Hitachi CMT2195 Service Manual page 5

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CMT2195
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PIN DESCRIPTION FOR IC201 - TDA 8362
DESCRIPTION
Video identification output - N.C.
ound IF in plus volume control
xternal audio input -
Video output
Decoupling digital supply
Positive supply (8V)
QoQ
Ground
Decoupling filter tuning
Internal CVBS input
14
Peaking control input
15
External CVBS input
Chroma + A/V switch input
of
Gu]
NO!
Denved from external video source and supplied to the synchronization, laminance and
chrommance processing (level ~ 1Vpk-pk} by selection,
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DC voltage contro! the selection of internal/external CVBS (Pin 13 or 15) and audio,
.e, <0,5V: Internal signals
>7.5V; External signals
Gah
Ga]
Gy
uy)
ta]
Gy]
Gal
Go No}
17
Brightness control input
B-output
G-output
20
R-output
RGBinsertion and blanking input
2e
Rinput for insertion
23
Ginput for insertion
Bnput for insertion
Contrast contro! input
Saturation control input
Hue control input
Ur
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nee ae anna a nanainininnemneenssanemaemnneeeeanesnemmmemmmntenes
Color decoder selection between NTSC or PAL/SECAM,
1e@, O~5V : NTSC decoder actvated
>6V
: PAL/SECAM decoder applied
28
B-Y input signal
29
R-Y Input signal
R-Y output signal
B-Y output sigrial
SECAM Reference/Communication
Loop filter burst phase detector
34
3.58 MHz X-al connection
4 43 MHz Xtal connection
.
36
Start horizontal oscillator
Start supply pin. if the start voltage is below 5.8V, the horizontal output will be disabled.
(Normal — 7.2V~8.8V)
Horizontal output
Flyback input/sandcastle -output
th-2 loop filter
)-1 loop filter
Vertical feedback input
Generates a linear sawtooth output for the vertical output stage.
_ Sn
RD
ee
.
.
This pin is the current output of the vertical preamplifier and drives the vertical deflection stage.
The amplifier has a feedback output, Pin 41, in order to sense the current in the vertical DY.
Vertical ramp generator
Vertical drive output
42
P= Ga
AFC output
IF input
iF anput
Tuner AGC output
AGC decoupling capacitor
IF input from Tuner and Saw Filter.
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Voltage to change the Tuner gian when RF input signal amplitude becomes too strong,
Tuner take-over adjustment
Audio output
Decoupling sound demodulator
Decoupling bandgap supply
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PIN DESCRIPTION FOR 1C1101 ~ M37210M4-655SP/657SP
DESCRIPTION
2
sri
This is the horizontal synchronous signal input pin for On-screen display
This is the vertical synchronous signal input pin for On-screen display
Output of the different DC levels to control each function
e.g. COLOR UP/DOWN, VOLUME UP/DOWN etc ...
4
| Output |
Output
HsyNc
Vsync
BRIGHT
OST
No>
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2
= —
CoLor
SHARP
<= =}
+
+
i
Output
utput
Input
Return of front control matrix
No connection
REB,
/
— o
t
12
Output
In/Out
Output
Input
Input
4,
Memory IC clock signal output
Memory IC data IN/OUT
Tuning control voltage to tuner
AFS voltage input. After A/D conversion, this pin also serve to detect the present of RF signal
Remote con. serial data input from R/C receiving unit CP1201
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UliTU
Ss
Coal
Reed
Cased
fe
Or}
Ont
{Go
20
> KS
Cota
TuNinNG VOLTAGE
: ~
~~
18
50/60 Hz lpent
19
N.C.
Seliection of "TV" or "Video In" signal. H:TV L:Video In
Standby
ON
VHFL
VHFH
UHF
TV/Vineo
In/Out
Bano 1
Output
S57
:
:
.
7
Output
BAND 2
L
H
H
H
[
NVss
GND OV |
Input
4 MHz Clock In
Output
4 MHz Clock Out
Vec
|
+5V Power supply +10% Tolerance,
28
OSC 2
Display oscillator frequency output
29
OCS 1
Output
Display oscillator frequency input
Input
Resets (C1011 initiated by Band 1 and Band 2 (Pins 21, 22)
RESET
Resets when power is "ON"
Return of Front contro! matrix
21
a
23
RO
><] |
2 =
S
Ro
Oo
= —
DNOPROT
No I}
OD]
cn
;
|
w
wn
w oS
Input
Input
Input
Input
Input
In/out
Output
Color identification of SECAM, NTSC or PAL
A/D terminal served to detect the present of Hsync signal
Shuts down power circuit
EEPROM chip select
Output for front panel control matrix to control vol., programme ..,
Cotor Ident
Hsync IDENT
PROTECT
EEP-CS
Scan 3
33
34
35
36
af
Output
39
"High" when 4.5MHz sound detected
High: "HITACHI" display appears when no signal received
DISPLAY
50/60 Hz
Output
Ident by pin 18 and controls output from this pin,
Control 0/P
No connection
No connection
43
44
SCL.
a be =
Output
45
In/Out
Alarm output
L= OFF
Alam = annar
50% Duty cycle
46
\/M
In/Out
Selects the sound system
4S HMz_5.5MHz
6.0 MHz
6.5 MHz
UM
A
H
L
L
B, G/D, K
BGD, K
H
L
H
L
bent
VO
el
ee
ee ee
a
On-Screen-Display blanking output
Blue output for On-ScreenDisplay
Green output for On-Screen-Display
Output
Red output for On-Screen-Display
47
50
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CMT2195
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