Casio DL-270B, DR-220TA Service Manual
DL-270B (ZX-510IY)
INDEX
DR-220TA (ZX-510AY)
NOV. 1995
(without price)
DR-220TADL-270B
R
CONTENTS
1. SPECIFICATIONS ......................................................................................................... 1
2. BLOCK DIAGRAM ........................................................................................................ 2
3. CPU (MN158418YCY) PIN FUNCTION......................................................................... 3
4. TROUBLESHOOTING................................................................................................... 4
5. DIAGNOSTIC................................................................................................................. 5
6. SCHEMATIC DIAGRAMS ............................................................................................. 6
7. DISASSEMBLY VIEW ................................................................................................... 8
8. PARTS LIST .................................................................................................................. 9
1. SPECIFICATIONS
Functions: 4 basic arithmetic operations (+, -, ×, ÷), constants for ×/÷, sub-total/total/
grand total, item counting, ADD mode calculations, repeat calculations,
memory calculations, percentage calculations and various kinds of practical
calculations.
Decimal point: Full floating, and fixed (0, 1, 2, 3, 4 or 6) with round-off, round-up or cut-off.
Capacity: 12 digits
Display: Digitron tube panel
Ambient temperature range: 0°C ~ 40°C (32°F ~ 104°F)
Power supply: AC 100/120/220 or 240 V (±10 V), 50/60 Hz ••••• Fixed
*Rated current and voltage are printed on the calculator.
Dimensions: 83 mmH × 214 mmW × 376 mmD
(3 1/4"H × 8 3/8"W × 14 3/4"D) including rollholder.
Weight: 1.7 kg (3.8 lbs)
— 1 —
2. BLOCK DIAGRAM
Slide switch
Keyboard
Segment signal
S1 ~ S7, SAP, SDP
SO1 ~ SO7
SI1 ~ SI3, SI5
KO1 ~ KO8
KI1 ~ KI6
Display tube
SC131MH
CPU
MN158418YCY
VDD
GND
VSS
Digital signal
D1 ~ D13
Ribbon shift signal
Character selective signal
Timing pulse
Motor control signal
VF1, VF2
Printer
M-80
Power supply
circuit
Motor power supply
Detector power supply
— 2 —
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