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__oMT2195 |
1 POWER switch
2 Remote contro! receiver
CONTROLS
1
2
3
3 Power indicator
A Programme up/down
REMOTE
CONTROL
UNIT
5 Volume up/down
5 TV/VIDEO selection
10
ll
12
13/14
7 AV in/out terminals
8 Aerial input terminal
Power ON/OFF
Input select
Programme selector
Timer
Menu
7 | Normalize
0 | Programme up/down _|
Mute
1
ho
cates
ws
Jos
fo
CIRCUIT DESCRIPTION
Tuner
and |. F. Stages:
The tuner used on this chassis,
is powered by the +9V,
supply, and covers VHF, UHF and CATV Hyper Band. The
|. F. output from the tuner is applied to amplifier Q201 then
input to CP201 or CP202 as shown in Table 1.
Sound |. FE Stages :
The composite signal output from pin 7 of C201 is input to sound
filters, MF401, MF402, MF403 and MF404, and selected with the
mode shown in Table 1 at IC451 after being output from the
filter. The selected signal is then input to pin 5 of 1201
via 0422,
Table 1
Sound filter
MF402 (5.5MHz)
MF403 (6.0MHz)
MF404 (6.5MHz)
MF401 (4.5MHz)
MF503
Vision |. F Stages:
The IF. signal from CP201 and CP202 is input to pins 45 and 46
of IC201. These pins supply an internal amplifier consisting of
three stages whose gain is controlled by the AGC circuit. The
response speed of this internal AGC stage is determined by the
external components connected to pin 48,
The output from the {.F. ampiifier is then fed to the video
detector circuitry.
The picture carrier is limited and phase
shifted by the tank circuitry of L202 etc,, connected between
pins 2 and 3 of the IC. This produces a reference frequency
which is utilised for synchronous video detect ion.
An RF AGC voltage is made available at pin 48 of IC201, the
starting level of which is determined by the voltage applied
to pin 49, which in turn is fixed by the setting of VR202,
This AGC voltage is then fed to the tuner via R208 to control
its gain accordingly.
The composite video finally emerges at pin 7 of IC201.
Sound trap
MF501/
MF502
| -CMT2195__
Luminance Circuitry :
Chrominance Circuitry :
Deflection Circuits :
The deflection circuitry of 10201 contains a sync, separator
stage, horizontal
oscillator and output stages, a vertical
count-down and output stage.
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