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Acer V551 (new) CRT Monitor Service Guide
Chapter 3 Alignment Procedure
Table of Contents
0. Preparation for Alignment............................................................................................................. 2
1. B+ Adjustment (For function test station only) ............................................................................ 2
2. Geometry Adjustment ................................................................................................................... 2
3. Background Adjustment................................................................................................................ 3
4. Foreground Adjustment ................................................................................................................ 3
5. Final Check ................................................................................................................................... 3
6. Focus Adjustment ......................................................................................................................... 4
7. Convergence Adjustment .............................................................................................................. 4
8. Power Saving Function Check ...................................................................................................... 4
9. Geometry Specification for Production Line ................................................................................ 5
10. Eyelet parts.................................................................................................................................. 5
11. Touch-up parts ............................................................................................................................ 7
12. Glue parts .................................................................................................................................... 8
13. Wire Dressing parts..................................................................................................................... 9
1
Confidence and Property
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- Page 1 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure Table of Contents 0. Preparation for Alignment......................2 1. B+ Adjustment (For function test station only) ................2 2. Geometry Adjustment ........................2 3. Background Adjustment........................ 3 4. Foreground Adjustment ........................ 3 5.
- Page 2 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 0. Preparation for Alignment Pre-set all VRs to the center position except R/G/B bias VR101, 102, 103 counterclockwise to maximum. b. Set up unit and keep it warm up at least 15 minutes.
- Page 3 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 3. Background Adjustment Enter factory area -- Press "SELECT +" and "ADJUST -" at the same time then turn power switch on. b. Input mode 53.6KHz (SVGA5) with raster only pattern.
- Page 4 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 6. Focus Adjustment Input mode 53.6KHz (SVGA5) with characters pattern. b. Press "SELECT +" and "ADJUST -" keys at a same time. Adjust focus VR of FBT to make "A" area focus clear.
- Page 5 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 9. Geometry Specification for Production Line (Table 2) ITEM DESCRIPTION SPECIFICATION 270 ± 4 mm HORI SIZE 202 ± 4 mm VERT SIZE ≦ 2.0 mm SIDE PIN ≦ 1.0 mm TOP/BOTTOM PIN ≦...
- Page 6 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 2. T303 3. IC202 Heat sink/ T302 4. M101 CRT socket Confidence and Property...
- Page 7 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 11. Touch-up parts The component listed below must touch-up to avoid solder crack. 1. Q310: 3 points 2. D307: 3 points 3. L302: 2 points 4. CN601: 3 points...
- Page 8 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 5. Q602: 3 points 6. C612: 2 points 7. M101: 8 points 12. Glue parts 1. G2 & G4 VR add glue to fix the position of VR Confidence and Property...
- Page 9 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 2. R607 add glue to fix the Heat sink 13. Wire Dressing parts 1. Left side view: 2. Right side view: Confidence and Property...
- Page 10 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 3. Rear side view: 4. Left/Bottom degaussing fixed 5. Right/Bottom degaussing fixed Confidence and Property...
