Epson DFX-8500 Service Manual page 92

Main Board
TMP95C061A
(IC2)
VX VP1 GP1
DRV-B Board
Printhead Driver
Circuit 2/2
VP2
R100
R101
ZD4
5.1V
GP2
Figure 2-27. Printhead Drive Circuit Block Diagram
FTMP
FANA
E05B36 (IC1)
FANAX
VX VP2 GP2
Printhead Driver Circuit
1/2
HPSENS
Monitoring NPNs
Short Circuit
Monitoring PNPs
Short Circuit
ZD1 24V
R98
R99
GP2
OPERATING PRINCIPLES
HF Motor Thermistor
HFANA
HF Motor
HFANB
Printhead Coils 1/2
Printhead Coils 2/2
HTMP
Printhead Thermistor
2-39