松下WV-BM990黑白显示器原理图.pdf

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1、SPECIFICATIONS Power Source :220-240 V AC, 50 Hz Power Consumption :Approx. 28 W Screen Size :245 mm (9-5/8) diagonal tube size, 90 deflection. 220 mm (8-11/16) diagonal actual visual size. Horizontal Resolution :800 TV lines at centre Video Input :1.0 Vp-p composite/75 , BNC with Auto Termination V

2、ideo Output :Looped through video input, BNC Horizontal Scanning Frequency :15.625 kHz Vertical Scanning Frequency :50 Hz Sweep Linearity :Horizontal;Less than 5 % Vertical;Less than 5 % Ambient Operating Humidity :Less than 90 % Ambient Operating Temperature :10C - +50C (14F - 122F) Dimensions :221

3、 (W) x 220 (H) x 262 (D) mm 8-11/16 (W) x 8-11/16 (H) x 10-5/16 Weight :5.2 kg (11.5 lbs.) Weight and dimensions shown are approximate. Specifications are subject to change without notice. OPTIONAL ACCESSORY Rack Mount Bracket . WV-Q29E WV-BM990 ORDER NO. AVS0004254C8 POWERVideo Monitor WV-BM 990990

4、 ON OFF V HOLDBRIGHTCONTRAST C 2000 Matsushita Communication Industrial Co., Ltd. A l l r i g h t s r e s e r v e d . U n a u t h o r i z e d c o p y i n g a n d distribution is a violation of law. Video Monitor This service information is designed for experienced repair technicians only and is not

5、designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to se

6、rvice or repair the product or products dealt with in this service information by anyone else could result in serious injury or death. Y WARNING CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE.

7、REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. This symbol warns the user that uninsulated voltage within the unit may have sufficient magnitude to cause electric shock. Therefore, it is dangerous to make any kind of contact with any inside part of this unit. This symbol alerts the user that import

8、ant literature concerning the operation and maintenance of this has been included. Therefore, it should be read carefully in order to avoid any problems. There are special components used in this equipment which are important for safety. These parts are indicated by the ” Y ” mark on the schematic d

9、iagram and the replacement parts list. It is essential that these critical parts should be replaced with manufacturers specified parts to prevent X-radiation, shock, fire, or other hazards. Do not modify the original design without permission of manufacture. IMPORTANT SAFETY NOTICE CONTENTS Major Op

10、erating Controls and Their Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11、2 Location of Test Points and Adjusting Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12、 . . . . . . 5 Conductor View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13、. . . . . . . . . . . . . . . . . . . . . . . . . . 7 Replacement Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1 MAJOR OPERATING CONTROLS AND THEIR FUNCTIONS Video Monitor WV-BMPOWER OFF ON V.HO

14、LDBRIGHTCONTRAST VIDEO INVIDEO OUT q wrty u i e q Power Switch (POWER, ON/OFF) This is a push-push type switch which turns the power of this monitor on and off. Press once (switch remains down (;) to turn on the power of the monitor. Press again (switch comes up (l) to turn off the power of the moni

15、tor. w Power Indicator This indicator is on when the monitors power is turned on. e Vertical Hold Control (V-HOLD) This control is used to lock the vertical position of the picture. r Brightness Control (BRIGHT) Adjusts the picture brightness. Turn this counterclock- wise to increase the picture bri

16、ghtness, and turning the control clockwise has the reverse effect. t Contrast Control (CONTRAST) Adjusts the picture contrast. Turn this counterclockwise to increase the picture contrast, and turning the control clockwise has the reverse effect. y Video Input Connector (VIDEO IN) For input of the co

17、mposite video signal from the out- board device. u Video Output Connector (VIDEO OUT) The video input signal connected to the video input con- nector y is looped through to this connector and termi- nated automatically. i AC Power Cord Plug the power cord to an AC outlet. G Front ViewG Rear View 2 A

18、DJUSTMENT PROCEDURE 1. Test Equipments Required 8The following Test Equipments are required for adjustment of the Video Monitor WV-BM990. 8Video Signal Generator (Crosshatch Signal) 8Monoscope Pattern Signal Generator 8Oscilloscope 8Digital Voltmeter 8Degaussing Coil 8Ceramic Screwdriver 8Electric T

19、orque Driver 2. Disassembling Procedure for the Adjustment 8Referring to Fig. 2-1, remove eight screws that secure the Upper Cover and the Rear Cover. Remove the Upper Cover and the Rear Cover. Fig. 2-1 3. Connection and Setting up for Adjustment 3.1. Connection 8Fig. 3-1 shows the connecting diagra

