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Philips 201B4 M25P Service Manual
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Philips 201B4 M25P Service Manual

21" auto scan colour monitor
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21" Auto scan Colour Monitor
DDC/Power saving//TCO
Description
Important Safety Notice . . . . . . . . . . . . . . . . . .. 2
Technical Data. . . . . . . . . . . . . . . . . . . . . . . . .. .3
Front control . . . . . . . . . . . . . . . . . . . . . . . . .. . .4
OSD m enu t ree . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OSD Adjustment s . . . . . . . . . . . . . . . . . . . . . .. .6~12
Trou ble sho oti ng . . . . . . . . . . . . . . . . . . . . . . . . . 12
Lock/Unlock,Factory mode & Service mode . . 13
Warning and Note s . . . . . . . . . . . . . . . . . . . . . .. 14
Mechanical Instructions . . . . . . . . . . . . . . . . . .. 15
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . .. .16
DDC DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 17
DDC Instructions . . . . . . . . . . . . . . . . . . . . . .. . .
Electrical Adjustments . . . . . . . . . . . . . . . . . . ..
Safety T est Requirements (Hipot & Ground). . . 26
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . .. 27
ANY PERSON A TTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC
EQUIPMENT CONTAINING HIGH VOLT AGES.
CAUTION: USE A SEPARA TE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING.
www.electronicsrepair.net

TABLE OF CONTENTS

Page
Video(A2) Schematic Diagram . . . . . . . . . . . . . 28
Video PCB (A2) . . . . . . . . . . . . . . . . . . . . . . . .. .29
Terminal(A1) Schematic Diagram & PCB (A1). 30
Deflection(B) Schematic Diagram. . . . . . . . . . . 31
PCB (B ,C) .. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 32
Power Board(Diagram C) & MHR Panel(E) . . . 33
Key controls and Panel PCB(D). . . . . . . . . . . ..34
Repair Tips . . . . . . . . . . . . . . . . . . . . . . . . . .. ..35
Exploded View . . . . . . . . . . . . . . . . . . . . . . . .. ..36
Recommended Parts List. . . . . . . . . . . . . . . . . .37
Spare Parts List. . . . . . . . . . . . . . . . . . . . . . .. .
18~22
Repair flow char t . . . . . . . . . . . . . . . . . . . . . . .. 42~49
23~25
General Product Specification. . . . . . . . . . . . . 50~80
General Troubleshooting Guide . . . . . . . . . . . 81~103
SAFETY NOTICE
Chassis : M25P
201B4 M25P
201B 40/00C
Horizontal frequencies
30 - 115 kHz
Page
38~41
3138 106 10205

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Summary of Contents for Philips 201B4 M25P

  • Page 1: Table Of Contents

    21" Auto scan Colour Monitor Chassis : M25P 201B4 M25P 201B 40/00C DDC/Power saving//TCO Horizontal frequencies TABLE OF CONTENTS 30 - 115 kHz Description Page Description Page Important Safety Notice ....2 Video(A2) Schematic Diagram .

  • Page 2: Important Safety Notice

    Consequently, Philips has not undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not recommended by Philips must first satisfy himself thoroughly that neither his safety nor the safe operation of the equipment will be jeopardized by the service method selected.

  • Page 3: Technical Data

    Yellow Suspend Blanked 97 % < 2 W Blanked Amber < 2 W 97 % This monitor is Energy Star compliant .As an ENERGY STAR Partner, PHILIPS has determined that this product meets the ENERGY STAR guidelines for energy efficiency.
  • Page 4 Installation 201B4 M25P Go to cover page Front View Rear View Power button switches your monitor on. OK button which when pressed will take you to the OSD controls Contrast hotkey. When the UP arrow is pressed, the adj ustment D-Sub Port - Attach controls for the CONTRAST will show up.

  • Page 5: Osd M Enu T Ree

    OSD menu tree structure 201B4 M25P Go to cover page The OSD Tree Below is an overall view of the structure of the On-Screen Display. You can use this as reference when you want to later on work your way...

