The chassis is capable of operation in PAL, SECAM, NTSC (playback) colour standards and multiple transmission standards as B/G, D/K, I/I’, and L/L´.
Sound system output is supplying 2x3W (10%THD) speakers. The chassis is equipped with two full SCART’s, one back-AV, one SVHS, one D-Sub 15 (PC) input, one PC stereo audio input and one line out (left and right) and one HP Outputs.
As
the thickness of the TV set has a limit, a horizontal mounted tuner is used in
the product, which is suitable for CCIR systems B/G, H, L, L´, I/I´, and D/K.
The tuning is available through the digitally controlled I2C bus (PLL). Below
you will find info on the Tuner in use.
General description of UV1316:
The
UV1316 tuner belongs to the UV 1300 family of tuners, which are designed to
meet a wide range of applications. It is a combined VHF, UHF tuner suitable for
CCIR systems B/G, H, L, L’, I and I’. The low IF output impedance has been
designed for direct drive of a wide variety of SAW filters with sufficient suppression
of triple transient.
IF PART (TDA988X)
The
TDA9885 is an alignment-free single standard (without positive modulation)
vision and sound IF signal PLL.
The
TDA9886 is an alignment-free multi standard (PAL, SECAM and NTSC) vision and
sound IF signal PLL demodulator for positive and negative modulation including
sound AM and FM processing.
Both
devices can be used for TV, VTR, PC and set-top box applications.
MULTI STANDARD SOUND PROCESSOR
The
MSP34x0G family of single-chip Multistandard Sound Processors covers the sound
processing of all analog TV-Standards worldwide, as well as the NICAM digital
sound standards. The full TV sound processing, starting with analog sound IF
signal-in, down to processed analogue AF-out, is performed on a single chip.
These
TV sound processing ICs include versions for processing the multichannel
television sound (MTS) signal conforming to the standard recommended by the
Broadcast Television Systems Committee (BTSC).
The
DBX noise reduction, or alternatively, Micronas Noise Reduction (MNR) is performed
alignment free.
Other
processed standards are the Japanese FM-FM multiplex standard (EIA-J) and the
FM Stereo Radio standard.
Current
ICs have to perform adjustment procedures in order to achieve good stereo
separation for BTSC and EIA-J. The MSP 34x1G has optimum stereo performance
without any adjustments.
AUDIO AMPLIFIER STAGE WITH TPA3003D2
The
TPA3003D2 is a 3-W (per channel) efficient, Class-D audio amplifier for driving
bridged-tied stereo speakers. The TPA3003D2 can drive stereo speakers as low as
8 Ω. The high efficiency of the TPA3003D2 eliminates the need for external
heatsinks when playing music. Stereo speaker volume is controlled with a dc voltage
applied to the volume control terminal offering a range of gain from –40 dB to
36 dB.
POWER
The
LM2576 series of regulators are monolithic integrated circuits ideally suited
for easy and convenient design of a step–down switching regulator (buck
converter). All circuits of this series are capable of driving a 3.0A load with
excellent line and load regulation. Two different versions (one having a fixed
output voltage of 3.3 V, and one with 5.0 V) of this IC are used in the
regulator board.
SERIAL ACCESS CMOS 16K (2048*8) EEPROM ST24C16
The
ST24C16 is a 16Kbit electrically erasable programmable memory (EEPROM),
organised as 8 blocks of 256*8 bits. The memory is compatible with the I²C
standard, two wire serial interface, which uses a bidirectional data bus and
serial clock. The memory carries a built-in 4 bit, unique device identification
code (1010) corresponding to the I²C bus definition. This is used together with
1 chip enable input (E) so that up to 2*8K devices may be attached to the I²C
bus and selected individually.
LM2576
The
LM2576 series of regulators are monolithic integrated circuits ideally suited
for easy and convenient design of a step–down switching regulator (buck
converter). All circuits of this series are capable of driving a 3.0 A load
with excellent line and load regulation.
These
devices are available in fixed output voltages of 3.3 V, 5.0 V, 12 V, 15 V, and
an adjustable output version. These regulators were designed to minimize the
number of external components to simplify the power supply design. Standard
series of inductors optimized for use with the LM2576 are offered by several
different inductor manufacturers.
