Service Manual ViewSonic VG700b-2 Model No. VLCDS24606-1W 17” Color TFT LCD Display (VG700b-2_SM_605 - Rev. 1b Feb.
Copyright Copyright ¤ 2003 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of ViewSonic Corporation.
TABLE OF CONTENTS 1. Precautions and Safety Notices 1 2. Specification 2 3. Front Panel Function Control Description 3 4. Circuit Description 5 5. Adjusting Procedure 13 6. Trouble Shooting Flow Chart 17 7. Recommended Spare Parts List 20 8. Exploded Diagram And Spare Parts List 24 9. Block Diagram 26 10. Schematic Diagrams 27 11.
1. Precautions and Safety Notices 1. Caution : No modification of any circuit should be attempted. Service work should only be performed after you are thoroughly familiar with all of the following safety checks and servicing guide line. 2. Safety Check : Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit. These voltages are exposed in such areas as the associated transformer circuits. 3.
2. Specification Mechanical: Dimension ( W x H x D ) mm Set: a. with stand b. Without stand 410.0 x 433 x 180 mm 410.0 x 433 x 58.4 mm Base (L X W) 290 x 180 mm Packing : ( W x H x D ) mm 472 x 515 x 216 mm Weight: Net / Gross ( Kg ) 4.5 / 6.9 Wall Mount (VESA) 100 x 100 mm LCD Panel type QDI / QD17EL07 Max. Resolution (HxV) 1280 x 1024 Nominal picture size (HxV 338 mm x 270 mm Display colors 16.2 M ( 6 bit + dithering) Dot pitch 0.
3. Front Panel Function Control Description Displays the Main Menu or exits the control screen and saves adjustments. Scrolls through menu options and adjusts the displayed control. Also a shortcut to display the Temporarily silence Contrast adjustment control screen. audio output Power light Green = ON Orange=power Power On / Off Displays the control screen for the highlighted control. Also toggles Decreases or between two controls on some screens.
Main Menu Controls Adjust the menu items shown below by using the up and down buttons. A. Auto Image Adjust automatically sizes, centers, and fine tunes the video signal to eliminate waviness and distortion. Press the [2] button to obtain a sharper image. NOTE: Auto Image Adjust works with most common video cards. If this function does not work on your LCD display, then lower the video refresh rate to 60 Hz and set the resolution to its pre-set value. B.
4. Circuit Description 4-1. Outline 1.1 POWER On/Off , LED, Button"2" , Up arrow- button , Down arrow button , Button"1" , button , Down arrow button , Button"1" , on the front panel. 1.2 Video signal connector, audio line-in receptacle and DC-IN are located on the back side of the cabinet. 1.3 OSD menu includes the following function; AUTO IMAGE ADJUST CONTRAST / BRIGHTNESS AUDIO MENU COLOR ADJUST INFORMATION MANUAL IMAGE ADJUST SETUP MENU MEMORY RECALL 1.
4-3. ELECTRICAL SPECIFIC ATIONS 3.1 Standard conditions Display area 338 x 270 Video signal 0.7 Vpp Contrast Max. Brightness Max. Ambient 20 +/- 5 C Input AC Warming up > 30 Display 1280 x1024 3.2 POWER 3.2.1 Power supply Input voltage 90~240 Volts Power frequency 50 / 60 Hz, +/-3 Hz Input current < 1.5 Arms @90Vac < 0.75Arms @265Vac Inrush current 90A(Max) at 230Vac Power consumption 48W(Max) Output Voltage 3.2.2 @0-4.
State Power Indicator On 48Watts Green Standby <3Watts Amber Off <3Watts None
4-4. SIGNAL CABLE: Signal cable with Mini D-Sub 15P connectors at both ends . Length: 1.8 meter. 4-5.
(35) (36) (37) ESTABLISHED TIMING I: 720 x 400 @ 70Hz (VGA, IBM) 640 x 480 @ 60Hz (MAC II, Apple) 640 x 480 @ 67Hz (VESA) 640 x 480 @ 72Hz (VESA) 640 x 480 @ 75Hz (VESA) 800 x 600 @ 56Hz (VESA) 800 x 600 @ 60Hz (VESA) ESTABLISHED TIMING II: 800 x 600 @ 72Hz (VESA) 800 x 600 @ 75Hz (VESA) 832 x 624 @ 75Hz (MAC II, Apple) 1024 x 768 @ 60Hz (VESA) 1024 x 768 @ 70Hz (VESA) 1024 x 768 @ 75Hz (VESA) 1280 x 1024 @ 75Hz (VESA) Manufacturer's Reserved Timing: 1152 x 870 @ 75Hz (38-53)
VERTICAL: Active Time = 1024 lines Blanking Time = 42 lines Sync Offset = 1 lines Sync Pulse Width = 3 lines Border = 0 lines Frequency = 60.
