Daewoo DTQ-14N2FC free download

File name Daewoo_CN-115I_DTQ-14N2FC.pdf

Service Manual Color Television CHASSIS : CN-115I NTSC-M SYSTEM MODEL: DTQ-14N2FC/FS/FSP DTQ-20N2FC/FS/FSP DTQ-14 J 2FC/FS/FSP D TQ-20J 2FC/FS/FSP DTQ-14N3FC/FS/FSP DTQ-20N3FC/FS/FSP DAEWOO ELECTRONICS CO., LTD. FEATURES FS (Frequency Synthesizer) Tuning System CATV Ready Monitor Look Design High Focus Minineck CRT ELECTRICAL SPECIFICATIONS POWER INPUT FC SERIES FS SERIES FSP SERIES POWER RATING 14" MODELS 20" MODELS INTERMEDIATE FREQUENCIES PICTURE IF CARRIER FREQUENCY SOUND IF CARRIER FREQUENCY COLOR SUB CARRIER FREQUENCY AUDIO OUTPUT RATING SPEAKER ANTENNA INPUT IMPEDANCE TUNING RANGES VHF UHF CATV AC 120V 60Hz AC 85V - AC 150V 60Hz AC 220V 50Hz/60Hz 60W 70W 45.75MHz 41.25MHz 42.17MHz 1.3W 2W 8 ohm VHF/UHF 75 ohm UNBALANCED 2 THRU 13 14 THRU 69 1 THRU 125 CONTENTS Safety Precautions Control View Important Service Notes Block Diagram General Adjustments Trouble Shooting Charts Description of Semiconductors Printed Circuit Board Diagram Exploded Views Schematic Diagram with Waveforms Parts List Option List 3 6 8 9 10 14 20 22 23 29 30 40 2 PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO VIDEO PRODUCTS CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. NEVER SUBJECT : X-RADIATION 950ART94 1009 PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACTURER S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANT RESULTING PROPERTY DAMAGE OR USER INJURY. SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION FROM A.C. LINE SHOCK. 1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTENTIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PICTURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERATION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIRCUMSTANCES, AMY PRODUCE RADIATION IN EXCESS OF DESIRABLE LEVELS. 2. ONLY FACTORY SPECIFIED C.R.T ANODE CONNECTORS MUST BE USED. DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD IN COLOR SETS. ALWAYS REINSTALL THEM. 3. IT IS ESSENTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRATION OF THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE STANDARD. SUCH AS THE ONE AVAILABLE AT YOUR DISTRIBUTOR. 4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY THERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY TIME A COLOR CHASSIS IS SERVICED, THE BRIGHTNESS SHOULD BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOES NOT EXCEED THE SPECIFIED VALUE AND THAT IT IS REGULATING CORRECTLY. WE SUGGEST THAT