Since
the LM2576 converter is a switch–mode power supply, its efficiency is
significantly higher in comparison with popular three–terminal linear
regulators, especially with higher input voltages. In many cases, the power
dissipated is so low that no heatsink is required or its size could be reduced
dramatically.
A
standard series of inductors optimized for use with the LM2576 are available
from several different manufacturers. This feature greatly simplifies the design
of switch–mode power supplies.
The
LM2576 features include a guaranteed ±4% tolerance on output voltage within
specified input voltages and output load conditions, and ±10% on the oscillator
frequency (±2% over 0°C to 125°C). External shutdown is included, featuring 80
mA (typical) standby current. The output switch includes cycle–by–cycle current
limiting, as well as thermal shutdown for full protection under fault
conditions.
LM317T
The
LM317T is an adjustable 3 terminal positive voltage regulator capable of
supplying in excess of 1.5 amps over an output range of 1.25 to 37 volts. This
voltage regulator is exceptionally easy to use and requires only two external
resistors to set the output voltage. Further, it employs internal current
limiting, thermal shutdown and safe area compensation, making it essentially
blow–out proof. The LM317 serves a wide variety of applications including
local, on card regulation. This device can also be used to make a programmable
output regulator, or by connecting a fixed resistor between the adjustment and
output, the LM317 can be used as a precision current regulator.
ST24LC21
The
ST24LC21 is a 1K bit electrically erasable programmable memory (EEPROM),
organized by 8 bits. This device can operate in two modes: Transmit Only mode
and I2C bidirectional mode. When powered, the device is in Transmit Only mode
with EEPROM data clocked out from the rising edge of the signal applied on
VCLK. The device will switch to the I2C bidirectional mode upon the falling
edge of the signal applied on SCL pin. The ST24LC21 can not switch from the I2C
bidirectional mode to the Transmit Only mode (except when the power supply is
removed). The device operates with a power supply value as low as 2.5V. Both
Plastic Dual-in-Line and Plastic Small Outline packages are available.
TEA6415
The
main function of the IC is to switch 8 video input sources on 6 outputs. Each
output can be switched on only one of each input. On each input an alignment of
the lowest level of the signal is made (bottom of synch. top for CVBS or black
level for RGB signals). Each nominal gain between any input and output is 6.5dB.
For D2MAC or Chroma signal the alignment is switched off by forcing, with an
external resistor bridge, 5 VDC on the input. Each input can be used as a
normal input or as a MAC or Chroma input (with external resistor bridge). All
the switching possibilities are changed through the BUS. Driving 75Ω load needs
an external transistor. It is possible to have the same input connected to
several outputs. The starting configuration upon power on (power supply: 0 to
10V) is undetermined. In this case, 6 words of 16 bits are necessary to
determine one configuration. In other case, 1 word of 16 bits is necessary to determine
one configuration.
VPC3230D
The
VPC 323xD is a high-quality, single-chip video front-end, which is targeted for
4:3 and 16:9, 50/60-Hz and 100/120 Hz TV sets. It can be combined with other
members of the DIGIT3000 IC family (such as DDP 331x) and/or it can be used
with 3rd-party products.
SDA55XX
(SDAThe SDA55XX is a single chip teletext decoder for decoding World System
Teletext data as well as Video Programming System (VPS), Program Delivery
Control (PDC), and Wide Screen Signalling (WSS) data used for PAL plus
transmissions (Line 23). The device also supports Closed caption acquisition
and decoding. The device provides an integrated general-purpose, fully
8051-compatible Microcontroller with television specific hardware features.
Microcontroller has been enhanced to provide powerful features such as memory
banking, data pointers, and additional interrupts etc. The on-chip display unit
for displaying Level 1.5 teletext data can also be used for customer defined on
screen displays. Internal XRAM consists of up to16 Kbytes. Device has an
internal ROM of up to 128 KBytes. ROMless versions can access up to 1 MByte of
external RAM and ROM. The SDA 55XX supports a wide range of standards including
PAL, NTSC and contains a digital slicer for VPS, WSS, PDC, TTX and Closed
Caption, an accelerating acquisition hardware module, a display generator for
Level 1.5 TTX data and powerful On screen Display capabilities based on
parallel attributes, and Pixel oriented characters (DRCS). The 8-bit Microcontroller runs at 360 ns.
cycle time (min.). Controller with dedicated hardware does most of the internal
TTX acquisition processing, transfers data to/from external memory interface
and receives/transmits data via I2C-firmware user-interface. The slicer
combined with dedicated hardware stores TTX data in a VBI buffer of 1 Kilobyte.
