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Saturday, March 5, 2011

CGE M3788 TVC 15" CHASSIS F860 UNITS VIEW.































IF AMPL + DEMOD + SOUND UNIT:F860Z21 with TDA2541


TELETEXT UNIT:F960Z121 WITH SDA5241 + SDA5231 + TC5565APL-12






TDA2541 IF AMPLIFIER WITH DEMODULATOR AND AFC

DESCRIPTION
The TDA2540 and 2541 are IF amplifier and A.M.
demodulator circuits for colour and black and white
television receivers using PNP or NPN tuners. They
are intended for reception of negative or positive
modulation CCIR standard.
They incorporate the following functions : .Gain controlled amplifier .Synchronous demodulator .White spot inverter .Video preamplifier with noise protection .Switchable AFC .AGC with noise gating .Tuner AGC output (NPN tuner for 2540)-(PNP
tuner for 2541) .VCR switch for video output inhibition (VCR
play back).




.SUPPLYVOLTAGE : 12V TYP
.SUPPLYCURRENT : 50mATYP
.I.F. INPUT VOLTAGE SENSITIVITY AT
F = 38.9MHz : 85mVRMS TYP
.VIDEO OUTPUT VOLTAGE (white at 10% of
top synchro) : 2.7VPP TYP
.I.F. VOLTAGE GAIN CONTROL RANGE :
64dB TYP .SIGNAL TO NOISE RATIO AT VI = 10mV :
58dB TYP
.A.F.C. OUTPUT VOLTAGE SWING FOR
Df = 100kHz : 10V TYP
at

2 comments:

  1. é isso mesmoSeptember 7, 2012 at 6:24 PM

    Hi all!
    I am looking for this CGE M3788 TVC 15" CHASSIS F860 schematics.
    It has sinc. problems only with SCART video in. Thanks in advance.
    Joao Pedro
    Portugal

    ReplyDelete
  2. FRANK September 8, 2012 at 2:26 PM

    Probabily The source of the signal is the problem, Inclusive cable, not the tv.

    Check it before all.

    Ask Google for the schematic diagram, you will find it.

    FRANK.

    ReplyDelete

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