LG BH4120SN, Руководство по обслуживанию

Страница: 98 / 103

4-9
PIN NO. SYMBOL TYPE DESCRIPTION
E2 INE Analog Input Input of Sub-Beam Signal (E)
E1 INF Analog Input Input of Sub-Beam Signal (F)
D1 ING Analog Input Input of Sub-Beam Signal (G)
D2 INH Analog Input Input of Sub-Beam Signal (H)
F4 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.
F2 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.
F1 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.
K3 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.
G2 RFIN Analog Input Differential Input of AC Coupling RF SUM Signal (Negative)
H2 RFIN2 Analog Input Differential Input of AC Coupling RF SUM Signal (Negative)
G1 RFIP Analog Input Differential Input of AC Coupling RF SUM Signal (Positive)
H1 RFIP2 Analog Input Differential Input of AC Coupling RF SUM Signal (Positive)
J3 TLO Analog Output Tilt servo output
T2 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.
U4 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.
P2 FETRAYPWM Analog Output Tray DAC / PWM control output. Controlled by microP
A2 TRINA Analog Input Input of Tracking Signal (A)
B3 TRINB Analog Input Input of Tracking Signal (B)
A1 TRINC Analog Input Input of Tracking Signal (C)
B2 TRIND Analog Input Input of Tracking Signal (D)
J2 TRO Analog Output
Tracking servo output.
PDM output of tracking servo compensator.
H3 V14 Analog Output Output of voltage eference (1.4V)
E5 VDAC0 Analog Output Output of General DAC
B4 FVREF Analog Output Output of Voltage Reference
C6 VWDC2O Analog Output Output Voltage 2 of Laser Diode Control in APC
A4 VWDC3O Analog Output Output Voltage 3 of Laser Diode Control in APC