Tatung VM14AF Schematic

Page 1
VM-14AF
SERVICE MANUAL
Page 2
CONTENTS
1 SPECIFICATION
2 OPERATING INSTRUCTIONS
3 IMPORTANT SAFEGUARDS
4 ADJUSTMENT PROCEDURE
5 BLOCK DIAGRAM
6 SERVICE NOTES
7 CIRCUIT DIAGRAM
8 LAYOUT DIAGRAM
9 EXPLODED DRAWING
10 PARTS LIST
Page 3
1 SPECIFICATION
14” Mono Chrome Monitor
CRT SIZE : 14” 90 DEGREES
PHOSPHOR : H68AU
FACEPLATE : NON-GLARE
SCAN FREQ : HOR. 31.5 KHz , 35.5 KHz, 35.2 KHz, 38 KHz VER. 40 75 Hz
RESOLUTION : 640 x 480, 800 x 600, 1024 x 768
BANDWIDTH : 26 MHz, 35 MHz, 45 MHz
VIDEO SIGNAL : ANALOG R.G.B. INPUT, 1 Vp-p MAX
SYNC INPUT TYPE : H-SYNC, V-SYNC TTL
INPUT CONNECTOR : 15 PIN D SHELL
USER CONTROL : BRI, CON, POWER SW, V- SIZE, H-PHASE
INPUT VOLTAGE : AC 100 – 240V, 50/60 Hz (AU TO)
POWER CONSUMPTION: 33W MAX
DIMENSION : 385W x 370H x 385D mm
NET WEIGHT : 7.5 Kg
SAFETY : UL, CSA, DHHS, CE (LVD)
EMI : FCC – B, CE (EMC)
Page 4
2 OPERATING INSTRUCTIONS
2-1 POWER SWITCH
Power on/off switch is a push button. To turn on the power of the unit, press this switch. To turn off the unit, press it again.
2-2 POWER-ON INDICATOR
The power-on indicator is lit when the power is turned on.
2-3 BRIGHTNESS CONTROL
Turn the brightness control clock-wise to increase the brightness and counter clock-wise to decrease it.
2-4 CONTRAST CONTROL
Turn the contrast control clock-wise to increase the contrast and counter clock-wise to decrease it.
2-5 HORIZONTAL PHASE CONTROL
Turn the control clock-wise to adjust the screen to the left and counter clock-wise to adjust the screen to the right.
2-6 VERTICAL SIZE CONTROL
To adjust vertical size for all modes: turn the control clock-wise or counter clock-wise until a suitable height is achieved.
Page 5
3 IMPORTANT SAFEGUARDS
For your own safety read all instructions and retain them for further reference.
3-1 POWER PL UG
This display monitor is equipped with a 3-wire grounding type power plug. The third pin provides a safety ground for the display frame and will only fit into the power outlet of compatible configuration.
Contact your technician to replace an obsolete outlet. Do not defeat the safety purpose of the grounding plug.
3-2 POWER INPUT
This display should be operated only from the types of power source indicated on the label. If there is any question about the type of power supplied to the outlet consult your technician or dealer.
3-3 VENTILATION
Openings on the cabinet back and bottom are provided for ventilation. To insure reliable operation and to protect the display from overheating these openings must not be blocked or covered. Do not place the display near or over a radiator or heating vent. If this unit is installed within another enclosure be sure that adequate ventilation has been provided.
Never push objects of any kind through the cabinet openings as they may come into contact with dangerous voltage points or cause short circuits that could result in fire or electrical shock.
3-4 ATTACHMENTS
Signal sources must be of approved types and properly grounded. If safety standards are to be maintained a service technician should perform routine safety tests to determine that all the equipment are in safe operating condition.
Overloaded or poorly grounded AC power systems can cause severe difference in ground potential between the display and the signal source. This is the case particularly on long video lines where the display and the source are plugged into different AC power circuits. Besides causing signal instability, ground potential may be great enough to present a shock hazard. Ground potential tests should be part of routine safety check carried out by a service technician.