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Page 11: Table Of Contents
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Table of Contents 0 Introduction ........................... 2 1 Electrical Characteristics....................... 2 1.1 Power Supply ........................2 1.2 Signal Interface........................2 1.3 Scan Range......................... 2 1.4 Video Performance......................3 1.5 Timings..........................3 2 Environment &... -
Page 12: Introduction
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 0 Introduction The subject model is designed for a value line 15” color monitor. It has the following figures : 0.28mm dot pitch CRT, 65MHz video bandwidth, 1024x768 max resolution. -
Page 13: Video Performance
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Condition Spec 1.4 Video Performance Remark OK N.A Dot Rate 65 MHz Max. Resolution 1024 x 768 Rise time/Fall time 10 ns Video Ringing 15% max 5% max Bandwidth -3db... -
Page 14: Environment & Reliability
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 2 Environment & Reliability Condition Spec Remark OK N.A +10 ~ +40 ℃ / 20~90% R.H. Operation Temp./Humidity Non-condensing -20~ +60 ℃ / 10~95% R.H. Non- Operation Temp./Humi. Non-condensing... -
Page 15: Crt Characteristics
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 3 CRT Characteristics Spec Remark OK N.A CRT Vender PHILIPS Technology Coating Anti-glass/Anti-static Dot pitch 0.28mm Phosphor Light transmittance Viewable size > 14” Deflection angle 90 deg see table 2... -
Page 16: Sharpness Crispness
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 4.2 Sharpness Crispness Remark OK N.A Focus “e,w,m” at cut-off and Reverse character(white The distance of watch is 30cm 800 x 600 resolution background and black from eyes to screen... -
Page 17: Advanced
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Parallelogram Trapezoid I-Key 5.2 Advanced Function Spec Remark OK N.A OSD position Color Gain Corner Pin-balance Tilt Color Temp. C1, C2 9300K, 6500K Manual Degauss Recall Languages 5 languages Mis-Convergence adj. -
Page 18: Mechanical Characteristics
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 6 Mechanical Characteristics 6.1 Dimension Spec Remark OK N.A Bezel opening 212 x 283 mm Monitor w/o Stand L x W x H mm 384 x 361 x 331 mm... -
Page 19: Pallet & Shipment
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 7 Pallet & Shipment 7.1 Dimension Transport Type Pallet A Pallet B Pallet C Shipping Pallet Length 1422 Dimension(mm) Width Height Air Transport Pallet Length 1422 Dimension(mm) Width Height 7.2 Shipping Container... -
Page 20: Certification
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 8 Certification 8.1 Environment Condition Spec Remark Green design ACM Doc. 715-C49 ISO14000 Requirement Blue Angel German Standard E-2000 Switzerland NUTEK Swedish Standard USA Standard EN61000-3-2 Harmonics TCO92/95 TCO99 8.2 PC-Monitor... -
Page 21: X-Ray Requirement
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification BCIQ (Taiwan) C-Tick (Australia) AS3548 RRL (Korean) Condition Spec X-Ray Requirement Remark DHHS (21 CFR) USA X- Ray Standard DNHW German X- Ray standard MPRII MPRIII 8.6 Ergonomics Condition... -
Page 22: Appendix Table
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 9 Appendix Table Table 1 - DDC Table Address Data Description Header ID Manufacturer Name =ACM (EISA 3 character ID) ID Product Code = V551 (Vender Assigned code) ID Serial Number 32 bits serial no. - Page 23 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Address Data Description Detailed Timing Description # 1 43~47 Detailed Timing Description # 2 Confidence and Property...
- Page 24 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Address Data Description Detailed Timing Description # 3 Detailed Timing Description #4 Extension Flag Check sum Confidence and Property...
- Page 25 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Note 1 Bit Description Analog / Digital Signal Level Signal Level Standard (6) Signal Level Standard (5) Setup Sync Inputs Supported (3) Sync Inputs Supported (2) Sync Inputs Supported (1)
- Page 26 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Note 2 Bit 7 Stand-by Bit 6 Suspend Bit 5 Active off Bit 4:3 Display Type 0,0 - Monochrome/gray scale display 0,1 - RGB color display 1,0 - Non-RGB multicolor display (example:RGY) 1,1 - Undefined.
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Page 27: Table 2 – Geometry Fig
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Table 2 – Geometry Fig. Fig.1 Linearity Measurements X11 ~ X18 Xmax - Xmin ------------------- X 100% < 5% Xmax + Xmin Ymax - Ymin ------------------- X 100% < 5%... -
Page 28: Fig.2 General Pincushion Measurements
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Fig.2 General Pincushion Measurements Bmm b1 A, B represented as display area width and height Top/Bottom Pincushion = (a1 or a2) Side Pincushion = (b1 or b2) Substituted A by (PS + QR)/2... -
Page 29: Fig.3 Trapezoid Measurements
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Fig.3 Trapezoid Measurements * Each of the 4 corners of picture shall fall within the relevant area (F) illustrated up (hatched) * ABCD is the picture outlines. Confidence and Property... -
Page 30: Fig.4 Picture Distortion & Phase Measurements
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Fig.4 Picture Distortion & Phase Measurements orthogoal Tilt Total Peak Confidence and Property... - Page 31 (5) DC Restore CKT ........................ 12 (6) ABL CKT: (Auto Brightness Limit)................13 (7) Brightness, V-blank, change mode blank, spot killer CKT ..........14 ACER V551 MICROCONTROLLER CIRCUIT OPERATION THEORY ........15 1. Introduction .......................... 15 2. Block diagram ........................15 3.