  • Page 6: Osd Adjustment

    OSD Adjustments 201B4 M25P Go to cover page LANGUAGE The OSD Controls The ON SCREEN DISPLAY shows its settings in one of five languages. The default is English, but you can select French, Spanish, German, or Italian. BRIGHTNESS 1) Press the button on the monitor.
  • Page 7 OSD Adjustments 201B4 M25P Go to cover page ZOOM 3) Press the button. The ADJUST HORIZONTAL window appears. ADJUST POSITION should be highlighted. ZOOM increases or decreases the size of the images on your screen. To adjust the ZOOM follow the steps below.
  • Page 8 OSD Adjustments 201B4 M25P Go to cover page 2) Press the button until ADJUST SHAPE is highlighted. 2) Press the button until ADJUST VERTICAL is highlighted. 3) Press the button. The ADJUST SHAPE window appears. ADJUST 3) Press the button. The ADJUST VERTICAL window appears.
  • Page 9 OSD Adjustments 201B4 M25P Go to cover page Smart Help After returning to MAIN CONTROLS . . . 7) When the trapezoid is adjusted, press the button to highlight PARALLELOGRAM or press the button to return to the ADJUST ...to continue to ADJUST SIDE ANGLES, start with step 5 under ADJUST SIDE ANGLES and follow the directions.
  • Page 10 OSD Adjustments 201B4 M25P Go to cover page 4) Press the button to highlight 9300K for GENERAL USE, 5) Press the button. The ROTATE IMAGE window appears. ROTATE 6500K for GAMES, or USER PRESET. should be highlighted. 5) Once you have highlighted GENERAL USE or GAMES, press the button to confirm you selection and return to the MAIN CONTROLS window.
  • Page 11 OSD Adjustments (Continued) 201B4 M25P Go to cover page 4) Press the button to select YES or NO. NO is the default. 4) Press the button. The ADJUST MOIRE window appears. YES returns all settings to their original factory adjustments.

  • Page 12: Trou Ble Sho Oti Ng

    OSD Adjustments (Continued), Troubleshooting 201B4 M25P Go to cover page DEGAUSS Monitor Specific Troubleshooting EXTRA CONTROLS is a set of three features, including DEGAUSS. Self-Test Feature Check (STFC) Degaussing removes electromagnetic build up that may distort the color Your monitor provides a self-test feature that allows you to check on your screen.
  • Page 13 Lock/Unlock, Factory Mode, Burn In, Service Mode 201B4 M25P Go to cover page To access factory mode Front Control 1. Turn off monitor (don't turn off PC) 2. Press " " and " " simultaneously on the front control panel,then press "...

  • Page 14: Warning And Notes

    201B4 M25P Warning and Notes Go to cover page Warnings Notes 1. Safety regulations require that the unit should be returned 1. The direct voltages and waveforms are average voltages. in its original condition and that components identical to They have been measured using the Service test software the original components are used.

  • Page 15: Mechanical Instructions

    201B4 M25P Mechanical Instruction Go to cover page 0. Location of the panel 0.1 Main panel (1160) 0.2 Video panel (1161) 1. General To be able to perform measurements and repairs on the "circuit boards", the monitor should be placed in Service Position (fig.

  • Page 16: Wiring Diagram

    Wiring Diagram 201B4 M25P Go to cover page...
  • Page 17 Hex Data of DDC2B 201B4 M25P Go to cover page ********************************************************************** Standard Timing Identification #7 EDID log file Horizontal active pixels : 1920 ********************************************************************** Aspect Ratio : 4:3 Vendor/Product Identification Refresh Rate : 75 ID Manufacturer Name : PHL ID Product Code : 0009 (HEX.)

