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Repair tips

Electronic appliance repair tips database - TV (LCD,TFT,Plasma,Digital), Monitor, VCR, DVD recorder and player, Digital camera, Audio equipment, Microwave ovens, Phone systems, Computer repair

MakeModelProblemSolutionDate
Found: 4551
PhilipsMD1.1EDead with mains fuse blown & chopper Tr s/cArcing positor caused it14-09-04
PhilipsMD1.1EEasy way to check the Power SupplyEasy way to check the Power Supply---------------------------------- The MC44603 can be checked for basic operation without the set being connected to the Mains supply. Method: 1) Discharge the 300V smoothing Capacitor. 2) Connect a BYD33D Diode to14-09-04

PhilipsMD1.1EError in Product Survey 1997-3Error in Product Survey 1997-3 28PT5001/02B is incorrectly referred to as styling 149. The correct styling for 28PT5001/02B is styling 103. This styling is published in Styling Yearbook 1996-4 (4822 727 21505)14-09-04
PhilipsMD1.1EErrors in characters with GERMAN or TURKISH teletextReplace the uP by one of the following uPs: VERSION...LANGUAGES...SERVICE CODE NUMBER M12BA1-4.0...F-D-NL-I...4822 900 10988 succ. of uPs with idents 3161, 3199, 3229 and uP SV02-M11C1-43 M12BA2-4.0...SW-DK-N-FI...4822 900 10984 successor of uPs w14-09-04
PhilipsMD1.1EErrors with characters in German TeletextReplace the microprocessor by version MID15-3.9 (ident 3259) The service code of this microprocessor is 4822 209 13579. REMARKS :THIS SOLUTION IS NOT VALID FOR TURKEY!!! IN TURKEY uP MID15-3.9 CANNOT BE USED.14-09-04
PhilipsMD1.1Eexcessive heightreplace SMD C2137 with 22pF (532212614103)14-09-04
PhilipsMD1.1EFaulty colour areasCheck and replace if necessary PTC 3506; 4822 117 12027 14-09-04
PhilipsMD1.1EFlyback lines across top third of picTr7400 BC327A on Tesla panel - next to fop heatsink14-09-04
PhilipsMD1.1EFlyback lines visible or no picture at allFLYBACK LINES Check and replace if necessary the following components on the Tesla module (On LSP panel, near supply for the frame deflection): C2400 22uF 4822 124 41596 D6400 BAV21 4822 130 30842 When there is no picture at all, also c14-09-04
PhilipsMD1.1EGreen picture with flyback lines and then set switches off.1. Voltage on cathode green was 30V due to T7342 (BF423; 4822 130 41646) leakage. 2. Check and replace if necessary diode D6304 (BAV21) on picture tube panel (4822 130 30842)14-09-04
PhilipsMD1.1EHorizontal bars or blue picture with SECAM transcoding in PAL programShort-circuit R3193 on the SSP-panel REMARKS :introduced in production from week 9533 onwards for /01 sets14-09-04
PhilipsMD1.1EHow to enable/disable "Child Lock"Press "MENU" button on Remote Control. When the menu appears on the screen, you select "FEATURES" (this expression is language dependent) Within "FEATURES", the "CHILD LOCK" can be enabled or disabled.14-09-04
PhilipsMD1.1EHum in sound.Check and remount cable L28/S28 on the LSP/Audio module. 14-09-04
PhilipsMD1.1EIncorrect blanking, right side is partly black.Check and replace if necessary T7403 (5322 130 41982) on the 16:9 module.14-09-04
PhilipsMD1.1EInterference in picture on 182, 217, 238 and 495 MHz1. Use high quality antenna cables and connectors (in case of insufficient result, apply solution 2) 2. Add 3 SMD capacitors (parallel) on pos 2391 audio-module. 470pF; 5322 122 32268 220pF; 4822 122 31173 and 1,5pf; 5322.126.10225 14-09-04
PhilipsMD1.1EIntermittent coloured lines in picture.Check and replace if necessary IC7140 (TDA 4665; 4822 209 12635) 14-09-04
PhilipsMD1.1EIntermittent flicker in pictureCheck and replace if necessary zenerdiode 6360 (BZV86-2V0; 4822 130 81424)14-09-04
PhilipsMD1.1EIntermittent no audioCheck pin 12 of connector I46 on the Audio Module (SCL line). Look for a badly soldered (oxidated) pin 12. Resolder pin 12 if required.14-09-04
PhilipsMD1.1EIntermittent no colour and picture shifts to one sideThe fault was caused by the Chroma X-tal pos. nr. 1117 (4822 242 81809). The 4.43 Mhz X-tal in these sets is used within the Bimos I.C (TDA 8366) to provide a internal ref for the Horizontal and Vertical count circuits.14-09-04
PhilipsMD1.1EIntermittent no pictureCheck pin 12 of connector I46 on the Audio Module (SCL line). Look for a badly soldered (oxidated) pin 12. Resolder pin 12 if required.14-09-04
PhilipsMD1.1EIntermittent no picture and/or soundCheck pin 12 of connector I46 on the Audio Module (SCL line). Look for a badly soldered (oxidated) pin 12. Resolder pin 12 if required.14-09-04
PhilipsMD1.1EMD1.1E LOT SURVEY for AA SETSMD1.1E LOT SURVEY for AA SETS -------------------------------- CRT TYPE SERVICE CODE LOT REMARKS 21" 4822 140 10526 *) 25"BM 4822 140 10528 *) 14-09-04

