Grundig Chassis D5, Service Manual

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Chassis D5 GRUNDIG Service
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CXA 2040AQ I2C Bus-Compatible Video Switch
The CXA2040AQ is an I2C bus-compatible 5-input, 3-output video
switch for TVs.
Features
• Serial data control via I2C bus
• 5 composite video input systems
• 2 Y/C (S terminal) input systems
• 3 composite video output systems
• 1 Y/C (S terminal) output system
• Input can be selected independently for each output system.
• SYNC_ID function for CV1 system input
• Built-in 6dB amplifier for CVOUT2 system output
• Built-in Y/C MIX circuit
• Slave address can be changed (90H/92H).
• High impedance maintained by I2C bus line (SDA, SCL) even
when power is OFF.
MSP 34x0G Multistandard Sound Processor Family
The MSP 3410G family of single-chip Multistandard Sound Pro-
cessors 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. This
new generation of TV sound processing ICs now includes versions
for processing the multichannel television sound (MTS) signal con-
forming to the standard recommended by the Broadcast Television
Systems Committee (BTSC). The DBX noise reduction, or alternati-
vely, Micronas Noise Reduction (MNR) is performed.
Other processed standards are the Japanese FM-FM multiplex
standard (EIA-J) and the FM Stereo Radio standard.
The MSP 3410G has optimum stereo performance without any ad-
justments.
The MSP 3410G has built-in automatic functions:
The IC is able to detect the actual sound standard automatically
(Automatic Standard Detection). Furthermore, pilot levels and iden-
tification signals can be evaluated internally with subsequent swit-
ching between mono/ stereo/bilingual; no I2C interaction is ne-
cessary (Automatic Sound Selection).
The MSP 3410G can handle very high FM deviations even in con-
junction with NICAM processing.
TDA7266S 5+5w Dual Bridge Amplifier
The TDA7266S is a dual bridge amplifier specially designed for TV
and Portable Radio applications.
• Wide supply voltage range (3-18V)
• Minimum external components
– no swr capacitor
– no bootstrap
– no boucherot cells
– internally fıxed gaın
• Stand-by & mute functıons
• Short cırcuıt protection
• Thermal overload protection
TDA 7442 Digitally Controlled Audio Processor
The TDA7442/42D is volume tone (bass and treble) balance (Left/
Right) processors for quality audio applications in TV and Hi-Fi sy-
stems. It reproduces surround sound by using a programmable
phase shifter. Control of all the functions is accomplished by serial
bus. The AC signal setting is obtained by resistor networks and
switches combined with operational amplifiers. Thanks to the BIPO-
LAR/CMOS Technology used, Low Distortion, Low Noise and DC
stepping are obtained.
• 4 stereo inputs
• Input attenuation control in 0.5dB step
• Treble and bass control
• Two surround mode available with 4 selectable responses:
- music
- simulated stereo
• Two speaker attenuators:
- 2 independent speaker controls
• In 1dB steps for balance facility
- independent mute function
• All functions programmable via serial Bus
• 2 monitor output (only for TDA7442)