BELINEA 103026 User manual

_ Belnea
Service Manual
17-inch Color Monitor
(Belinea 103026)

Belnea (Maxdata 103026)
Table of Contents
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Belnea
1
Precautions
(Maxdata 103026)
Follow these safety and servicing precautions to prevent damage and to protect against potential hazards
such as electrical shock and X-rays.
1-1 Safety Precautions
j-
1.
1-1 Warnings
For safety purpose, do not attempt to modify
the circuit board, and always disconnect the AC
power before performing servicing on the
monitor.
. Operation of the monitor outside its cabinet or
with the cover removed involves the risk of
shock hazard. Repair work on the monitor
should only be attempted by service personnel
who are thoroughly familiar with all necessary
safety precautions and procedures for working
on high voltage equipment.
. Do-not lift the CRT by the neck. After
completely discharging the high voltage anode,
handle the CRT only when wearing shatterproof
goggles. Try to keep the CRT away from the
body during handling.
. High voltage should always be kept at the rated
value, no higher. Only when high voltage is
excessive are X-rays capable of penetrating the
shell of the CRT. Operation at high voltages
may also cause failure of the CRT or high
voltage circuitry.
. The CRT is especially constructed to limit X-
ray emission to 0.5mR/HR at 300 microamperes
anode current. To ensure continued X-ray
protection, replace the CRT with only the same
or equivalent type as the original, and adjust the
anode’s voltage to the designated maximum
rating, never to exceed.
1-1-2 Safety Checks
Before returning the monitor to the user, perform
the following safety checks:
1.
Inspect to make certain that each lead dress is
not pinched or that hardware is not lodged
between the chassis and other metal parts in
the monitor.
. Inspect all protective devices such as
nonmetallic control knobs, insulating materials,
cabinet backs, adjustment and compartment
covers or shields, isolation resistor-capacitor
networks, mechanical insulators, etc.
. AC Leakage Current Check
Always perform the AC Leakage Current
Check on the exposed metal parts, including
metal cabinets, screwheads and control shafts,
as follows:
a) Plug the AC line cord directly into a rated
AC outlet. Do not use an isolation
transformer during the check.
b) Use an AC voltmeter with at least 5000
ohms per volt sensitivity as follows:
Connect a 1500 ohms, 10 watt resistor
paralleled by a 0.15uF AC capacitor in series
with all exposed metal cabinet parts anda
known earth ground, such as electrical
conduct or electrical ground connected to
earth ground, as shown in the Figure 1-1.
Measure the AC voltage across the
combination of resistor and capacitor.
Figure 1-1. Set Up For AC Leakage Current Check
To exposed meatal
cabinet part
To known
earth ground
4500 ohm 10 watt
c) Reverse the AC plug at the AC outlet and
repeat the steps for AC voltage
measurements for each exposed metal part.
d) Voltage reading must not exceed 0.3 volts
RMS, equivalent to 0.2 milliampere AC. Any
value exceeding this limit ill constitute a
potential shock hazard and must be
corrected immediately.
Page 2
Precautions

Belnea (Maxdata 103026)
1-1-3 Product Safety Notices
Many
electrical
and
mechanical
parts
in
this
chassis
have
special
safety-related
characteristics
which
are
often
not
evident
from
visual
inspection,
the
protection
afforded
by
them
may
not
be
obtained
by
replacing
them with
components
rated
for
higher
voltage,
wattage,
etc.
Before
replacing
any
of
these
components,
consult
the
Recommended
Spare
Parts
List
given
at
the end
of
this manual. Any
of
the replacements
that
do
not
provide
the
same
safety
characteristics
may
result
in
shock,
fire,
X-ray
emission
or
other
hazards.
1-2 Servicing Precautions
Warning:
An
electrolytic
capacitor
installed
with
the
wrong
polarity
might
explode.
Caution:
Before
performing
servicing
covered
by
this
service
manual,
read
and
follow
the
Safety
Precautions
section
of
this manual.
Note:
If
unforeseen
conflict
between
the
following
servicing
precautions
and
any
of
the
safety
precautions,
always
follow
the
safety
precautions
1.
Follow
closely
the
servicing
precautions
printed
on
the
monitor
cabinet
and
chassis.
2.
Always
unplug
the
AC
power
cord
from
the
AC
power
source
before
removing
or
installing
any
component
ot
assembly,
disconnecting
PCB
plugs
or
connectors
and
connecting
a
test
component
in
parallel
with
a
capacitor.
3.
When
replacing
parts
or
circuit
boards,
clamp
the
lead
wires
around
the
component
before
soldering.
4,
When
replacing
a
high
wattage
resistor
(>0.5W
metal
oxide
film
resistor)
in
the
circuit
board,
keep
the
resistor
about
1
cm
(1/2
inch)
away
from
the
circuit
board.
5. Keep wires away from the high voltage or high temperature components.
6. Keep wires in their original positions so as to minimize interference.
7.
Always
connect
a
test
instrument’s
ground
lead
to
the
instrument
chassis
ground
before
connecting
the
positive
lead;
always
remove
the
instrument’s
ground
lead
last.
After
putting
the
rear
cover
back
and
make
sure
the
monitor
is
working
properly,
the
Hi-Pot
&
Ground
Continuity
tests
MUST
BE
performed
before
the
monitor
is
returned
to
user.
1-3 Hi-Pot Test
1, Test Equipment
Puncture
test
model
PM5530
ADT
or
KIKUSU
TOS-8750
voltage
tester
or
equivalent
approved
equipment.
Note : The test equipment must be calibrated in regular period.
2. Test Setup
a) Apply voltage : DC 2100 VDC
b) Test duration : 3 seconds
c) Cutoff current should be set to 3 mA
3. Test Procedure
a) Unplug power cord from AC source.
b) Put the power switch of the monitor in the “ON” position.
c) Leave signal cable un-connected.
Precautions Page} |