20、m for adjustment procedure of the WV-BM990. Fig 3-1 Remove eight screws. Upper Cover Rear Cover 8Connect the coaxial cable between Video Input Connector of the WV-BM990 and Video Output Connector of Video Signal Generator. 3.2. Setting Up 8Set the every adjusting VRs to their mechanical center posit

21、ions. 8This adjustment should be done after 20 minutes warm up of the WV-BM990. 4. Adjustment Procedure 8Refer to the Location of the Test Points and Adjusting Controls on the page 4. (1). Freerun Adjustment Test Point:Pin H+ of CN501 (H+)Main Board Adjust:VR501 (H-HOLD)Main Board VR515 (H.PRESET)Ma

22、in Board 8Disconnect all the input signals from the WV-BM990. 8Connect the Frequency Counter to Pin H+ of CN501. 8Fix VR501 (H-HOLD) at its center position. 8Adjust VR515 so that the frequency becomes 15.400 kHz 50 Hz. (2). Cut Off Voltage Adjustment Adjust:VR401 (V-HOLD)Main Board Deflection Coil (

23、DY) VR301 (CONTRAST)Main Board VR302 (BRIGHT)Main Board VR602 (SUB-BRIGHT)CRT Board Observe:Video Monitor Screen 8Supply the Monoscope Pattern signal to the Video Input Connector. 8Adjust VR401 to hold picture vertically. 8Adjust the Deflection Coil so that the edges of the Monoscope Pattern are vis

24、ible in the monitor screen. 8Turn VR301 fully counterclockwise. 8Turn VR302 to its mechanical center position. 8Adjust VR602 so that the Raster just appear. (3). Picture Tilt Adjustment Adjust:Deflection Coil (DY) Observe:Video Monitor Screen 8Supply the Monoscope Pattern signal to the Video Input C

25、onnector. 8Loosen the Deflection Coil Holding Screw as shown in Fig. 4-1. WV-BM990 Video Signal Generator VIDEO IN 3 Fig. 4-1 8Turn the Deflection Coil until the raster becomes straight on the monitor screen. 8Tighten the Deflection Coil Holding Screw carefully. Note: When fixing the Deflection Coil

26、 Holding Screw, push the Deflection Coil to connect to CRT tightly. (4). Centering and Horizontal Size Adjustment Adjust:VR301 (CONTRAST)Main Board VR302 (BRIGHT)Main Board Centering Magnets L501 (H.SIZE)Main Board Observe:Video Monitor Screen 8Supply the Monoscope Pattern signal to the Video Input

27、Connector. 8Fix VR301 and VR302 at their center positions. 8Adjust the Centering Magnets as shown in Fig. 4-1 until the Monoscope Pattern signal comes to the center on the monitor screen. 8Adjust L501 so that the full Horizontal Width becomes plus 6% overscanning. 8Repeat adjusting the Centering Mag

28、nets and L501 until satisfactory. (5). Vertical Height and Vertical Linearity Adjustment Adjust:VR408 (V.SIZE)Main Board VR412 (V.LINE)Main Board Centering Magnets Observe:Video Monitor Screen 8Supply the Monoscope Pattern signal to the Video Input Connector. 8Fix VR301 and VR302 at their mechanical

29、 center positions. 8Adjust VR408 so that the full Vertical Height becomes plus 6% overscanning. 8Adjust VR412 so that the circle portion of the Monoscope Pattern signal becomes nearly a true circle. 8Adjust the Centering Magnets so that the full Horizontal Width and full Vertical Height become the s

30、ame overscanning rate. 8Repeat adjusting VR408, VR412 and the Centering Magnets until satisfactory. (6). Focus Adjustment Adjust:VR601 (FOCUS)CRT Board Observe:Video Monitor Screen 8Supply the Monoscope Pattern signal to the Video Input Connector. 8Adjust the VR601 for the best focus in the monitor

31、screen. (7). Raster Distortion Adjustment Adjust:Deflection Magnets Observe:Video Monitor Screen 8Supply the Crosshatch signal to the Video Input Connector. 8Adjust 8 magnets as shown in Fig. 4-2 so that the raster distortion becomes minimum. Fig. 4-2 8The raster distortion against 8 magnets are as