  • Page 18: Ddc Data

    DDC Instructions 201B4 M25P Go to cover page 1. General 3. Pin assignment DDC Data Re-programming A. 15-pin D-Sub Connector In case the main EEPROM with Software DDC which store all factory settings were replaced because a defect,repaired monitor the serial numbers have to be re-programmed.
  • Page 19 DDC Instructions (Continued) 201B4 M25P Go to cover page 4. Configuration and procedure 3. At the submenu, type the letter of your computer's floppy disk drive followed by :EDID301 (for example, A:\EDID301, as shown in Fig. 5). There is no Hardware DDC (DDC IC) anymore. Main EEPROM stores all factory settings and DDC data (EDID code) which is so called Software DDC.
  • Page 20 DDC Instructions (Continued) 201B4 M25P Go to cover page Re-programming EEPROM (Software DDC) 4. Click icon (Read EDID function) to read DDC EDID data from monitor. The EDID codes will display on screen as shown in Fig. 13. Step 1: After initialize alignment box, connecting all cables and box as shown in Fig.
  • Page 21 DDC Instructions (Continued) 201B4 M25P Go to cover page Step 5: **Configuration Setup & Enter Factory Mode ** Step 6: Write DDC data for "write EDID data" Click (Write EDID) icon from the tool bar to write DDC data. Bring up "Writing 0%~100%, ready" a progressing bar on the left...
  • Page 22 DDC Instructions (Continued) 201B4 M25P Go to cover page Step 9: Load DDC data Note 2 : In Factory Mode: Read/Write DDC data Before Read/Write EDID code, please confirm that the Click from the tool bar. Software DDC only was enabled as shown in Fig. 23.

  • Page 23: Electrical Adjustments

    Electrical Adjustments 201B4 M25P Go to cover page 0. General - Connect a "high-voltage voltmeter" between the high- voltage connection of the picture tube and earth. When carry-out the electrical settings in many cases a video - Turn on the power.
  • Page 24 * Use color-analyzer (Minolta CA-100) to adjust R/G/B cutoff and D CONVERGENCE NS PURITY Gain. EXIT OSD R/G/B cut-off and R/G/B gain can be accessed (for Philips CRT), with initial data: Fig. 2.2 9300 K R cutoff = 62%, R gain = 71% (I C) (for example: 152 is value of "BIAS R")
  • Page 25 Electrical Adjustments (Continued) 201B4 M25P Go to cover page 8. Focus adjustment Apply a signal of " @ " character. at 64 kHz/60 Hz mode set the brightness to mid-position , contrast to max - position and adjust the focus for optimal sharpness in the area within 2/3 from the screen center.
  • Page 26 Safety test requirements 201B4 M25P Go to cover page All units that are returned for service or repair must pass the 3. Equipments and Connection original manufactures safety tests. Safety testing requires both Hipot and Ground Continuity testing. 3.1. Equipments...

