Section 7 - Display Interface Board - Johnson Controls YORK OPTIVIEW YK Series Service Instructions Manual

FORM 160.54-M1

SECTION 7 - DISPLAY INTERFACE BOARD

The Display Interface Board is located on the Liquid
Crystal Display and is part of the microboard interface
to the Display. It permits the use of displays by differ-
ent manufacturers, by providing the microboard with
a means of automatically determining which Display
is present.
Since different display manufacturers require differ-
ent timing and control signals, the microboard Dis-
play Controller must be configured to meet the re-
quirements of the actual display installed. When AC
power is applied to the OptiView™ Control Center, the
microboard reads the panel identification (PID0 thru
PID3) voltage levels on the display interface board
during the power-up sequence to determine which
display is present. These voltage levels indicate the
actual display installed and the Display Controller is
automatically configured appropriately. To provide the
appropriate Panel ID voltage levels for the different
displays, there are different Display Interface Boards.
These boards have permanent wire jumpers that pro-
vide the voltage levels to the microboard for Panel ID
signals (PID0 thru PID3). These jumpers connect these
signals to either ground or open-circuit. When connect-
ed to ground, the voltage level for that signal is 0VDC.
When open, the voltage level is the VCC logic level,
which is either 3.3VDC or 5.0VDC, depending on the
display (refer to Microboard Program Jumper JP2).
The following are the different Display Interface
Boards and the Panel ID signals they provide to the
microboard.
• Display Interface Board 031-01765-001
Display Applicability:
LG Semicon LP104V2-W (031-02046-000)
PID0 – IN (GND)
PID1 – OUT (VCC)
PID2 – OUT (VCC)
PID3 – OUT (VCC)
JOHNSON CONTROLS
• Display Interface Board 031-01765-002
Display Applicability:
SHARP LQ10D367/368 (031-01774-000)
PID0 – OUT (VCC)
PID1 – IN (GND)
PID2 – OUT (VCC)
PID3 – OUT (VCC)
• Display Interface Board 031-02887-000
Display Applicability:
SHARP LQ104V1DG61 (031-02886-000)
PID0 – OUT (VCC)
PID1 – IN (pin 45 is tied to 44) (GND)
PID2 – No Connection Open (VCC)
PID3 – No Connection Open (VCC)
The Displays can operate in either Normal or Reverse
Mode for the Right/Left (R/L) and Up/Down (U/D)
scan. Normal for the R/L scan is left to right. Normal
for the U/D scan is top to bottom. As used in the Op-
tiView™ Control Center, it is configured to operate
in Normal Mode for both of these scans. The Reverse
Mode for R/L is right to left. Reverse Mode for U/D
is bottom to top. The Display Interface Board pro-
vides the appropriate signals to the display to put it in
Normal Scan Mode. By hard wired jumper or wiring
configuration, the signal is either tied to ground, VCC
(+3.3VDC or +5VDC, as determined by Microboard
Program Jumper JP2) or left open as follows:
• Display Interface Board 031-01765-001
Display Applicability:
LG Semicon LP104V2-W (031-02046-000)
P30 – OUT (Open)
P31 – OUT (Open)
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