Happ Vision Pro MTG-1901CN User manual

SERVICE AND OPERATION MANUAL
MTG-XX01 SERIES (13”,19”) CGA
OPEN FRAME COLOR MONITORS
19”: 49 -1329 -VP2
13”: 49 -1345 -VP2
MTG-XXO1 Publication A, Issue 1
Information in this publication current as of June, 2003.
Information subject to change as display technology advances.

2
This monitor has been designed and manufactured to deliver high performance video. For continued peak
performance use and safe operation, it is recommended to use only high quality Happ Controls replacement parts
or their exact specified equivalent when servicing.
SAFETY PRECAUTIONS AND WARNINGS
Service Warning
The display contains HIGH VOLTAGE capable of
delivering LETHAL levels of energy. Service should
only be attempted by trained personnel familiar with
the potential dangers inherent with high voltage
equipment.
Safety Related Component Warning
Certain components used in Happ Controls color
monitors are critical for safe operation of the display.
These part numbers are marked by ()on the
schematic diagram. It is essential that these safety
critical components be replaced only with exact
manufacturer specified components to prevent the
possibility of excessive X-radiation emission, electrical
shock, fire or premature component failure. Modifying
the original design without written approval from Happ
Controls is expressly forbidden, will void the original
parts and labor warranty, and may result in creating a
hazardous situation.
X-Radiation Warning
COMPONENTS WHICH MAY AFFECT POTENTIAL
EXCESS EMMISSION OF X-RADIATION IN THE
HORIZONTAL DEFLECTION AND HIGH VOLTAGE
CIRCUITS(INCLUDING THE PICTURE TUBE) ARE
INDICATED ON THE SCHEMATIC DIAGRAM BY A(★).
USE ONLY TYPE AND RATING OF REPLACEMENT
COMPONENT AS SHOWN IN THE PARTS LIST.
1. The only potential source of X-radiation emission
is the picture tube. When the high voltage and
horizontal deflection circuits are operating correctly
there is no possibility of excess X- radiation
emission. NEVER attempt to modify these circuits.
2. Periodically check the high voltage with a reliably
calibrated meter for values notinexcess of
manufacture recommendations. See High Voltage
Shut-down Circuit, page 4 for further details.
CRT Warning
All picture tubes used in Happ Controls monitors are
quipped with an integral implosion protection system.
The picture tube is, however, a highly evacuated
component which outside surfaces are subject to
strong external forces. Care must be exercised so as
not to bump or scratch the tube during installation or
servicing as this may cause the tube to implode,
resulting in possible personal injury and property
damage. Shatter-proof goggles must be worn by
individuals while handling the CRT or installing the
display in the cabinet. Do not handle the CRT by neck.
1. Always ensure the high voltage at the anode cap
is fully discharged prior to handling or service.
2. Replace picture tube only with same type and
number.
Product Safety and Service Guidelines
1. Serviceshould be performed only after reading
all of the warnings and precautions in the manual
and as labeled on the CRT and chassis.
2. Where a short circuit has occurred, replace all
components that indicate evidence of overheating.
Also check for evidence of overheating or poor
connection on all plastic connectors.
3. Inspect wiring for frayed leads and damaged
insulation. When service is required, observe
original lead dress, assume lead dress is followed
as from the factory, especially in the high voltage
circuitry area.
4. Do not expose this display to rain or place in areas
where the potential for exposure tomoisture is high.
Additionally, do not mount the removed VR PCB if
so equipped outside the cabinet or in areas where
there is a possibility of exposure to moisture.
5. All protective devices must be reinstalled per
original design.

3
1. Power Supply
This color monitor shall maintain the specified
performance in the range described below.
Frequency : 47Hz ～63Hz
Voltage : 90VAC-264VAC
Consumption : Less than 70Watts
2. Input Signal
The referenced video controller used for adjustment
and test will guarantee the performance described
below.