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Page 32: Defection Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory 1. Defection CKT (1) Circuit Diagram of Defection +40V C235 R269 0.1U R203 (OPEN) ZD201 100K BLANK Q210 R268 +12V (OPEN) +6.3V (OPEN) VR201 (OPEN) (HVADJ) D201 1N4148... -
Page 33: Autosync Deflection Controller--Tda4857
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (2) Autosync Deflection Controller--TDA4857 2.1 pin 1 is AFC feedback . 2.2 pin XRAY: if V XRAY > threshold (6.25V typical) switches the whole IC into protection mode. -
Page 34: H-Size Control Circuit
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (4) H-size control circuit (a) H-size control voltage 0~5V input from "H-SIZE" net. (b) Q301 is a buffer to separate prior signal and latter. (c) R328 and D314 series connect to SC1 is used to compensating H-size by different horizontal frequency (for VGA). -
Page 35: Horizontal Output Circuit
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (5) Horizontal output circuit (a) C321 couple the HDRV wave form from TDA4857 pin7 to Q315 for switching signal and get the energy by R335 and R332 series, then through the driver transformer T301 couple the driver wave form to horizontal transistor Q310 via R336 at plus duty and via D312 at minus duty. -
Page 36: H-Linear Correction Circuit
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (6) H-Linear correction circuit (a) L302 is Linear coil for linearity correction and C312 is Cs capacitor for deflection current S correction. (b) R318 and C313 series that parallel to L302 pin1-2 for ringing inhibit. -
Page 37: Step-Up Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (7) Step-up CKT (a) B + drive duty pulse comes from TDA4857 pin 6 (b) Q305, Q306 constructed class B output to drive Q317. (c) When Q317 turns on, L304 storage energy and D317 is off. when Q317 turns off L304 release energy and D317 turns on to charge C326 to B+ (d) The higher Hor. -
Page 38: Vertical Output
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (8) Vertical output (a) TDA4866 is a vertical deflection amplifier, pin7 need a higher DC voltage (50V currently) for deflection current amplify. (b) TDA4866 pin1,2 is vertical drive input pin from TDA4857 pin12,13. -
Page 39: Video Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory 2. Video CKT (1) Black Diagram of Video DC Restore Preamp CKT MM1375XD (From PC) IC101 VIDEO Cascode CKT Q101,110 Q103,111 Q105,112 CONTRAST (From uC IC801) Brightness CKT: Q203... -
Page 40: Preamp Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (3) Preamp CKT (a) AS shown in the block diagram: The R/G/B signals will generate an enough amplitude of Vpp to show up on the CRT screen after the amplification of the amplifiers. -
Page 41: Cascode Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (4) Cascode CKT (a) Output stage adopts cascode circuit Its purpose is to amplify the signal which has been processed by MM1375XD to a enough amplitude of Vpp, then display on the CRT. -
Page 42: Dc Restore Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (5) DC Restore CKT (a) The video signal amplified by the output stage is coupled to CRT by way of AC coupling. So DC restoration CKT is needed to do the white balance adjustment. -
Page 43: Abl Ckt: (Auto Brightness Limit)
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (6) ABL CKT: (Auto Brightness Limit) ABL is a protection circuit. When the anode current goes higher than the setting value of ABL circuit . ABL will pull down the voltage of contrast to limit the anode current. This is helpful to protect CRT. -
Page 44: Brightness, V-Blank, Change Mode Blank, Spot Killer Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (7) Brightness, V-blank, change mode blank, spot killer CKT (a) About the cut off voltage, while the voltage, cathode to G1, over the cut off voltage, the picture will disappear. If the cut off voltage of the CRT G Gun is set at 120V and the black level of cathode is 55v, the picture want to show the signals higher the black level once the G1 voltage is lower than -65V. -
