Related Manuals for ViewSonic E55-2
Summary of Contents for ViewSonic E55-2
- Page 1 Service Manual ViewSonic E55-2 Model No. VCDTS21914-2 15” Digital Controlled Color Monitor (E55-2_SM_566 - Rev. 1a – May 2002) ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583...
- Page 2 Further, ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or changes.
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Page 3: Table Of Contents
FRONT PANEL FUNCTION CONTROL DESCRIPTION..........6 ADJUSTING PROCEDURE..................8 CIRCUIT DESCRIPTION..................11 TROUBLE SHOOTING FLOW CHART..............22 BLOCK DIAGRAM....................26 EXPLODED DIAGRAM AND SPARE PARTS LIST..........27 10. RECOMMEND SPARE PARTS LIST..............29 11. SCHEMATIC DIAGRAMS..................31 1 . PCB LAYOUT DIAGRAM..................35 ViewSonic Corporation E55-2 Confidential – Do Not Copy... -
Page 4: Precautions And Notices
Reverse the polarity of the AC plug in the AC outlet and repeat the above measurement. Voltage measured must not exceed 7.5 volt RMS, from any exposed metallic part to ground A leakage current tester may be used the above hot check, in which case any current measured ViewSonic Corporation E55-2 Confidential – Do Not... - Page 5 Manufacture’s specified parts to prevent X-RADIATION, Shock fire, or other hazards. Do not modify the original design or this will void the original parts and labor guarantee. ViewSonic Corporation E55-2 Confidential – Do Not Copy...
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Page 6: Specifications
15” Diagonal 13.82” Deflection Persistence P22 medium short persistence phosphor Phosphor pitch 0.28mm Mask type Anti doming Invar mask mask Screen finish Anti-glare, anti-static Face plate Filter glass TOSHIBA CRT : M36LGE23X205 ViewSonic Corporation E55-2 Confidential – Do Not Copy... - Page 7 Temperature and humidity at storage : -40 ~ 60 °C and 5 ~ 95% RH Less than 6 month. Altitude: Operating : 0 ~ +3000 metres ( ~ 10000 feet ). Non-operating : 0 ~ +12000 metres ( ~ 36000 feet ). ViewSonic Corporation E55-2 Confidential – Do Not Copy...
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Page 8: Timing Chart
11.183 16.005 13.714 12.552 (LINES) (400) (480) (480) (600) (600) (768) (768) (1024) (480) (624) S V.FRONT PORCH (ms) 0.381 0.381 0.027 0.021 0.019 0.017 0.015 0.016 0.086 0.021 (LINES) (12) (10) ViewSonic Corporation E55-2 Confidential – Do Not Copy... -
Page 9: Front Panel Function Control Description
Pin Balance: Cause right and lift sides become balance curve. Trapezoid: Adjust ratio between the horizontal size at top and the horizontal size at bottom of picture. Parallel: Cause the picture become parallel. Moire: Adjust picture moire. ViewSonic Corporation E55-2 Confidential – Do Not Copy... - Page 10 If Horizontal, Vertical frequency are over range, it will show: Display time : 5 seconds. H . V FREQUENCY B. When entering power-saving, press any key will re-display this OVER RANGE message. Display time : 15 sec. ViewSonic Corporation E55-2 Confidential – Do Not Copy...
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Page 11: Adjusting Procedure
Low light adjusting : Go to R-CUT OFF, and adjust R-CUT OFF to 0% on OSD. Repeat this method for G-CUT OFF and B-CUT OFF too. R-CUT OFF R-DRIVE G-CUT OFF G-DRIVE B-CUT OFF B-DRIVE ViewSonic Corporation E55-2 Confidential – Do Not Copy... - Page 12 5 seconds after power On. Apply signal from the pattern generator (See page 7 ) with full white or crosshatch pattern. Adjust brightness to 50 % and contrast to 100%, Power Off the monitor. ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 13 5 seconds after power On. for canceling the Burn in mode. Note. 2 Timing spec. Number of preset White balance signal Raster center adjusting Model timing E55-2 800x600/ 85 Hz 1024*768 / 75 Hz See page Note. 3 Color adjusting spec. MODEL E55-2 0.283 + 0.003...
