Samsung Electronics
5-31
Circuit Description
5-6-10 Cover Open S24V)
“Cover Open Sensor” is placed on the left top of
Printer. If the front cover is open or Developer unit
is placed in, the Printer does not operate.
5-6-11 Paper S5V)
There are three Sensors for the paper in the Printer:
1) Paper Empty Sensing
It is placed in Paper Cassette, and senses if there
are papers in Cassette.
2) Paper Feed Sensing
It is placed before Transfer process, and senses if
the paper is feeding. When the paper feeding is
sensed by it, Printer image data is output to LSU.
3) Paper Check
It is placed on the side of paper path. When
narrow paper(width is more than ???mm) is
feeding, the paper don’t touch the actuator, and it
is sensed the narrow paper. The Printer Engine
check resistance of Transfer Roller and the
feeding paper, if the feeding paper width is
narro w, THV according to the resistance outputs
higher voltage than wide paper.
4) Exit Sensing
It is placed in the exit of Printer, and senses the
paper exit.
5-6-12 LSU Control
LSU is composed of a polygon mirror motor and a
laser gun part. The polygon mirror motor starts
rotation by ‘PMOTOR” signal and reaches the
constant speed, “LREADY” signal outputs “High”
f
rom LSU. And when video image signal fro m
Video Controller is applied to Laser Gun, it fire the
laser beam. And the polygon mirror reflects and
scans the beam horizontally. When the scanned laser
beam reaches at the side of LSU, “HSYNC” outputs
one pulse. Video controller synchronizes this signal,
and outputs the left edge of image.
5-6-13 Toner Check
Toner sensor is placed in the rear of Developer unit
to check the toner supply. During warming up and
printing, the controller checks the output signal of
toner sensor. If toner is sufficient, the output signal
of †oner sensor is High, and if not, the output signal
is Low. When the output signal of toner sensor
remains low for more than 5 seconds, controller
judges. Toner is insufficient, and displays ‘Toner
low’. In toner low condition, the printer prints
approximately 300 sheets. Then the controller
displays ‘Toner Empty.
’
Summary of Contents for MSYS 5150
Page 9: ...2 6 Samsung Electronics Specification Memo ...
Page 16: ...3 26 Samsung Electronics Setup and Installing Memo ...
Page 37: ...4 2 Samsung Electronics Theory of Operation ...
Page 41: ...4 6 Samsung Electronics Memo Theory of Operation ...
Page 116: ...Samsung Electronics 7 9 Maintenance Troubleshooting No Image ...
Page 117: ...Samsung Electronics Maintenance Troubleshooting 7 10 ...
Page 118: ...Samsung Electronics 7 11 Maintenance Troubleshooting All Black ...
Page 119: ...7 12 Samsung Electronics Maintenance Troubleshooting Vertical White Line Band ...
Page 120: ...Samsung Electronics 7 13 Maintenance Troubleshooting Dark Image ...
Page 121: ...7 14 Samsung Electronics Maintenance Troubleshooting Background ...
Page 122: ...Samsung Electronics 7 15 Maintenance Troubleshooting Ghost ...
Page 123: ...7 16 Samsung Electronics Maintenance Troubleshooting Black Dot ...
Page 124: ...Samsung Electronics 7 17 Maintenance Troubleshooting Horizontal Band ...
Page 125: ...7 18 Samsung Electronics Maintenance Troubleshooting Irregular Density ...
Page 126: ...Samsung Electronics 7 19 Maintenance Troubleshooting White Spot ...
Page 127: ...7 20 Samsung Electronics Maintenance Troubleshooting Trembling at the End When OHP Printing ...
Page 128: ...Samsung Electronics 7 21 Maintenance Troubleshooting Poor Fusing Grade ...
Page 132: ...Samsung Electronics 7 25 Maintenance Troubleshooting No Power LCD NO display LED Off ...
Page 133: ...Fuser Error 7 26 Samsung Electronics Maintenance Troubleshooting ...
Page 134: ...Samsung Electronics 7 27 Maintenance Troubleshooting Paper Jam Mis feeding ...
Page 135: ...7 28 Samsung Electronics Maintenance Troubleshooting Paper Jam Jam1 ...
Page 136: ...Samsung Electronics Maintenance Troubleshooting 7 29 Engine Error ...
Page 137: ...7 30 Samsung Electronics Maintenance Troubleshooting Memo ...
Page 187: ...9 28 Samsung Electronics Electrical Parts List ...
Page 189: ...11 Connection Diagram Samsung Electronics 11 1 ...
Page 190: ...12 1 Main Circuit Diagram Samsung Electronics 12 1 12 Schematic Diagrams ...
Page 191: ...Schematic Diagrams 12 2 Samsung Electronics Main Circuit Diagram ...
Page 192: ...Main Circuit Diagram Samsung Electronics 12 3 Schematic Diagrams ...
Page 193: ...Schematic Diagrams 12 4 Samsung Electronics Main Circuit Diagram ...
Page 194: ...Main Circuit Diagram Samsung Electronics 12 5 Schematic Diagrams ...
Page 195: ...Schematic Diagrams 12 6 Samsung Electronics Main Circuit Diagram ...
Page 196: ...Main Circuit Diagram Samsung Electronics 12 7 Schematic Diagrams ...
Page 200: ...12 3 Sensors Circuit Diagram Samsung Electronics 12 11 Schematic Diagrams ...
Page 201: ...Schematic Diagrams 12 12 Samsung Electronics 12 4 Switch Circuit Diagram ...
Page 202: ...Samsung Electronics 12 13 Schematic Diagrams 12 5 Joint Circuit Diagram ...
Page 204: ...Samsung Electronics 12 15 Schematic Diagrams 12 7 PTL Circuit Diagram ...
Page 205: ...Schematic Diagrams 12 16 Samsung Electronics 12 8 SCAN Circuit Diagram ...
Page 206: ...Samsung Electronics 12 17 Schematic Diagrams 12 9 Engin Circuit Diagram ...
Page 207: ...Schematic Diagrams 12 18 Samsung Electronics Engin Circuit Diagram ...
Page 208: ...Samsung Electronics 12 19 Schematic Diagrams 12 10 LIU Circuit Diagram ...
Page 210: ... Samsung Electronics Co Ltd Mar 1999 Printed in Korea P N JC68 00097A Rev 1 00 ELECTRONICS ...