HP 64100A Service Manual page 10

Model 64100A - General
Info~ation
1-9. The-four areas of the Rear panel are Power Control, HP-IB system interface
bus, RS-232 serial interface, and system control source. The power functions
are on the lower right-hand side of the rear panel. The model 64100A requires
110/220 VAC +/-15%, 48-66 HZ. The position of the LINE SELECTOR determines
either 110 V (10 AT fuse) or 220 V (5 AT fuse) operation. The power ON/OFF
switch is a rocker type.
1-10. A card cable opening is provided to the outside of the mainframe through
the space between the rear of the top cover and rear panel. Three slots with
clamps are provided for access. Cable length for option boards is determined
at the factory and are shipped at maximum length.
1-11. There are 13 PC board slots (see figure 1-3). The first three slots have
printed circuit boards installed at the factory. These PC boards must
be
installed in the order given for the 64000 system to operate. The three
required boards are:
slot A - I/O PC Board
slot B - Display Control PC Board
slot C - CPU PC Board
1-12. For convenience, board identifier labels for the first three boards are
located just above the cardcage on the left-hand side. The remaining ten
option slots are numbered 0-9.
1-13. The PC boards interface to the system through the motherboard on the
bottom of the card cage. A cable from the Rear Panel PC board (on the rear
panel) makes connection to the top center connector on the I/O board.
1-14. There is a limit to the number and types of option boards that may
be
installed in the cardcage without exceeding the capability of the 400 watt
Power Supply. This limit is determined by the amount of available current from
the power supplies. Table 1-1 lists the power supply current drain for the
mainframe with only the three mandatory boards installed.
MF 1-2
Table 1-1. Basic Power Supply Current Drain
ITEM
Processor ,ROM
I/O
Disp Control,RAM
Keyboard
Display Driver
Rear Panel
Bus Pullups
Subtotal
Available Current
(NO OPTIONS INSTALLED)
+12V
0·595
0.164
0.640
1·500
2.899
4 Amps
+5V
1.429
0.708
1·533
0.100
0.714
0.070
4.793
45 Amps
-5V
0.0003
0.0064
0.239
0.2457
25 Amps
-12V
0.078
0.078
1 Amp
-3V
0.0003
0.0064
0.239
0.2457
30 Amps