The Microcontroller firmware performs all the acquisition tasks (hamming and
parity-checks, page search and evaluation of header control bits) once per
field. Additionally, the firmware can provide high-end Teletext features like
Packet-26-handling, FLOF, TOP and list-pages. The interface to user software is
optimized for minimal overhead. SDA 55XX is realized in 0.25 micron technology
with 2.5 V supply voltage and 3.3 V I/O (TTL compatible). The software and
hardware development environment (TEAM) is available to simplify and speed up
the development of the software and On Screen Display. TEAM stands for TVT
Expert Application Maker. It improves the TV controller software quality in
following aspects:
–
Shorter time to market
–
Re-usability
–
Target independent development
–
Verification and validation before targeting
–
General test concept
–
Graphical interface design requiring minimum programming and controller know
how.
–
Modular and open tool chain, configurable by customer.
TPA3003D2
The
TPA3003D2 is a 3-W (per channel) efficient, Class-D audio amplifier for driving
bridged-tied stereo speakers. The TPA3003D2 can drive stereo speakers as low as
8 Ω. The high efficiency of the TPA3003D2 eliminates the need for external
heatsinks when playing music. Stereo speaker volume is controlled with a dc voltage
applied to the volume control terminal offering a range of gain from –40 dB to
36 dB.
TDA9885/86
The
TDA9885 is an alignment-free single standard (without positive modulation)
vision and sound IF signal PLL.
The
TDA9886 is an alignment-free multistandard (PAL, SECAM and NTSC) vision and
sound IF signal PLL demodulator for positive and negative modulation including
sound AM and FM processing. Both devices
can be used for TV, VTR, PC and set-top box applications.
TDA1308
The
TDA1308 is an integrated class AB stereo headphone driver contained in an SO8
or a DIP8 plastic package. The device is fabricated in a 1 mm CMOS process and
has been primarily developed for portable digital audio applications
PI5V330
Pericom
Semiconductor’s PI5V series of mixed signal video circuits are produced in the
Company’s advanced CMOS low-power technology, achieving industry leading
performance.
The
PI5V330 is a true bidirectional Quad 2-channel multiplexer/demultiplexer that
is recommended for both RGB and composite video switching applications. The
VideoSwitch™ can be driven from a current output RAMDAC or voltage output
composite video source.
Low
ON-resistance and wide bandwidth make it ideal for video and other
applications. Also this device has exceptionally high current capability which
is far greater than most analog switches offered today. A single 5V supply is
all that is required for operation.
The
PI5V330 offers a high-performance, low-cost solution to switch between video
sources. The application section describes the PI5V330 replacing the HC4053
multiplier and buffer/amplifier.
GM6015
The
Genesis Microchip 6015RD1 LCD TV reference board is a complete display processor
for LCD, PDP and LCOS based televisions. The reference board demonstrates the
processing capabilities of the Genesis Microchip gm6015 television controller
IC. The gm6015 IC is a full-featured, dual-channel video processor with Genesis
industry leading Crystal Ciema PlusTM video scan conversion. The 6015RD1 board
inputs analog YPbPr/RGB, NTSC/PAL/SECAM CVBS/YC, UHF/VHF and outputs digital
RGB to an XGA LCD panel. A convenient on-screen display system provides easy
control of the board’s processing capabilities. The design kit is complete with
hardware and software. Software includes G-Probe debug software, GWizard
register calculator and G-TV application source code. The 6015RD1 is a related reference board that
outputs analog YpbPr/RGB.
AD9883A
The
AD9883A is a complete 8-bit, 140 MSPS monolithic analog interface optimized for
capturing RGB graphics signals from personal computers and workstations. Its
140 MSPS encode rate capability and full power analog bandwidth of 300 MHz
supports resolutions up to SXGA (1280 1024 at 75 Hz). The AD9883A includes a
140 MHz triple ADC with internal 1.25 V reference, a PLL, and programmable gain,
offset, and clamp control. The user provides only a 3.3 V power supply, analog
input, and Hsync and COAST signals. Three-state CMOS outputs may be powered
from 2.5 V to 3.3 V. The AD9883A’s
on-chip PLL generates a pixel clock from the Hsync input. Pixel clock output
frequencies range from 12 MHz to 140 MHz. PLL clock jitter is 500 ps p-p
typical at 140 MSPS. When the COAST signal is presented, the PLL maintains its
output frequency in the absence of Hsync. A sampling phase adjustment is
provided. Data, Hsync, and clock output phase relationships are maintained. The
AD9883A also offers full sync processing for composite sync and sync-on-green
applications.
