Service Manual
Page 4
... cause harmful interference to part 15 of the FCC Rules. Always use a grounded power supply cord and the provided shielded video interface cable with the limits of a Class B digital device, pursuant to radio communications. Switzerland (SEV); Service Manual VA550 ViewSonic Corporation IBM and IBM products are registered trademarks of Apple Computer, Inc. Germany (VDE...
... cause harmful interference to part 15 of the FCC Rules. Always use a grounded power supply cord and the provided shielded video interface cable with the limits of a Class B digital device, pursuant to radio communications. Switzerland (SEV); Service Manual VA550 ViewSonic Corporation IBM and IBM products are registered trademarks of Apple Computer, Inc. Germany (VDE...
Service Manual
Page 5
...: Auto-Sync; Digital On Screen Display Controls User friendly controls (Power, Function, Select (+ / - ), Auto) allowing for picture perfect quality. Power Saving System This environmentally friendly product is a TFT LCD analog display that contains the following features. 1. DO NOT COPY Page 3 ViewSonic Corporation FEATURES Service Manual VA550 The VA550 is able to default settings. Color; Power Supply Support Ability to XGA, where...
...: Auto-Sync; Digital On Screen Display Controls User friendly controls (Power, Function, Select (+ / - ), Auto) allowing for picture perfect quality. Power Saving System This environmentally friendly product is a TFT LCD analog display that contains the following features. 1. DO NOT COPY Page 3 ViewSonic Corporation FEATURES Service Manual VA550 The VA550 is able to default settings. Color; Power Supply Support Ability to XGA, where...
Service Manual
Page 28
I/O I O I N.C. Service Manual VA550 THEORY OF CIRCUIT OPERATION The MTV112E pin functions are list below ViewSonic Corporation PIN# 1 2 3 4 5 6 7 8 9 10 ...O O I _ _ 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 SDA I2C...V-Sync 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 ...
I/O I O I N.C. Service Manual VA550 THEORY OF CIRCUIT OPERATION The MTV112E pin functions are list below ViewSonic Corporation PIN# 1 2 3 4 5 6 7 8 9 10 ...O O I _ _ 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 SDA I2C...V-Sync 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 ...
Service Manual
Page 29
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 - "1" key Description "-" key "2" key N.C. DO NOT COPY Page 27 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 -
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 - "1" key Description "-" key "2" key N.C. DO NOT COPY Page 27 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 -