Video signals
Red, Green, Blue analog input
150Ωtermination to ground
Level : 0 to 2.4Vp-p
Polarity : Positive
Sync signals
Separate H/V sync input
10k termination to ground
Level : TTL level
Polarity : Positive or Negative
3. HorizontalDeflection
Scanning Frequency : Nominal (15-17.5kHz)
Retrace period :〈11.5us
4. Vertical Deflection
Scanning Frequency : Nominal (50-65Hz)
Retrace period :〈900us
5. Linearity
±5%
6. Picture Size Regulation
Static Regulation 2%
Dynamic Regulation 1.5%
7. Geometric Distortion
It is acceptable that pincushion, trapezoid, paralle-
logram, barrel distortion, out of orthogonality and
various waves can appear all together. If the data
area parameter remains within the limits of 2%.
8. Degaussing
This color monitor shall employ an automatic
degaussing circuit, The degaussing sequence
shall be self activated at the time of switch-on.
After a degaussing cycle, the demagnetizing circuit
shall recover.
9. High Voltage
This color monitor shall employ an X-radiation
shut-down protection with internal circulitry.
13" : 26KV
19" : 27KV
10. Environmental Conditions
Temperature : 10 ~ 55℃(Operating)
Humidity : 10 ~ 90%, no condensation
1. Apply line AC,90V-264V, in your locality to the
monitor through W801.
2. Apply signal source to the monitor through W301.
3. Set up user adjustable controls.
All controls are preset at the factory for optimum
performance. If adjustment is necessary to suit
program material, most adjustments can be made
using only the controls on the remove VR PCB.
Other controls in the monitor should be adjusted
only if those controls have been tampered with or if
major repairs were necessary on the monitor.
PERFORMANCE AND OPERATING DATA
OPERATING INSTRUTIONS

4
1. Remote VR PCB
Contrast, VR720
Brightness, VR721
H-Position, VR722
H-Size, VR723
V-Size, VR724
V-Position, VR725
2. Main PCB
Horizontal OSC, VR301
V-HOLD, VR303
V-LIN, VR302
3. Flyback Transformer
Focus Adjustment
Screen Adjustment
4. Neck PCB
Red Cut-off, VR552
Red Gain, VR551
Green Cut-off, VR555
Green Gain, VR553
Blue Cut-off, VR554
Blue Gain, VR556
These controls in main, neck PCB and flyback transformer have been preset and sealed at the factory
and should not require further attention.
The chassis of this color monitor has been
designed to emit a minimum of soft X-radiation,
in accordance with US DHHS rules 21 CFR,
subchapter J, applicable at date of manufacture
A high voltage shut-down circuit, as shown
below, guarantees horizontal oscillation shut-
down.
A flyback pulse is generated at pin 10 of flyback
transformer. This pulse is fed through a
