Tripp Lite SU60KX manual LCD Panel Control Circuit, To LCD

2 Theory of Operation (continued)

2.11 LCD Panel Control Circuit

Located at NH-SYS-M board (System MCU and Control Circuit)

		TO LCD						Stand-Alone
		CNM5					LED0	NORMALLED
	VLED	1	2	VLED
							LED1	BYPASS LED
	LED0	3	4	LED1
	LED2	5	6	LED3			LED2	FAULT LED
	LED4	7	8	LED5
	OFF	9	10	ENT			LED3	BATTERYLED
	ESC	11	12	UP
	DOWN	13	14	BKLIT			LED4	NC
	NO+	15	16	G1
	CONTRAST	17	18	LcdDATA			LED5	NC
LcdD0	LcdWR	19	20	LcdCS	LcdD1	(33)
		21	22
(32) LcdD2					LcdD3
(34) LcdD4		23	24		LcdD5	(35)
(36)		25	26		LcdD7	(37)		RM116
(38) LcdD6	G1	27	28	G1		(39)	U-LcdDATA
		29	30			(50)		LcdDATA
							CM67
								ZDM1
	CM72CM73CM74CM75	G1		CM76CM77CM78CM79

RM126	KEY_ESC		KEY_ESC
ESC
	CM85		(8)
		RM127
	G1
RM133	KEY DOWN		KEY DOWN
DOWN
			(9)

				G1	RM121
	8	UM5	9	(49) U-LcdCS	LcdCS
G1		GND COM		CM80	ZDM2

(73)	U-LED0	7	7B	7C	10	LED0
	U-LED1	6			11
(74)	U-LED2	5	6B	6C	12	LED1			G1
(75)	U-LED3	4	5B	5C	13	LED2		U-LcdWR		RM132
(76)	U-LED4	3	4B	4C	14	LED3	(63)
(77)	U-LED5	2	3B	3C	15	LED4				LcdWR
(78)	CENTRAL OK	1	2B	2C	16	LED5		CM90
(70)			1B	1C		BYP OK				ZDM3

CM91 RM135

+12VS

RM134

BKLIT

G1

	G1
RM140	KEY OFF	KEY OFF
OFF
		(22)
	CM96	RM143
	G1
RM147	KEY UP	KEY UP
UP
		(10)

CM103 RM149

(62)

U-LcmBL RM137

RM139 QM9

RM144 G1

5VS

RM148

NO+

CM104

G1

RM138

+12VS	RM158
G1

CM121

CM118

EPO

(85)

HSM1

1

HS

UM10

1			VLED
	Vin	+5V	3

GND2	CM120
	CM119
	G1

G1

RM152	KEY_ENT	KEY_ENT
ENT
	CM110	RM154(7)			+12VS
					4
					2
	G1	(2)	U-LcmCA	RM155	3
					CM112
					11
					G1

G1

CM113

1

1CONTRAST

UM7A

LM324AD

G1

(a)MCU detects the status of EPO button (on LCD display panel) via “EPO” (85) (low active). When the EPO button is activated, UPS will shut down the output and turn off the inverter. When the EPO button is released, UPS will stay in bypass mode.

(b)MCU can control the LCD backlight via “U-lcmBL” (62).

(c)MCU can adjust the contrast of LCD by PWM control via “U-lcmCA” (2).

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