  • Page 27: Block Diagram

    201B4 M25P Block Diagram Go to cover page FUNCTION BLOCK OF COCA+ 201B4 M25P...
  • Page 29 Waveform (A) A7 7782-B A1 7701-6 A3 7705-1 1 V/div AC 0.5 V/div AC 50 V/div AC 10 uS/div 10 uS/div 5 mS/div A3 7705-5 A1 7701-8 50 V/div AC 1 V/div AC 10 uS/div 5 mS/div A4 1710-12 A1 7701-10 1 V/div AC 50 V/div AC 10 uS/div...
  • Page 30 Go to cover page...
  • Page 31 201B4 M25P Go to cover page GRID BOARD GRID BOARD 3718 A1 3842 B1 3844 A6 7746 B2 7727 C6 GRID BOARD 3719 C7 GRID BOARD REF LABEL SIDE REF LABEL SIDE 3719 A2 3843 B1 3845 A6 7747 B2...
  • Page 34 Go to cover page...
  • Page 35 201B4 M25P Go to cover page B8 7421-17 B22 7502-B B38 7301-33 B1 7404-14 B30 7543-B B47 7672-D B15 7422-E 2 V/div AC 0.5 V/div AC 5 V/div AC 100 V/div AC 100 V/div AC 2 V/div AC 5 V/div AC...
  • Page 37 9621 B5 3365 B6 GRID BOARD GRID BOARD 2461 D6 3106 E3 3625 B5 6140 C4 7505 A5 3471 E7 9901 C5 3366 B6 REF LABEL SIDE REF LABEL SIDE 2463 E7 3108 E4 3627 B5 6143 D4 7541 C2 3472 D6 9902 D6 3367 B6...
  • Page 38 Go to cover page...
  • Page 39 MHR Schematic Diagram 201B4 M25P Go to cover page C8 5130-12 C1 5130-1 10 V/div AC 10 V/div AC 5 mS/div 2 uS/div C2 5130-3 C11 7130-4 5 V/div AC 5 V/div AC 2 uS/div 5 mS/div C3 5130-5 C12 7130-3 0.5 V/div AC...
  • Page 41 GRID BOARD GRID BOARD GRID BOARD # REF LABEL SIDE # REF LABEL SIDE # REF LABEL SIDE # ____ _____ _________ # ____ _____ _________ # ____ _____ _________ 1891 A2 1891 A4 2891 A4 1892 A2 1892 A4 2892 A4 1893 A2 1893 A4...
  • Page 42 Repair Tips 201B4 M25P Go to cover page 0. Warning - Locate the SMD on the solder lands by means of tweezers and solder the component on one side. Ensure that the component is All ICs and many other semi-conductors are susceptible to Positioned correctly on the solder lands (see Fig.2A).

  • Page 44: Description

    Recommanded Parts List 201P4 M25P Go to cover page Model : 201B40/00C Model : 201B40/74 ITEM CODE NUMBER DESCRIPTION ITEM CODE NUMBER DESCRIPTION 3138 52441 FRONT CABINET ASSY(201B4) 3138 61361 CARTON 3138 98472 BACK COVER ASSY (201B4) 1053 3138 76421 MAINS CORD(120V) 3138 98481...

  • Page 45: Spare Parts List

    Spare Parts List 201B4 M25P Go to cover page Parts List 2131 202203100082 ELCAP KM 250V S 1U PM20 CTV : 201B40/00C 2613 203803513504 ELCAP RGA 50V S 4U7 PM20 2133 202203100067 ELCAP GL 1V S 220U PM20 2621 222234741473...
  • Page 46 Spare Parts List (Continued) 210B4 M25P Go to cover page 3555 319802151030 RST SM 0805 10K PM5 COL 3337 213810113222 RST CRB CFR-12 A 2K2 PM5 3556 232273061202 RST SM 0805 RC11 2K PM5 3338 213810113222 RST CRB CFR-12 A 2K2 PM5 3340 213810113101 RST CRB CFR-12 A 1R PM5 3566 213810113472 RST CRB CFR-12 A 4K7 PM5 5101 313816873611 LINE FILTER (HJC-K8259)
  • Page 47 Spare Parts List 201B4 M25P Go to cover page 1161 Video PCB 3711 319802151230 RST SM 0805 12K PM5 COL 3712 319802151020 RST SM 0805 1K PM5 COL 3713 319802151010 RST SM 0805 1R PM5 COL 3714 319802151010 RST SM 0805 1R PM5 COL...
  • Page 48 Spare Parts List (Continued) 210B4 M25P Go to cover page 5701 242253597069 IND FXD SP0305 A 4U7 PM10 1162 Terminal PCB 5702 313817876911 COIL 0.12UH PM10 1165 313817861951 MHR PCB 5703 242254944197 IND FXD 0805 EMI 1MHZ 220R 5704 313816879121 FERRITE BEAD SMD (FB423226T- 5721 313817876911 COIL 0.12UH PM10 2001 202202000697 ELCAP SEA 10V S 220U PM20 5722 242254944197 IND FXD 0805 EMI 1MHZ 220R...