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Page 14: Circuit Description
2.1 Auto SYNC Deflection control and B+ control circuit Horizontal and vertical sync through IC401 TDA9115 transmit. Deflection controller IC401. a. The control input (V-position, H-position, V-size, H-size, Pincushion, Pin-Balance, Trapezoid, Parallelogram,corner, moire) are use I C control. b. SYNC input. ViewSonic Corporation E55-2 Confidential – Do Not Copy... - Page 15 The X-RAY radiation protection circuit is used in this monitor is a latching type the monitor will shut down and continue until turn-off the monitor with power switch. And monitor can recovery by Turn ON the power switch. ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 16 When beam current pass through R447 over 400 uA., the voltage build at base of Q418 will be low enough to turn on Q418, then the voltage of pin22 of IC601 will be pulled down accordingly to reduce the video Pre-amplifier gain output. Brightness Control. ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 17 Q414 and select C415 to be parallel with C414 in low frequency. To count H-SYNC by the output frequency, then output the cumulating as listed. Freq. Pin21 Pin22 < 36.5 KHz 36.5 KHz ~ 41 KHz 41KHz ~ 52 KHz 52 KHz ~ 70 KHz ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 18 * Only 220V for testing on secondary side of T101. (Because voltage at any point on secondary side of T101 are same at any level of AC input usually. Equipment : Oscilloscope 100 Mhz. ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 19 CH2 : IC101 Pin 3 Figure 3 Vin = 110 VAC CH1 : Q101 Pin D CH2 : Q101 Pin G Figure 4 Vac = 220 Vac CH1 : Q101 PinD CH2 : Q101 Pin G ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 20 CH2 : IC101 Pin 4 Figuer 7 Vin = 220 VAC CH1: IC301 Pin 7 CH2 : IC301 Pin 5 Figure 8 CH1 : IC301 Pin39 H.sync input CH2: IC301 Pin33 H.sync output ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 21 CH1 : IC401Pin 28 B + Drv. CH2 : IC401 Pin 12 H. FLY Figure 11 CH1 : Q202 Pin G CH2 : Q202 Pin D Figure 12 CH1 : Q202 Pin G CH1 : Q202 Pin D ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 22 CH1 : Q402 Pin C CH2 : Q401 Pin B Figure 15 CH1: D423 Pin A CH2 : ZD405 Pin A (X-ray protection) Figure 16 CH1: H.FLY (R445) CH2 : Q403 Pin C H. blank ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 23 CH1 : Q409 Pin C CH2 : D402 Pin K Figure 19 CH1 : IC401 Pin 23 V. out CH2 : IC501 Pin 3 V. blank Figure 20 CH1 : VDY + CH2 : VDY – ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 24 While power off (spot killer) Figure 23 CH1: IC603 Pin 1 Red output to cathod (CRT pin). (cross hatch pattern) Figure 24 CH1: IC601 Pin20 Red input CH2 : IC602 Pin12 Fast blanking output while showing ViewSonic Corporation E55-2 Confidential – Do Not Copy...
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Page 25: Trouble Shooting Flow Chart
Replace Q101 or R112 normal R111, R112 Check video circuit Check horizontal and vertical circuit Are TP201~TP205 voltage normal Check D201, D203, D205, D206, Q203, Q208 Is the T101 normal Replace T101 ViewSonic Corporation E55-2 Confidential – Do Not Copy... - Page 26 Horizontal drive is Is the waveform of Q401 defective T401, Q401, "BASE" normal? 0.8Vp-p Diode modulation circuit is Is the diode modulatic defictive C401, D401, circuit normal? D402,C414, C415, Q409, C416 CRT is defective ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 27 IC501 normal? pin4=-11V? Is the waveform of IC401 Check the d flection Yoke pin21, pin23 normal? R502 is defective Are R502 normal? IC401 is defective Check power supply 13V, FBT -11V ViewSonic Corporation E55-2 Confidential – Do Not Copy...
- Page 28 G1,G2 of CRT socket D206, G1, G2, FBT, D420, normal? Q420 and its drive circuit Heater: 6.3VDC G1: -30V G2: 500V _by high volt probe The CRT is defective. ViewSonic Corporation E55-2 Confidential – Do Not Copy...
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Page 29: Block Diagram
BLOCK DIAGRAMS ViewSonic Corporation E55-2 Confidential – Do Not Copy... -
Page 30: Exploded Diagram And Spare Parts List
EXPLODED DIAGRAM AND SPARE PARTS LIST ViewSonic Corporation E55-2 Confidential – Do Not Copy... - Page 31 MECHANICAL PARTS LIST (E55-2) ITEM DESCRIPTION VIEWSONIC P/N PART NO. FRONT BEZEL C-FP-0301-0882 3361030800 POWER KNOB PL-BT-0706-0055 3360072900 COMPRESSION SPRING M-MS-0808-1681 3421103700 RUBBER PAD PL-PD-0714-0016 3240032100 FUNCTION KEY PL-FK-0709-0006 3360068800 LED LENS M-MS-0808-0904 3360053700 CRT GROUNDING WIRE 3649106000 SCREW TAPPING 3*0.5*6...
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Page 32: Recommend Spare Parts List
10. SPARE PARTS LIST LOC. VIEWSONIC P/N PART NO. REFERENCE NO. DESCRIPTION R457 E-R-0405-0935 0190201100 RES FUSING MF 1/2W 2.2 J F101 E-FS-0410-0070 0805340602 FUSE TSC 3.15A UL SEM PIG R225 E-FS-0410-0085 0841110202 FUSE F/P 1.5A 125V UL CSA CR101... - Page 33 SPRING COMPRESSION SUS-304 ID= M-MS-0808-4206 3421047903 SPACER SUPPORT NYLON 94V-2 14* P-FM-0602-0166 3500036900 END BLOCK-LEFT P-FM-0602-0167 3500037000 END BLOCK-RIGHT P-BX-0601-0701 3512225800 CARTON 481*446*453 J570SAM E55-2 A-CD-E55-2 3532043600 CD WIZARD FOR E55-2 M-MS-0808-8227 5011079700 QSG FOR E55-2 M-MS-0808-2802 3520085701 PE BAG B-MB-0201-0681 5600010462...
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Page 34: 11. Schematic Diagrams
11. SCHEMATIC DIAGRAMS ViewSonic Corporation E55-2 Confidential – Do Not Copy... - Page 35 ViewSonic Corporation E55-2 Confidential – Do Not Copy...
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Page 38: Pcb Layout Diagram
PCB LAYOUT DIAGRAM ViewSonic Corporation E55-2 Confidential – Do Not Copy...