Philips 107B7 manual Circuit description, Micro controller and deflection circuit Micro Controller

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17” CDT Color Monitor

107B7

5. Circuit description

5-1 Micro controller and deflection circuit

Micro Controller

The micro controller(IC101) core is a 80C51 type. The micro clock frequency of 12 Mhz is derived from the Xtal oscillator, which is running at 48MHz. The DDC interface is suitable to handle DDC2 by a modified hardware I2C-bus interface .Standard high current ports,3 ADC pouts with voltage inputs and 4 static standard 8 bit DAC outputs (low interference) and one PWM output for digital control application are implemented. The central processing unit (CPU) manipulates operands in two memory spaces. These are the 1024byte internal data memory(consisting of 256 bytes standard RAM and 768 bytes AUX-RAM) and 48K-byte internal program memory . The program memory of the SAA4849 consists of 48K bytes ROM.

The SAA4849P provides sync. Processing with full auto sync. Capability, a flexible SMPS block and an extensive set of geometry control facilities. Further the IC generates the drive waveforms for DC coupled vertical boosters to the TDA4863A.

H/V sync signals processor

The functions of the sync processor include polarity detection, H-SYNC & V-SYNC signals counting, Programmable SYNC signals output, free running signal generator. Pin52/Pin53 are for the H-SYNC and V-SYNC input. and the polarity are setting in the positive. When no signal input, the Pin49 will output a 75Hz V-SYNC free run signal. The Pin18/20will output a 60KHz H-SYNC free run signal. for the monitor testing use.

Reset Circuit(pin23)

There are three ways possible to invoke a reset and initialize the SAA4849 micro controller part:

Via power-on reset circuit

Via watchdog timer overflow(only micro controller reset)

Via deflection reset after start up(only micro controller reset)

The reset pin(pin23) is connected to a Schmitt trigger for nose reduction. A reset is accomplished by holding the Reset pin HIGH.

 

C145

5V

22U

 

 

+

 

 

 

 

