Epson TM-U950 Technical Manual

Rev. A Mechanism Configuration and Operating Principles 2-29
TM-U950/U950P Technical Manual
Reset circuit for the TM-U950
The reset IC (M51953BFP) monitors the +5 V voltage. When the voltage becomes more than 4.5
V, the IC releases the reset condition for the CPU and other circuits, thus enabling normal
printer operation. When a reset signal from the host is sent from the host interface (DSR, #25)
more than 1 ms, the output of the reset IC becomes low and the CPU and other circuits are reset.
Reset circuit for the TM-U950P
The reset IC (M51953BFP) monitors the +5 V voltage. When the voltage becomes more than 4.5
V, the IC releases the reset condition for the CPU and other circuits, thus enabling normal
printer operation. When the interface reset signal (nInit, #31) is added to the reset circuit more
than 50 µs when the host interface is in forward direction transmission (I/F signal 1284 ACT, #36
is low), the reset IC becomes low and the CPU and other circuits are reset.
Figure 2-44. Reset Circuit for the TM-U950
Figure 2-44a. Reset Circuit for the TM-U950P
Q10
8
7
1
2
DSW2
DM1
3
Q4
RESCTL
SG
R14
R11
+
C17
_
C19
R12
IN OUT
5
7
C GND
4
6
R13
C35
RESET OUT
+5V
+5V
nInit
1284ACT
CN1
CONFIDENTIAL

Epson TM-U950 Specifications

General

Print speed	18.6 ips
Character size	1.3 x 3.1 mm
Print technology	Dot matrix
Paper dimensions	210 x 297 mm
Dimensions (WxDxH)	251 x 298 x 194.5 mm
Electromagnetic compatibility	VCCI, FCC, CE
Safety	UL, CSA
Country of origin	China
Mean time between failures (MTBF)	180000 h
Serial interface	Yes
Standard interfaces	RS-232C
Weight (imperial)	12.3 lbs
Pallet width	1200 mm
Pallet height	1000 mm
Pallet length (UK)	2250 mm
Quantity per pallet	24 pc(s)
Quantity per pallet (UK)	36 pc(s)
Quantity per pallet layer	4 pc(s)
Harmonized System (HS) code	84433210
Quantity per pallet layer (UK)	6 pc(s)
Package depth	425 mm
Package width	360 mm
Package height	330 mm
Package weight	7196 g
Quantity per pack	1 pc(s)

Weight and Dimensions

Depth	298 mm
Width	186 mm
Height	195 mm