Page 45: Acer V551 Microcontroller Circuit Operation Theory
ACER V551 MICROCONTROLLER CIRCUIT OPERATION THEORY 1. Introduction The microcontroller of the V551 can discriminate the display mode by detecting the frequency of the H/V sync signals and the polarity of horizontal sync signal. It provides DC voltages to control the picture and save the adjusted parameters into the EEPROM by using the control panel. -
Page 46: How To Detect Mode Timing
5. What are the valid key functions for user Total 4 keys for V551 control panel, "select +" & "select -" are the selection of controlled function with LED change, and "adjust +" & "adjust -" are the selected item to increase & decrease volume. -
Page 47: Acer V551 Power Supply Circuit Operation Theory
ACER V551 POWER SUPPLY CIRCUIT OPERATION THEORY (1) Brief : Acer V551 is equipped with a current mode, constant frequency, synchronous, using fly back switching mode power supply circuit,(The operating frequency won't vary with the change of input voltage or output load. This means synchronous with monitor .) In abbrev, the SMPS or SPS. - Page 48 Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory 7. Sync. CKT 8. Transformer 9. 10-12: Rectifier & Filter CKT 10. V-sync Detector CKT 11. EPS1 Detector CKT 12. Photo coupler 13. Control switch on/off 1. EMI filter CKT is a necessary circuit for restraining the electromagnetic interference to meet the standard of FCC and FTZ.
- Page 49 Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory auxiliary coil (pin 8-9) of T601 will generate a voltage to be rectified and filtered by C608, D608, D607, C607 to maintain the operation. 4. Switching FET & Snubber circuit.
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Page 50: Attachment A
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory Attachment A Confidence and Property... - Page 51 Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory Symbol Parameter Value Unit Supply Voltage (low impedance source) Supply Voltage (li < 30mA) self limiting ± 1 Ouptut Current μ J Output Energy (capacitive load) Analog imputs( pins 2,3) -0.3 to 55...
- Page 52 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure Table of Contents 0. Preparation for Alignment......................2 1. B+ Adjustment (For function test station only) ................2 2. Geometry Adjustment ........................2 3. Background Adjustment........................ 3 4. Foreground Adjustment ........................ 3 5.
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Page 53: Preparation For Alignment
Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 0. Preparation for Alignment Pre-set all VRs to the center position except R/G/B bias VR101, 102, 103 counterclockwise to maximum. b. Set up unit and keep it warm up at least 15 minutes. -
Page 54: Background Adjustment
Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 3. Background Adjustment Enter factory area -- Press "SELECT +" and "ADJUST -" at the same time then turn power switch on. b. Input mode 53.6KHz (SVGA5) with raster only pattern. -
Page 55: Focus Adjustment
Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 6. Focus Adjustment Input mode 53.6KHz (SVGA5) with characters pattern. b. Press "SELECT +" and "ADJUST -" keys at a same time. Adjust focus VR of FBT to make "A" area focus clear. -
Page 56: Geometry Specification For Production Line
Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 9. Geometry Specification for Production Line (Table 2) ITEM DESCRIPTION SPECIFICATION 270 ± 4 mm HORI SIZE 202 ± 4 mm VERT SIZE ≦ 2.0 mm SIDE PIN ≦ 1.0 mm TOP/BOTTOM PIN ≦... - Page 57 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 2. T303 3. IC202 Heat sink/ T302 4. M101 CRT socket Confidence and Property...
