Service Manual
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...; increase the separation between equipment and receiver; Thus, ViewSonic will void the user's authority to provide reasonable protection against harmful interference in a particular installation. Always use a grounded power supply cord and the provided shielded video interface cable with... regard to "Electromagnetic compatibility." Canada (CSA); Service Manual VA550 ViewSonic Corporation IBM and IBM products are registered trademarks of Video...
...; increase the separation between equipment and receiver; Thus, ViewSonic will void the user's authority to provide reasonable protection against harmful interference in a particular installation. Always use a grounded power supply cord and the provided shielded video interface cable with... regard to "Electromagnetic compatibility." Canada (CSA); Service Manual VA550 ViewSonic Corporation IBM and IBM products are registered trademarks of Video...
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... environmentally friendly product is a TFT LCD analog display that contains the following features. 1. Frequency Range Monitor can define display mode or reset to reduce power consumption by more than 90% in "Active Off' Mode. 4. LCD Adjust; ViewSonic Corporation FEATURES Service Manual VA550 The VA550 is able to default settings. Digital On Screen Display Controls User friendly controls (Power, Function, Select (+ / - ), Auto...
... environmentally friendly product is a TFT LCD analog display that contains the following features. 1. Frequency Range Monitor can define display mode or reset to reduce power consumption by more than 90% in "Active Off' Mode. 4. LCD Adjust; ViewSonic Corporation FEATURES Service Manual VA550 The VA550 is able to default settings. Digital On Screen Display Controls User friendly controls (Power, Function, Select (+ / - ), Auto...
Service Manual
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Service Manual VA550 SPECIFICATIONS ViewSonic Corporation Characteristic LCD Panel Maximum Viewing Angles Signal Input Connector Maximum Resolution Video Bandwidth Display Area Power Voltage Power Consumption Operating Conditions Storage Conditions Dimensions Weight Description ADI, 15.0 inch diagonal viewable screen, Anti-glare TFT Active Matrix Panel, 0.297 mm pixel pitch, TDK Inverter Left : 60° Right : 60° Up : 45...
Service Manual VA550 SPECIFICATIONS ViewSonic Corporation Characteristic LCD Panel Maximum Viewing Angles Signal Input Connector Maximum Resolution Video Bandwidth Display Area Power Voltage Power Consumption Operating Conditions Storage Conditions Dimensions Weight Description ADI, 15.0 inch diagonal viewable screen, Anti-glare TFT Active Matrix Panel, 0.297 mm pixel pitch, TDK Inverter Left : 60° Right : 60° Up : 45...
Service Manual
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... menu Value 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 ON/OFF ON/OFF CONFIDENTIAL - Power, Function, Select (+), Select (-), and Auto. ViewSonic Corporation ON SCREEN DISPLAY Service Manual VA550 OSD (On Screen Display) function is supported on the TFT LCD analog display and is controlled by four easy-to-use buttons; DO NOT COPY Page 5
... menu Value 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 0 - 100 ON/OFF ON/OFF CONFIDENTIAL - Power, Function, Select (+), Select (-), and Auto. ViewSonic Corporation ON SCREEN DISPLAY Service Manual VA550 OSD (On Screen Display) function is supported on the TFT LCD analog display and is controlled by four easy-to-use buttons; DO NOT COPY Page 5
Service Manual
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DO NOT COPY Page 9 ViewSonic Corporation MAIN BOARD I/O CONNECTIONS W04 CONNECTION (LEFT-) RIGHT) "OSD CONTROL" Pin Description 1 "-" Key 2 " Function " Key 3 "+" Key 4 Recall 5 LED 1 6 LED 2 7 Ground 8 Power 1 9 Power 2 Service Manual VA550 W05 CONNECTION (TOP--> BOTTOM) "INVERTER CONTROL" Pin Description 1 +12V 2 Ground 3 V Enable 4 CON 5 No Connection CONFIDENTIAL -
