 5-58
HP 330/660 MB disk controller board,
5-38
HP-IB interface board, 5-50
internal SCSI cable, 5-38
ISA
accessory boards, 5-43
backplane, 5-44
card cage, 5-46
center wall, 5-60
LED board, 5-72
LED ribbon cable, 5-74
left side cover, 5-29
main fans, 5-70
mass storage device, 5-36
mass storage power distribution cable,
5-40
memory board, 5-56
power distribution cable, main, 5-76
power supply, 5-26
power switch, main, 5-75
real-time clock battery, 5-59
RFI cover, 5-42
right side cover, 5-28
SCSI cable, 5-38
standard/ISA motherboard, 5-62
top cover, 5-27
trim plates, 5-30
Reset switch, 2-5
Service LED, 2-5
8 Index
SERVICE Mode switch, 2-5
standard system, block diagram, 3-6
system unit
3 versions available, 1-11 to 1-12
configurations, 1-15 to 1-16
connectors, 2-5
controls, 2-4 to 2-10
removing and replacing assemblies, 5-24
to 5-37
system-level operation
DIO-II, block diagram, 3-7
ISA, block diagram, 3-8
standard, block diagram, 3-6
three main configurations, 1-9
troubleshooting
checkout procedures, 4-70 to 4-77
Winchester disk drive specifications, 1-17
Model 400t
block diagram, system, 3-4
calendar battery checkout procedure (Do-
main), 4-69
connectors, internal power, 4-62
cover removal, 4-61
CPU/Motherboard, 3-15
DIO-II bus slot, 3-2
hardware checkout procedures, 4-60 to 4-69
HP-IB interface slot, 3-2
ISA subset bus slot, 3-2
keyboards available, 1-6
LED board, 3-16
memory board configurations, 3-15
monitors available, 1-6
overview, 1-2 to 1-8
physical configuration, 1-5 to 1-6
power connections, internal, 4-62
power supply, 3-19, 4-63 to 4-67
Power switch, 2-1
power-on LED circuit FRU pin numbers,
4-67
removal and replacement procedures
calendar battery, 5-21
CPU board, 5-12
CPU board internal cables, 5-13
EEPROM, 5-17
Emulator board, 5-11
graphics controller board, 5-7
LED board, 5-20
memory module, 5-6
network interface board, 5-8, 5-9
power supply, 5-18
power switch panel, 5-19
Winchester disk, 5-10