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Page 58: Touch-Up Parts
Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 11. Touch-up parts The component listed below must touch-up to avoid solder crack. 1. Q310: 3 points 2. D307: 3 points 3. L302: 2 points 4. CN601: 3 points... -
Page 59: Glue Parts
Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 5. Q602: 3 points 6. C612: 2 points 7. M101: 8 points 12. Glue parts 1. G2 & G4 VR add glue to fix the position of VR Confidence and Property... -
Page 60: Wire Dressing Parts
Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 2. R607 add glue to fix the Heat sink 13. Wire Dressing parts 1. Left side view: 2. Right side view: Confidence and Property... - Page 61 Acer V551 (new) CRT Monitor Service Guide Chapter 3 Alignment Procedure 3. Rear side view: 4. Left/Bottom degaussing fixed 5. Right/Bottom degaussing fixed Confidence and Property...
- Page 62 Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting Table of Contents 1. No output power......................... 2 2. No video............................. 3 3. No work............................4 4. Unstable vertical display......................5 5. H-size adjust..........................6 6. H-linearity error.......................... 7 7.
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Page 63: No Output Power
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 1. No output power No power Check F601, Replace F601, D602~D605 ok? D602~D605 Replace IC601, Check IC601, ZD602, ZD606 ZD602,ZD606 Check Q602, Replace Q602, T601 ok? T601 Check D701,... -
Page 64: No Video
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 2. No video Repair Check 12V? Check R, G, B input of M101 Repair Check pin 2, 3, Repair 4 of M103 ok? Check IC101 R, G, B input Repair IC101 &... -
Page 65: No Work
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 3. No work Feed back Check LED Check G1, No Power G2, R, G, B Green flowchart Output ok? Amber Check pin 6, Repair IC201 7 of IC201 Check BDRV... -
Page 66: Unstable Vertical Display
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 4. Unstable vertical display Unstable vertical display IC201 pin 24 sawtooth gererator Fv OSC = 42Hz & Check IC201 IC202 has & around ckt output? Check IC202 Check DY &... -
Page 67: H-Size Adjust
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 5. H-size adjust H-size error IC801 pin 34 Replace IC801 PWM output ok? Check Q301 Check Q301 & base adjust ok? around ckt Check EWDRV Replace IC201 output ok? -
Page 68: H-Linearity Error
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 6. H-linearity error Linearity error Picture the left/right(1) or Repair L302 center/side(2) asymmetery Check SC0, Repair IC801 SC1 output Check Q322, Q323, Q314, Repair Q333 ok? Check C312, Repair... -
Page 69: Brightness Ckt Check
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 7. Brightness CKT check Brightness control error Check IC801 PWM output Replace IC801 Is the voltage of Check T303, C305 –190V? R324, D303 Check Q202 Check Blank/ base is low? - Page 70 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Table of Contents 0 Introduction ........................... 2 1 Electrical Characteristics....................... 2 1.1 Power Supply ........................2 1.2 Signal Interface........................2 1.3 Scan Range......................... 2 1.4 Video Performance......................3 1.5 Timings..........................3 2 Environment &...
