Service manual

SERVICE MANUAL (BSV-4251 BSV-4251A )
MODEL NAME DOCUMENT NO REVISION NO REVISION DATE PAGE
VSC BOARD PIN CONFIGURATION
Pin No I/O Specification Description
1 ( 5V ) I 5V VSC 5V Input
2 ( 5V ) I 5V VSC 5V Input
3 ( 5V ) I 5V VSC 5V Input
4 ( GND ) GND 5V Ground
5 ( GND ) GND 5V Ground
6 ( GND ) GND 5V Ground
7 ( 12V ) I 12V VSC 12V Input
8 ( 12V ) I 12V VSC 12V Input
9 ( GND ) GND 12V Ground
10 ( GND ) GND 12V Ground
11 ( 12V ) I 12V FAN 12V
J7
12 ( GND ) GND FAN 12V Ground
1 ( AC-DET ) I 5V / 0V
AC POWER DETECT PORT
: AC INPUT DETECTING.
: AC POWER ON  High ,
AC POWER OFF  LOW
:Turn off the power by power sequence to
stabilize PDP MODULE in case of power
breakdown.
3 ( 5V STBY ) I 5V 5V INPUT PORT FOR VSC STANDBY
2 ( RL-ON ) O 5V / 0V
RELAY CONTROL PORT FOR POWER ON
: Relay On  High , Relay off  Low
6 ( 5V-MNT ) I 5V / 0V
PDP MODULE STABLE CHECK PORT.
: The port to provide control signal to PDP
MODULE after the controller stabilized. At the
moment, MICOM always check this signal and
turn off the power when the signal is low.
4 ( GND )
5 (VAVS-ON ) O 5V / 0V
PORT FOR VA/VS OF PDP MODULE.
: ON  HIGH , OFF LOW
:To protect PDP MODULE, Micom turn on the
Va/Vs 2 seconds after checking 5V-MNT.
J6
7 ( NC ) No Connection
1 ( REMOCON ) I 5V Monitor transmitter signal input port
2 ( GND )
3 ( 5VST ) O 5V Stand by 5V Output Port
4 ( GND )
5 (LED-R ) O 5V / 0V
RED LED CONTORL OUTPUT PORT
: High : Red LED On
P2
6 (LED-G ) O 5V / 0V
GREEN LED CONTORL OUTPUT PORT
: High : Green LED On
BSV-4251/4251A RD(1) 00 03/10/23 18/75