Page 6
3-5 INSTALLATION
Do not place the display on an unstable cart, stand or shelf where it may fall and injure personnel or cause damage to the equipm ent. Install the unit on a solid firm base whenever possible.
Route the power cord and all cables so they will not be walked on or tripped over. Do not allow anything to rest on the power cord.
Do not install this display in wet areas or wherever it may be exposed to rain or water. Do not spill liquid of any kind on the unit.
3-6 CLEANING
Unplug the power cord from the outlet before cleaning the display . Use only a damp cloth and mild detergent.
Do not use strong liquid cleaner or aerosol sprays. Do not attempt to clean the interior of the unit; this action must be performed by the service technician as required during normal maintenance.
3-7 SERVICING
Removal of the back by an unauthorised person may expose the user to dangerous voltage or other hazards.
Refer all servicing to qualified service personnel. Unplug the display from the power outlet and notify the service technician.
(a) If liquid has been spilt into the display.
(b) If the display has been exposed to rain or water.
(c) If the display has been dropped or the cabinet damaged.
(d) If fuse continue to blow.
(e) If the power cord is damaged or frayed.
(f) If a distinct change from normal operation is apparent.
Page 7
4 ADJUSTMENT PROCEDURE
This alignment procedure is for adjusting/testing picture perform ance. In order to obtain the optimum result, the following adjustment sequence must be followed step by step:
4-1 Check B+ voltage
(a) Test pattern: cross hatch (b) Set up external brightness and contrast VR to central position (c) Make sure 30Vdc = 0.1 Vdc use digital multimeter positive lead
test D913 negative point, negative lead to ground.
4-2 Vertical linearity adjustment:
(a) Test pattern: cross hatch (b) Set up external brightness and contrast VR to central position (c) Adjust VR300 to make equal distance between top-centre and
bottom-centre.
4-3 Horizontal-hold adjustment:
(a) Test pattern: cross hatch (b) Set up external brightness and contrast VR to central position (c) Turn off horizontal-sync (pin to ground) (d) Adjust VR400 to make pattern upright.
4-4 Geom etric distortion pattern adjustment:
(a) Test pattern: cross hatch (b) Set up external brightness and control VR to central position (c) Adjust eight magnets on the deflection yoke make picture to the
best condition.
4-5 Video Centering adjustment
(a) Test pattern: cross hatch (b) The video is centered by rotating the two small ma gnetic rings at
the rear of the yoke.
4-6 Horizontal-width adjustment
(a) Test pattern: cross hatch (b) Set up external brightness and contrast VR to central position (c) Adjust L401 to make picture width within 228 + 4 mm.
4-7 Vertical height adjustment:
(a) Test pattern: cross hatch (b) Set up external brightness and contrast VT to central position (c) Adjust VR301 to make height to 170 = 4 mm.
Page 8
4-8 Vertical hold (Free-run 52Hz) adjustment:
(a) Disconnect video signal (b) Use frequency counter O lead, measure vertical yoke point,
adjustment VR302 make frequency value to 52Hz.
4-9 Raster adjustment:
(a) Disconnect video signal (b) Set up external brightness VR to maximum , external contrast VR
to maximum
(c) Adjust VR403 have luminance equal to over 55FL
4-10 Brightness check:
(a) Test pattern: full white (b) Set up external brightness and contrast VR to maximum position (c) Over 55FL
4-11 Focus adjustment:
(a) Test pattern: “H” character pattern (b) Set up external brightness and contrast VR to central position (c) Adjust VR402 have central picture and 4 corners to be
distinguished.
