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P-touch
SERVICE MANUAL

MODEL: PT-210E (For Europe)

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Содержание P-touch PT-210E

Страница 1: ...P touch SERVICE MANUAL MODEL PT 210E For Europe ...

Страница 2: ...P touch SERVICE MANUAL MODEL PT 210E For Europe ...

Страница 3: ...ht Brother 1998 All rights reserved No part of this publication may be reproduced in any form or by any means without permission in writing from the publisher Specifications are subject to change without notice ...

Страница 4: ...ne is always in best condition for the customer the service personnel must adequately understand and apply this manual This manual is made up of three chapters CHAPTER I SPECIFICATIONS CHAPTER II MECHANISMS CHAPTER III ELECTRONICS Note This service manual of the P touch PT 210E describes only different parts from the each part of the service manual No 5V2065BE0 which was published before We omit t...

Страница 5: ...1 2 Keyboard Refer to PT 220 P I 1 1 1 3 Display Refer to PT 220 P I 2 1 1 4 Printing Mechanism Refer to PT 220 P I 2 1 1 5 Tape Cassette Refer to PT 220 P I 3 1 1 6 Tape Cutter Refer to PT 220 P I 3 Key Arrangement I 1 1 2 ELECTRONICS SPECIFICATIONS I 2 1 2 1 Character Generator I 2 1 2 2 Power Supply I 2 1 3 SPECIAL KEY Refer to PT 220 P I 6 1 3 1 Format Refer to PT 220 P I 6 1 3 2 Demonstration...

Страница 6: ... Refer to PT 220 P II 14 6 Removing the sub PCB Refer to PT 220 P II 16 7 Removing the main PCB and the rubber 52 key Refer to PT 220 P II 17 2 2 2 Reassembly Procedure Refer to PT 220 P II 18 1 Installing the rubber 52 key and main PCB Refer to PT 220 P II 18 2 Installing the sub PCB Refer to PT 220 P II 19 3 Installing the battery terminals and battery terminal support Refer to PT 220 P II 20 4 ...

Страница 7: ...P touch SERVICE MANUAL Specifications I 1 Fig 1 1 2 Key Arrangement ...

Страница 8: ...pe cassette and then some at room temperature and normal humidity 4 Automatic power off Yes If the machine remains unused for approx 5 minutes it automatically powers itself off 5 Battery indication 1 Battery weak detection When using dry cell batteries if the battery voltage is detected to be 6 4 V or less at the A D terminals of the CPU twice in succession during printing the battery weak status...

Страница 9: ...in PCB III 1 3 2 2 CPU III 2 3 2 3 Key Contacts Matrix III 2 1 Key contacts matrix III 2 2 Solder points III 3 3 2 4 Power ON OFF Circuit and Power Saving Circuit III 4 1 Power ON OFF circuit III 4 2 Power saving circuit Refer to PT 220 P III 9 3 2 5 Motor Control Circuit Refer to PT 220 P III 10 3 2 6 Thermal Head Drive Circuit Refer to PT 220 P III 11 3 2 7 Voltage Detection Circuit and Temperat...

Страница 10: ...g failure Refer to PT 220 P III 18 2 Printing failure Refer to PT 220 P III 18 3 Powering failure Nothing appears on the LCD Refer to PT 220 P III 19 4 Abnormal LCD indication Refer to PT 220 P III 20 5 No key entry possible Refer to PT 220 P III 21 6 Tape cassette type not identified Refer to PT 220 P III 21 3 4 APPENDIX Refer to PT 220 P III 22 Sub PCB Circuit Diagram Refer to PT 220 P III 22 Ma...

Страница 11: ...P touch SERVICE MANUAL Electronics III 1 Fig 3 2 1 Block Diagram of Main PCB ...

Страница 12: ...ey is pressed the conductive paint of the key short circuits the paired electrodes carbon printed on the main PCB Fig 3 2 3 shows a timing chart and waveforms of key scanning by the CPU Ports P30 through P36 on the CPU produce a series of key scanning pulses Every scanning pulse is in low impedance for 1 ms while active and in high impedance while inactive Ports P40 through P47 act as input ports ...

Страница 13: ...oard and solder points Solder points 1 through 5 are connected to satisfy the specification of PT 210E Solder points A through H are reserved for future use for the thermal head ranking The CPU reads the solder point status once during powering on to confirm the specification Fig 3 2 4 Keyboard and Solder Points ...

Страница 14: ...s the process which eliminates the chattering part in the signal IRQ0 Powering on sequence See Fig 3 2 6 1 Interrupted by IRQ0 the CPU starts the chattering elimination program module 2 If P21 is Low for 10 ms the CPU recognizes the ON OFF key as being pressed and then transfers the control to the main program module If P21 is High the CPU interprets the input as a noise and waits for the next IRQ...

Страница 15: ...he VAD rises over approx 15 4V the CPU immediately shuts down the power If the voltage level of the VAD drops below approx 6 9V the CPU immediately shuts down the power During non printing If the voltage level of VAD drops below approx 6 9V the CPU immediately shuts down the power During printing If the voltage level of the VAD rises over approx 15 4V the CPU displays message A below and immediate...

Страница 16: ... and generates an oscillation at 20 MHz which act as the CPU basic clock The CPU divides this into half 10 MHz to synchronize its internal operations Fig 3 2 14 Oscillation Circuit 3 2 9 Reset Circuit Fig 3 2 15 shows the reset circuit If the 5BV drops abnormally this circuit prevents the CPU from operating erroneously Fig 3 2 15 Reset Circuit ...

Страница 17: ...III 7 ...

Страница 18: ...June 98 5V2072BE0 Printed in Japan ...

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