Panasonic KX-FT21BX Service Manual page 183

1 2 3
A
B
PRINTING
23~24V
DATA
LATCH
5V
5V
C
0V
0V
CLOCK
5V
0V
D
STB1
STB2
E
THERMAL
HEAD TEMP
F
G
H
KX-FT21LA
SCHEMATIC DIAGRAM (DIGITAL CIRCUIT)
4 5
CIS LED ARRAY
T5
ON: 3.3V
T4
OFF: 0V
T3
T2
MOTOR ON: 3.3V
OFF: 0V
PRINTING 3.3V
WATCH DOG ERROR
5V (NORMAL)
5V
0V (WATCH DOG ERROR OCCUR)
KX-FT21LA
6 7 8
3.3V
0V
- 157 -
9 10 11 12