Service Manual for
DT-750
(PX-799)
DT-766 I/O Box
(PX-935)
Date: December 1996
DT-750
DT-766 IOE
CONTENTS
DT-750 (PX-799)
Page
1.
Specification
1
2.
Option
3
3.
Mac operation
6
4.
The detection of battery consumption
6
5.
Main components
6
6.
Rechargeable Nickel-metal Hydride Cell
7
7.
Block diagram
8
8.
Disassembly and Assembly
12
9.
Diagnostic program
16
10. Circuit diagram
36
11. IC data
48
12. Parts list
50
DT-766 I/O Box (PX-935)
1.
Each part name and a work
55
2.
Specification
56
DT-769 CHG
1.
Each part name and a work
57
2.
Specification
57
DT-720 CHG
1.
Each part name and a work
58
2.
Specification
58
3.
Parts list
59
Page 1
1. Specification
CPU
32 bit RISC CPU
RAM
1M byte
Display Type:
FSTN semi-transparent LCD
Resolution:
96 X 48 dots
Font sizes / screen:
6 dots mode: ANK:
6 X 7 dots
16 Columns X 4 Lines
Normal:
6 X 12 dots
16 Columns X 8 Lines
Double:
12 X 12 dots 8 Columns X 4 Lines
8 dots mode: ANK:
8 X 8 dots
12 Columns X 6 Lines
Normal:
8 X 16 dots
12 Columns X 3 Lines
Double:
16 X 16 dots 6 Columns X 3 Lines
Indication character type:
ANK, Kanji character, JIS first & second standard,
129 of Optional character
Back light:
LED
Contrast:
16 phases by Electronic volume
Scanner
System:
Semiconductor laser
Wavelength:
Approx. 670 nm
Light output:
J.I.S. Class 2 laser
Scanning speed:
100 scan/sec.
Resolution:
0.15 mm (Min.)
Readable PCS:
More than 0.45
(more than 51% of reflection rate for space & margin)
Readable range:
0 to 380mm(as of 1.0 mm of the resolution ability)
Readable bar code width:
Direct contact:
55mm (max.)
From 380 mm:
210 mm (max.)
Activity luminance:
3,000 Lux ~ 8,000 Lux
Readable code:
WPC, NW7, CODE39, ITF, CODE93, CODE128
Confirmation:
One 2-color LED
Number of keys
26 (Including scanning triger keys)
Interface
3-pin interface:
150 Kbps (between DT-750 units)
1,200 bps to 38.4 Kbps
Infrared interface
Casio original protocol
1,200 bps to 19.2 Kbps
Page 2
Main power supply
Rechargeable Ni-MH battery pack
Memory backup
CR2032 battery X 1 pc
Operating duration
Approximately 20 hours of intermittent operation
Outer dimensions
Approximately 175(L) X 55(W) X 25.4(H) mm
Weight
Approximately 220 g
Environmental data
Drop durability:
1.5 m
Operating temperature: -5 to 50 Centigrade temperature
Water standard:
Conforms with IPXII
Soft ware
Basic data collection:
Casio data entry tool (for parameter setting
by editor)
Compiler:
SHC (Hitachi)
M. T. B. F.
Stroke key:
over 300,000 times
Battery cover:
over 5,000 times
Scanner:
over 5,000 hours
Page 3
2. Option
1) Cable
DT-581/582/583RSC-E
DT-581RSC-E
Straight cable for I/O box ( 25 pin male - 25 pin male )
DT-582RSC-E
Cross cable for I/O box ( 25 pin male - 25 pin male )
25 pi n
25 pi n
I /O Box
Host
Si gnal
Pi n
Pi n Si gnal
FG
1
1
FG
SD
2
2
SD
RD
3
3
RD
RS
4
4
RS
CS
5
5
CS
DR
6
6
DR
SG
7
7
SG
CD
8
8
CD
ER
20
20
ER
25 pi n
25 pi n
I /O Box
Host
Si gnal
Pi n
Pi n Si gnal
FG
1
1
FG
SD
2
2
SD
RD
3
3
RD
RS
4
4
RS
CS
5
5
CS
DR
6
6
DR
SG
7
7
SG
CD
8
8
CD
ER
20
20
ER