Page 9
Page 10
Page 11
Page 12
Page 13
Page 14
Page 15
Page 16
Page 17
Page 18
Page 19
Page 20
Page 21
Page 22
Page 23
Page 24
Page 25
Page 26
10 PARTS LIST
PCB
LOCATION P/N PCB 010-3001-011
RESISTOR
LOCATION P/N LOCATION P/N LOCATION P/N R100 47R 011-0470-227 R221 62R 011-0620-227 R420 47K 011-0473-227 R101 47R 011-0470-227 R222 6K8 011-0682-227 R421 1K 011-0102-227 R102 330R 011-0331-227 R223 1K 001-0102-227 R422 013-0393-221 R103 330R 011-0331-227 R224 2K2 011-0222-227 R423 1K 011-0102-227 R104 75R 011-0750-227 R225 820R 013-0821-222 R424 1K 011-0102-227 R105 75R 011-0750-227 R226 011-0120-327 R425 013-0392-121 R106 47R 011-0470-227 R227 2K2 011-0222-227 R426 330R 011-0331-227 R107 68K 011-0683-227 R228 1K 011-0102-227 R427 1K 011-0102-227 R108 360K 012-3603-207 R229 100K 013-0104-726 R901 470K 011-0474-327 R109 1K 011-0102-227 R300 22K 011-0223-227 R902 3R9 3W 015-0397-122 R110 30K 011-0303-227 R301 011-0433-227 R903 1R 1W 014-0107-221 R111 47R 011-0470-227 R302 1R 013-0107-121 R904 1M3 011-0135-327 R112 72K 012-7202-207 R304 150K 011-0154-227 R905 1M3 011-0135-327 R113 22K 011-0223-227 R305 82K 011-0823-227 R906 47K 5W 015-0473-222 R114 22K 011-0223-227 R306 18K 011-0183-227 R907 10K 5W 015-0103-222 R115 62K 011-0623-227 R307 82K 011-0823-227 R908 3K 013-0302-222 R116 39K 011-0393-227 R308 3K3 011-0332-227 R909 68R 2W 013-0680-221 R118 78K 011-0783-227 R309 4K7 011-0472-227 R910 10R 011-0100-227 R119 75K 011-0753-227 R310 2K7 011-0272-227 R91133R 011-0330-227 R121150R 1W 013-0151-121 R311 3R3 011-0337-227 R912 10R 011-0100-227 R122 1K 011-0102-227 R312 300K 011-0304-227 R913 1R 2W 013-0107-222 R200 75R 011-0750-227 R313 1R5 011-0157-327 R914 27R 012-2707-207 R201 150R 011-0151-227 R400 1K 011-0102-227 R915 33R 012-3307-207 R202 75R 011-0750-227 R401 1K 011-0102-227 R916 2K 011-0202-227 R203 75R 011-0750-227 R402 100K 011-0104-227 R917 4KT 011-0472-227 R204 75R 011-0750-227 R403 1K8 011-0182-227 R918 10K 011-0103-227 R205 270R 011-0271-227 R404 1K2 011-0122-227 R919 1K 011-0102-227 R206 47R 011-0470-227 R405 12K 011-0123-227 R920 5M6 011-0565-227 R207 4K7 011-0472-227 R406 15K 011-0153-227 R921 10R 011-0100-227 R208 430R 011-0821-227 R407 120K 011-0124-227 R923 47R 011-0470-227 R209 470R 011-0471-227 R408 180R 013-0181-121 R924 8K2 012-8201-207 R210 91R 011-0910-227 R409 18K 011-0183-227 R925 560R 011-0561-227 R211 100R 011-0101-227 R410 820R 011-0821-227 R926 91R 011-0910-227 R212 390R 011-0391-227 R411 20R 013-0200-221 R927 5K6 011-0562-227 R213 270R 011-0271-327 R412 82R 011-0820-227 R928 011-0511-227 R214 33K 011-0333-227 R413 15K 011-0153-327 R929 1K 011-0102-227 R215 330R 011-0331-227 R414 680R 011-0681-327 R930 1K 011-0102-227 R216 47R 011-0470-227 R415 390R 011-0391-327 R931 470R 011-0471-227 R217 68R 011-0680-227 R416 82K 011-0823-227 R932 2K6 012-2601-207 R218 82K 011-0823-227 R417 130K 011-0134-227 R933 30K 012-3002-207 R219 15K 011-0153-227 R418 1R 013-0107-121 R936 1K 011-0102-227 R220 47R 011-0470-227 R419 1M2 011-0125-227
