AOC CM-736 Скачать руководство пользователя страница 19

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CM-736 BLOCK DIAGRAM (SMPS)

+130V

+75V

Vin

SMOOTHED

OUTPUTS

RECTIFIED

POWER

SMOOTHED

TRANSFORMER

SMOOTHED m

_ +27V

+15V

T951

VARIABLE

TRANSFORMER

+7.5V

-22v

+70~150v

VARIABLE

(31K~64K)

OUTPUTS

RECTIFIED

Q901 & Q913

POWER MOS

Q951

POWER MOS

R970

CURRENT

SENSE

Vcc

IC901

P.W.M.

. .

CONTROL

CKT.

T904

O/P

DRIVER

osc CKT.

CONTROL

CKT.

O/P O.V.P.

Vref & O.C.P.

A A <

osc F.B

CKT.

REFERANCE

V O L T A G E

w F.B

H-SYNC
CKT.

1 SENCE

] 39.5V

LINE

FILTER

. .

H-SYNC.

T903

CKT.

H-SYNC.

H-SYNC PULSE

CONTROL

30KHz~65KHz

MANUAL

DEGAUSSING

CKT.

AC INPUT
9OV~264V

Содержание CM-736

Страница 1: ...SERVICE MANUAL M621 CM 736 17 MICRO CONTROLLED COLOR MONITOR ...

Страница 2: ...ICE INFORMATION ONLY EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS LIABILITY FOR CHANGES ERRORS OR OMISSIONS 1 ...

Страница 3: ...14 6 2 CRT PCB LAYOUT 15 6 3 SMPS PCB LAYOUT 15 6 4 SIGNAL PCB LAYOUT 16 7 B L O C K DIAGRAM VIDEO VERT HORI 17 BLOCK DIAGRAM SMPS la 8 TROUBLE SHOOTING G 19 8 1 N o RASTER 19 8 2 A B N O R M A L V I D E O O N C R T S CR E E N 2 0 a 3 A B N O R M A L WHITE E B ALANCE 2 0 8 4 4 NO BLANKING WORK 21 a 5 H OSC DEF HV V C I R C U IT FA ULT 21 B 6 F v CONVERTER AND ASSOCIATED CIRCUIT 2 2 a 7 U N S T AB ...

Страница 4: ...0 26mm 0 28mm Non Glare Screen anti static VLMF OPTION 90 Degree 300 10 mm X 225 15 mm External Adjustable Unlimitted Color Depend on Interface Card and Software Pro gram Up to 1280 X 1024 125 MHz 3 dB R G B Analog 0 7 Vpp or 1 0 Vpp 75 ohm H V Seperated TTL or H V Composite TTL or Sync on Green 0 3 Vpp for Video 0 7 Vpp and 0 43 Vpp for Video 1 O Vpp AC 9OV 264V 50Hz 60Hz Auto Range 130W Max 5 to...

Страница 5: ... method for current leakage is described as follow a Plug the AC line cord directly into rated AC outlet do not use a line isolation transformer during this check b Use an AC voltameter having 5000 ohms per volt or with more sensitivity in the following manner Connect a 1500 ohms 10 Watt resistor paralleled by a O 15mfd AC type capacitor between a known good earth ground water pipe conduit etc and...

Страница 6: ... chassis type The maximum operating HV specified for the chassis used in this monitor is 26KV 1KV with a line voltage of 120 24OV AC Higher voltage may also increase possibility of failure in HV supply It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the monitor that could cause a rise in high voltage or operating suppl...

Страница 7: ... diagram shown above rear view of exterior shows proper hookup location of inlet socket marked as 0 in the diagram Connect the signal cable terminals One end to the monitor the other end to the computer and or other signal source Please don t connect BNC type and D SUB type cables simultaneously The input level 0 7V or 1 OV marked as Q in the above diagram is determined by the installed display ca...

Страница 8: ...C ANALOG SIGNAL 11 GND 12 NC 13 H SYNC 14 V SYNC 15 NC BNC ANALOG INPUT oooc o CONNECTOR R G SYNC SYNC ON GREEN RED H V SYNC ON GREEN COMPOSITE SYNC SEPARATE SYNC RED RED GREEN GREEN B BLUE BLUE BLUE H HV H V SYNC H SYNC V V SYNC means NO CONNECTION H means HORIZONTAL V means VERTICAL H V means COMPOSITE SYNC 7 ...

Страница 9: ...VERTICAL PLACEMENT OF THE PICTURE mm 11 12 V SIZE ADJUSTS THE V SIZE HEIGHT OF THE PICTURE DEGAUSS 13 DEGAUSSING IMPROVES AND MAINTAINS OVERALL PICTURE PURITY 4 2 Digital Features 1 2 This monitor has adapted an advanced CPU to control the H CENTER the H SIZE the V CENTER the V SIZE and it will auto memory the image features whenever the user changed them This monitor includes fourteen sets of fac...

Страница 10: ... 11 886 10 565 0 079 1 004 POSITIVE POSITIVE 37 86KHz 9 800 x 600 I 26 40 20 00 3 20 2 10 16 579 15 840 0 106 0 634 x X 37 879KHz 10 1024 x 768 20 662 15 542 2 06 2 521 16 654 15 951 0 124 0 475 X X 48 399KHz 8514A 11 NON INTERLACE 20 651 15 667 2 303 1 251 13 754 12 432 0 124 0 475 x X 48 432KHz VESA 12 17 707 13 653 1 813 1 920 14 272 13 599 0 106 0 478 X X 56 476KHz 1024 4 768 13 64K 15 686 11 ...