DO NOT COPY Page 9 ViewSonic Corporation MAIN BOARD I/O CONNECTIONS W04 CONNECTION (LEFT-) RIGHT) "OSD CONTROL" Pin Description 1 "-" Key 2 " Function " Key 3 "+" Key 4 Recall 5 LED 1 6 LED 2 7 Ground 8 Power 1 9 Power 2 Service Manual VA550 W05 CONNECTION (TOP--> BOTTOM) "INVERTER CONTROL" Pin Description 1 +12V 2 Ground 3 V Enable 4 CON 5 No Connection CONFIDENTIAL -
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CONFIDENTIAL - ViewSonic Corporation MAIN BOARD I/O CONNECTIONS Service Manual VA550 WO7 CONNECTION "VIDEO SIGNAL OUT To LCD PANEL" Pin Description 61 Ground 62 Ground 63 V Sync Signal 64 Ground 65 Data Enable Signal 66 H Sync Signal 67 Ground 68 Ground 69 Dot Clock 70 Dot Clock Pin Description 71 Ground 72 Ground 73 Power of LCD 74 Power of LCD 75 Power of LCD 76 Power of LCD 77 N.C. 78 N.C. 79 N.C. 80 N.C. DO NOT COPY Page 11
CONFIDENTIAL - ViewSonic Corporation MAIN BOARD I/O CONNECTIONS Service Manual VA550 WO7 CONNECTION "VIDEO SIGNAL OUT To LCD PANEL" Pin Description 61 Ground 62 Ground 63 V Sync Signal 64 Ground 65 Data Enable Signal 66 H Sync Signal 67 Ground 68 Ground 69 Dot Clock 70 Dot Clock Pin Description 71 Ground 72 Ground 73 Power of LCD 74 Power of LCD 75 Power of LCD 76 Power of LCD 77 N.C. 78 N.C. 79 N.C. 80 N.C. DO NOT COPY Page 11
Service Manual
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... color TFT LCD display. Power saving will trigger the mode detection function such that include; audio volume, contrast, brightness, color, HN position, and H size. In addition, the preset values determine; CONFIDENTIAL - Each TFT LCD display uses the 24LC21 (IC14) chip to provide DCCITM and DCC2BTM with TLC2933 (IC03). ViewSonic Corporation THEORY OF CIRCUIT OPERATION Service Manual VA550 The VA550 is...
... color TFT LCD display. Power saving will trigger the mode detection function such that include; audio volume, contrast, brightness, color, HN position, and H size. In addition, the preset values determine; CONFIDENTIAL - Each TFT LCD display uses the 24LC21 (IC14) chip to provide DCCITM and DCC2BTM with TLC2933 (IC03). ViewSonic Corporation THEORY OF CIRCUIT OPERATION Service Manual VA550 The VA550 is...
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ViewSonic Corporation THEORY OF CIRCUIT OPERATION Service Manual VA550 This Product supports timing from VGA to XGA, so the pixel rate is from 25 MHz to low level. The fine tune control is a 128x 8 bits EEPROM. The 24LC21 is a PWM signal. Upon power up, this device will be in the Transmit Only mode, sending...
ViewSonic Corporation THEORY OF CIRCUIT OPERATION Service Manual VA550 This Product supports timing from VGA to XGA, so the pixel rate is from 25 MHz to low level. The fine tune control is a 128x 8 bits EEPROM. The 24LC21 is a PWM signal. Upon power up, this device will be in the Transmit Only mode, sending...
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... I N.C. N.C. I/O I O I Description SDA of I2C for communication with ICS1523 SCL of I2C for communication with ICS1523 Power switch of +5V and VLCD Fine tune function select H-Sync polarity V-Sync polarity Inverter enable AM100 Rest signal MPU Rest signal ...from composite sync Oscillator output Oscillator input Negative Power Supply Reserve SDA of I2C for communication with AM100 SCL of I2C for communication with AM100 Reserve '+" key Page 26 CONFIDENTIAL- Service Manual VA550 THEORY OF CIRCUIT OPERATION The MTV112E pin functions are list below ViewSonic Corporation PIN# 1 2 3 4 5...
... I N.C. N.C. I/O I O I Description SDA of I2C for communication with ICS1523 SCL of I2C for communication with ICS1523 Power switch of +5V and VLCD Fine tune function select H-Sync polarity V-Sync polarity Inverter enable AM100 Rest signal MPU Rest signal ...from composite sync Oscillator output Oscillator input Negative Power Supply Reserve SDA of I2C for communication with AM100 SCL of I2C for communication with AM100 Reserve '+" key Page 26 CONFIDENTIAL- Service Manual VA550 THEORY OF CIRCUIT OPERATION The MTV112E pin functions are list below ViewSonic Corporation PIN# 1 2 3 4 5...
