The thermal head energy is controled by changing pulse width.
The pulse is controlled by the ENL signal from the main board corresponding
to ENLTRIG from the image processing board.
Thermal head voltage (VHD: 19V~24V) is applied from PSU only during the
master making process. This is controlled by the VHDCNT signal
(CN104-33) from the main board.
VHDCNT (CN104-33)
VHD (CN505-1)
(CN505-3)
0 V 19~24 V
5 V 0 V
ENLTRIG
ENL
Pulse width
CN701-1
CN701-2
CN701-3
CN701-4
CN505-4
CN505-5
CN505-1
CN505-3
VHD
VHD
GND
GND
CN504-1
CN104-33
VHD
CNT
Main Board
PSU
Thermal Head
Thermal
Head
Voltage
Circuit
Detailed
Descriptions
C216 2-5 SM
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