Samsung PCL545RX/XAA Service Manual page 174

Block Diagrams
8-5 Auto Convergence Block
Optical
Sensor
AMP
AMP
Analog
In
8-6 In/Out by Block
Pattern
In Sensor B'd
(light)
Analog
Interfacd B'd
Waveform
In
Serial
Cg Module
Data
8-12
LPF A/D
Serial
Interface
Analog
Signal
Out
Serial
Data
Cg
Waveform
Out
Cg Micom
8-7 Signal Connection by Block
Pattern
In Sensor B'd
(light)
Vcc
Interfacd B'd
Signal
In
Vcc
GND
CONVST
SCL
SDA
Vcc
Signal
Out
Vcc
GND
CONVST
SCL
SDA
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