a) Clock Generation : Crystal Input Clock (TCLK and XTAL). This is the input pair to an internal crystal oscillator and corresponding logic. A 14.318 MHz crystal is recommended. b) Hardware Reset ( Pin 17): Hardware Reset signal is generated by MAX6326 (U5).It asserts a reset signal for at least 100 ms. c) Analog to Digital Converter: The gm2121 chip has three ADC's (analog-to-digital converters), one for each color (red, green and blue) .
f) Panel Power Sequencing ( PPWR, PBIAS) ( Pin 40~41) : The gm2121 has two dedicated outputs PPWR and PBIAS ( Pin113 and Pin114) to control LCD power sequencing once data and control signals are stable. g) Parallel ROM Interface Port (Pin 1~6, Pin 139~160: The gm2121 has parallel ROM interface port, Pin139~156 for address bus, pPin1~6, Pin159 and Pin160 for data bus. h) Panel interface (Pin 48~57, Pin64~73): The gm2121 driver interface is highly programmable.
1.6 Adapter This is a general purpose AC / DC adapter which converts 90~240 Vac to a stabilized DC, 12V with rated output current of 4.16A. Electrical specification described as below.
5. Adjusting Procedure OSD Function Menu 5-1. Main Menu Press “1” Button (Menu Button) to enter Main Menu: Press Up Button to the previous page or Down Button to the next page. Press “1” Button to exit Main Menu. (1) Auto Image Adjust Page: Press “2” Button to do auto image adjust function. Press “1” Button to exit the page. (2) Contrast/Brightness Page: Press “2” Button to enter Contrast Item. Press “1” Button to exit the page. 1) Contrast Item Press up Button to make contrast high.
Press Up Button to the previous item or Down Button to the next item. 1) H./V. Position Item Press “2” Button to enter H./V. Position item. Press “1” Button to exit H./V. Position item. a) Horizontal Position Option: Press “2” Button to enter the Vertical Position option. Press “1” Button to exit Horizontal Position option. Press Up Button to make current option high. Press Down Button to make current option low b) Vertical Position Option: Press “2” Button to enter the Horizontal Position option.
Enable, Disable Option Press “2” Button to select the option. Press “1” Button to exit the option Press Up Button to the previous option or Down Button to the next option. 3) OSD Position Item Press “2” Button to enter OSD Position item. Press “1” Button to exit OSD Position item. a) Horizontal Position Option Press “2” Button to enter the Vertical Position option. Press “1” Button to exit Horizontal Position option. Press Up Button to make current option high.
Press Down Button to enter the Brightness Dialog. Press “1” Button to exit the Brightness Dialog. Press “2” Button to enter the Contrast Dialog. Press Up Button to make brightness high. Press Down Button to make brightness low. (3) Volume Dialog Press Left Button or Right Button to enter the Volume Dialog . Press “1” Button to exit the Volume Dialog. Press Left Button to make volume low. Press Right Button to make volume high. (4) Mute Dialog Press Mute Button to switch mute to volume or volume to mute.
6. Trouble Shooting Flow Chart 6.1 No power No Power Power Cord OK? Change Power Cord Adaptor OK? 12V OK? Change Adaptor Fuse1, L16, L17, CN6 Open? Change open component Change open component +5V OK? L18, L19, D3, Q7, R68 OK? Change U6 +3.3V OK? L21, R71, R73 OK? Change NG component Change U8 or Check U2 +2.
6.2 Always show NO SIGNAL No signal NG Change VGA Cabl e Check VGA Cable OK NG Change CN7 Check CN7 OK NG Change NG component Check H,V syncinput circuit OK Change U2 6.
6.4 White screen White Screen NG Change LCD Cable Check LCD cable OK NG Change CN5 Check CN5 OK NG Change NG component Check L22, Q9 OK NG Change NG component Check Q10, R98, R76 OK NG Change U2 OK Check U2 Change Panel 6.
7. Recommended Spare Parts List VG700b-2 Recommended Spare Parts List Item 1 2 3 4 5 6 7 8 9 10 a 10 b 11 12 13 14 15 16 17 18 19 20 ViewSonic P/N B-IF-0222-0050 B-SB-0221-0568 P-BX-0601-0898 P-FM-0602-0542 P-FM-0602-0543 M-MS-0808-8981 M-MS-0808-9232 A-CD-VG700B-2-B C-BC-0302-0543 M-CV-0830-2371 C-FP-0301-0969 M-CV-0830-2377 M-SCW-0824-0795 M-LCD-0826-0213 A-AD-0114-0205 E-FS-0410-0108 A-PC-0106-0224 M-LCD-0824-0181 C-BC-0302-0475 C-BS-0303-0393 B-IF-0222-0051 ViewSonic Corporation Ref.
