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Samsung SRP-350PG Service Manual - Page 82

This describes the methods for troubleshooting in this Receipt Printer.

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9 Troubleshooting This chapter describes the methods for troubleshooting in this Receipt Printer. 9-1 Power Problem Power Problem Power Out N Ok? On SMPS Y 1. Check the Input/Output Power Cable 2. Replace the Adapter(SMPS). Power VDR (+24V) Ok? Y Power VTPH (+24V) Ok? Y Power VCC (+5V) Ok? Y N 1. Check the Fuse(FU1) 2. Check the Harness of Power S/W 3. Check the related Circuit & Pattern N 1. Check the TR(Q3, Q4) 2. Check the On/Off Signal on CPU N 1. Check the IC34063(U5) 2. Check the related Circuit & Pattern 3. Check the generated Frequency End Samsung Electro-Mechanics 9-1

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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This chapter describes the methods for troubleshooting in this Receipt Printer.

Samsung Electro-M

chanics