resistive divider network to pin 13 of I301.
The voltage appearing on pin 13 is compared
with a precise internal voltage in the IC should
the EHT exceed 28KV the change in voltage on
pin 13 actuates a circuit which inhibits the
oscilator and consequently the EHT circuit.
The circuit continues to inhibit the oscillator
until the fault condition is corrected, and even
then the monitor has to be switched off and on
cillator cable is re-activated.
HIGH VOLTAGE SHUT-DOWN CIRCUIT
CONTROLS

5
LOC. PARTS NAME SPECIFICATIONS
MAIN PCB
C301 C ELECTRO 16V 10uF RSS
C302 C CERAMIC CH 50V 22pF J
C303 C ELECTRO 50V 10uF RSS
C304 C ELECTRO 16V 10uF RSS
C305 C CERAMIC CH 50V 22pF J
C306 C ELECTRO 50V 10uF RSS
C307 C ELECTRO 16V 10uF RSS
C308 C CERAMIC CH 50V 22pF J
C309 C ELECTRO 50V 10uF RSS
C310 C CERAMICF50V 0.1uF Z
C311 C CERAMICF50V 0.1uF Z
C312 C CERAMICF50V 0.1uF Z
C313 C CERAMICF50V 0.1uF Z
C314 C CERAMICF50V 0.1uF Z
C315 C CERAMICF50V 0.1uF Z
C317 C CERAMICF50V 0.1uF Z
C318 C CERAMICF50V 0.1uF Z
C319 C CERAMICF50V 0.1uF Z
C320 C ELECTRO 50V 1uF RSS
C321 C CERAMICF50V 0.1uF Z
C322 C ELECTRO 16V 100uF RSS
C323 C CERAMICF50V 0.1uF Z
C324 C CERAMICF50V 0.1uF Z
C325 C CERAMICF50V 0.1uF Z
C326 C CERAMICF50V 0.1uF Z
C327 C CERAMICB50V 680pF K
C328 C CERAMICF50V 0.1uF Z
C330 C CERAMICB50V 150pF K
C331 C ELECTRO 16V 10uF RSS
C332 C MYLAR 100V 0.1uF J
C333 C CERAMICB50V 100pF K
C334 C CERAMICB50V 680pF K
C335 C CERAMICB50V 680pF K
C336 C CERAMICB50V 1000pF K
C339 C ELECTRO 16V 470uF RSS
C340 C ELECTRO 25V 100uF RSS
C341 C ELECTRO 35V 1000uF RSS
C342 C CERAMICB500V 1000pF K
C343 C ELECTRO 50V 4.7uF RSS
C344 C ELECTRO 16V 220uF RSS
C345 C MYLAR 100V 0.1uF J
C346 C MYLAR 100V 0.1uF J
LOC. PARTS NAME SPECIFICATIONS
C348 C ELECTRO 16V 100uF RSS
C349 C CERAMICB50V 680pF K
C350 C CERAMICB50V 680pF K
C351 C CERAMICB50V 680pF K
C352 C CERAMICB50V 680pF K
C353 C CERAMICB50V 680pF K
C354 C CERAMICB50V 680pF K
C357 C CERAMICB50V 680pF K
C360 C ELECTRO 25V 1000uF RSS
C362 C ELECTRO 35V 470uF RSS
C363 C CERAMICB50V 1000pF K
C364 C CERAMIC CH 50V 27pF J
C366 C CERAMICB50V 820pF K
C367 C MYLAR 100V 0.033uF J
C368 C MYLAR 100V 0.033uF J
C369 C ELECTRO 50V 4.7uF RSS
C371 C TANTAL TB 35V 1uF K
C372 C ELECTRO 50V 10uF RSS
C373 C MYLAR 100V 0.1uF J
C374 C MYLAR 100V 0.01uF J
C378 C MYLAR 100V 0.1uF J
C379 C ELECTRO 50V 22uF RSS
C380 C MYLAR 100V 8200pF J
C381 C MYLAR 100V 0.01uF J
C382 C ELECTRO 50V 1uF RSS
C383 C ELECTRO 50V 1uF RSS
C384 C MYLAR 100V 6800pF J
C385 C MYLAR 100V 5600pF J
C386 C MYLAR 100V 1000pF J
C389 C ELECTRO 35V 1000uF RSS
C390 C MYLAR MPE 63V 1uF J