R153

2.7K

RST Pin23

C102

0.1UF

22

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Contents Service Revision List Revision HistoryCDT Color Monitor 107B7 Important Safety Notice For Products Containing LaserMonitor Specifications ．POWER ConsumptionInternational Regulatory Specification Korea CanadaRED CRT Mexico SingaporePrecautions and notices Safety precautionsService notes CDT Color Monitor 107B7 Product safety noticeHigh voltage warning Pin No Description Operating instructionsGND Adjustment conditions and precautions AdjustmentMain adjustments Basic and simple instruction on the control keys OSD TreeCDT Color Monitor 107B7 CDT Color Monitor 107B7 Adjustment method CDT Color Monitor CDT Color Monitor 107B7 Relative placement of typical components Take 105G7 DDC writer for example 1.General System and equipment requirementsSUB connector Printer connector DC 12V input CDT Color Monitor 107B7 Enter, go into the next screen as shown Fig Enter into Fig Circuit description Sync signals processorReset Circuitpin23 Micro controller and deflection circuit Micro ControllerQuartz Oscillatorpin45,pin46 Ray protection+ Control Function Block CDT Color Monitor 107B7 Transistor & Diode and IC Circuit Location Description FunctionMechanical Instructions GeneralMain panel Remove Main board Remove Front frame CRT Relative Circuit Problems Trouble Shooting ChartNo Raster Abnormal Video Level On Screen Abnormal DDC Plug & PlayNo Signal On Screen CDT Color Monitor 107B7 Abnormal DisplayNo Raster Disconnect With Signal Cable Hor./Osc/Def/Hv Circuit FaultCDT Color Monitor 107B7 No Blanking Abnormal Horizontal Width Of Video CDT Color Monitor 107B7 Abnormal Horizontal DeflectionAbnormal Horizontal Linearity Poor Focus CDT Color Monitor 107B7 Abnormal Vertical ScanningSide-Pin Cushion Distortion Abnormal Vertical SizeCDT Color Monitor 107B7 Power Supply Trouble Shooting Chart Mechanical of cabinet front dis-assembly Spare parts List Main Board Location Part No. for TPV Description Philips P/N 12NCFerrite Bead 3*5*1.5 WireWIRE&CORE Ferrite BeadMgfr 470KOHM Mofr 0.75 OHMMgfr 270K OHM Mgfr 240K OHMCFR 56K OHM CFR 4.7 OHMCFR 5.6K OHM CFR 6.2K OHMCFR 470 OHM CFR 2.2K OHMCFR 2.4K OHM CFR 8.2K OHMCFR 120 OHM CFR 1K OHMCFR 1M OHM CFR 1.5 OHMNPO Key Board Location Part No for TPV Description Philips 12NC CRT Board Location Part No for TPV Description Philips 12NC CFR 560K OHM BAV21Signal Cable Different parts listPower Cord TZX8V2BBlock diagram Pincushion Size Control Blanking CircuitIC Block diagram SAA4849 IC102 M24C08 IC801 NT6812 GND Gnds N/C N/C VCC PCB Layout Main BoardCDT Color Monitor 107B7 Video Board Schematic diagram Power Output107B7 Video General Product Specification Scope General Product FeaturesPHL Product Range Standard Testing ConditionsVideo Signals Video Input Signals Destination Mains Magnetic Cabinet CordPreset & Preload Modes Timing Chart Preset video timings Video Driver SignalsDDC Signals Plug And PlayPolarity Timing Resolution 1024 x 1280 x Pixel clock Timing Resolution 640 x 720 x Pixel clockSync Polarity Timing Resolution 800 x 1024 x Pixel clock Frequency 31.469 kHz 43.269 kHz 31.468 kHz TotalPolarity Timing Resolution Timing ResolutionSync Polarity Timing Resolution Frequency 31.469 kHz 37.500 kHz 50.628 kHz TotalPolarity Power Supply 2.6.1 Features Timing Resolution 1152 x 1280 x Pixel clockPolarity Timing Resolution 1280 1600 x Pixel clock Power consumptionPower saving conditions Key R to L FunctionOSD menu LED indicatorOSD tree / English 1st level 2nd level 3rd level Front Of Screen Performance CRT characteristics Power connectorVideo input connector/Video cable Monitor status informationScreen Diagonal Size VendorCRT Type Number Screen & Mask Phosphor AreaOptical performance CD-ROM Accessories CablesUser’s manual Location of iconsResins Texture/Glossing of housingColor for resin/paint If paint is usedMovement of unit with base Product Dimensions / WeightTransportation test procedures Label16.1. Air shipment container loading Pallet / Container loading16.2. Sea shipment container loading for China & India 16.4. Truck loading for China Temperature16.3. Sea shipment container loading for other regions Reliability / Environment / TransportationEarth magnetic field North Hemispheric AltitudeAir pressure South HemisphericRED CRT Dnhw Mexico Sa = SafetyNEW-ZEALAND Israel RoHS TCO-99 TCO-03 MPR II / TCO107B70 Grey 107B75 Weee

107B7 specifications

The Philips 107B7 is a well-regarded monitor designed for users who prioritize both performance and health in their computing experience. Aimed at professionals and home users alike, this monitor integrates advanced technologies that enhance productivity while promoting eye comfort.

One of the standout features of the Philips 107B7 is its commitment to Eye Care technology. This monitor incorporates a range of innovations specifically designed to reduce eye strain, such as LowBlue Mode and Flicker-free technology. LowBlue Mode reduces the amount of harmful blue light emitted by the screen, which is known to cause discomfort during prolonged use. Flicker-free technology, on the other hand, eliminates flickering at all brightness levels, providing a stable image that helps prevent fatigue.

The monitor boasts a 21.5-inch display with a resolution of 1920 x 1080 pixels, delivering sharp and vibrant visuals. This Full HD resolution ensures that users can enjoy crisp images whether they’re working on spreadsheets, watching videos, or designing graphics. Additionally, the panel features wide viewing angles, which means that colors remain consistent even when viewed from off-angles, making it ideal for collaborative work.

In terms of connectivity, the Philips 107B7 offers a variety of options. Users can easily connect their devices via HDMI, DisplayPort, and VGA inputs. The inclusion of USB ports is also a significant advantage, allowing for easy connection of peripherals like keyboards, mice, and other accessories.

Another notable aspect of the Philips 107B7 is its ergonomic design. The monitor features a height-adjustable stand that enables users to customize the screen's position for optimal viewing comfort. This flexibility aids in maintaining good posture and reducing strain during long working hours.

With its sleek design and adaptive technologies, the Philips 107B7 is more than just a monitor; it is a tool for enhancing productivity while keeping health and comfort at the forefront. Whether for office use, creative tasks, or leisurely activities, this monitor is designed to meet a variety of needs in today’s dynamic workspace. By combining advanced features with user-friendly design, the Philips 107B7 stands out as a strong choice for anyone looking to upgrade their viewing experience.
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