VG700b-2 BOM Parts List Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 ViewSonic P/N #N/A B-IF-0222-0050 B-IF-0222-0051 #N/A #N/A E-IC-0401-2651 E-IC-0401-2652 #N/A E-IC-0401-2653 E-IC-0401-2654 #N/A E-IC-0401-2655 #N/A #N/A #N/A E-Q-0402-1580 E-Q-0402-1582 E-D-0403-2082 E-D-0403-2083 E-D-0403-2084 E-D-0403-2085 #N/A #N/A #N/A #N/A #N/A #N/A #N/A Ref.
Item 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 ViewSonic P/N M-MS-0808-7694 M-MS-0808-7695 #N/A M-MS-0808-7697 M-MS-0808-7698 E-L-0407-1562 E-L-0407-1563 #N/A #N/A C-FP-0301-0969 M-MS-0808-8718 M-MS-0808-8719 M-MS-0808-8985 C-BC-0302-0543 C-BC-0302-0475 M-CV-0830-2484 M-SCW-0824-0725 M-BK-08
Item 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 ViewSonic P/N M-FC-0809-0777 M-FC-0809-0795 #N/A M-MS-0808-8981 P-FM-0602-0542 P-FM-0602-0543 M-LB-0813-0747 A-CD-VG700B-2-B P-BX-0601-0898 #N/A M-LB-0813-0745 M-LB-0813-0746 B-SB-0221-0503 #N/A PL-BT-0706-0126 M-MS-0808-7695 PL-BT-0706-0127 Ref.
8.
VG700b-2 Exploded Parts List Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 ViewSonic P/N C-BC-0302-0475 M-CV-0830-2484 M-LCD-0826-0213 M-BK-0805-0024 M-MS-0808-7709 M-SCW-0824-0728 M-SCW-0824-6759 M-SCW-0824-6760 M-SCW-0824-6761 M-MS-0808-8986 M-MS-0808-8987 M-BK-0805-0025 M-BK-0805-0026 M-MS-0808-8988 M-MS-0808-8989 M-MS-0808-8990 M-MS-0808-8991 M-MS-0808-7706 E-SK-0412-0081 M-SCW-0824-6758 M-CV-0830-2372 M-C
9. Block Diagram 9.1 Video EEPROM 24C16 (5) Key pad Crystal 14. 318MHz X1 Flash ROM W39F010P (U4) Reset Max6326 (U3) Clock Generation Micro Controller OSD controller VGA Input D-sub 15pin (CN7) Triple ADC Image Capture DDC 24C21 (U9) Zoom/ Shrink/ Filter Brightness /Contrast/ Real Color Gamma control GM2121 (U2) Dual LVDS Transmitter Panel Output Data Path 9.2 Audio Mute Speaker Assy Volume Control Out put connector (CN4) TPA3003D2 (U1) Li nein (CN3) 9.
VG700b-2 Input Connector Confidential – Do Not Copy TOP LEVEL gm2121 Display RED+ REDGREEN+ GREENBLUE+ BLUE- RED+ REDGREEN+ GREENBLUE+ BLUE- GPO1 GPO2 GPO1 GPO2 Mute_F HS VS HCLK HFSn VGA-EN HS VS HCLK HFSn HCLK HFSn VGA-EN MUTE LCD_ON/OFF GPIO10 GPIO9 GPIO8/IRQINn GPIO21/IRQn GPIO7 GPIO6 GPIO3/TIMER1 GPIO2/PWM2 GPIO1/PWM1 GPIO0/PWM0 MUTE LCD_ON/OFF MUTE LCD_ON/OFF GPIO10 GPIO9 GPIO8/IRQINn GPIO21/IRQn GPIO7 GPIO6 GPIO3/TIMER1 GPIO2/PWM2 GPIO1/PWM1 GPIO0/PWM0 GPIO10 GPIO9 GPIO8/IRQINn GPI
VG700b-2 INPUT CONNECTOR +5V 1 D4 DAN202U 10K/ 6 R79 R99 R100 100/6 100/6 HFSn 4 HCLK 4 16 10K/6 R78 GND 47K/ 6 0.1u/6 R77 C106 CN7 Updated in 4/16 11 1 6 2 7 3 8 4 9 5 10 12 VGA_SDA R83 100/6 13 U9 14 8 7 6 5 100/6 VGA_SCL R91 100/6 R80 R81 R82 R84 R85 R86 C107 C108 C109 C110 C111 C112 0.01u/6 0.01u/6 0.01u/6 0.01u/6 0.01u/6 0.01u/6 RED+ 4 RED- 4 GREEN+ 4 GREEN- 4 BLUE+ 4 BLUE- 4 GND 3 3 22/6 56/6 22/6 56/6 22/6 56/6 28 17 DB15HD D5 D6 5.6V 5.