C401 C MYLAR NPPS 1.6KV 2200pF J
C403 C CERAMICB500V 1000pF K
C404 C CERAMICB500V 2200pF K
C405 C MYLAR 100V 0.1uF J
C408 C MYLAR NPPS 1.6KV 8200pF J
C409 C MYLAR NPP 400V 0.01uF G
C410 C CERAMICB500V 100pF K
C411 C MYLAR 100V 0.1uF J
C412 C ELECTRO 250V 10uF RSS
C420 C MYLAR MPP 200V 0.47uF J
C422 C MYLAR 250V MF 3.3uF (K)
C423 C MYLAR MPP 400V 0.39uF J
PARTS LIST

6
LOC. PARTS NAME SPECIFICATIONS
C801 C MYLAR AC 275V 0.1uF J
C802 C MYLAR AC 275V 0.47uF
C803 C ELECTRO 400V 220uF FHS
C804 C MYLAR NPPS 1.6KV 2200pF J
C805 C ELECTRO 25V 470uF RSS
C806 C MYLAR 100V 2200pF J
C807 C ELECTRO 16V 100uF RF
C808 C ELECTRO 160V 10uF RSS
C809 C ELECTRO 160V 220uF RUS
C810 C ELECTRO 35V 470uF RSS
C811 C ELECTRO 35V 470uF RSS
C812 C ELECTRO 25V 220uF RSS
C813 C ELECTRO 25V 100uF RSS
C814 C MYLAR 200V 0.1uF K
C815 C CERAMICB500V 1000pF K
C817 C CERAMICDS AC250V E 2200pF M
C818 C ELECTRO 160V 220uF RUS
C820 C CERAMICDS C250V E 4700pF M
C822 C CERAMICDS AC250V E 4700pF M
C823 C CERAMICDS AC250V E 2200pF M
C824 C CERAMICDS AC250V E 2200pF M
D301 DIODE 1N4148
D302 DIODE 1N4148
D303 DIODE 1N4148
D304 DIODE 1N4937
D307 DIODE 1N4148
D311 DIODE UZ-5.1B
D312 DIODE UZ-5.1B
D313 DIODE UZ-12B
D314 DIODE UZ-12B
D315 DIODE UZ-12B
D360 DIODE 1N4937
D361 DIODE UZ-22BSC
D401 DIODE PS156R
D402 DIODE RH4F
D403 DIODE RU4AM
D405 DIODE 1N4937
D407 WIRE COPPER AWG22 1/0.65
D801 DIODE D3SBA60-4100
D802 DIODE 1N4937
D804 DIODE 1N4937
D805 DIODE UZ-7.5B
D807 DIODE 1N4937
LOC. PARTS NAME SPECIFICATIONS
D808 DIODE 1N4937
D809 DIODE 1N4937
D810 DIODE RU3AM
D813 DIODE 1N4937
D814 DIODE 1N4937
F801 FUSE 218 250V 3.15A
I201 IC LM1205N
I301 IC LA7851
I302 IC LA7833
I302A HEAT SINK MH9212-B1
I801 IC PC123Y11
I802 IC STRS6707
I802A HEAT SINK WJ-HTSB03
I803 IC KA7812
L301 COIL 101K
L360 COIL 5.6uH K
L401 COIL TRL-64
L402 COIL CP-002
L801 LINE FILTER LF-2828B
L802 COIL 101K
L803 COIL 101K
Q301 TR KSC945C-Y
Q302 TR KSC945C-Y
Q303 TR KSC945C-Y
Q304 TR 2N3906
Q305 TR 2N3906
Q310 TR KSC945C-Y
Q360 TR 2N4401
Q401 TR KSC2330-YTA
Q402 TR 2SC4769-2/3
Q402A HEAT SINK MH9212-C
Q403 TR KSA733C-Y
Q404 TR 2N3904
Q405 TR KTD2058
Q405A HEAT SINK MH9212-B6
Q801 TR KSC2073
Q802 IC SE120N
R301 R CARBON FILM 1/6W 33K J
R302 R CARBON FILM 1/6W 5.6K J
R303 R CARBON FILM 1/6W 4.7K J
R304 R CARBON FILM 1/6W 390 J
R305 R CARBON FILM 1/6W 220 J
R306 R CARBON FILM 1/6W 33K J
PARTS LIST

7
LOC. PARTS NAME SPECIFICATIONS
R307 R CARBON FILM 1/6W 5.6K J
R308 R CARBON FILM 1/6W 4.7K J
R309 R CARBON FILM 1/6W 390 J
R310 R CARBON FILM 1/6W 220 J
R311 R CARBON FILM 1/6W 33K J
R312 R CARBON FILM 1/6W 5.6K J
R313 R CARBON FILM 1/6W 4.7K J
