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Samsung SRP-350PG Service Manual - Page 91

Samsung SRP-350PG - SRP 350 B/W Direct Thermal Printer Manual

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9 Troubleshooting 9-10 USB Communication Problem USB Problem Main PBA I/F Y Failure? N 1. Check the Control Line & Signal(CS3, RD, WR, INT) 2. Check the Data Line & Signal 3. Check the Connector(34P) 4. Check the Clock(48MHz) 5. Check the related Circuit and Pattern on I/F PBA & Main PBA Host Comm Failure? N End Y 1. Check the Clock(48MHz) 2. Check the D+ whether it is Pull up to V3.3 3. Check the Host whether it works correctly 4. Check the USB Cable whether it is open or short 5. Check the related Circuit and Pattern on I/F PBA 9-10 Samsung Electro-Mechanics

Section	Page
00 COVER	1
01 PRECAUTION STATEMENTS	5
1-1 SAFETY PRECAUTIONS	5
1-2 SERVICING PRECAUTIONS	6
1-3 PRECAUTIONS FOR ELECTROSTATICALLY SENSITIVE DEVICES (ESDs)	6
1-4 OPERATIONAL PRECAUTIONS	7
02 PRODECT SPECIFICATIONS	9
2-1 GENERAL SPECIFICATIONS	9
2-2 APPEARANCE	10
2-3 THERMAL PRINTER SPECIFICATIONS	12
2-4 SMPS SPECIFICATIONS	16
2-5 INTERFACE SPECIFICATIONS	17
2-6 DRAWER KICK-OUT SPECIFICATIONS	25
03 INSTALLATION AND OPERATION	27
3-1 INSTALLATION	27
3-2 OPERATION	30
04 DISASSEMBLY AND ASSEMBLY	35
4-1 CASE-LOWER BLOCK	35
4-2 CASE-UPPER BLOCK	37
4-3 FRAME BLOCK	40
05 MAINTENANCE AND ADJUSTMENTS	43
5-1 ADJUSTMENT	43
5-2 MAINTENANCE	45
06 REFERENCE INFORMATION (SEMICONDUCTOR BASE DIAGRAM)	46
07 SPECIAL CIRCUIT DESCRIPTIONS	52
7-1 POWER CIRCUIT	52
7-2 RESET CIRCUIT	53
7-3 BUZZER AND CASH DRAWER DIRCUITS	54
7-4 I/F PBA DETECT BLOCK DIAGRAM	55
7-5 RS-485 COMMUNICATION BLOCK DIAGRAM	57
7-6 PARALLEL COMMUNICATION BLOCK DIAGRAM	58
7-7 USB COMMUNICATION BLOCK DIAGRAM	59
7-8 DIP SWITCH CIRCUIT	60
7-9 THERMAL PRINTER CIRCUIT	61
08 CONTROL COMMANDS	82
9-1 POWER PROBLEM	82
9-2 SYSTEM PROBLEM	83
9-3 PANEL PBA AND SENSOR PROBLEM	84
9-4 THERMAL PRINTER AND FEED MOTOR PROBLEM	85
9-5 AUTO CUTTER AND DRAWER PROBLEM	86
9-6 DIP S/W AND I/F PBA SELECT PROBLEM	87
9-7 RS-232C SERIAL COMMUNICATION PROBLEM	88
9-8 RS-485 SERIAL COMMUNICATION PROBLEM	89
9-9 IEEE1284 PARALLEL COMMUNICATION PROBLEM	90
9-10 USB COMMUNICATION PROBLEM	91
10 EXPLODED VIEWS AND PARTS LIST (MAIN SET)	112
13 WIRING DIAGRAM	114
14 SCHEMATIC DIAGRAMS	116
14-1 MAIN CIRCUIT DIAGRAMS	116
14-2 SERIAL INTERFACE DIAGRAMS (RS-232C)	121
14-3 SERIAL INTERFACE DIAGRAMS (RS-485)	122
14-4 PARALLEL INTERFACE DIAGRAMS (IEEE1284)	123
14-5 USB INTERFACE DIAGRAMS (UNIVERSAL SERIAL BUS)	124

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Samsung Electro-M

chanics