A
clamp signal is generated internally or may be provided by the user through the
CLAMP input pin. This interface is fully programmable via a 2-wire serial
interface. Fabricated in an advanced
CMOS process, the AD9883A is provided in a space-saving 80-lead LQFP surface-mount
plastic package and is specified over the 0C to 70C temperature range.
•
140 MSPS Maximum Conversion Rate
•
300 MHz Analog Bandwidth
•
0.5 V to 1.0 V Analog Input Range
•
500 ps p-p PLL Clock Jitter at 110 MSPS
•
3.3 V Power Supply
•
Full Sync Processing
•
Sync Detect for “ Plugging ”
•
Midscale Clamping
•
Power-Down Mode
•
Low Power:500 mW Typical
•
4:2:2 Output Format Mode
MC141585
This
is a high performance HCMOS device designed to interface with a micro
controller unit to allow colored symbols or characters to be displayed onto a
LCD monitor. Because of the large number of fonts, 512 fonts including 496
standard fonts and 16 multi-color fonts, MOSD2-16 is suitable to be adopted for the
multi-language monitor application especially. It minimizes the MCU’s burden
through its built-in RAM. By storing a
full screen of data and control information, this device has a capability to
carry out ‘screenrefresh’ without any MCU supervision. Programmable hatch
pattern generator is added for individual pixel inspection.
Since
there is no clearance between characters, special graphics oriented characters
can be generated by combining two or more character blocks. The full OSD menu
is formed of 15 rows x 30 columns which can by freely positioned on anywhere of
the monitor screen by changing vertical or horizontal delay. Special functions such as character
background color, blinking, bordering or shadowing, four-level windows with
programmable size, row double height and double width, programmable vertical
height of character and row-to-row spacing, and full-screen erasing and
Fade-In/Fade-Out are also incorporated. There
are 8 color selections for any individual character display with row intensity
attribute and window intensity attribute to expand the color mixture on OSD
menu.
•
Totally 512 Fonts Including 496 Standard Fonts and 16 Multi-Color Fonts.
•
10x18 or 12x18 Font Matrix Selection
•
Maximum Pixel CLK of 80MHz
•
Maximum input resolution of 1580 dots/line (PIXin/HSYNC ratio)
•
Wide Operating Frequency: max. 150KHz for Monitor
•
Fully Programmable Character Array of 15 Rows by 30 Columns
•
8-Color Selection for Characters with Color Intensity Attribute on Each Row
•
7-Color Selection for Characters background
•
True 16-Color Selection for Windows
•
Shadowing on Windows with Programmable Shadow Width/Height/Color
•
Fancy Fade-In/Fade-Out Effects
•
Programmable Height of Character to Meet Multi-Sync Requirement
•
Row To Row Spacing Control to Avoid Expansion Distortion
•
Four Programmable Windows with Overlapping Capability
•
Character Bordering or Shadowing
•
Character/Symbol Blinking Function
•
Programmable Vertical and Horizontal Positioning for Display Center
•
M_BUS (IIC) Interface with Address $7A
MC34063
The
MC34063A Series is a monolithic control circuit containing the primary
functions required for DC–to–DC converters. These devices consist of an
internal temperature compensated reference, comparator, controlled duty cycle
oscillator with an active current limit circuit, driver and high current output
switch. This series was specifically
designed to be incorporated in Step–Down and Step–Up and Voltage–Inverting applications
with a minimum number of external components.