32、shown in Fig. 4-3. Fig. 4-3 Loosen Deflection Coil Holding Screw. Centering Magnets Deflection Coil Adjust eight magnets. 4 MAIN BOARD (COMPONENT SIDE) VR501 (H-HOLD) VR515 (H.PRESET) VR408 (V.SIZE) VR412 (V.LINE) VR301 (CONTRAST) VR302 (BRIGHT) VR401 (V-HOLD) SW801 (POWER SWITCH) L501(H.SIZE) CN501

33、 CN501 CN601 TP5 TP6 CN302CN301 TP1 TP3 TP2 H+ H V V+ TP7 TP4 REAR SIDE FRONT SIDE VR602 (SUB-BRIGHT) VR601 (FOCUS) CRT BOARD (COMPONENT SIDE) LOCATION OF TEST POINTS AND ADJUSTING CONTROLS MAIN BOARDCRT BOARD 101 750 104 154222 470223 822 102 102 562 181 133 392 153103 820 681 122 101 221 101 392 2

34、72 560 104 102 221 431 273 101 103 121 471 474 223 223 102102 563 103 473 822 333 562 563 202 OPEN 103 103 100 222 823 IC501 391 152 VR401 103101 R423 183 R406 103 103 473 563 122 392 393 122 332 104 VR412 502 R407 2802R422 221 C406 220/16V R409 152 R410 392 103 102 393 104 393 394 154 474 474 104 3

35、34 105 151182 333 400V 393 400V 333 120 680 562 390 683 271153 682 8R2 6R8 5R6 153 152 473 R800 0R56 3W 181471 TP1 TP2 470 IC801 C803 224/100V J801 J802 R808 394 5230 2260 SHORT 9311 H+ K V101 OPENOPEN OPEN OPEN 250V 205 GND 105 R413 1R8 3W R411 6651 D401 501 R403 1242 E101 1 2 3 3652 1% 4121 1% CN3

36、02 VIDEO INPUT CONNECTOR CN301 VIDEO OUTPUT CONNECTOR SW801 POWER SWITCH AC POWER CORD VR301 CONTRAST VR302 BRIGHT VR401 V-HOLD VR408 V.SIZE VR412 V.LINE L501 H.SIZE VR515 H.PRESET VR501 H-HOLD VR602 SUB- BRIGHT VR601 FOCUS Y Y Y Y Y Y Y Y Y YY Y Y Y Y Important safety notice Components Identified b

37、y Y mark have special characteristics for safety. When replacing any of these components, use only manufacturers specified parts. 123456 C B A F801 2A 250V FS2FS1 GRN BLK/BROWN BLUE/ WHT R418 561 0.5W Q502 T501 T502 D501 D506 Q503 Q501 Q504 C407 47/25V Q306 Q307 Q801 PT801 SW801 CN803 CN802 D801 Q30

38、2 Q303 Q304 Q309 Q308 Q301 Q305 Y R W Q Y R W Q Q R U Y W I SCHEMATIC DIAGRAM 5 MAIN BOARDMAIN BOARD CRT BOARD (Component Side View) (Component Side View)(Pattern Side View) (Pattern Side View) DY 123456 C B A IC801 14.0 0 1.3 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 IC501 4.0 6.7 3.8 11.8 5.5 2.0

39、 11.3 5.7 0.6 6.9 4.8 3.5 4.1 2.3 4.1 1.6 Q301 302 303 304 305 306 307 308 309 501 502 503 504 801 B 6.0 2.3 9.2 3.1 11.9 12.4 0.2 2.1 3.5 0.6 0.1 0.6 0 17 C 12.4 9.2 5.8 0 1.0 0.4 3.1 3.5 69.8 10.5 12.3 10.5 0.6 12.4 E 5.3 1.7 9.9 3.6 12.4 12.4 3.1 3.1 3.1 0 0.1 0.6 0 17.6 MAIN BOARD 2. 5 ms/DIV, 1

40、 V/DIV3. 20 s/DIV, 20 V/DIV1. 5 ms/DIV, 5 V/DIV MAIN BOARD Note: The value indicated in the schematic diagram should be read as follows: Multiplier (0 - 5) 2nd. Significant Digit (0 - 9) 1st. Siginificant Digit (1 - 9) For Capacitor: (Except Electrolytic Capacitor and Tantalum Capacitor): 820 B 82 x

