Read Sharp LC-26P55E (serv.man10) Service Manual online
64
LC-26GA5E
LC-32GA5E
LC-26P55E
LC-32P55E
LC-37P55E
ADVANCE INFORMATION
VCT 69xyP
Volume 1: General Description
Micronas
November 3, 2004; 6251-644-1-1
AI
1-65
3.13.Pin Descriptions
3.13.1.Supply Pins
VSUP1.8DIG
− Supply Voltage 1.8 V
This pin is main and standby supply for the digital core
logic of controller, video and display processing.
VSUP1.8FE
− Supply Voltage 1.8 V
This pin is main and standby supply for the analog
video frontend.
VSUP3.3FE
− Supply Voltage 3.3 V
This pin is main and standby supply for the analog
video frontend.
VSUP3.3VO
− Supply Voltage 3.3 V
This pin is main and standby supply for the analog
video outputs.
VSUP1.8LVDS
− Supply Voltage 1.8 V
This pin is main and standby supply for the analog
LVDS core.
VSUP3.3LVDS
− Supply Voltage 3.3 V
This pin is main and standby supply for the Digital
LVDS port.
VSUP3.3FL
− Supply Voltage 3.3 V
This pin is main and standby supply for the Flash
device.
VSUP3.3DRI
− Supply Voltage 3.3 V
This pin is main supply for the digital RAM interface.
VSUP3.3RAM
− Supply Voltage 3.3 V
This pin is main supply for the RAM device
VSUP3.3IO 1-3
− Supply Voltage 3.3 V
This 3 pins are main and standby supply for the digital
I/O-ports.
VSUP3.3COM
− Supply Voltage 3.3 V
This pin is main and standby supply for the digital Input
ports and common digital logic.
VSUP3.3DIG
− Supply Voltage 3.3 V
This pin is main supply for the digital core logic of IF
and audio processing and digital video backend.
VSUP8.0AU
− Supply Voltage 8.0 V
This pin is main supply for the analog audio process-
ing.
VSUP5.0SIF
− Supply Voltage 5.0 V
This pin is main supply for the SIF processing.
VSUP3.3DAC
− Supply Voltage 3.3 V
This pin is main and standby supply for the Analog
DAC.
GND*
− Ground
This pin are main ground for all digital analog and port
supplies.
Application Note:
All GND pins must be connected to a low-resistive
ground plane underneath the IC. All supply pins must
be connected separately with short and low-resistive
lines to the power supply. Decoupling capacitors from
VSUPxx to GND have to be placed as closely as pos-
sible to these pins. It is recommended to use more
than one capacitor. By choosing different values, the
frequency range of active decoupling can be extended.
3.13.2.Audio Pins
VREFAU – Reference Voltage for Analog Audio
This pin serves as the internal ground connection for
the analog audio circuitry. It must be connected to the
GND pin with a 3.3
µF and a 100 nF capacitor in paral-
lel.
SGND
− Analog Reference Input
This is the reference ground Analog Audio part.
AIN1 R/L – Audio 1 Inputs
The analog input signal for audio 1 is fed to this pin.
Analog input connection must be AC coupled.
AIN2 R/L – Audio 2 Inputs
The analog input signal for audio 2 is fed to this pin.
Analog input connection must be AC coupled.
AIN3 R/L – Audio 3 Inputs
The analog input signal for audio 3 is fed to this pin.
Analog input connection must be AC coupled.
AIN4 R/L – Audio 4 Inputs
The analog input signal for audio 4 is fed to this pin.
Analog input connection must be AC coupled.
AIN5 R/L – Audio 5 Inputs
The analog input signal for audio 5 is fed to this pin.
Analog input connection must be AC coupled.
AOUT1 R/L – Audio 1 Outputs
Output of the analog audio 1 signal. Connections to
these pins are intended to be AC coupled.
AOUT2 R/L – Audio 2 Outputs
Output of the analog audio 2 signal. Connections to
these pins are intended to be AC coupled.
SPEAKER R/L – Loudspeaker Outputs
Output of the loudspeaker signal.
HEADPHONES R/L –
H
eadphones Outputs
Output of the headphones signal.
2.2.2. Pin Descriptions
2.2.2.1. Supply Pins
2.2.2.2 Audio Pins
VSUP5 – Supply Voltage 5.0V
This pin is main supply for the SIF and the digital audio
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