  • Page 49: Repair Flow Char

    Repair Flow Chart 201B4 M25P Go to cover page A. Power Supply Failure 1. Sympton : check 7121 pin1 check 7121 check 7121 check 7121 no startup sound pin 3 pin4 Waveform right? pin2 LED light off check check check...
  • Page 50 Repair Flow Chart 210B4 M25P Go to cover page rough check for R, G, B B.Video 1. video input~ 0.7V check blanking Repair Flow 2. 7704video output ~2.5V 7421 pin16 3. 7711 video output~ 35V swing 1.Sympton : (with white pattern) check heater check check...
  • Page 51 Repair Flow Chart 201B4 M25P Go to cover page C. Horizontal deflection output repair flow : check B+ Control check B+ Control 1. Sympton : check B+ Control without 7421 base 7541 base 7422,7423 base H-deflection. check B+ Control check...
  • Page 52 Repair Flow Chart 201B4 M25P Go to cover page basic check D. Vertical Deflection Failure +15/-15V Sympton : check check one horizontal line 3578,3580 +15V,3569,6567 V_size is abnormal good good? too large/small (small) replace replace 3569,6567,7567 3578,3580,7567 check 7567 check...
  • Page 53 Repair Flow Chart 201B4 M25P Go to cover page check cpu pin6=5V E. CPU Basic Check pin9/pin8=12MhZ check list pin12/pin31=gnd check pin4 duty cycle of 4. H-linearity pwm from 0% to 100% check pin2 duty cycle of 2. H-Centering pwm from 0% to 100%...
  • Page 54 Repair Flow Chart 201B4 M25P Go to cover page check 22. Degauss active=hi no active=low check check 5, Reset 2304/3307 from 5V to 0V check duty cycle of 37. Brightness pwm from 0% to 100% check duty cycle of 4. Rotation...
  • Page 55 Repair Flow Chart 201B4 M25P Go to cover page Basic check F. TDA4856 Vcc=pin10=12V Vcc > 9V Check List gnd =pin7=pin25=0v during startup 1. HFLB pin16 if no exist (from H.defl) CLBL=hi a pin3 amplify pin5 and it compare to pin4 inhibit pin6 output b.
  • Page 56 Repair Flow Chart 201B4 M25P Go to cover page Hunlock pin is floating while pll1(pin26) is 17. Hunlock unlock in searching mode 18. IIC SCL = hi initial fail could be these of IC 19 IIC SDA = hi 7421,7701,7781,7336...