Belnea (Maxdata 103026)
d) Plug monitor power cord to the Hi Pot tester terminals.
e) Turn on tester and watch the indicator or beeper.
f) If the indicator lamp lighten, or beeper beeps, the test fails.
1-4 Ground Continuity Test
1. Test Equipment
AC low ohm tester TOS-6100 or equivalent approved equipment.
Note : The test equipment must be calibrated in regular period.
2. Test Setup
a) Test duration : 3 seconds
b) Set current limit at 25 A
c) The grounding resistance must be less than 0.1 ohm.
3. Test Procedure
a) Plug the monitor power cord to the tester terminals.
b) Make sure all connections are well-contacted.
c) Turn on monitor power and tester power.
d) Press “Test” button. .
e) If green light shows up, means test OK.
If red light shows up, means test fails.
f) Ifthe Tester has a digital display, the resistance value must not exceed 0.1 ohm.
Note : Be sure not to touch the metal portion of the signal cable head during testing.
| Page 4 Precautions

Belnea (Maxdata 103026)
2 Product Specifications
2-1 Specifications
17-inch (16-inch Visual image area), sloted mask, 90 degrees
Picture Tube deflection, dot type black matrix, medium short persistence
phosphor, dark tint, non-glare/ anti-static screen,
0.28 mm dot pitch
s ing F Z VGA, Super VGA, 1024x768@60/70/75/85 Hz
eRRRE ee REGUS? 1280x1024@60Hz
Maximum Resolution 1280 dots (H) x 1024 lines (V) @60Hz refresh rate
Display Area 306 mm (H) x 230 mm (V) typical
Display Characters 80 char. x 60 rows on a 10 x 10 matrix
Display
Colors
Analog
|
ty,
jimited
Colors
Input
Horizontal: 30 to 70 kHz
Frequencies Vertical : 50 to 160 Hz
iso Sk _[Amfon'07 ven ROB peeve =
75 Watts (maximum) AC rated voltage, 100VAC to 240VAC
Center Area : < 0.3 mm; Corner Area : < 0.4mm
Power On/Off, Contrast, Brightness, Horizontal Size, Horizontal
Position, Vertical Size, Vertical Position, Pincushion, Trapezoid,
Rotation, Color temperature, Language, Display Frequency,
Degauss, Recall, H. Moire,
V. Moire
Service Controls PWB-1618
PWB-1606 : power voltage adjust (VR801), high voltage adjust
10 (see Table 2-2. Timing Chart)
Operation temperature : 10°C to 40°C ambient
Operation Humidity : 20% to 80% ambient
Storage temperature : -40°C to 65°C ambient
Storage Humidity : 10% to 90% (non-condensing)
Altitude : Non operating 40,000 feet sea level
operating 10,000 feet sea level
User Controls
Environmental
Considerations
Note: Above specifications are subject to change without prior notice.
Product Specifications Pages |

| Belnea (Maxdata 103026)
2-2 Signal Cable Pin Connections
Table 2-1. Signal Cable Pin Assignment
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Note* This pinis used for selftest detection. Connect this pin to ground at the PC end.
** — For PC 99: This pin will provide +5V from PC side.
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| Page 6 Product Specifications

Belnea (Maxdata 103026)
2-3 Timing Chart
This section describes the timings that the computer industry recognizes as standard for computer-generated
video signals.
Table 2-2. Timing Chart
Pa Ee ce aee ee ees eee
H. Dots 720 640 640 640 800 800 1024 800 1280 1024
V. Dots 400 480 480 480 600 600 {| 600 1024 768 |
37.5
H-freq (kHz)
Syne Polarity
A period us
B Blking us
C Syne us
D B.P. us
E Active us
F FE.P. us
V-freg (Hz)
Sync Polarity
O Period ms
P Biking ms
Q Sync ms
R B.P. us
S Active us
T F.P. us
Seperate Sync
Horizontal E Vertical .
Video == Video iw
o
J
4
Le
a
H.Parameters: V.Parameters:
A: Period B: Blanking Time G: Period H: Blanking Time
[ C: Syne Width D: Back Porch L Sync Width J: Back Porch
ae E: Active Time F: Front Porch K: Active Time L: Front Porch
Product Specifications Page? }

Belnea (Maxdata 103026)
2-4 Display Power Management Signal (DPMS)
Note: The monitor will be driven into “Power Saving” mode by the control signal from the display
controller, as indicated by the amber-color power LED.
Table 2-3. Display Power Management Signal (DPMS)
State Power LED
Cousumption Light
Active
<
* For power consumption : 75W Max. (@ 230V AC, preset size and maximum light output condition)
2-5 TCO Version (Optional)
The monitor meets the TCO 95/99, NUTEK energy saving, electric and magnetic field requirements.
Also it is compliant with TCO 95/TCO 99 labelling scheme.
The emission from magnetic and electric field must comply with the limits specified by the Swedish Board
for Measurement and Testing, commonly known as MPR 1990 recommendations. These limits are sum-
marized in the Table 2-4.
Table 2-4. TCO 95 Emission Requirements
Electrostatic +/- 500 V +/- 500 V
Potential
The monitor is designed with selected CRT and carefully routed wires around CRT, make sure exactly the
same routing scheme is used when doing CRT replacement.
| Page 8 Product Specifications