Service Manual
System Outline
4-4
Signal Transition of DAA Solution
Line Interface Signal of Tel Line and LSD is Analog Signal.
2) there is A/D, D/A Converter in LSD, so Analog Signal from Tel Line is converted in Digital through A/D
Converter in DAA and transfer to SSD by DIB Capacitor
Digital Signal from SSD is converted to Analog by D/A Converter in DAA and transfer to Tel Line
Transformer transfer Clock from SSD to LSD and Clock Frequency is 4.032MHz.
LSD full wave rectifies Clock to use as inner Power supply and also use as Main Clock for DIB Protocol
Sync between LSD and SSD. Transformer transfer Clock by separating Primary and Secondary, and
amplifies Clock Level to LSD by Coil Turns Ratio 1:1.16.
Clock
- Clock is supplied by transformer from SSD to LSD, and there is PWROUT to adjust output impedance of
Clock
Out Driver is inside SSD and CLKSHIGH Resistor to adjust duty of HLPWR Resistor and Clock.
Clock from SSD to LSD has Dif ferential structure of 180 phase difference for Noise Robustness
DIB Data transfer Data from SSD to LSD by Transformer, and also transfer specific data from LSD to SSD.
After transferring data from SSD, RSP is transferred and LSD recognizes RSP and change LSD to output
Driver transfer Data to SSD.
DIB Data form SSD to LSD by Transformer has Differential structure of 180 phase difference between DIBP
and DIBN for Noise Robustness
LSD
SSD
CLKP
CLKN
DIBP
DIBN
Summary of Contents for 1815 Mono Laser
Page 1: ...Dell 1815dn Service Manual 27 Mar 2006 ...
Page 28: ...Service Manual System Outline 4 10 ...
Page 126: ...Exploded View Parts List Service Manual 8 3 8 2 Cover Ass y 0 1 2 2 3 2 1 2 2 3 4 5 5 1 5 2 6 ...
Page 127: ...Service Manual Exploded View Parts List 8 4 8 3 Middle Cover Ass y 0 1 2 3 4 5 6 6 ...
Page 129: ...Service Manual Exploded View Parts List 8 6 8 5 Rear Cover Ass y 0 1 2 3 7 4 5 6 8 ...
Page 131: ...Service Manual Exploded View Parts List 8 8 8 7 Fuser Drive Ass y 0 1 2 3 5 5 6 7 8 9 4 ...
Page 132: ...Exploded View Parts List Service Manual 8 9 8 8 Main Drive Ass y 0 2 4 1 3 5 6 8 7 6 7 3 ...
Page 136: ...Exploded View Parts List Service Manual 8 13 8 12 OPE Unit 0 1 2 3 4 5 6 7 8 ...
Page 149: ...Block Diagram Service Manual 9 1 9 9 9 Block Diagram ...
Page 150: ...Connection Diagram Service Manual 10 1 10 10 10 Connection Diagram ...