NEC LCD1550X-BK, Service Manual

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P_INVT
Limit
a
b
c
Minimum
20msec
(400msec)
b or more
Typical.
100msec
600msec
1300msec
Maximum
(200msec)
c or less
DUTYCINV
PRO_DLY
Each terminal turns to LOW simultaneously when the power is turned OFF.
c a
b
PIN No.
1
2
3
4
5
6
7
Name
12V
12V
GND
GND
P_INVT
PRO_DLY
DUTYCINV
Function
Power input
Power input
GND
GND
Inverter power control input
Power ON (HIGH), OFF (LOW)
Protection circuit control input
Protection circuit valid (HIGH), invalid (LOW)
Dimming PWM signal input
Resonance circuit active (HIGH), inactive (LOW)
Sequence at inverter ON
PIN No.
1
2
3
4
5
Name
HOT_1 (HOT_3)
HOT_2 (HOT_4)
-
COLD_1 (COLD_3)
COLD_2 (COLD_4)
Function
High pressure output 1 (3)
High pressure output 2 (4)
No connection
Ramp return 1 (3)
Ramp return 2 (4)
(1) J703
(2) J701 (J702)
1.8.3. Input/output terminal functions