41、 10 = 82 pF 102 B 10 x 10 = 1000 pF = 0.001 F 104 B 10 x 10 = 100000 pF = 0.1 F 0 2 4 For Coil: 010B 1 x 10 =1 H 8R2B 8.2 x 10 = 8.2 H 101B 10 x 10 = 100 H 0 2 4 0 1 3 For Resistor: 330 B 33 x 10 = 33 561 B 56 x 10 = 560 123 B 12 x 10 = 12k 0R00 = 0 IC501C4 IC801A3 Q301C2 Q302C2 Q303C2 Q304C3 Q305C2

42、 Q306C2 Q307C2 Q308C3 Q309C3 Q501A5 Q502A5 Q503A4 Q504B4 Q801A3 MAIN BOARD D301C3 D401B4 D402A4 D403B3 D404B3 D409B4 D501A5 D503A6 D504A6 D505B3 D506B4 D801A2 D805A4 IC501B2 IC801C2 Q301A1 Q302B1 Q303B1 Q304B1 Q305A1 Q306B1 Q307B1 Q308B1 Q309B1 Q501B2 Q502B2 Q503B2 Q504B2 Q801C2 MAIN BOARD D301B1 D4

43、01B1 D402C1 D403B1 D404B2 D409A1 D501A2 D503B3 D504B3 D505B3 D506B2 D801C1 D805C1 6 CONDUCTOR VIEW Video Monitor WV-BM Video Monitor WV-BM PACKAGING THT4C0004Pan Head Tapping Screw and Washer Assy XTV3+12CBlazer Head Tapping Screw XSB3+10FXBinding Head Screws XTW3+10GWasher Head Tapping Screws XTB4+

44、12ABinding Head Tapping Screws THT4C0005Pan Head Tapping Screw and Washer Assy XNGB4C002Hexagon Head Nut XTB4+15ABinding Head Tapping Screws XTB4+8FBinding Head Tapping Screw XWC4BFYInternal Toohted Lock Washer XYA4+EF8Binding Head Tapping Screw and Washer Assy XTB3+8FNBinding Head Tapping Screws XT

45、B3+10JFNBinding Head Tapping Screws XYA4+BA20FXBinding Head Tapping Screw and Washer Assy TUC4C0198CWashers 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ScrewsNo.Description Numbers show screws, washers, nuts and etc. 1 M17 M36M31 M41, M42 M49 M49 M50 M45 M46 M18 M22 M20 M21 M13 M12 M14 M11 M4 V101 M1 M7 M19

46、 M4 M4 M2 M35 M16 M8 M8 M23 PT801 E101 M3 M4 M6 M8 M8 M32 M26 M25 PCB2 PCB1 M15 1 2 3 4 8 8 1515 5 4 8 9 10 11 12 13 13 13 WV-BM990 14 14 14 14 7 6 EXPLODED VIEW 7 8 V101 YTXAVB1BM990PCRT Assy PT801 YTLP4C60262SPower Transformer E101 YTSX4C7119HAC Power Cord for WV-BM990/B TSX4C7118HAC Power Cord fo

47、r WV-BM990/G M1TKE4C5601CFront Cover M2TUX4C0149CEarth Metal (R) M3TUX4C0150CEarth Metal (L) M4TUX4C0151CCRT Hook M6TES4C0038CEarth Plate M7TES4C0039CCRT Fix Spring M8TMM81416Wire Clamper (X4) M11TBX4C0089-1CSW Knob M12TKK4C0096-1CLED Lens M13TBX4C0088-1CVR Knob (X3) M14TMM4C0093Wire Clamper (X2) M1

48、8TUX4C0071Wire Fixing Metal M19TXA3A1BM990CRT Knit Wire M20TUC4C0196CBottom Washer M21TKY4C0901CBottom Cover M22YWV5350WB01Rubber Foot M23TMM4C0148Cable Clamp M25TKA4C0003CUpper Cover M26TKC4C0003CRear Cover M31 YTBM4C0699Main Label for WV-BM990/B TBM4C0698Main Label for WV-BM990/G M32 YTQF4C0278Cau

49、tion Label M35 YTQF4C0629Earth Label M36TQF4C0627Video Label PCB1 (RTL)NP4CH0030231Printed Circuit Board Assy IC501UPC1379CIC IC801M5237LIC Q301,3022SD636-QRSTransistor Q303-3062SB641QRSTransistor Q307,3082SD636-QRSTransistor Q3092SC2258Transistor Q5012SC1384QRTransistor Q5022SD1274BTransistor Q5032SC3311AQRTATransistor Q5042SC1740STPSTransistor Q8012SB1299Transistor D301MA165TA5VTDiode D4011N4003TB26Diode D402MA4120HDiod