Preview Display Connectors - HP PageWriter XL M1705B Service Manual

WRITEGATE Enables data writing on the disk.
WRITEPRO- Indicates to the system that the disk is write
TECT protected.
Preview Display
These tables list the pin assignments for the connectors on the
Connectors
preview display circuit boards. J2 on the preview display logic board
connects to the cardiograph's system expansion connector, 512. Its
pin assignments are listed in Table A-3. The preview display is an
option available only on the M1700A cardiograph.
Table A-l 1.
Preview Display Logic Board, Jl, to
Preview Display Power Supply Board, 52
Signal
+5VF
FP
LDO-LD3
LP
POWERGND
SCP
UDO-UD3
VIN
VLCDEN
101UD3 1 20 1 GROUND 1
Definition
A filtered version of the system +5V.
Frame pulse. Clocks in one screen of LCD data.
Data bits for lower half of preview screen.
Latch pulse. Clocks in one line of LCD data.
Power ground return for VIN.
Shift clock pulse. Clocks in upper and lower LCD
data.
Data bits for upper half of preview screen.
15 to 31 V dc depending on line voltage and load.
LCD enable signal ~
Connector Pin Assignments A-l 1