User manual PHILIPS 107T60 SERVICE MANUAL

[. . . ] 17" CRT Colour Monitor Chassis: V32 V32 107T6 Service Service Service Model: 107T60/00 Horizontal Frequencies 30 - 71KHz TABLE OF CONTENTS Description Page Important Safety Notice ----------------------------- 2 Technical Data -----------------------------------------3 Installations--------------------------------------------4 Warning and Notes-------------------------------------5 Troubleshooting----------------------------------------6 Mechanical Instructions----------------------------7 ~ 8 Electrical Instructions---------------------------------9 ~ 11 OSD Adjustments------------------------------------12 ~ 20 ISP (In System Programme)-----------------------21 ~ 23 DDC Instructions---------------------------------24 ~ 28 Hex Data of DDC 2B------------------------------29 ~ 32 Wiring Diagram-------------------------------------------33 Block Diagram---------------------------------------------34 Main Diagram & C. B. A. -----------------------------35 ~ 37 Description Page Video Diagram & C. B. A. ---------------------------38 ~ 40 Control Diagram & C. B. A. ----------------------------41 Waveform Diagram------------------------------42 ~ 44 Exploded View-------------------------------------------45 Spare Parts List ----------------------------------46 ~ 48 Recommended Parts List----------------------------49 Different Parts List-------------------------------50 ~51 Brief Circuit Description-------------------------52 ~ 55 General Product Specification------------------56 ~ 86 Repair Flow Chart--------------------------------87 ~ 93 LightFrame for Windows------------------------- -94~97 Repair Tips--------------------------------------------98 Safety Test Requirements---------------------------99 SAFETY NOTICE ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES. CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING. REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES Published by BCU Monitors Printed in Suzhou Copyright reserved Subject to modification M May. 18 2004 GB 3138 106 10382 2 107T6 CRT Go to cover page Important Safety Notice FOR PRODUCTS CONTAINING LASER : DANGERInvisible laser radiation when open. Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. The use of optical instruments with this product will increase eye hazard. Proper service and repair is important to the safe, reliable operation of all Philips Consumer Electronics Company** Equipment. [. . . ] Digital Circuit & Micro-controller 1 7 inch CRT Monitor TYPE :107T60/00 BRAND : PHILIPS 8639 000 15483 4 1 2004-04-19 2004-04-19 BRIEF CIRCUIT DESCRIPTION 53 107T6 CRT Go to cover page GENERAL DESCRIPTION V32 107T5, using 17 flat High Brightness CRT, are so-called Digital Controlled Auto-scan Color Display Monitor SAA4848, made by Philips, which incorporates with high resolution which can operate at horizontal scan frequency from 30KHz up to 71KHz, and vertical scan frequencies from 50 to 160 Hz. It adopts a brand new Demic IC Deflection and Micro-controller in one chip with 56 pins. The monitor is equipped with an embedded micro-controller (included in Demic IC), which can preset the required modes. It also provides many functions, such as digital adjustable picture, DDC2B, power management, sRGB, low emission, high immunity, ---- etc. The monitor complies with TCO99/TCO 03/MPRII low emission standard and also fulfill E2000 automatic power saving requirements, to reduce power consumption to less than 1 watts in power saving mode. The monitor also complies with VESA standard and energy star computer program initiated by the EPA. DESCRIPTION OF CIRCUIT DIAGRAM This description mainly introduces the functions including power supply, power saving management, horizontal / vertical deflection, video amplifier, and micro-controller, etc. POWER SUPPLY / POWER SAVING MANAGEMENT The monitor is designed to adopt switching mode power supply which can operate mains input from 90VAC to 264VAC. This switching power supply applies an IC TEA1507. The control scheme transforms a rectified voltage source into a multi-output voltages. The control concept exhibits many desirable properties such as inherent over-load protection, stable and fast system response. A current sense circuit (R3107/08/09, etc) is equipped for power limiting (90W) and safety reason on primary power supply circuit. Secondary feedback via a photo-coupler is used to obtain a stable output voltages. The secondary outputs supply all necessary voltages for deflection and video and micro-controller. Power transformer and peripheral ckt are same as 107T5. The main differences are 7153, which has been changed from L78L05ACZ in TO92 package to L7805CV in TO220 package, and 7151, which has been changed from BC338 to BC638, due to the larger load of +5V line because of the use of Demic IC which is supplied +5V. All rectified diodes on secondary site are without lead frame ( heat-sink), it gains some cost saving in thermal design, but the turn ratios of main transformer should be well determined to maintain an adequate voltage derating of primary switching MOSFET and secondary +190V rectified diode BYV26E (with better thermal performance). This is trade-off design in between. The other hand, a secondary DC power switch (tact sw) is adopted. A fixed resistor (3162), same as 107T5, is still used. . This monitor can save power consumption while no sync pulses and automatically recover to normal power-on when sync signals are detected by micro-controller. The power saving off mode still exists in new designed monitors, but suspend / stand-by mode are deleted due to patent infringement issue. During Off mode, LED will flash and all the output voltages of main power are reduced to a very low level, and the operating frequency also comes very low, and only the required voltage of Demic IC (+5V) is supplied. When the monitor is switched off it is actually in burst mode (< 1W). 1 7 inch CRT Monitor TYPE :107T60/00 BRAND : PHILIPS 8639 000 15483 4 2 2004-04-19 2004-04-19 54 107T6 CRT Go to cover page BRIEF CIRCUIT DESCRIPTION ! HORIZONTAL DEFLECTION / VERTICAL DEFLECTION / EHT GENERATOR HORIZONTAL DEFLECTION : The heart of horizontal/vertical deflection controller is Demic IC - SAA4848, which can offer a complete and efficient small signal sync processing for auto-sync monitors. [. . . ] Most TV receivers contain some type of emergency "Hold Down" circuit to prevent HV from rising to excessive levels in the presence of a failure mode. These various circuits should be understood by all technicians servicing them, especially since many hold down circuits are inoperative as long as the receiver performs normally. Unplug the ac line cord and connect a jumper between the two prongs of the plug. Measure the resistance value between the jumpered ac plug and all exposed cabinet parts of the receiver, such as screw heads, antennas, and control shafts. [. . . ]