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PT- 7 1 Chassis Service Manual
Microcontroller
Unit
I
CTV 352 S(for stereo) and CTV 322(for mono) are a voltage synthesis tuning system with on screen display
OSD of all relevant control function. Analog picture settings are controlled by 4 on-chip digital to analog con-
verters. Sound volume can be controlled by the fifth on-chip digital to analog converter in mono only system.
Full sound
(
volume, bass, treble, balance
)
in German Stereo and Nicam configuration
and Teletext can be
controlled via the l2C bus using a sound processor and teletext decoder. This controllers can control up to two
start plugs.
PINNING
1
Tuning voltage control output
PIN VOLTAGE
:
5v
- ov
2
Volume control output
3
Brightness control output
4
Color control outout
5
Contrast or hue control output
6
Tone, balance or hue control output
7
Band-switch O-output
: 0 -
5v
: -
. _
8
Band-switch l-output
9
Analogue AFC sense input
. _
:
2-4V
10
Dual/Non Dual language sound input
: -
11
VTR time constant control output
12
Ext./int. audio/video source control output
i
5, (TV)
-
OV (AV)
13
Keyboard scan line input/output
. _
14
Keyboard scan line input/output
. _
15
Keyboard scan line input/output
: -
16
Keyboard scan line input/output
. _
17
Keyboard scan fine input/output
. _
18
Keyboard scan line input/output
:-
19
Keyboard scan line input/output
- _
20
System mode'strobe output
:
5v
21
Ground supply input
22
OSD red output
23
OSD areen output
:-
:
4.5vpp
:
4.5Vpp
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