Lvps Assy Mcu Pcb - Star Micronics LS-5 SERIES Technical Manual

MAINTENANCE GUIDE
↔
5-2-1. LVPS Assy
LVPS ASSY
PL 6.1
RELAY
FG
INTER-
LOCK
SWITCH
P/J2
–
1
–
2
Signal line name
5VDC-LD
VS
TEMP.
*1: Short prevention of power voltage output from LVPS assy
5VDC-LD
5VDC
24VDC
*2: Stopping output by no-load condition of LVPS assy
When power is turned ON while making LVPS assy no-load by removing the connector (P/J11) on MCU PCB,
output decreases after a little while (about 1 minute), and entire output stops.
Turn power OFF, connect the connector (P/J11) to provide load, and, about 5 minutes later, turn power ON again,
and output restores.
MCU PCB
HEATER ROD ON(L) 4.2VDC
SG
VS
SG
5VDC-LD
5VDC
SG
RTN
RTN
24VDC
24VDC
24VDC
TEMP.
SG
P101
⊃
–
⊃
–
LD power voltage of LD assy of ROS assy
Voltage drop signal: Outputs 5V DC when power is OFF.
Data of temp. sensor assy's thermistor
Output status
5VDC-LD 5VDC
A
B B
A A
P/J11
⊃
1
⊃
2
⊃
3
⊃
4
⊃
5
⊃
6
⊃
7
⊃
8
⊃
9
⊃
10
⊃
11
⊃
12
⊃
13
⊃
14
4
1
Reference
: Output continues during shorting.
: Output stops during shorting.
24VDC
A: Automatic restore after release of
B: Output restores by turning power OFF
B
A
– 66 –
MCU PCB
PL 6.4
–
–
–
–
P15
–
– 8
–
–
–
–
–
–
P18
–
– 3
–
–
shorting
after release of shorting and by turn-
ing power ON again 2 or 3 minutes
later.