MAIN BOARD +3.3V 117 119 120 118 GND 2.5V_AVDD_LV Close to respective power pins 2.5V_VDD C70 C77 0.1u/6 C76 0.1u/6 C75 0.1u/6 C74 0.1u/6 C81 220P/6 C80 0.1u/6 GPIO5/UART_DO R49 GPIO4/UART_DI R50 HFSn HCLK RMADDR15 RMADDR14 RMADDR9 RMADDR8 +5V 3 U3 VCC MAX6326UR29 R58 2 R59 GND GND U5 A0 A1 A2 GND VCC WP SCL SDA R60 10K/6 R61 10K/6 0.1u/6 C85 +5V 1 2 3 4 8 7 6 5 AT24C16-10SC-1.
DISPLAY 3.3V_DVDD 3.3V_DVDD R9 LCD_ON/OFF KEY_DOWN KEY_SEL KEY_RIGHT KEY_UP KEY_ESC KEY_LEFT +5V 470/6 470/6 Mute_F 1 0.1u/6 0.1u/6 0.1u/6 0.1u/6 C11 C12 C13 C14 0.1u/6 0.1u/6 C9 C10 0.1u/6 0.1u/6 C7 C8 1 R6 0/6 GND R15 4 PBIAS Volume_Adj 47K/6 2 R17 10K/6/NS 1u/8 Volume_Adj 8 +5V 12V 3 1 L1 CX000800000/1206 CN1 GND C1 1 C4 GND 2 GND 4.7K/6/NS 1 R4 +5V 2 VOLU GND Q5 MMST3906 4.7K/6/NS Q3 CN2 1 2 3 4 5 6 7 8 9 10 11 4401-11-11P-R 3 R37 4.
+5V VG700b-2 Panel_Power R74 47K/6 3 Q10 1MMBT3904L 2 3 SI2301DS R98 10K/6 Confidential – Do Not Copy 4.7K/6 CX000800000/1206 0.1u/6 1 C105 0.1u/6 1u/8 0/6/NS C104 330u/ 16V R76 4 PPWR L22 C103 R75 2 LCDVCC C102 Q9 GND GND GND GND +12V1 POWER D1 1SS355 C87 1u/8 BOOST U6 R63 +12V 0/1206 FUSE1 7 L17 2 6 CX000800000/1206 0.1u/6 5 VCC CF FB GND Q7 2 3 R64 47/6 R65 330K/6 D2 4 1SS355 C92 R66 AIC1563 C91 C90 330u/16V *330u/16V C93 C89 0.
VG700b-2 Audio 12V +12V_amp CX000800000/1206 SD Confidential – Do Not Copy 0.1u/6 C19 C17 1nF/6 L6 CX000800000/1206 L5 37 ROSC VOL AGND AGND AGND VCLAMPL 31 C32 22u/25V 32 30 29 C34 0.1u/6 28 C35 220P/6 27 R42 L8 CX000800000/1206 GND 120K/6 GND AGND 26 25 C36 AGND 1u/8 CN4 SPKRO+ SPKROSPKLO+ SPKLO- 1 2 3 4 0.01u/6 0.1u/6 4501-04-04P-R +12V_amp C42 +12V_amp C39 L10 C44 1nF/6CX000800000/1206 0.1u/6 0.01u/6 L9 CX000800000/1206 C43 1nF/6 C38 1 C41 2 C40 22u/25V 4.
VG700b-2 I/O INTERFACE CN1 4401-11-11P-R 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10 11 11 2 4 HDK632A POWER SW2 1 3 2 4 SELSE HDK632A SW3 1 3 2 4 RIGH HDK632A Confidential – Do Not Copy SW1 1 3 SW4 1 3 orange A2 HDK632A C 1 3 2 4 UP 2 4 DOWN SW5 HDK632A 33 A1 SW6 green 1 3 2 4 LEFT 2 4 MENU HDK632A SW7 1 3 HDK632A SW8 1 3 2 4 HDK632A H1 2 3 4 5 H2 1 9 8 7 6 MTH276D126 2 3 4 5 1 9 8 7 6 MTH276D126 ViewSonic Corporation LED1 EL-209-2EGW
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*Readers Response* Dear Readers: Thank you in advance for your feedback on our Service Manual,which allows continuous improvement of our products. We would appreciate your completion of the Assessment Matrix below, for return to ViewSonic Corporation. Assessment A.What do you think about the content after reading VG700b-2 Service Manual? U nit Ex cellent Fair G ood Bad 1. Precautions And Safety Notices 2. Specification 3. Front Panel Function Control Description 4. Circuit Description 5.