PhilipsMD1.1EModificationModification From AG/QG06 onwards a new version of the BiMOS is used in all MD1.1E AA sets; TDA8366/N3 is replaced by TDA8366/N4. Therefore a number of components on the SSP has changed. In ALL MD1.1E AA sets: item 1117 becomes 4822 242 10692 4.414-09-04
PhilipsMD1.1EModificationModification A new Nicam L panel is introduced in the MD1.2E chassis. It will also be used in the MD1.1E chassis. It is fully compatible with the original panel. The service code of the new Nicam L panel is :4822 212 10919. REMARKS :The lay14-09-04
PhilipsMD1.1EMODIFICATION SM MD1.1E in diversity table A2MODIFICATION SM MD1.1E in diversity table A2 on page 15 ------------------------------------------------------- Diversity table A2 on page 15 of the SM MD1.1E AA is modified: Position 7420, column CRT04 (25/28"BM) and CRT05 (21"BM) must be BU2506DF (4814-09-04
PhilipsMD1.1EMoire in picture on certain channels (Ch6, Ch11, Ch24 and S12)Depending on the severity of the problem, a 3 phase solution is available. If the problem is not sufficiently solved by step 1, continue with 2, etc. 1. Use a high quality antenna cable 2. Add 3 SMD capacitors (in parallel) on position 2391 (Audio Mo14-09-04
PhilipsMD1.1ENo colour on off-air signals or via the scart inputs.C2143 sm 100nf leaky14-09-04
PhilipsMD1.1ENo colour on off-air signals or via the scart inputs. Teletext normal. Chip capacitor C2143 (100nF) was found to have an 82R leak which was dragging down the supply to pin 1 of the TDA4665 (IC7140) from 4v9 to 1v6. This stopped the chip from outputting the delayed R-Y & B-Y signals. A ceramic alternative mounted on the print side of the board restored normal pictures. 14-09-04
PhilipsMD1.1ENo colour or no colour after some timeCheck C2161 (via 3164 on pin 34 IC7119/TDA8366) whether voltage on pt 34 is much lower than 4.5V. Probably C2161 has leakage. Codenumber C2161 (100 nF 10% 125V) is 4822 126 13161.14-09-04
PhilipsMD1.1ENo colour, OSD and TXT OK.Check and replace if necessary item C2143 (100nF; 25V; 4822 126 13161)on the SSP.14-09-04
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