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Page 71: Introduction
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 0 Introduction The subject model is designed for a value line 15” color monitor. It has the following figures : 0.28mm dot pitch CRT, 65MHz video bandwidth, 1024x768 max resolution. -
Page 72: Video Performance
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Condition Spec 1.4 Video Performance Remark OK N.A Dot Rate 65 MHz Max. Resolution 1024 x 768 Rise time/Fall time 10 ns Video Ringing 15% max 5% max Bandwidth -3db... -
Page 73: Environment & Reliability
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 2 Environment & Reliability Condition Spec Remark OK N.A +10 ~ +40 ℃ / 20~90% R.H. Operation Temp./Humidity Non-condensing -20~ +60 ℃ / 10~95% R.H. Non- Operation Temp./Humi. Non-condensing... -
Page 74: Crt Characteristics
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 3 CRT Characteristics Spec Remark OK N.A CRT Vender PHILIPS Technology Coating Anti-glass/Anti-static Dot pitch 0.28mm Phosphor Light transmittance Viewable size > 14” Deflection angle 90 deg see table 2... -
Page 75: Sharpness Crispness
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 4.2 Sharpness Crispness Remark OK N.A Focus “e,w,m” at cut-off and Reverse character(white The distance of watch is 30cm 800 x 600 resolution background and black from eyes to screen... -
Page 76: Advanced
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Parallelogram Trapezoid I-Key 5.2 Advanced Function Spec Remark OK N.A OSD position Color Gain Corner Pin-balance Tilt Color Temp. C1, C2 9300K, 6500K Manual Degauss Recall Languages 5 languages Mis-Convergence adj. -
Page 77: Mechanical Characteristics
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 6 Mechanical Characteristics 6.1 Dimension Spec Remark OK N.A Bezel opening 212 x 283 mm Monitor w/o Stand L x W x H mm 384 x 361 x 331 mm... -
Page 78: Pallet & Shipment
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 7 Pallet & Shipment 7.1 Dimension Transport Type Pallet A Pallet B Pallet C Shipping Pallet Length 1422 Dimension(mm) Width Height Air Transport Pallet Length 1422 Dimension(mm) Width Height 7.2 Shipping Container... -
Page 79: Certification
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 8 Certification 8.1 Environment Condition Spec Remark Green design ACM Doc. 715-C49 ISO14000 Requirement Blue Angel German Standard E-2000 Switzerland NUTEK Swedish Standard USA Standard EN61000-3-2 Harmonics TCO92/95 TCO99 8.2 PC-Monitor... -
Page 80: X-Ray Requirement
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification BCIQ (Taiwan) C-Tick (Australia) AS3548 RRL (Korean) Condition Spec X-Ray Requirement Remark DHHS (21 CFR) USA X- Ray Standard DNHW German X- Ray standard MPRII MPRIII 8.6 Ergonomics Condition... -
Page 81: Appendix Table
Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification 9 Appendix Table Table 1 - DDC Table Address Data Description Header ID Manufacturer Name =ACM (EISA 3 character ID) ID Product Code = V551 (Vender Assigned code) ID Serial Number 32 bits serial no. - Page 82 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Address Data Description Detailed Timing Description # 1 43~47 Detailed Timing Description # 2 Confidence and Property...
- Page 83 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Address Data Description Detailed Timing Description # 3 Detailed Timing Description #4 Extension Flag Check sum Confidence and Property...
- Page 84 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Note 1 Bit Description Analog / Digital Signal Level Signal Level Standard (6) Signal Level Standard (5) Setup Sync Inputs Supported (3) Sync Inputs Supported (2) Sync Inputs Supported (1)
- Page 85 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Note 2 Bit 7 Stand-by Bit 6 Suspend Bit 5 Active off Bit 4:3 Display Type 0,0 - Monochrome/gray scale display 0,1 - RGB color display 1,0 - Non-RGB multicolor display (example:RGY) 1,1 - Undefined.
- Page 86 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Table 2 – Geometry Fig. Fig.1 Linearity Measurements X11 ~ X18 Xmax - Xmin ------------------- X 100% < 5% Xmax + Xmin Ymax - Ymin ------------------- X 100% < 5%...
- Page 87 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Fig.2 General Pincushion Measurements Bmm b1 A, B represented as display area width and height Top/Bottom Pincushion = (a1 or a2) Side Pincushion = (b1 or b2) Substituted A by (PS + QR)/2...
- Page 88 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Fig.3 Trapezoid Measurements * Each of the 4 corners of picture shall fall within the relevant area (F) illustrated up (hatched) * ABCD is the picture outlines. Confidence and Property...
- Page 89 Acer V551 (new) CRT Monitor Service Guide Chapter 1 Engineering Specification Fig.4 Picture Distortion & Phase Measurements orthogoal Tilt Total Peak Confidence and Property...
- Page 90 (5) DC Restore CKT ........................ 12 (6) ABL CKT: (Auto Brightness Limit)................13 (7) Brightness, V-blank, change mode blank, spot killer CKT ..........14 ACER V551 MICROCONTROLLER CIRCUIT OPERATION THEORY ........15 1. Introduction .......................... 15 2. Block diagram ........................15 3.