  • Page 57: General Product Specification

    . FLAT SQUARE TUBE TO REDUCE LIGHT REFLECTION . POWER MANAGEMENT CAPABILITY . LOW EMISSION TCO 99 . MOIRE' CANCELLATION . AUTO CALIBRATION FUNCTION . sRGB 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 58 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page CONTENTS Foreword Product profile Scanning frequencies Video dot rate Power input Power consumption Dimensions Weight Functions Ambient temperature 2.10 Regulatory compliance (SAFETY, EMI/EMS) Electrical characteristics Interface signals Interface 3.2.1 Cable 3.2.2 Adaptor 3.2.3...
  • Page 59 Display disturbances from external environment Display disturbances to external environment 6.4.1 Ionization radiation Reliability Mean time between failures Quality assurance requirements Acceptance test Serviceability 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 60 1920x1440/75Hz non-interlaced. 2.0 PRODUCT PROFILE This display monitor unit is a complete color display monitor enclosed in PHILIPS global styling cabinet which has an integrated tilt and swivel base. 2.1 CRT Type NR.
  • Page 61 TTL level, input impedance 2k2 ohm Positive/Negative Interface 3.2.1 Cable The input signals are applied to the display through a detachable shielded cable. 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 62 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page Length : 1.5 m +/- 50 mm (detachable) Connector type : 15 pin D-Sub male to 15 pin D-Sub male, blue IBM PS/2 standard (3 rows) with DDC 2B pin assignments pin assignments : pin no.
  • Page 63 : pin no 15 Pin D-standard RED GND RED VIDEO COMPOSITE SYNC SYNC GND GREEN VIDEO GREEN GND BLUE VIDEO BLUE GND 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 64 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page 3.2.3 Software control functions v ia OSD/control - Adjustable functions: Main Controls Language Zoom Adjust horizontal Adjust vertical Adjust shape Adjust color Reset to factory settings Extra Controls Close Main Controls...
  • Page 65 3.3.2 Factory preset timings The factory settings of size and centering are according to the reference timing charts ( see fig-8, fig-9 ) 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 66 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page MODE NO. RESOLUTION 640 x 480 720 x 400 640 x 480 640 x 480 Dot clock(MHz) 25.175 28.321 31.500 31.500 31.469 kHz 31.468 kHz 37.500 KHz 37.861 kHz A ( us ) 31.778...
  • Page 67 S ( ms ) 0.054 0.017 0.015 0.015 SYNC. H/V - / - + / + + / + + / + POLARITY SEP . SYNC 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 68 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page MODE NO. RESOLUTION 1024 x 768 1152 x 870 1600 x 1200 1280 x1024 Dot clock(MHz) 94.500 100.000 162.000 135.00 68.677 kHz 68.681 kHz 75.000 kHz 79.976 kHz A ( us ) 14.561...
  • Page 69 11.785 S ( ms ) 0.01 0.01 0.008 0.009 SYNC. H/V + / + + / + + / + + / + 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 70 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page MODE NO. RESOLUTION 1280x1024 1600x1200 Dot clock(MHz) 202.815 254.446 115.236kHz 115.238kHz A ( us ) 8.678 8.678 B ( us ) 0.710 0.692 C ( us ) 1.183 1.195 D ( us ) 6.311...
  • Page 71 Yellow Pulse No Pulse < Yellow No Pulse No Pulse < Yellow Compliant with TCO99 power saving requirement EPA energy star requirement E2000 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 72 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page Display identification In accordance with VESA Display Channel Standard and having DDC 2B capability Visual characteristics Test conditions Unless otherwise specified, this specification is defined under the following conditions. (1) Input signal: As defined in 3.3, 1024 x 768...
  • Page 73 V-shift range : total 15 mm. Display dimension stability Due to brightness 1.0 % Due to aging 1.0 % Due to mains voltage 1.0 % Dynamic < 1mm 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 74 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page 4.10 Picture tilt 1mm (see Fig. 3) User adjust range for tilt : 1 deg. min. 4.11 Image non-linearity Horizontal: Max. - Min. x 100 % - 31.5 KHz) Max. + Min.
  • Page 75 Mechanical characteristics Controls Front side - AC power switch - OSD function key Rear - D- sub / BNC - Power cord socket 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 76 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page 4.21 Tapping test No interference does disturb the monitor picture during tapping test with a rubber hammer. 4.22 Distance between two monitors Two monitors of the same monitor type which were conducted with different Modes or frequencies, don't show any inference in a distance down to 25cm.
  • Page 77 G , < 3 msec , 6 shocks Ref.OEM spec *G value measurement filter:330Hz #Exclude CRT impurity 2 sets (Only for reference) TOTAL : 10 sets 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 78 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page Display disturbances from ex ternal environment According to IEC 801-2 for ESD disturbances Display disturbances to ext ernal environment 6.4.1 Ionizatic radiation Completely fulfilled Internati onal Commission of Radiological Protection (ICRP) requirement 0.5 mR/hrs.
  • Page 79 201B4 M25P GENERAL PRODUCT SPECIFICATION Go to cover page FIG-1 IM AGE D IMEN SION 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 80 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page |A-B| AND |C-D| < 6 mm FIG-2 IMAGE CENTERING 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 81 201B4 M25P GENERAL PRODUCT SPECIFICATION Go to cover page 392 mm FIG-3 IMAGE ROTATION 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 82 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page A = B = 2.5 mm FIG-4 IMAGE GEOMETRY 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 83 201B4 M25P GENERAL PRODUCT SPECIFICATION Go to cover page ZONE-B ZONE-A FIG-5 BRIGHTNESS AND CONTRAST MEASUREMENT AREA 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 84 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page ZONE B ZONE A ZONE C 392 mm FIG-6 MISCONVERGENCE 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 85 GENERAL PRODUCT SPECIFICATION Go to cover page 1 BYTE = 8BITS LINE HEX.DATA 0 0 0 0 Fig 7 CHARACTER FORMAT FOR FOCUS CHECK 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 86 GENERAL PRODUCT SPECIFICATION 201B4 M25P Go to cover page SEPARATE SYNC. VIDEO HORIZONTAL VIDEO VERTICAL COMPOSITE SYNC. VIDEO HORIZONTAL FIG-8 TIMING CHART -1 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...
  • Page 87 GENERAL PRODUCT SPECIFICATION Go to cover page VIDEO VERTICAL COMPOSITE SYNC. & VIDEO ( SYNC. ON GREEN ) HORIZONTAL VERTICAL FIG-9 TIMING CHART -2 21" AUTO SCAN CMTR TYPE : 201B40/00C-M25P-201B4 8639 000 11832 BRAND : PHILIPS 2002-01-23 ALEX CHEN 2002-01-23...

