Casio DL-270B Service Manual Download | Manualshive

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Display tube

SC131MH

CPU

MN158418YCY

Power supply

circuit

Slide switch

Keyboard

Printer

M-80

VF1, VF2

Ribbon shift signal

Character selective signal
Timing pulse

Digital signal
D1 ~ D13

Motor control signal

Motor power supply
Detector power supply

VDD
GND
VSS

Segment signal
S1 ~ S7, SAP, SDP

SO1 ~ SO7

SI1 ~ SI3, SI5

KO1 ~ KO8

KI1 ~ KI6

2.

BLOCK DIAGRAM

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Summary of Contents for DL-270B

Page 1: ...R without price NOV 1995 DL 270B ZX 510IY DR 220TA ZX 510AY DR 220TA DL 270B INDEX ...

Page 2: ...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 ...

Page 3: ...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 ...

Page 4: ...itch Keyboard Printer M 80 VF1 VF2 Ribbon shift signal Character selective signal Timing pulse Digital signal D1 D13 Motor control signal Motor power supply Detector power supply VDD GND VSS Segment signal S1 S7 SAP SDP SO1 SO7 SI1 SI3 SI5 KO1 KO8 KI1 KI6 2 BLOCK DIAGRAM ...

Page 5: ...PP VDD OCS1 OCS2 VSS SYNC RST Function Common signal for keyboard Key signal from keyboard Timing pulse signal from printer Not used VDD 33 V 30 mA Motor control signal Ribbon shift signal for printer Character selective signal for printer Character selective signal for printer Segment signal for display Segment signal for display Common signal for slide switch VDD 33 V 30 mA Signal from slide swi...

Page 6: ...r Defective LSI Short or open circuits between digit signals and segment signals Defective display tube Timing signal is bad Defective printer magnet Checkpoint Secondary voltage of transformer Waveforms of each pin VF1 VF2 Signal D1 S1 Between LSI and display tube Note VDD VSS VM VF1 and VF2 are OK Check the pulse signals from LSI If VF1 VF2 Digit and Segment signals are OK VM 11V while printing ...

Page 7: ... ADD PRINT 5 4 ADD ITEM 5 4 ADD ITEM 5 4 ADD ITEM 5 4 ADD ITEM 5 4 ADD ITEM 5 4 ADD OPERATION 1 00 TM C 8 9 CA 1 2 3 4 7 6 5 M M M 5 MU MD M M CA 1 1 X 1 1 G FEED AC 1 K 0 01 1 0 01 0 01 X 1 0 01 0 01 0 01 0 02 002 0 02 0 01 001 0 03 001 0 03G Paper feeding 0 NOTE The character with will be printed by red ink Press the button 2 or 3 seconds continuously STEP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ...

Page 8: ... 6 6 SCHEMATIC DIAGRAMS 6 1 Main Board ...

Page 9: ... 7 6 2 Key Matrix 6 2 Key Matrix ...

Page 10: ...13 16 17 18 18 21 19 20 22 23 24 25 26 Power Cord Black Projection side Projection side Marking side Brown Blue Brown Blue Transformer Black Yellow Blue Black Black White Black Red Connection Voltage 100V 120V 220V 240V 7 DISASSEMBLY VIEW ...

Page 11: ... 9 ...

Page 12: ... 10 ...

Page 13: ...8 11 10 Nishi Shinjuku Shinjuku ku Tokyo 160 Japan Telephone 03 3347 4926 ...

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