Philips 32PF9968/10 Service Manual page 80

EN 80 9. LC4.8L LA
the region. AP China can have a Multi-System and I/DK
version. For India, it might only be BG standard.
9.8.2 Functionality
The features available in the Hercules are as follows:
• Treble and Bass Control.
• Surround Sound Effect that includes:
– Incredible Stereo.
– Incredible Mono.
– 3D Sound (not for AV Stereo).
– TruSurround (not for AV Stereo).
– Virtual Dolby Surround, VDS422 (not for AV Stereo).
– Virtual Dolby Surround, VDS423 (not for AV Stereo).
– Dolby Pro-Logic (not for AV Stereo).
• Bass Feature that includes:
– Dynamic Ultra-Bass.
– Dynamic Bass Enhancement.
– BBE (not for AV Stereo).
• Auto-Volume Leveler.
• 5 Band Equalizer.
• Loudness Control.
All the features stated are available for the Full Stereo versions
and limited features for the AV Stereo
9.8.3 Audio Amplifier
The audio amplifier part is very straightforward. It uses two
integrated TDA8931T power amplifiers for the L and R
channels; each amplifier IC is able to deliver a maximum output
of 20 W continuously in a 4-6 ohm speaker without needing
RMS
a heatsink.
The operating supply for the amplifier may range from 12 V to
32 V; in the LC04x TV set, depending on the model, supply
voltages of 18 V (for the 5 W / 8 ohm version) or 24 V (for the
15 W / 4 ohm version) are used.
Muting is done via the SOUND_ENABLE line connected to pins
7 of both amplifier-ICs, which comes from the Hercules.
9.8.4 Audio: Lip Sync
No Lip Sync adjustments are necessary in this model.
9.9 Control
9.9.1 Hercules
The System Board has two main micro-controllers on board.
These are:
• On-chip x86 micro-controller (OCM) from Genesis LCD TV/
Monitor Controller.
• On-chip 80C51 micro-controller from Philips
Semiconductor UOCIII (Hercules) series.
Each micro-controller has it own I
internal devices.
The Hercules is integrated with the Video and Audio Processor.
For dynamic data storage, such as SMART PICTURE and
SMART SOUND settings, an external NVM IC is being used.
Another feature includes an optional Teletext/Closed Caption
decoder with the possibility of different page storage depending
on the Hercules type number.
9.9.2 Block Diagram
The block diagram of the Micro Controller application is shown
below.
Circuit Descriptions, Abbreviation List, and IC Data Sheets
2
C bus which hosts its own
Tuner
ComPair
Sound
NVM
Amp
NVM_WP
Sound_Enable
HREC
127 111 104
RST P1.4 P2.0 P0.2
Sel IF/
114
P2.3
SDM
SDA 109
116
SCL 108
ADC1
Status1
115
HERCULES
INT1 98
ADC0
Light
Sense
P1.1 99
ADC3 120
123
P2.5
126
97 102 122 128
INT2
INT0 P0.4 P2.4 P1.5
P50_LINE_ITV_IR_SW
RC
MUX
Standby
POWER
EXT_MUTE
TV_IR DOWN
Figure 9-5 Micro Controller block diagram
9.9.3 Basic Specification
The Micro Controller operates at the following supply voltages:
• +3.3 V at pins 4, 88, 94, and 109.
DC
• +1.8 V at pins 93, 96, and 117.
DC
2
• I C pull up supply: +3.3V
9.9.4 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 LC04 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
IIC BUS1
IIC BUS 2
GPROBE for Debug
or ComPair(Scaler)
NVM
1407
1406
1405
NVM_WP
93 83 72
92 71 194 193 187
NVRAM GPIO2
NVRAM 85
_SDA
_SCL (GPIO4)
88
SDA
(GPIO5)
78 DDC_SDA_VGA
89
SCL (GPIO6)
77 DDC_SCL_VGA
68
TV_IRQ
(PBIAS)
82 GPIO1 SCALER
TV_SC_COM
67
81 GPIO0
(PPWR)
99
Keyboard
(PWM1)
POWER_DOWN
98 BACK_LIGHT_ADJ1
90 GPIO7
(GPIO11/
PWM0)
ROM_DATA0-7
111
103 106 107 108
GPIO23
5 6 7 ROM_ADD0-17
+3V3STBY
Flash ROM
HIGH or
LOW
level input
.
DC
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
+3V3STBY
PC_DET
SD_PCHD_SEL
PC_HD_SEL
LAMP_ON_OFF
PANEL_PWR_CTL
HD_FILTER
E_14490_062.eps
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