EFFECT X-RAY MARK
Page 27
CAPACITOR
LOCATION P/N LOCATION P/N LOCATION P/N C100 47uf 050-4702-251 C309 .1 053-1045-500 C901 .22 070-2246-888 C101 .47uf 050-4792-501 C310 .1 053-1045-500 C903 4n7 071-4727-903 C102 100uf 050-1012-161 C311 47uf 050-4702-251 C904 4n7 071-4727-903 C103 10uf 050-1002-251 C312 .1 053-1045-500 C905 4n7 071-4727-903 C104 .1 053-1045-500 C313 050-2222-105 C906 071-4727-903 C105 .1 053-1045-500 C400 100uf 050-1012-161 C907 150uf 050-1512-905 C106 .001 057-1022-840 C401 .0033 053-3325-500 C908 220uf 048-2212-252 C107.001 053-1025-500 C402 .1 053-1045-500 C909 .01 051-1037-553 C108 1uf 051-1048-170 C403 68pf 052-6805-110 C910 .01 055-1035-933 C200 100uf 050-1012-161 C404 .0047 053-4725-500 C911 470pf 051-4716-814 C201 100uf 050-1012-161 C405 1uf 050-1082-501 C912 2200pf 053-2225-500 C202 270pf 051-2713-110 C406 .0018 056-1825-500 C913 390pf 051-3916-110 C203 100uf 050-1012-161 C407 .1uf 053-1045-500 C914 1000pf 051-1026-110 C204 4.7uf 050-4782-501 C408 100uf 050-1012-161 C915 .1 055-1045-840 C206 10uf 050-1002-841 C409 .001 053-1025-500 C917 .01 055-1035-840 C207 103pf 051-1037-553 C410 .0068 056-6825-883 C918 .01 053-1035-500 C208 103pf 051-1037-553 C411 560pf 051-5616-310 C919 470uf 059-4712-101 C209 100uf 050-1012-161 C412 560pf 051-5616-310 C920 470uf 059-4712-353 C300 050-4712-161 C413 1.8uf 055-1855-889 C921220uf 059-2212-101 C301 .1uf 053-1045-500 C414 .012 056-1235-935 C922 220uf 059-2212-353 C302 220uf 050-2212-161 C415 330uf 050-3312-505 C923 1000uf 059-1022-163 C303 100pf 051-1016-110 C416 .01 051-1037-553 C924 470uf 059-4712-163 C304 051-6816-110 C417 103pf 051-1037-553 C925 .22 055-2245-500 C305 .0018 053-1825-500 C418 1uf 050-1082-861 C926 331p 051-3316-110 C306 .033 053-3335-500 C419 47uf 050-4702-845 C927 .1 055-1045-840 C307 .1 053-1045-500 C420 10uf 050-1002-865 C928 102p 051-1026-410 C308 .15 053-1545-500 C421 390pf 051-3916-110 C929 102p 051-1026-410
IC
LOCATION P/N LOCATION P/N LOCATION P/N IC100 74LS86 111-1008-007 IC300 TDA8172 112-9003-026 IC902 TL431 113-0102-005 IC101 74LS123 111-1002-011 IC400 MC1391 112-8002-015 IC903 4N35 112-1521-001 IC102 74LS138 111-1002-012 IC901 UC3842 112-5002-023
TRANSISTOR
LOCATION P/N LOCATION P/N LOCATION P/N Q100 2SC945 114-0215-046 Q204 2N3904 114-0502-001 Q403 C945 114-0215-046 Q101 C945 114-0215-046 Q205 2SD1609 114-0308-049 Q404 C945 114-0215-046 Q200 2N3904 114-0502-001 Q400 D667 114-0308-052 Q405 2SB857 114-0108-015 Q201 2SA1145 114-0009-003 Q401 C4106 114-0210-034 Q901 114-0210-028 Q202 C945 114-0215-046 Q402 C945 114-0215-046 Q902 A966Y 114-0009-008 Q203 C945 114-0215-046