  • Page 88: General Troubleshooting Guide

    General Troubleshooting Guide 201B4 M25P Go to cover page General Troubleshooting Guide No Display, Unstable Picture/ but LED is ON Picture Flickers or LED is amber (yellow) H/V Rolling, Monitor drivers H/V Sync. (inf file) Picture too bright Focus Picture too dim Degaussing Picture distortion No Power /...
  • Page 89 General Troubleshooting Guide 201B4 M25P Go to cover page NO DISPLAY, but LED is ON or LED is amber(yellow) Checkpoint: 1. No Macintosh adaptor attached to the plug of signal cable if using the IBM PC 2. A symptom of no color on models equipped with the Plug & Plug feature (DDC) may be seen when these monitors are connected to a NON-DDC Host or Computer.
  • Page 90 General Troubleshooting Guide 201B4 M25P Go to cover page Continued Green Amber Amber? or Green? Make sure the correct signal is input. Make sure of the state of the computer (Turn on). Press the Is the ATTENTION keyboard or operate the mouse. picture displayed? For example: Is picture displayed...
  • Page 91 Philips' monitors build in VESA DDC2B feature to support Plug & Play requirement for Windows 95/98/2000/Me . You can install the information file ( .inf) in order to select your Philips monitor from "Monitor" dialog box in Windows 95/98/2000/Me to activate Plug & Play application. The installation procedure based on...
  • Page 92 During normal viewing conditions of a monitor, Focus at center of the screen should be sharper than the edges of the screen. However, focus on the edges should still display legibly at the Philips recommended resolution and refresh rate for all Philips monitor sizes. Does it cause by...
  • Page 93 This is what stops the degauser, and this devices resistance will decrease as it cools back off enabling the degause to operate again. This is an intentional design and is a industry standard, not just Philips. A nearby magnetic field may magnetize the CRT.
  • Page 94 General Troubleshooting Guide 201B4 M25P Go to cover page Tip : ***** The best way to understand "Image control features (by "On Screen Display" or "Front Control Knob") is to minimize and maxmize each control feature while viewing a full image on the screen. By Picture distortion performing this, the customer will immediately understand: (Geometry)
  • Page 95 General Troubleshooting Guide 201B4 M25P Go to cover page Unstable Picture/ Picture Flickers A low refresh rate or electrical interference typically causes flickering in the picture and is not normally a defective monitor: =>Try the monitor in another physical location before suspecting the monitor itself and adjust the refresh rate to 75hz or higher.
  • Page 96 General Troubleshooting Guide 201B4 M25P Go to cover page H/V Rolling, H/V Sync. 1. Turn off monitor. 2. Disconnect signal cable. 3. Turn on monitor. Does rolling occur in the self test ? (warning signal..) Check video cable for bent pins, reseat to It is need to check and system video and repair the monitor.
  • Page 97 General Troubleshooting Guide 201B4 M25P Go to cover page Picture too bright Adjust Brightness and/or contrast via the Monitor "On-Screen Display" or "Front Control Knob". Is picture displayed normally? * Reset the monitor via OSD manipulation. (Select "Reset to Factory settings".) *(or =>...
  • Page 98 General Troubleshooting Guide 201B4 M25P Go to cover page Note : 1. Sun light passing through a window is much brighter than monitor luminance (Luminance is the measurable quantity which most closely Picture too dim corresponds to brightness), therefore the two worst places for a monitor is directly facing the window or directly behind the window.