R314 R CARBON FILM 1/6W 390 J
R315 R CARBON FILM 1/6W 220 J
R316 R CARBON FILM 1/6W 51K J
R317 R CARBON FILM 1/6W 30 J
R320 R CARBON FILM 1/6W 1.1K J
R323 R CARBON FILM 1/4W 10 J
R324 R CARBON FILM 1/6W 390 J
R328 R CARBON FILM 1/6W 390 J
R329 R CARBON FILM 1/6W 47 J
R330 R CARBON FILM 1/6W 47 J
R331 R CARBON FILM 1/6W 510 J
R333 R CARBON FILM 1/6W 390 J
R334 R CARBON FILM 1/6W 100 J
R335 R CARBON FILM 1/6W 100 J
R336 R CARBON FILM 1/6W 2.7K J
R337 R CARBON FILM 1/6W 10K J
R338 R CARBON FILM 1/6W 10K J
R339 R CARBON FILM 1/6W 100 J
R340 R CARBON FILM 1/6W 2.7K J
R341 R CARBON FILM 1/6W 8.2K J
R342 R CARBON FILM 1/6W 510 J
R343 R CARBON FILM 1/6W 2.2K J
R344 R CARBON FILM 1/6W 18K J
R345 R CARBON FILM 1/6W 22K J
R346 R CARBON FILM 1/6W 12K J
R347 R CARBON FILM 1/6W 12K J
R348 R CARBON FILM 1/6W 22K J
R349 R CARBON FILM 1/6W 18K J
R350 R CARBON FILM 1/6W 1K J
R351 R CARBON FILM 1/6W 150 J
R352 R CARBON FILM 1/6W 150 J
R362 R CARBON FILM 1/6W 22K J
R363 R CARBON FILM 1/6W 10K J
R364 R CARBON FILM 1/6W 2K J
R366 R CARBON FILM 1/6W 22K J
R367 R CARBON FILM 1/6W 470 J
LOC. PARTS NAME SPECIFICATIONS
R368 R METAL FILM 1/6W 18K F
R369 R CARBON FILM 1/6W 180K J
R370 R CARBON FILM 1/6W 120K J
R371 R CARBON FILM 1/6W 330 J
R372 R CARBON FILM 1/6W 68K J
R376 R CARBON FILM 1/6W 4.7K J
R378 R METAL FILM 1/6W 10K F
R379 R METAL FILM 1/6W 3.3K F
R380 R CARBON FILM 1/4W 430 J
R381 R CARBON FILM 1/6W 15K J
R382 R CARBON FILM 1/6W 560 J
R383 R CARBON FILM 1/6W 33K J
R384 R CARBON FILM 1/6W 510 J
R385 R METAL FILM 1/6W 9.35K F
R386 R CARBON FILM 1/6W 15K J
R389 R CARBON FILM 1/6W 47 J
R391 R CARBON FILM 1/6W 2.7K J
R392 R CARBON FILM 1/6W 6.2K J
R401 R METAL OXIDE 1W 10K J
R403 R CARBON FILM 1/4W 1K J
R404 R CARBON FILM 1/2W 15K J
R405 R CARBON FILM 1/4W 100 J
R406 R METAL OXIDE 1W 100 J
R407 R CARBON FILM 1/4W 1.8K J
R408 R CARBON FILM 1/6W 33 J
R409 R CARBON FILM 1/4W 200 J
R410 R CARBON FILM 1/2W 560 J
R411 R METAL OXIDE 1W 22K J
R412 R METAL OXIDE 1W 1K J
R413 R CARBON FILM 1/6W 2.7K J
R414 R METAL OXIDE 1W 0.33 J
R419 R CARBON FILM 1/4W 3.3K J
R420 R CARBON FILM 1/6W 1K J
R421 R CARBON FILM 1/4W 4.7K J
R423 R CARBON FILM 1/6W 8.2K J
R424 R CARBON FILM 1/6W 1K J
R425 R CARBON FILM 1/6W 10K J
R426 R CARBON FILM 1/2W 7.5K J
R427 R METAL OXIDE 1W 100 J
R428 R CARBON FILM 1/2W 100 J
R429 R METAL OXIDE 1W 560 J
R430 R CARBON FILM 1/6W 18K J
R431 R CARBON FILM 1/6W 10K J
PARTS LIST

8
LOC. PARTS NAME SPECIFICATIONS
R436 R CARBON FILM 1/2W 3.3 J
R438 WIRE COPPER AWG22 1/0.65
R801 POSISTOR ECPCC180M290
R802 R CEMENT 10W 2.2 J (R TYPE)