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Page 91: Defection Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory 1. Defection CKT (1) Circuit Diagram of Defection +40V C235 R269 0.1U R203 (OPEN) ZD201 100K BLANK Q210 R268 +12V (OPEN) +6.3V (OPEN) VR201 (OPEN) (HVADJ) D201 1N4148... -
Page 92: Autosync Deflection Controller--Tda4857
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (2) Autosync Deflection Controller--TDA4857 2.1 pin 1 is AFC feedback . 2.2 pin XRAY: if V XRAY > threshold (6.25V typical) switches the whole IC into protection mode. -
Page 93: H-Size Control Circuit
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (4) H-size control circuit (a) H-size control voltage 0~5V input from "H-SIZE" net. (b) Q301 is a buffer to separate prior signal and latter. (c) R328 and D314 series connect to SC1 is used to compensating H-size by different horizontal frequency (for VGA). -
Page 94: Horizontal Output Circuit
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (5) Horizontal output circuit (a) C321 couple the HDRV wave form from TDA4857 pin7 to Q315 for switching signal and get the energy by R335 and R332 series, then through the driver transformer T301 couple the driver wave form to horizontal transistor Q310 via R336 at plus duty and via D312 at minus duty. -
Page 95: H-Linear Correction Circuit
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (6) H-Linear correction circuit (a) L302 is Linear coil for linearity correction and C312 is Cs capacitor for deflection current S correction. (b) R318 and C313 series that parallel to L302 pin1-2 for ringing inhibit. -
Page 96: Step-Up Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (7) Step-up CKT (a) B + drive duty pulse comes from TDA4857 pin 6 (b) Q305, Q306 constructed class B output to drive Q317. (c) When Q317 turns on, L304 storage energy and D317 is off. when Q317 turns off L304 release energy and D317 turns on to charge C326 to B+ (d) The higher Hor. -
Page 97: Vertical Output
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (8) Vertical output (a) TDA4866 is a vertical deflection amplifier, pin7 need a higher DC voltage (50V currently) for deflection current amplify. (b) TDA4866 pin1,2 is vertical drive input pin from TDA4857 pin12,13. -
Page 98: Video Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory 2. Video CKT (1) Black Diagram of Video DC Restore Preamp CKT MM1375XD (From PC) IC101 VIDEO Cascode CKT Q101,110 Q103,111 Q105,112 CONTRAST (From uC IC801) Brightness CKT: Q203... -
Page 99: Preamp Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (3) Preamp CKT (a) AS shown in the block diagram: The R/G/B signals will generate an enough amplitude of Vpp to show up on the CRT screen after the amplification of the amplifiers. -
Page 100: Cascode Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (4) Cascode CKT (a) Output stage adopts cascode circuit Its purpose is to amplify the signal which has been processed by MM1375XD to a enough amplitude of Vpp, then display on the CRT. -
Page 101: Dc Restore Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (5) DC Restore CKT (a) The video signal amplified by the output stage is coupled to CRT by way of AC coupling. So DC restoration CKT is needed to do the white balance adjustment. -
Page 102: Abl Ckt: (Auto Brightness Limit)
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (6) ABL CKT: (Auto Brightness Limit) ABL is a protection circuit. When the anode current goes higher than the setting value of ABL circuit . ABL will pull down the voltage of contrast to limit the anode current. This is helpful to protect CRT. -
Page 103: Brightness, V-Blank, Change Mode Blank, Spot Killer Ckt
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory (7) Brightness, V-blank, change mode blank, spot killer CKT (a) About the cut off voltage, while the voltage, cathode to G1, over the cut off voltage, the picture will disappear. If the cut off voltage of the CRT G Gun is set at 120V and the black level of cathode is 55v, the picture want to show the signals higher the black level once the G1 voltage is lower than -65V. -
Page 104: Acer V551 Microcontroller Circuit Operation Theory