VR RES
LOCATION P/N LOCATION P/N LOCATION P/N VR200 500R 130-1501-502 VR302 100K 131-1042-012 VR402 2M 131-2050-604 VR300 100K 131-1042-012 VR400 5K 131-5022-012 VR403 500K 131-5042-012 VR301 100K 130-4501-524 VR401 1K 130-2001-524 VR404 100K 130-4501-502
Page 28
DIODE
LOCATION P/N LOCATION P/N LOCATION P/N D100 IN4148 117-0117-005 D203 IN4148 117-0117-005 D904 IN4007 119-1023-010 D101 IN4148 117-0117-005 D204 IN4148 117-0117-005 D905 BA159 119-1024-013 D102 IN4148 117-0117-005 D205 IN4148 117-0117-005 D906 PS104R 119-1023-018 D103 IN4148 117-0117-005 D300 IN4003 119-1023-009 D907 PS104R 119-1023-018 D104 IN4148 117-0117-005 D401 15QF6 119-1520-008 D908 IN4003 119-1023-009 D105 IN4148 117-0117-005 D402 BYT52M 119-1005-014 D909 IN4003 119-1023-009 D106 IN4148 117-0117-005 D403 PS154R 119-1523-020 D910 IN4606 117-0117-005 D107 IN4148 117-0117-005 D404 PS154R 119-1523-020 D911 PS156R 119-1523-021 D109 IN4148 117-0117-005 D405 PS104R 119-1023-018 D912 30DF2 119-3020-012 D110 IN4148 117-0117-005 D406 PS104R 119-1023-018 D913 30DF2 119-3020-012 D112 HZ5C1 118-0508-004 D407 IN4007 119-1023-010 D914 30DF2 119-3020-012 D200 IN4148 117-0117-005 D901 IN4007 119-1023-010 D915 IN4606 117-0117-002 D201 IN4148 117-0117-005 D902 IN4007 119-1023-010 ZD901 118-0508-002 D202 117-0117-005 D903 119-1023-010
BASE
LOCATION P/N LOCATION P/N LOCATION P/N B2 232-0306-010 CRT GND 232-0123-001 L 232-0123-001 B3 232-0606-013 G 232-0123-001 LED 232-0206-005 B4 232-0415-004 G2 232-0123-001 N 232-0123-001 CRT GND 232-0123-001
WIRE
LOCATION P/N LOCATION P/N LOCATION P/N 420-0224-230 420-0504-250 420-1064-200 420-0254-255 420-0514-250 423-4100-310 420-0264-255 420-0534-245 423-6280-270 420-0408-145 420-1014-205 424-0513-300 420-0499-090
TRANSFORMER
LOCATION P/N LOCATION P/N LOCATION P/N T400 503-2013-001 T402 503-4023-001 T902 538-0408-401 T401 503-3021-001 T901 503-1023-201
COIL
LOCATION P/N LOCATION P/N LOCATION P/N L400 537-2007-235 L402 537-6587-145 L902 537-1087-235 L401 538-1000-101 L901 537-3306-226 L905 537-2007-235
OTHER
LOCATION P/N LOCATION P/N LOCATION P/N S901 261-0521-401 SP203 391-0102-001 F901 521-2085-641 381-2000-001 SP204 391-0102-001 604-0003-301 SP201 391-0102-001 SP202 391-0201-002
Page 29
OTHER
LOCATION P/N LOCATION P/N AC SOCKET ASSY 891-0030-001 USER MANUAL 312-0001-003 LED ASSY 891-0040-002 POWER CORD 400-0701-180 BASE ASSY 891-0050-002 SIGNAL CABLE 410-0101-150 CRT 500-5010-103 CARTON 305-1233-001 POLYFORM 460-0001-033 PE BAG 470-0010-001 P E BAG 470-0011-003
Loading...