MSP34X0G
The
MSP 34x0G family of single-chip Multistandard Sound Processors covers the sound
processing of all analog TV-Standards worldwide, as well as the NICAM digital
sound standards. The full TV sound processing, starting with analog sound IF signal-in,
down to processed analog AF-out, is performed on a single chip. Figure shows a
simplified functional block diagram of the MSP 34x0G. This new generation of TV sound processing
ICs now includes versions for processing the multichannel television sound
(MTS) signal conforming to the standard recommended by the Broadcast Television
Systems Committee (BTSC). The DBX noise reduction, or alternatively, MICRONAS
Noise Reduction (MNR) is performed alignment free. Other processed standards
are the Japanese FM-FM multiplex standard (EIA-J) and the FM Stereo Radio
standard. Current ICs have to perform adjustment procedures in order to achieve
good stereo separation for BTSC and EIA-J. The MSP 34x0G has optimum stereo performance
without any adjustments.
All
MSP 34x0G versions are pin and software downward compatible to the MSP 34x0D.
The MSP 34x0G further simplifies controlling software. Standard selection
requires a single I²C transmission only.
The
MSP 34x0G has built-in automatic functions: The IC is able to detect the actual
sound standard automatically (Automatic Standard Detection). Furthermore, pilot
levels and identification signals can be evaluated internally with subsequent
switching between mono/stereo/bilingual; no I²C interaction is necessary (Automatic
Sound Selection)
DS90C385
The
DS90C385 transmitter converts 28 bits of LVCMOS/LVTTL data into four LVDS (Low
Voltage Differential Signaling) data streams. A phase-locked transmit clock is
transmitted in parallel with the data streams over a fifth LVDS link. Every
cycle of the transmit clock 28 bits of input data are sampled and transmitted.
At a transmit clock frequency of 85 MHz, 24 bits of RGB data and 3 bits of LCD
timing and control data (FPLINE, FPFRAME, DRDY) are transmitted at a rate of
595 Mbps per LVDS data channel. Using a
85 MHz clock, the data throughput is 297.5 Mbytes/sec. Also available is the
DS90C365 that converts 21 bits of LVCMOS/LVTTL data into three LVDS (Low
Voltage Differential Signaling) data streams. Both transmitters can be programmed
for Rising edge strobe or Falling edge strobe through a dedicated pin. A Rising
edge or Falling edge strobe transmitter will interoperate with a Falling edge
strobe Receiver (DS90CF386/DS90CF366) without any translation logic. The DS90C385 is also offered in a 64 ball,
0.8mm fine pitch ball grid array (FBGA) package which provides a 44% reduction
in PCB footprint compared to the TSSOP package. This chipset is an ideal means
to solve EMI and cable size problems associated with wide, high-speed TTL
interfaces.
NDS8947
These
P-Channel enhancement mode power field effect transistors are produced using
Fairchild's proprietary, high cell density, DMOS technology. This very high
density process is especially tailored to minimize on-state resistance and provide
superior switching performance. These devices are particularly suited for low
voltage applications such as notebook computer power management and other
battery powered circuits where fast switching, low in-line power loss, and
resistance to transients are needed. All
system, geometry and white balance alignments are performed in production
service mode.
Before starting
the production mode alignments, make sure that all manual adjustments are done
correctly. To start production mode alignments enter the main menu by pressing
“M” button and then press the digits 4, 7, 2 and 5 buttons respectively. The
following menu appears on the screen.
After
entering the Service menu, you can access its items by pressing “▲/▼” buttons.
In order to enter selected menu, use “◄/►” buttons. To exit the service menu
press “M” button.
Entire
service menu parameters of TFT TV are listed below.
ADJUST MENU SETTINGS
In
order to enter Adjust menu, move the cursor to Adjust… parameter by pressing
“▲/▼” buttons in Service Menu and press “◄/►” button. The following menu
appears on the screen.
There
are no items for adjustment in ADJUST menu for now.
OPTIONS MENU SETTINGS
In
order to enter Options menu, move the cursor to Options… parameter by pressing
“▲/▼” buttons in Service Menu and press “◄/►” button. The following menu
appears on the screen.
There
are 50 items in the OPTIONS menu, but 10 of them are seen when you first enter
the menu. Using “▲/▼” buttons remaining items can be seen.
Hue
On/Off
Enables
/ disables Hue option in Picture menu.
First
APS On/Off
If
ON, TV starts with APS menu at Start-up.
A.P.S
On/Off
Enables
/ disables Automatic Programming System.
Headphone
On/Off
Enables
/ disables the usage of the HP and HP related items in Sound menu.
Vsr
On/Off
Enables
/ disables Vsr.
DBE
On/Off
Enables
/ disables DBE.