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"1" key Description "-" key "2" key N.C. ViewSonic Corporation THEORY OF CIRCUIT OPERATION Service Manual VA550 PIN# 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Name D12/P2.5 D11/P2.6 D10/P2.7 STOUT/P4.2 D9 D8 D7 D6 D5 D4 D3 D2 D1 DO VDD TYPE I I I O O O _ O O O 0 O O - LED 2 LED 1 Video offset control Reserve External H-Sync cutoff control Video gain control Sync on green /separate or composite select V-Sync select (VBK/external V-Sync) Free run mode enable Power of inverter on/off control Positive Power Supply CONFIDENTIAL - DO NOT COPY Page 27
"1" key Description "-" key "2" key N.C. ViewSonic Corporation THEORY OF CIRCUIT OPERATION Service Manual VA550 PIN# 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Name D12/P2.5 D11/P2.6 D10/P2.7 STOUT/P4.2 D9 D8 D7 D6 D5 D4 D3 D2 D1 DO VDD TYPE I I I O O O _ O O O 0 O O - LED 2 LED 1 Video offset control Reserve External H-Sync cutoff control Video gain control Sync on green /separate or composite select V-Sync select (VBK/external V-Sync) Free run mode enable Power of inverter on/off control Positive Power Supply CONFIDENTIAL - DO NOT COPY Page 27
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... control the 5V `s ON/OFF status. They are two regulators that convert the 12 V to achieve the voltage regulation effects. CONFIDENTIAL - ViewSonic Corporation THEORY OF CIRCUIT OPERATION Service Manual VA550 POWER SYSTEM L32 8410102 012 4700 25V IC18 1RF7304 C24 470u .12V :\ / C 08 R78 1K (1206) - 17 G1 D S2 D2... the CPU and SYNC processor, so it creates a pulse through pin 3 of IC25 will make the output of the required power for the VA550 and LCD panel. There are +5Vx and Vlcd. IC30 (4013) is a D-Flip-Flop CMOS and IC18 is pressed, pin3 of IC30 high and IC18...
... control the 5V `s ON/OFF status. They are two regulators that convert the 12 V to achieve the voltage regulation effects. CONFIDENTIAL - ViewSonic Corporation THEORY OF CIRCUIT OPERATION Service Manual VA550 POWER SYSTEM L32 8410102 012 4700 25V IC18 1RF7304 C24 470u .12V :\ / C 08 R78 1K (1206) - 17 G1 D S2 D2... the CPU and SYNC processor, so it creates a pulse through pin 3 of IC25 will make the output of the required power for the VA550 and LCD panel. There are +5Vx and Vlcd. IC30 (4013) is a D-Flip-Flop CMOS and IC18 is pressed, pin3 of IC30 high and IC18...
Service Manual
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... amplifier (IC31) output R,G,B is normal Check IC31 clamping signal (pin19) input signal (pin2, 6, 11) and Vcc ViewSonic Corporation heck the A/ convertor (IC08) is lighted ? Check the PLLO (IC09) is OK? Power Saving 1 N Check if the power is OK L 1 Check the video cable Y and check if the Hsync or V-sync is over specifications I CKL...
... amplifier (IC31) output R,G,B is normal Check IC31 clamping signal (pin19) input signal (pin2, 6, 11) and Vcc ViewSonic Corporation heck the A/ convertor (IC08) is lighted ? Check the PLLO (IC09) is OK? Power Saving 1 N Check if the power is OK L 1 Check the video cable Y and check if the Hsync or V-sync is over specifications I CKL...
Service Manual
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... L35 L23 ZD04 ZD02, ZD03 E-Q-0402-1087 TRANSISTOR MMB3904LT1 SMD T Q02, Q03, Q10, Q12-Q14, Q19, Q20 E-Q-0402-0456 POWER MOS IRF7304 SMD 8PIN E-IC-0401-0886 E-IC-0401-0946 E-IC-0401-0949 E-IC-0401-1245 E-IC-0401-1888 E-IC-0401-...1 1 5 1 1 2 8 4 1 1 1 1 2 1 1 2 1 1 1 1 1 1 1 1 CONFIDENTIAL - DO NOT COPY Page 43 ViewSonic Corporation SPARE PARTS LIST Service Manual VA550 VIEWSONIC PN DESCRIPTION E-R-0405-0614 RES. CF 4.7ohm 1/8W J 1206 PCB MAIN BD 204*121*1.6T FR4 4M PCB DISPLAY BD K1 147.75*19.5*1.6T LCD MODULE 15.0" TFT AA150XA03 (ADI) PICO FUSE 125V 3.5A 3*7mm (R25103.5) AC...
... L35 L23 ZD04 ZD02, ZD03 E-Q-0402-1087 TRANSISTOR MMB3904LT1 SMD T Q02, Q03, Q10, Q12-Q14, Q19, Q20 E-Q-0402-0456 POWER MOS IRF7304 SMD 8PIN E-IC-0401-0886 E-IC-0401-0946 E-IC-0401-0949 E-IC-0401-1245 E-IC-0401-1888 E-IC-0401-...1 1 5 1 1 2 8 4 1 1 1 1 2 1 1 2 1 1 1 1 1 1 1 1 CONFIDENTIAL - DO NOT COPY Page 43 ViewSonic Corporation SPARE PARTS LIST Service Manual VA550 VIEWSONIC PN DESCRIPTION E-R-0405-0614 RES. CF 4.7ohm 1/8W J 1206 PCB MAIN BD 204*121*1.6T FR4 4M PCB DISPLAY BD K1 147.75*19.5*1.6T LCD MODULE 15.0" TFT AA150XA03 (ADI) PICO FUSE 125V 3.5A 3*7mm (R25103.5) AC...
