Hantarex MTC 9000 Owner's manual

N R X®
MTC 9000
open frame colour monitor
ADVANCE INFORMATION
COMPATIBILITY
The MTC 9000 has been created bearing in mind its numerous predecessor that are still in daily service, so that its
technical specification, its connexions, and its mechanical fixing points are all totally compatible with its antecedants,
thus making possible any variation of "crosses" with chassis, picture tubes and metal structures of the old MTC 900
and its derivatives.
':

INTRODUCTION
The principal new features of the MTC 9000 are as follows:
• All the controls which directly affect the display, horizontal frequency, vertical frequency, vertical amplitude, horizontal
amplitude, horizontal phase and vertical shift, are mounted on a small printed circuit board connected to the main
board by a connecting cable.
The monitor is supplied complete with a connecting cable 1.5 metres long, which permits the remote mounting of
the control board in the most convenient position for any particular application.
This "remote" feature is exclusive to the Hantarex MTC 9000.
•Addition of two connectors to each deflexion yoke with inverted connexions which, by choice of connector, permits
the easy inversion
of the image both vertically and horizontally for certain applications.
• Introduction of a novel circuit into the power supply, which, at an excessive drop in supply voltage, transforms the
stabilizer circuit into an anti-ripple circuit so permitting the use of the monitor outside the limits of stabilization.
•
Use of a special three-position switch in the video input circuit using close tolerance resitors, permitting the monitor
to be connected to input signals varying between 2 and 5 V p.p. without the introduction of tracking errors, which
would otherwise cause undesirable colour changes.
• Introduction of a new integrated circuit (TDA 1670) for vertical deflexion which permits the achievement of a short
vertical fly-back time (0.9 ms), and extends the use of the monitor where a short vertical blanking period is required .
• Introduction of a new integrated circuit in the horizontal oscillator synchronization circuit, which, among otherthings,
provides for
more accurate intervention of the x-ray protection circuit as required by the principal international safety
standars, such as F.D.A.,
the Federal Drug Administration.
TECHNICAL SPECIFICATION
TUBE SIZE
POWER REQUIRED
(excluding degaussing)
14", 16" and 20"
a.c. current*
Voltage
Frequency
r.m.s. Current
d.c.
current**
Voltage
Current
115-142 V a.c.
50-400 Hz
at lb 0 = 0.3 A
at lb 1 mA, = 0.7 A
155-200 V d.c.
at lb 0 = 0.3 A
at ib 1 mA, = 0. 7 A
* IMPORTANT: It is mandatory to use an isolating transformer with a capacity of at least 100 VA built to local safety standards.
Hantarex
declines all responsibility for eventual damage or injury caused by non observance of the above standards.
•* IMPORTANT: It is mandatory that the d.c. supply is floating, viz. with no · reference to earth and/or chassis (as is the case when using
Hantarex Power Supply
US 300)
POWER REQUIRED Voltage
220 V a.c . ±20%
50-60 Hz
(degaussing) Frequency
Current 4 A for
approx 0.2 s
EARTH SAFETY CONNEXION This connexion must be made to the metallic structure of the monitor which is not
separable from the electrical earth.
SYNC. AND DEFLEXION Sync. signals
Composite:
Amplitude 1.5 - 5 V p.p.
Polarity positive/negative
(switchable by switch on p.c.b.)
Timing conforms to t.v. standards± 10%
Separate:
Amplitude 1.5 - 5 V p.p.
Polarity positive/negative
(switchable simultaneously* ** by switch on p.c .b.)
H width 1-10 us
H Freq. 15-16 kHz
V width 80-1000 us
V Freq. 45-70 Hz
H Phase with standard European t.v. signals the H phase control
permits a displacement of the image (of nominal ampl .)
of±4 cm
V Linearity errors < 3%
H Linearity errors < 3%
H
Amplitude with standard European t.v. - signals the H ampl . permits
active video of 40-51 us .
V
Amplitude with standard European t.v. signals the V ampl. permits
active video of 16-19 ms .
· •* The polarity of the separate synchronizing pulses can be different (between H and V) only by modification of the circuit ,
substituting the switch by a bridge.
VIDEO SIGNAL
Type
Polarity
Amplitude
Bandwidth
Rise/Fall Time
RGB anal/TIL compat.
positive, white (high-level)
2-5 V p.p. (by use of input switch)
10 MHz at 40 V pp.
< 50 ns at 70 V p.p.
NOTE (a): The MTC 9000 is provided with both horizontal and vertical blanking signals, which permits the use of the monitor with
signals without blanking.
(b): The three RGB video amplifiers are d.c. coupled: there is thus no lower limit to the pass band.