Subwoofer
On/Off
Enables
/ disables Subwoofer.
Lineout
On/Off
Enables
/ disables Lineout.
Dolby
prologic On/Off
Enables
/ disables dolby prologic system.
Equalizer
On/Off
Enables
/ disables equalizer system.
BG
On/Off
Enables
/ disables BG Standard.
DK
On/Off
Enables
/ disables DK Standard.
I
On/Off
Enables
/ disables I Standard.
L
On/Off
Enables
/ disables L Standard.
L’
On/Off
Enables
/ disables L’ Standard.
AUS
On/Off
Enables
/ disables AUS Standard.
NZ
On/Off
Enables
/ disables NZ Standard.
NM
On/Off
Enables
/ disables NM Standard.
FM
Prs Avl On
Adjusts
the FM Prescaler value, when Automatic Volume Levelling is On.
Min.
Value: 0000 00000
Max.
Value: 00FF 00255
Nicam
Prs Avl On
Adjusts
the Nicam Prescaler value, when Automatic Volume Levelling is On.
Min.
Value: 0000 00000
Max.
Value: 00FF 00255
Scart
Prs Avl On
Adjusts
the Scart Prescaler value, when Automatic Volume Levelling is On.
Min.
Value: 0000 00000
Max.
Value: 00FF 00255
Scart
Volume Avl On
Adjusts
the Scart Volume value, when Automatic Volume Levelling is On.
Min.
Value: 0000 00000
Max.
Value: 00FF 00255
FM
Prs Avl Off
Adjusts
the FM Prescaler value, when Automatic Volume Levelling is Off.
Min.
Value: 0000 00000
Max.
Value: 00FF 00255
Nicam
Prs Avl Off
Adjusts
the Nicam Prescaler value, when Automatic Volume Levelling is Off.
Min.
Value: 0000 00000
Max.
Value: 00FF 00255
Scart
Prs Avl Off
Adjusts
the Scart Prescaler value, when Automatic Volume Levelling is Off.
Min.
Value: 0000 00000
Max.
Value: 00FF 00255
Scart
Volume Avl Off
Adjusts
the Scart Volume value, when Automatic Volume Levelling is Off.
Min.
Value: 0000 00000
Max.
Value: 00FF 00255
Hotel
VoD On/Off
Enables
/ disables Hotel Video-on-Demand feature.
X
Not
used
Avl
On/Off
Enables
/ disables Automatic Volume Levelling feature.
Top
TXT On/Off
Enables
/ disables TopText feature.
Fast
TXT On/Off
Enables
/ disables FastText feature.
TXT
Lang
Switches
between Teletext Language Groups.
Min.
Value: 0000 00000
Max.
Value: 0004 00004
IF
Freq
Adjusts
the IF Frequency value.
Min.
Value: 0000 00000
Max.
Value: 00FF 00255
Sound
On/Off
Enables
/ disables Sound.
Carrier
On/Off
Enables
/ disables sound Carrier feature.
RC_Options
On/Off
Enables
/ disables Remote control usage for Service menu.
AV-1
On/Off
Enables
/ disables AV-1.
AV-2
On/Off
Enables
/ disables AV-2.
S-VIDEO
On/Off
Enables
/ disables S-VIDEO.
AV-3
On/Off
Enables
/ disables AV-3.
PC
On/Off
Enables
/ disables PC.
MENU
On/Off
Enables
/ disables semi-transparent MENU.
MIX
Enables
/ disables teletext MIX mode.
Enable:
00000001
Disable:
00000000
HOTEL
MODE
Enables
/disables Hotel mode feature.
Enable:
00000001
Disable:
00000000
X
Not
used.
LDLY
Adjusts
the Luna / chroma DeLaY value.
Min.
Value: 0000 00000
Max.
Value: 0008 00008
AGC
Adjusts
the Automatic Gain Control value.
Min.
Value: 0000 00000
Max.
Value: 001F 00031
APS
WSS TEST MENU
In
order to enter Aps Wss Test menu, move the cursor to Aps Wss Test parameter by
pressing “▲/▼” buttons in Service Menu and press “◄/►” button. The following
menu appears on the screen.
There
are 7 items in the Aps Wss Test menu.
Programme
Search
VPS
Pdc
Format 1
Pdc
Format 2
Name
Wss
Schematic and block diagram