Lcd Display - Philips LC4.2E Service Manual

Circuit Descriptions, Abbreviation List, and IC Data Sheets
Figure 9-5 Micro Controller block diagram
9.10.3 Basic Specification
The Micro Controller operates at the following supply voltages:
•
+3.3 V_dc at pins 4, 88, 94, and 109.
•
+1.8 V_dc at pins 93, 96, and 117.
•
I2C pull up supply: +3.3V_dc.
9.10.4 Pin Configuration and Functionality
The ports of the Micro Controller can be configured as follows:
•
A normal input port.
•
An input ADC port.
•
An output Open Drain port.
•
An output Push-Pull port.
•
An output PWM port.
•
Input/Output Port
The following table shows the ports used for the L04 control:
Table 9-2 Micro Controller ports overview
Pin Name
97 INT0/ P0.5
98 P1.0/ INT1
99 P1.1/ T0
102 P0.4/ I2SWS
103 P0.3/ I2SCLK Lip Sync
104 P0.2/ I2SDO2 NVM_WP
105 P0.1/ I2SDO1 Lip Sync
106 P0.0/ I2SDI/O Lip Sync
107 P1.3/ T1
108 P1.6/ SCL
109 P1.7/ SDA
111 P2.0/ TPWM
112 P2.1/ PWM0
113 P2.2/ PWM1
114 P2.3/ PWM2
115 P3.0/ ADC0
116 P3.1/ ADC1
119 P3.2/ ADC2
120 P3.3/ ADC3
122 P2.4/ PWM3
123 P2.5/ PWM4
126 P1.2/ INT2
127 P1.4/ RX
128 P1.5/ TX
The description of each functional pin is explained below:
E_14490_062.eps
Description Configuration
IR INT0
TV_IRQ INT2
TV_SC_COM P1.1
EXT_MUTE P0.4
I2SCLK
P0.2
I2SDO1
I2SDI/O
PC-TV_LED P1.3
SCL SCL
SDA SDA
SOUND_ENABLE P2.0
(for future use) -
(for future use) -
SEL_IF P2.3
Light Sensor - SDM ADC0
STATUS_1 ADC1
STATUS_2 ADC2
KEYBOARD ADC3
STANDBY P2.4
(for future use) -
(for future use) -
HERC_RESET -
POWER_DOWN P1.5
•
LED. This signal is used as an indication for the Standby,
Remote and Error Indicator. Region diversity:
–
During protection mode, the LED blinks and the set is
in standby mode.
–
During error conditions it blinks at a predefined rate.
–
After receiving a valid RC-5 or local keyboard
command it flashes once.
–
For sets with error message indication, the LED blinks
when message is active and the set is in standby
mode.
•
SCL. This is the clock wire of the two-wire single master bi-
directional I2C bus.
•
SDA. This is the data wire of the two-wire single master bi-
directional I2C bus.
•
STANDBY. The Hercules generates this signal. This can
enable the power supply in normal operation and disable it
during Standby. It is of logic "high" (3.3 V) under normal
020604
operation and "low" (0 V) during Standby.
•
IR. This input pin is connected to an RC5 remote control
receiver.
•
SEL-IF. This is an output pin to switch the Video SAW filter
between M system and other systems.
–
0: NTSC M (default)
–
1: PAL B/G, DK, I, L
•
NVM_WP. The global protection line is used to enable and
disable write protection to the NVM. When write to the
NVM is required, pin 7 of the NVM must be pulled to logic
'0' first (via Write_Protect of the micro-controller pin) before
a write is performed. Otherwise pin 7 of NVM must always
be at logic "1"
–
0: Disabled
–
1: Enabled (default)
•
SOUND_ENABLE. This pin is use to MUTE the audio
amplifier. It is configured as push pull.
•
STATUS_1. This signal is used to read the status of the
SCART 1 input.
•
STATUS_2. This signal is used to read the status of the
SCART 2 input.
•
HERC_RESET. This pin is use to switch the +1.8V supply.
•
POWER_DOWN. The power supply generates this signal.
Logic "high" (3.3 V) under normal operation of the TV and
goes "low" (0 V) when the Mains input voltage supply goes
below 70 V_ac.
•
Keyboard. Following are the Keyboard functions and the
step values (8 bit) for it.
Table 9-3 Local keyboard values
Function
NAFTA Standby
Ch +
Exit Factory (Ch- and Vol-)
Ch -
Menu (Vol - and Vol +)
Vol -
DVD Eject
Vol +
•
TV_IRQ. This signal is the interrupt from the Scaler IC.
•
TV_SC_COM. This signal is used for the communication
with the Scaler IC.
•
EXT_MUTE. This signal is used to reduce the Switch-off
plop.

9.11 LCD Display

9.11.1 Specifications
Panel model
LC4.2E AA 9.
Voltage Step values
(V_dc) (8 bit)
0 0 - 6
0.43 7 - 33
0.69 34 - 53
0.93 54 - 73
1.19 74 - 96
1.49 97 - 121
1.8 122 - 147
2.12 148 - 169
: LC171W03-A4K3
(17")
EN 71