PROTECTION CIRCUITS
The MTC 9000 is provided with the following protection circuits:
a) Protection
against excessive x-ray radiation.
This circuit is obligatory in many countries, and ensures that, with the worst cathode-ray tube and with a breakdown
in any part of the monitor, x-ray radiation will not exceed 0.5 mR/h. This is the international safety limit; however,
in practice, statistical measurements made on Hantarex production show that radiation never exceeds 0.1 mR/h.
b) Protection
of the Power Supply Unit.
This circuit protects the power unitfrom accidental short-circuit which could happen during installation or adjustment
of the monitor.
DEGAUSSING CIRCUIT:
Demagnetizing time 5 s
Time between successive
Demagnetizations <30 min.
NOTE:
• The monitor must be left switched-off between successive de-magnetizations.
• Normally the degaussing circuit operates automatically each time it is switched on; there is available , on request, an accessory
comprising a connector, a cable and a push-button, which provides for manual operation of the de-gaussing circuit .
BEAM CURRENT LIMITER:
FUSES:
NOTE:
Level of 1imit
F1
F2
1 mA approx .
2
AT (slow-blow)
3 AT (slow-blow)
Fuse F1 protects the whole monitor with the exception of the de-gaussing circuit . Fuse F2 protects the de-gaussing circuit only.
INSTALLATION
a) Connect to the power source as follows via connector CC:
Contacts 1-2 to an isolated source (see note) of alternating current at 128V, 50-400 Hz capable of supplying 100VA.
Alternatively one may use a direct current supply in the range 155-200. V, irrespective of polarity, subject to its being
isolated from chassis or earth, as, for example, one of the Hantarex series US 200/US 250/US 300. (see the note)
Contacts 3-4 to the mains supply at 220-240 V a.c., 50-60 Hz.
b) Connect to the signal source as follows via connector CA:
Contact 1 positive video signal BLUE (B)
Contact 2 positive video signal GREEN (G)
Contact 3 positive video signal RED (R)
Contact 4 common signal earth (GND)
Contact 5 vertical sync. (V SYNC)
(or no connexion if using composite sync.)
Contact 6 horizontal or composite sync (H SYNC)
Important
The use of an isolating transformer is obligatory; it needs a power capacity of at least 1 OOVA and to be constructed to meet
local safaty regulations. Hantarex accepts no responsability for any harm to persons or property resulting from non-observance
of
this warning.
) Important
It is obligatory that the direct current source shall be «floating», i.e. without any reference to earth or chassis, such as in the
case of the Hantarex
US 200/US 250/US 300.
c) Connect the Earth wire to the metal structure as prescribed by safety regulations.
d) Set the sync. selector switch (SW4) to adjust the monitor for the type of synchronizing signals available; SW4 functions
on both composite sync., and on separate sync. (simultaneously).
e) Set the input selector SW3 to adjust the monitor to accept the level of video signal available; the monitor functions
in the range 1.5 - 5 V p.p.
f) If necessary is possible to invert the image (vertically and horizontally) by inserting the connector to the deflexion
yoke in position CL .
g) If it is necessary to adjust the controls on the removable control panel (either with the panel inserted in the chassis
or connected via its extension lead) the image characteristics are optimized as follows:
H freq. -horizontal scan frequency
Adjust within the range 15.625 +/- 0.3 kHz to obtain the most stable display.
V freq. -vertical scan frequency
Adjust from the condition where the image scrolls upwards to obtain a stable display .
V ampl. -vertical scan amplitude
Adjust for optimum display height.
H ampl.- horizontal scan amplitude
Adjust for optimum display width.
H phase -horizontal phase
Adjust for correct horizontal positioning of the display.
V shift -vertical shift
Adjust for
correct vertical positioning of the display .

SETTING-UP SPECIFICATION
regulation or control
test signal measurement conditions point of point of value
measurement regulation
monitor supply voltage grid
TP10
130 ± 3% V d.c.
horiz. synchronization grid
set SW4, bridge TP6
screen RV5
adjust to obtain most
&
TP7
stable display unbridge
TP6 & TP7
vert. synchronization grid check 50 & 60 Hz
screen RV1
adjust to stabilize upward
scrolling display
horiz. oscillator supply grid
TP12
12 v ± 5% V d.c.
voltage
vert. oscillator supply grid
TP13
26 ± 5% V d.c.
voltage
video amplifier supply grid
TP1
24 ± 5% V d.c.
voltage
video output stage grid
SP11 190 ± 5% V d.c.
supply voltage
diode modulator
grid horizontal amplitude TP9 B3
adjust for maximun *
RV4 set to minimun
G2 voltage
grey scale p.c.b. ZG
TH2 'screen' set for 600 V d.c.
(100:1 probe)**
black level
grey scale set RV203, 204 & 205 to screen RV?
adjust to make the
min &
RV 201 & 202 half
darkest band disappear
and the adjacent band
just v!sible
c.r.t. cut-off none
faintly illuminated screen RV203, 204
eliminate the dominant
screen by G2 & 205
colour by adjustment of
the other two colours,
adjusting brightness
white level white field KR & KG
RV 201 & 202 adjust the level of green
p.c.b. ZG and red cathodes to
sarr.ie as blue
focus
dot medium brightness screen
TH2 focus adjust for best focus
horizontal linearity
grid
screen B1 adjust width of first
square equal to last
*The maximun voltage at TP9 can vary between approximately 34 and 50 V d.c. according to the type of c.r.t. used.
**The position of the shaft of G2 is marked with a reference point.
AN
R
x®
Electronic
Equipment
Manufacturer
(
50134 FIRENZE - ITALY -30, via Riguccio Galluzzi -tel. [phone] (20 linee R.A.) - telex 572341 Hantar-1 - telefax 055/268486