Citizen Systems CBM-710/720 service manual Contents

	CONTENTS
Chapter 1. Printer Disassembly and Assembly		1
1	How to Remove Upper Cover and Rear Cover	2
2	How to Remove The Printer Mechanism	3
3	How to Remove the Control Board	3
4	How to Remove the Power Board and AC power Unit	4
5	How to Remove the Auto Cutter (CBM-720 only)	5
6	How to Remove the Operation Panel and PE Sensor	5
Chapter 2. Circuit Description		6
1	Outline	7
2	CPU Peripheral Circuit	8
3	Printer Control Circuit	10
4	Cutter Control Circuit	11
5	Interface and Operation Panel	12
6	Paper End Sensor Circuit	13
7	Parallel Interface Circuit	14
8	Serial Interface Circuit	16
9	RS422A interface Circuit	18
10	Power Supply Circuit	19
Chapter 3. Auto Cutter		20
1	Maintenance and Handling	21
2	Mechanism and Principle of Operation	22
3	Repairing and Troubleshooting	24
4	Disassembly and Assembly	26
Chapter 4. Circuit Diagram		28
1	Power Supply Circuit	29
2	Noise Filter Circuit	30
3	Operation Panel Circuit	30
4	Paper End Sensor Circuit	30
5	OP Junction Circuit	31
6	Parallel	32
7	RS232C	33
8	PS422A	34
Chapter 5. Parts List		35
1	Exploded View	36
2	Block Diagram	41
3	Power Supply Unit	43
4	Noise Filter Unit	45
5	Control Board Unit: RS232C	47
6	Control Board Unit: Parallel	51
7	Control Board Unit: RS422A	55
8	OP Panel/PE Detector/OP Junction Unit	59
9	Auto Cutter	63
10	Winder	67

i