York MAXE OPTIVIEW YK Service Instructions Manual page 31

MICROBOARD PROGRAM JUMPERS
JP1 - Watchdog en able/disable. The po si tion of this
jump er, in con junc tion with Pro gram switch SW
1 po si tion 12 enables or dis ables the pro gram
Watch dog pro tec tion.
Never disable the watchdog pro tec tion.
Severe com pres sor or chiller dam age
could re sult. The abil i ty to dis able the
watch dog pro tec tion is pro vid ed for
fac to ry test ing only!!!
IN - Watchdog protection enabled.
OUT - Permits Program switch SW1 position 12 to
enable or disable the program
Watchdog protection as follows:
Position 12 ON - Watchdog pro tec tion en abled
OFF - Watchdog protection disabled
JP2 - Display power and logic levels. Determines the
power supply voltage applied to the display.
Pins 1-2: +5VDC SHARP LQ10D367 and
LQ10D421 displays.
Pins 2-3: +3.3VDC NEC NL6448ACCC33-24
and LG Semicon LP104V2-W displays.
JP3 - Display backlight enable signal level polarity.
Jumper must be positioned according to the
volt age lev el required to turn on the Display
Back light.
Pins 1-2: 0VDC SHARP LQ10D421 Display.
Pins 2-3: +12VDC or +5VDC as determined
by po si tion of JP4. SHARP LQ10D367, NEC
NL6448AC33-24 and LG Semicon LP104V2-W
dis plays.
JP4 - Display backlight enable signal logic levels.
De ter mines the logic levels of the Backlight
en able sig nal.
Pins 1-2: +12VDC/0VDC SHARP LQ10D421
dis play.
Pins 2-3: +5VDC/0VDC SHARP LQ10D367
YORK INTERNATIONAL
TABLE 1
MICROBOARD PROGRAM JUMP ERS
NEC NL6448AC33-24 and LG Semicon
LP104V2-W displays.
JP5 - Display backlight power. Determines the pow er
supply voltage applied to the Display Backlight
In vert er Board.
Pins 1-2: +12VDC. SHARP LQ10D367 and
LQ10D421, NEC NL6448AC33-24 and LG
Semicon LP104V2-W displays.
Pins 2-3: +5VDC. Not Used
JP6 - Display memory type. Jumper must be po-
si tioned according to type of RAM used for
dis play mem o ry devices (U25 & U27).
IN - EDO: (extended data out) type. Jumper
should be IN.
OUT - FPM: (fast page mode) type. Not Used
JP7, JP8 - Display brightness control technique. De ter -
mines whether the display brightness is con trolled
by a variable voltage or variable re sis tance.
IN: Variable voltage (0-5.0VDC). SHARP
LQ10D367, LQ10D421 and LG Semicon
LP104V2-W displays.
OUT:Variable resistance. NEC
NL6448AC33-24 dis play.
JP9 - JP20 - Not Used
JP21 - Factory mounted thermal-type flow sen-
sor – evaporator. Style F and later chillers
only (applies to Flash Memory Card version
C.MLM.01.07.xxx and later).
OUT: Not Used
.
Pins 1-2: Not Used.
Pins 2-3: Style F and later chillers with factory
mounted evaporator thermal-type fl ow sensor.
JP22 - Factory mounted thermal-type fl ow sensor – con-
denser. Style F and later chillers only (Applies to
Flash Memory Card version C.MLM.01.07.xxx
and later).
OUT: Not Used.
Pins 1-2: Not Used.
Pins 2-3: Style F and later chillers with factory
mounted condenser thermal-type fl ow sensor.
FORM 160.54-M1(503)
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