R803 R METAL OXIDE 2W 47K J
R804 R METAL OXIDE 2W 47K J
R805 R CARBON FILM 1/4W 1K J
R807 R CARBON FILM 1/4W 1.5K J
R809 R CEMENT 2W 0.47 J (MPR TYPE)
R810 R CARBON FILM 1/4W 2.2K J
R812 R CARBON FILM 1/2W 68 J
R813 R CARBON FILM 1/2W 20K J
R814 R CARBON FILM 1/2W 20K J
R816 R METAL OXIDE 1W 1.5K J
R818 R METAL OXIDE 1W 1 J
R819 R METAL OXIDE 2W 15K J
R821 R METAL OXIDE 1W 27 J
R830 R CARBON FILM 1/6W 2.2K J
SW301 SW-PUSH IT-2203
T401 TRANS-DRIVE HD-1035G
T402 FBT MCK-20A036
T802 TRANS-S/WTM-1901
TP1 WAFER CENTER PIN
TP2 WAFER CENTER PIN
TP3 WAFER CENTER PIN
TP4 WAFER CENTER PIN
VR301 VR-SEMI NVZ 6TLT 2K
VR302 VR-SEMI NVZ 6TLT 50K
VR303 VR-SEMI NVZ 6TLT 200K
VR401 VR-SEMI NVZ 6TLT 20K
W301 WAFER LW1143-10(PIN7 NC)
W302 WIRE LEAD UL 1015 #18 BK 150
W401A WAFER SMW250-12
W402 WAFER YFW800-04
W501A WAFER 5267-05A
W510A WAFER 5267-04A
W801 WAFER YFW800-02
W802 WIRE LEAD UL 1015 #18 BK 150
W803 WAFER YFW600-02
W804 WIRE LEAD UL 1015 #18 BK 150
LOC. PARTS NAME SPECIFICATIONS
NECK PCB
C514 C CERAMICB2KV 1000pF K
C551 C CERAMICB50V 150pF K
C552 C CERAMICB50V 150pF K
C553 C CERAMICB50V 150pF K
C560 C ELECTRO 16V 100uF RSS
L551 COIL 82uH J
L552 COIL 82uH J
L553 COIL 82uH J
Q551 TR KTC3229
Q552 TR KTC3229
Q553 TR KTC3229
R535 R CARBON FILM 1/2W 100K J
R551 R CARBON FILM 1/2W 1K J
R552 R METAL OXIDE 3W 4.7K J
R553 R CARBON FILM 1/6W 390 J
R554 R CARBON FILM 1/6W 2.7K J
R555 R CARBON FILM 1/6W 390 J
R556 R CARBON FILM 1/2W 1K J
R557 R CARBON FILM 1/2W 1K J
R558 R CARBON FILM 1/6W 2.7K J
R560 R CARBON FILM 1/2W 33 J
R561 R METAL OXIDE 3W 4.7K J
R562 R METAL OXIDE 2W 1 J
R563 R CARBON FILM 1/6W 2.7K J
R564 R METAL OXIDE 3W 4.7K J
R569 R CARBON FILM 1/6W 390 J
SC01 SOCKET CRT ISHS04S
SG501 SPARK GAP MTA-301M
SG502 SPARK GAP MTA-301M
SG503 SPARK GAP MTA-301M
VR551 VR-SEMI V09 200 (CCT-117A)
VR552 VR-SEMI V09 2K (CCT-117A)
VR553 VR-SEMI V09 200 (CCT-117A)
VR554 VR-SEMI V09 2K (CCT-117A)
VR555 VR-SEMI V09 2K (CCT-117A)
VR556 VR-SEMI V09 200 (CCT-117A)
W501 WAFER YFW800-01
PARTS LIST

9
LOC. PARTS NAME SPECIFICATIONS
CONTROL PCB
C701 C ELECTRO 16V 10uF RSS
D701 DIODE UZ-5.1B
R701 R CARBON FILM 1/4W 20K J
R702 R CARBON FILM 1/4W 68K J
R703 R CARBON FILM 1/4W 4.7K J
R704 R CARBON FILM 1/4W 4.7K J
R705 R CARBON FILM 1/4W 4.7K J
R706 R CARBON FILM 1/4W 330 J
R707 R CARBON FILM 1/4W 5.6K J
R708 R CARBON FILM 1/4W 470 J
R709 WIRE COPPER AWG22 1/0.65
VR720 VR-SEMI H09 200K (CCT-092A)
VR721 VR-SEMI H09 10K (CCT-092A)
VR722 VR-SEMI H09 10K (CCT-092A)
VR723 VR-SEMI H09 10K (CCT-092A)
VR724 VR-SEMI H09 500 (CCT-092A)
VR725 VR-SEMI H09 10K (CCT-092A)
W401B WAFER SMAW250-12
PARTS LIST