York 00497VIP Microboard Program Jumpers, Watchdog protection as follows, JP10 - JP26 - Not used

Service

TABLE 2 – MICROBOARD PROGRAM JUMPERS

MICROBOARD PROGRAM JUMPERS

JP1 - Watchdog enable/disable. The position of this jumper, in conjunction with Program switch SW 1 position 12 enables or disables the program Watchdog protection.

Never disable the watchdog protec- tion. Severe compressor or chiller damage could result. The ability to disable the watchdog protection is provided for factory testing 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 protection enabled 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

Pins 2-3:+3.3VDC LG Semicon LP104V2 displays.

If this jumper is not correctly installed the display could become damaged.

JP3 - Display backlight enable signal level polarity. Jumper must be positioned according to the voltage level required to turn on the Display Backlight.

Pins 1-2:0VDC (Not used)

Pins 2-3:+12VDC or +5VDC as determined by position of JP4. SHARP LQ10D367 and LG Semicon LP104V2 displays.

JP4 - Display backlight enable signal logic levels. Determines the logic levels of the Backlight enable signal.

Pins 1-2:+12VDC/0VD (Not used)

Pins 2-3:+5VDC/0VDC LG Semicon LP104V2 displays.

JP5 - Display backlight power. Determines the power supply voltage applied to the Display Backlight Inverter Board.

Pins 1-2:+12VDC. SHARP LQ10D367 and LG Semicon LP104V2 displays.

Pins 2-3:+5VDC. (Not used)

JP6 - Display memory type. Jumper must be posi- tioned according to type of RAM used for display memory devices (U25 & U27).

IN - EDO: (extended data out) type. Jumper should be IN.

OUT - FPM: (fast page mode) type. Not used at this time.

JP7, JP8 - Display brightness control technique. Determines whether the display brightness is controlled by a variable voltage or variable resistance.

IN: Variable voltage (0-5.0VDC). SHARP LQ10D367 and LG Semicon LP104V2 displays.

OUT: Variable resistance. (Not used)

JP9 - COM 2 serial communications port. Configures COM 4 port to be either RS-485 or RS-232.

Pins 1-2: RS-232

Pins 2-3: RS-485

JP10 - JP26 - Not used.

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