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DO NOT COPY Page 49 ViewSonic Corporation COMPLETE PARTS LIST Service Manual VA550 MODULE NO: B-MB-0201-0456 LCD 15.0" MAIN BD ASS'Y (VG150B ) NO M/S VIEWSONIC PN DESCRIPTION 104 M E-D-0403-0477 ZENER 15-2 14.5-15.1V 1/2W 105 M E-D-0403-0477 ZENER 15-2 14.5-15.1V 1/2W 106 M E-D-0403-0475 ZENER ... 124 M M-MS-0808-1765 125 M M-MS-0808-2928 WAFER 2.00MM 5P 90' KINK CONN. B TO B FX8C 80P F.M (FX8C-80SSV) 126 M M-MS-0808-3939 DC POWER JACK (2DC-00341-100) 127 M E-X-0415-0049 X'TAL 11.0592MHZ 128 M E-C-0404-1832 C/M MULTI 47PF 50V NPO 0805 129 M E-C-0404-3198 E/C GEN. 1.0UF 50V RV2...
DO NOT COPY Page 49 ViewSonic Corporation COMPLETE PARTS LIST Service Manual VA550 MODULE NO: B-MB-0201-0456 LCD 15.0" MAIN BD ASS'Y (VG150B ) NO M/S VIEWSONIC PN DESCRIPTION 104 M E-D-0403-0477 ZENER 15-2 14.5-15.1V 1/2W 105 M E-D-0403-0477 ZENER 15-2 14.5-15.1V 1/2W 106 M E-D-0403-0475 ZENER ... 124 M M-MS-0808-1765 125 M M-MS-0808-2928 WAFER 2.00MM 5P 90' KINK CONN. B TO B FX8C 80P F.M (FX8C-80SSV) 126 M M-MS-0808-3939 DC POWER JACK (2DC-00341-100) 127 M E-X-0415-0049 X'TAL 11.0592MHZ 128 M E-C-0404-1832 C/M MULTI 47PF 50V NPO 0805 129 M E-C-0404-3198 E/C GEN. 1.0UF 50V RV2...
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... CF 4.7ohm 1/8W J 1206 L22 CHIP BEAD CORE 80ohm (FCM1608K- 800T07) L23 RES. Service Manual VA550 COMPLETE PARTS LIST ViewSonic Corporation MODULE NO: B-MB-0201-0456 LCD 15.0" MAIN BD ASS'Y (VG150B ) NO M/S VIEWSONIC PN DESCRIPTION 259 M E-IC-0401-0886 IC MM74HC00M SMD-14 LOC IC06 260 M E-IC-0401-1247 ... 264 M E-IC-0401-1717 IC MM74HC4053WMX SMD 16PIN IC16 265 M E-IC-0401-0946 IC 74HC86AFN SMD-14 T IC17 266 M E-Q-0402-0456 POWER MOS IRF7304 SMD 8PIN IC18 267 M E-Q-0402-0456 POWER MOS IRF7304 SMD 8PIN IC19 268 M E-IC-0401-0889 IC LM339M SMD-14 T IC20 269 M E-Q-0402-0456...
... CF 4.7ohm 1/8W J 1206 L22 CHIP BEAD CORE 80ohm (FCM1608K- 800T07) L23 RES. Service Manual VA550 COMPLETE PARTS LIST ViewSonic Corporation MODULE NO: B-MB-0201-0456 LCD 15.0" MAIN BD ASS'Y (VG150B ) NO M/S VIEWSONIC PN DESCRIPTION 259 M E-IC-0401-0886 IC MM74HC00M SMD-14 LOC IC06 260 M E-IC-0401-1247 ... 264 M E-IC-0401-1717 IC MM74HC4053WMX SMD 16PIN IC16 265 M E-IC-0401-0946 IC 74HC86AFN SMD-14 T IC17 266 M E-Q-0402-0456 POWER MOS IRF7304 SMD 8PIN IC18 267 M E-Q-0402-0456 POWER MOS IRF7304 SMD 8PIN IC19 268 M E-IC-0401-0889 IC LM339M SMD-14 T IC20 269 M E-Q-0402-0456...