  • Page 99 General Troubleshooting Guide 201B4 M25P Go to cover page NO POWER / LED is off Is cabinet of monitor damaged being dropped? 1. Is the correct AC power cord connected? The monitor may have 2. Is AC power outlet active? become faulty due to 3.
  • Page 100 : Moir is a natural effect or phenomenon of CRT that has the appearance of a wavy pattern é which is repetitive and superimposed on the screen as ripple images. , not just Philips monitor had. These are a few suggestions to help for reducing or minimizing the effect.
  • Page 101 General Troubleshooting Guide 201B4 M25P Go to cover page OSD MAIN MENU LOCKED Press and hold the OSD menu key for about 10 seconds , until picture displays "OSD MAIN MENU UNLOCKED" Please contact your dealer/reseller for more information.
  • Page 102 General Troubleshooting Guide 201B4 M25P Go to cover page Shimmering/ Jitter/Video Noise Turn on monitor with a display or image for 30 minutes (due to drift). Jitter or Noise still present ? Try moving the monitor to another location to see if problem goes away. Jitter or Noise disappear.
  • Page 103 General Troubleshooting Guide 201B4 M25P Go to cover page Missing Color There are 2 easy ways to determine the Missing color problem. 1. View an image that is supposed to be "White". If one of the colors (RGB) is not functioning.
  • Page 104 General Troubleshooting Guide 201B4 M25P Go to cover page Color Purity Turn on monitor with a full image for 30 minutes (due to drift). Color Purity or Blotchy or Streaky Press Degauss button (or via the OSD manipulation) or Turn unit "OFF" then "ON" to degauss. Does degaussing resolve ? Note the location of "problem area"...
  • Page 105 General Troubleshooting Guide 201B4 M25P Go to cover page Power management function is not active Verify the PC is compliant with VESA. In case all of the video signals of PC are not off, power management function is not active normally. [Repeat to power on and off (power management).]...
  • Page 106 General Troubleshooting Guide 201B4 M25P Go to cover page A buzzing sound when powering on This sound is caused when the auto degaussing circuit is active. This buzzing sound is normal when the monitor is first turned on. This sound may be louder during the winter months and during initial power on.
  • Page 107 201B4 M25P Go to cover page CustoMax CustoMax is proprietary Philips software that allows user to control parameter (e.g. Size , Color , Geometry ) in place of the buttons on the front of the monitor. To install and run the CustoMax., you must have a USB compatible system and have a USB connection on the rear of your monitor.
  • Page 108 WYSIWYG (what you see is what you get ) . The Colorific software is the property of Sonnetech ,Ltd. Only certain Philips monitor Models are equiped with the software. If you have special interesting , please hit the web site "http:\www.colorific.com".
  • Page 109 PC OEMs. USB 2.0 : Drafted by Compaq, Hewlett Packard, Intel, Lucent, Microsoft, NEC and Philips, USB Specification version 2.0 will increase device data throughout up to 480Mbps, 40 times faster than USB 1.1 devices.
  • Page 110 General Troubleshooting Guide 201B4 M25P Go to cover page Picture too Large or Small : Reset monitor via OSD menu maniputlation : Adjust the Horz(width) and.or Vert size (height) in the On Screen Display. : Change monitor timing to work at the recommended resolution. Please contact your dealer/reseller for more information.
  • Page 111 4. When the HV circuitry is operating properly there is no possibility of an x- tube must be the same type as the original, including suffix letter, or a Philips radiation problem. High voltage should always be kept at the manufacturer's approved type.

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