Страница 11: ...ENTS NO FUNCTION 1 B 130V ADJ 2 B 39 5V ADJ 3 Fail Safe 9 3V ADJ 4 F V ADJ 12 5 V ADJ 5 F V ADJ 1OV ADJ 6 Cathode Cutoff 25V ADJ 7 Free Running 57K 8 Free Running 35K 9 Raster Centering ADJ 48K 10 Pincushion Phase 11 Pincushion Gain 12 Vertical Linearity 13 White Balance of Raster 14 White Balance of Bright 15 Focus ADJ 16 H V Limit LOCATION DESIGNATION V R900 VR960 VR805 VR801 VR603 VR701 VR802 V...

Страница 12: ...OVES AND MAINTAINS OVERALL PICTURE PURITY 5 4 ALIGNMENT PROCEDURES Adjustment Condictions and Precautions 1 2 3 Power supply voltage AC 90 264V 50 60 Hz Warm up time The display must be power ON for at least 20 minutes before starting alignments This is especially critical in color temperature and white balance adjustments Signals reference the front detail specifications and timing table Video re...

Страница 13: ...3 Free Running 1 Timing Model 2 57K Connect the pin between TP801 and TP802 adjust VR802 till the image are clear and not slanting to left or right 2 Timing Mode 4 35K Connect the pin between TP801 and TP802 adjust VR803 till the image are clear and not slanting to left or right 4 RASTER CENTERING Conditions a Set the H size VR in Min position b Set the timing in Mode 11 48 3K Adjust the VR810 til...

Страница 14: ...just VR405 and set the black level in 92 96 VDC Set the image in color bar pattern and has the brightness VR in Min contrast VR in Max position Adjust VR402 let the amplitude peak to peak to be 45 Vp p Disable the video signal Use a color analyzer set brightness to Max position adjust white balance of raster Fix VR405 adjust VR404 VR406 till the white balance of raster is Y 1 8 2 7 F L y 311 10 x ...

Страница 15: ...6 PCB LAYOUT 6 l MAIN PCB LAYOUT ...

Страница 16: ...6 2 CRT PCB LAYOUT L01 6 3 SMPS PCB LAYOUT ...

Страница 17: ...6 4 SIGNAL PCB L A Y O U T 16 ...

Страница 18: ...r r r 1I I I I I I I g i m I lH I I L I I I I I I I I I I I I I I 1 1 I I I 2 l 2 I I I I _ _ J I5 2 8 I I 17 ...

Страница 19: ...150v VARIABLE 31K 64K OUTPUTS RECTIFIED SMO THED Q901 Q913 POWER MOS L rs Q951 r POWER MOS R970 CURRENT ______ SENSE CS I 1 Vcc F BT IC901 P W M w CONTROL CKT Yx T904 A O P DRIVER osc CKT CONTROL CKT O P O V P 1 Vref O C P A A osc F B CKT REFERANCE VOLTAGE w F B H SYNC CKT 1 SENCE 39 5V LINE FILTER 7 I H SYNC T903 Ix o f CKT 0 H SYNC H SYNC PULSE CONTROL 30KHz 65KHz MANUAL DEGAUSSING CKT AC INPUT ...

Страница 20: ...SE OF HIGH VOLTAGE OPEARATION GENERATED AT POWER SW ON OR STATIC ELECTRICITY CHECK H OSC NG l H DEF HV CIRCUIT OK CHECK 15V 7 5V LINE 1 SEE ITEM 5 NG OK V CHECK CRT FILAMENT VOLTAGE 6 3V L NG OK TURN THE SCREEN VR TO RIGHT OK CHECK SCREEN G2 1 VOLTAGE G2 VOLTAGE RANGE 550V 700V CB3B OR FBT TB04 FAILURE CRT FAILURE OR ASSOCIATE0 CIRCUIT TO VIDEO 19 ...

Страница 21: ... ON THE SIGNAL BRD SCREEN VOLTAGE 8 3 ABNORMAL WHITE BALANCE ABNORMAL WHITE BALANCE V READJUST WHITE BALANCE IC401 IC402 VR401 VR402 VR403 VR404 VR405 VR406 OR ASSOCIATED OR ASSOCIATED CIRCUIT FAILURE CIRCUIT FAILURE CB38 OR T804 OR CRT FAILURE CRT FAILURE 2o ...

Страница 22: ...703 ON CRT BOARD Q702 8 5 H OSC DEF HV CIRCUIT FAULT CHECK HV PROTECTOR THE HIGH VOLTAGE PROTECTOR FOR OPERATION CIRCUIT MAKES AN AUDIBLE NOISE DURING OPERATION YES H V PROTECTOR FAILURE VR805 0804 ZD804 NO SW REG FAILURE SEE ITEM 8 MEASURE ON THE MAIN BOARD POINT 0802 AND 0803 BASE YES t Q804 QBlO NO D806 DB19 IC802 AND ASSOCIATED CIRCUIT FAILURE _ _ 21 ...

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