ACER V551 MICROCONTROLLER CIRCUIT OPERATION THEORY 1. Introduction The microcontroller of the V551 can discriminate the display mode by detecting the frequency of the H/V sync signals and the polarity of horizontal sync signal. It provides DC voltages to control the picture and save the adjusted parameters into the EEPROM by using the control panel. -
Page 105: How To Detect Mode Timing
5. What are the valid key functions for user Total 4 keys for V551 control panel, "select +" & "select -" are the selection of controlled function with LED change, and "adjust +" & "adjust -" are the selected item to increase & decrease volume. -
Page 106: Acer V551 Power Supply Circuit Operation Theory
ACER V551 POWER SUPPLY CIRCUIT OPERATION THEORY (1) Brief : Acer V551 is equipped with a current mode, constant frequency, synchronous, using fly back switching mode power supply circuit,(The operating frequency won't vary with the change of input voltage or output load. This means synchronous with monitor .) In abbrev, the SMPS or SPS. - Page 107 Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory 7. Sync. CKT 8. Transformer 9. 10-12: Rectifier & Filter CKT 10. V-sync Detector CKT 11. EPS1 Detector CKT 12. Photo coupler 13. Control switch on/off 1. EMI filter CKT is a necessary circuit for restraining the electromagnetic interference to meet the standard of FCC and FTZ.
- Page 108 Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory auxiliary coil (pin 8-9) of T601 will generate a voltage to be rectified and filtered by C608, D608, D607, C607 to maintain the operation. 4. Switching FET & Snubber circuit.
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Page 109: Attachment A
Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory Attachment A Confidence and Property... - Page 110 Acer V551 (new) CRT Monitor Service Guide Chapter 2 Circuit Operation Theory Symbol Parameter Value Unit Supply Voltage (low impedance source) Supply Voltage (li < 30mA) self limiting ± 1 Ouptut Current μ J Output Energy (capacitive load) Analog imputs( pins 2,3) -0.3 to 55...
- Page 111 Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting Table of Contents 1. No output power......................... 2 2. No video............................. 3 3. No work............................4 4. Unstable vertical display......................5 5. H-size adjust..........................6 6. H-linearity error.......................... 7 7.
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Page 112: No Output Power
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 1. No output power No power Check F601, Replace F601, D602~D605 ok? D602~D605 Replace IC601, Check IC601, ZD602, ZD606 ZD602,ZD606 Check Q602, Replace Q602, T601 ok? T601 Check D701,... -
Page 113: No Video
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 2. No video Repair Check 12V? Check R, G, B input of M101 Repair Check pin 2, 3, Repair 4 of M103 ok? Check IC101 R, G, B input Repair IC101 &... -
Page 114: No Work
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 3. No work Feed back Check LED Check G1, No Power G2, R, G, B Green flowchart Output ok? Amber Check pin 6, Repair IC201 7 of IC201 Check BDRV... -
Page 115: Unstable Vertical Display
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 4. Unstable vertical display Unstable vertical display IC201 pin 24 sawtooth gererator Fv OSC = 42Hz & Check IC201 IC202 has & around ckt output? Check IC202 Check DY &... -
Page 116: H-Size Adjust
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 5. H-size adjust H-size error IC801 pin 34 Replace IC801 PWM output ok? Check Q301 Check Q301 & base adjust ok? around ckt Check EWDRV Replace IC201 output ok? -
Page 117: H-Linearity Error
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 6. H-linearity error Linearity error Picture the left/right(1) or Repair L302 center/side(2) asymmetery Check SC0, Repair IC801 SC1 output Check Q322, Q323, Q314, Repair Q333 ok? Check C312, Repair... -
Page 118: Brightness Ckt Check
Acer V551 (new) CRT Monitor Service Guide Chapter 4 Trouble Shooting 7. Brightness CKT check Brightness control error Check IC801 PWM output Replace IC801 Is the voltage of Check T303, C305 –190V? R324, D303 Check Q202 Check Blank/ base is low?