LG LHB645, Service Manual

Page: 108 / 113

4-7
PIN NO. SYMBOL TYPE DESCRIPTION
C3 IND Analog Input Input of Main Beam Signal (D)
D2 INE Analog Input Input of Sub-Beam Signal (E)
D3 INF Analog Input Input of Sub-Beam Signal (F)
C2 ING Analog Input Input of Sub-Beam Signal (G)
C1 INH Analog Input Input of Sub-Beam Signal (H)
G6 MPXOUT1 Analog Output
Multiplexer Output 1 for Signal Monitoring.
The pin is not allowed to pull-up in circuit layout.
Alternate function : Internal monitored signal output / General
output.
G5 MPXOUT2 Analog Output
Multiplexer Output 2 for Signal Monitoring. T
he pin is not allowed to pull-up in circuit layout.
Alternate function : Internal monitored signal output / General
output.
F4 MPXOUT3 Analog Output
Multiplexer Output 3 for Signal Monitoring.
The pin is not allowed to pull-up in circuit layout.
Alternate function : Internal monitored signal output / General
output.
K2 FEOSCEN
3.3V LVTTL I/O,
5V-tolerance,
Slow slew,
2, 4, 6, 8 mA PDR,
75K pull-up (3.3 V)
High frequency modulation enable signal output, or LDD serial
interface CLK or 12C SCL.
The pin is spike-free at power-on stage.
G1 RFIN Analog Input Differential Input of AC Coupling RF SUM Signal (Negative)
G2 RFIP Analog Input Differential Input of AC Coupling RF SUM Signal (Positive)
G3 TLO Analog Output Tilt servo output
M1 FETRAYIN_
3.3V LVTTL I/O,
5V-tolerance,
6 mA,
75K pull-up (3.3 V)
Tray_is_in Input. A Logical Low Indicates the Tray is IN. Feed-
back Flag is from Tray Connector.
The pin is spike-free at power-on stage.
Alternate function : General IO.
L3 FETRAYOUT_
3.3V LVTTL I/O,
5V-tolerance,
6 mA,
75K pull-up (3.3 V)
Tray_is_out Input. A Logical Low Indicates the Tray is OUT.
Feedback Flag is from Tray Connector.
The pin is spike-free at power-on stage.
Alternate function : General IO.
P3 FETRAYPWM Analog Output Tray DAC / PWM control output. Controlled by microP
E1 TRINA Analog Input Input of Tracking Signal (A)
E2 TRINB Analog Input Input of Tracking Signal (B)
F3 TRINC Analog Input Input of Tracking Signal (C)
F2 TRIND Analog Input Input of Tracking Signal (D)
H4 TRO Analog Output
Tracking servo output.
PDM output of tracking servo compensator.
E3 V14 Analog Output Output of voltage eference (1.4V)
A2 VDAC0 Analog Output Output of General DAC
A3 FVREF Analog Output Output of Voltage Reference
C4 VWDC2O Analog Output Output Voltage 2 of Laser Diode Control in APC
B3 VWDC3O Analog Output Output Voltage 3 of Laser Diode Control in APC