Epson TM-U950 Technical Manual

2-30 Mechanism Configuration and Operating Principles Rev. A
Main Board Operating Principle
Power supply circuit for the TM-U950
The 24 V DC at CN6 (when IM-403/405 is not connected) or at CN9 (when IM-403/405 is
connected) is filtered and supplied to the +24 V line and the +5 V regulator circuit. The +5 V
regulator circuit uses the switching method to convert the +24 V input into a +5 V output. The
switching regulator IC (U9) switches the +24 V DC. The voltage is smoothed by L18, D13, and
C49, and is supplied as the +5 V output.
Power supply circuit for the TM-U950P
The 24 V DC at CN6 is filtered and supplied to the +24 V line and the +5 V regulator circuit. The
+5 V regulator circuit uses the switching method to convert the +24 V input into a +5 V output.
The switching regulator IC (U9) switches the +24 V DC. The voltage is smoothed by L18, D13,
and C49, and is supplied as the +5 V output.
Figure 2-45. Power Supply Circuit for the TM-U950
FG
1
2
2
1
CN1
C27
+
C51
_
+
C49
_
CN6
U9
L18
D13
C28
D14
F1
R10
C10
1
2
3
4
1
2
3
SH
L12
12
3
4
R224
+5V
SG
+24V
GP
FG
1
2
( TO
POWER SW )
IN
GND
NC
+24V
+24V
+24V
G
N
D
VIN SW
F/B
Figure 2-45a. Power Supply Circuit for the TM-U950P
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