Vp-570 Power Board; Description; Features; Interface Signals - Hitachi CML156XW Service Manual

6. VP-570 POWER Board

6.1 Description

This specification defines the performance and characteristic for the VP-570 power board. It
supplies the following items :
1) A constant 5V output source for logic board.
2) A constant 5V output source for audio power source.
2) A constant 12V output source for inverter power source.

6.2 Features

Wide input range : AC input 90 ~ 264Vrms
High efficiency : η>75%
Inverter brightness adjustment by continual mode
Protection function : DC output is design by auto-recovery.

6.3 Interface Signals

6.3.1 Input
1. AC Inlet: RICHBAY R-301-90
2. J701 :SCJ-0345-I-X-S SC 3Pin
6.3.2 Output
J801: The wire set of Pin2.0 /7Pin to Pin1.25/7 Pin , 110mm length
PIN NO.
1
2
3
4
5
6
7
8
9
J901 & J902: Inverter High Voltage Output
PIN NO.
1
2
It includes OPP, SCP.
Function
+5V +5V supply for logic board
+5V +5V supply for logic board
GND Ground
GND Ground
VEN Enable signal for inverter (Low active , <1V)
VBRI Brightness signal for inverter (0V to 3.3V)
--
+5V +5V supply for audio's power
GND Audio ground
Function
LV
HV
Function
Comment
Low voltage (common)
High voltage for lamp
20