Zanussi 22ZT907, Service Manual

Page: 13 / 64

INTEGRATED CIRCUITS
mounted on chassis and p.c.boards
1
2
101
102
103
201
TDA 4290
202
CI 261
CI 262
301
351
401
TDA 2151
TDA 2140
TDA 2541
Electronic functions
IF amplifier. Carrier generator and
synchronous detector. Video preamplifier.
White peaks inverter stage AGC AFC.
TBA 120 U
Amplifier/limiter. Coincidence detector.
Reference frequency generator for
detection. Low frequency audio signal
output with insertion of volume
adjustment. Low frequency audio signal
output without volume adjustment.
Luminance/chrominance signal processing.
Brightness,
contrast and controls.
Beam current limiter.
Colour subcarrier regeneration. PAL
switching. Identifier. Killer. AFC and
automatic phase control. ACC. Burst.
TDA
2161
R-Y/B-Y demodulators. G-Y matrix.
Luminance matrix.
Continuous path control adjustment of
treble, bass and volume.
TDA 2030
TDD 1618
MC
14013
Audio amplifier.
stabilizer.
Switch-ON reset. TV start signal
clamp pulse.
L 200 v
TDA 1170
stabilizer.
Square-wave signal generation. Conversion
of the square-wave signal into a
saw-tooth signal. Saw-tooth signal
amplification. Voltage stabilization
of all internal circuits.
TDA 2593
Synchro. separator. Phase comparator.
15625 Hz oscillator. Phase shift.
Generator of the driving pulse for the
line output amplifier. Sand-castle
generator.