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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
PhilipsGR1AXSmeary, washed out picC2060 680µ in 12v supply14-09-04
PhilipsGR1AXSound low volD6715 5v1 zener leaky (adj to micro IC7700) & disc ceramic caps around sound if chip - C2033 22nF14-09-04

PhilipsGR1AXSound slow coming on aft channel changeT7046 ( BC558 )14-09-04
PhilipsGR1AXSOUND SLOW TO RETURN AFTER CHANNEL CHANGETR7046 SC14-09-04
PhilipsGR1AXSound varies with picture contentReplace wire link 9511 (near tuner) with a 6.2 volt zener diode BZX79-B6V2 (4822 130 34167) and change C2030 into 22uF (5322 124 41431) 14-09-04
PhilipsGR1AXSpare part informationSpare part information ---------------------- In service manual "GR1-AX Version 2" the specific partslist for the /58R is not mentioned. For this /58R use parts: position 1000: tuner UV917E/Phono; service code 4822 212 23696 positions 1600, 2606, 3603, 614-09-04
PhilipsGR1AXSt/by onlyC2631 22nF in st/by cct leaky14-09-04
PhilipsGR1AXSt/by only - 95v HT only 5vWith 100v ac I/p, HT = 80v ; any higher I/p shut down the set with pulsing reset line on micro; D6671 zener BZX79-F4V3 faulty14-09-04
PhilipsGR1AXTo check psu without LOP stage connectedDo not use 60w bulb as dummy load - psu will not start - ok to just dis coil L566014-09-04
PhilipsGR1AXTo over ride protection cctunsolder gate of THY6641 & SLOWLY power up via variac whilst monitoring HT at pin 6 of Loptx (should reach 95v) 14-09-04
PhilipsGR1AXTo release hotel mode ( child lock ) .Put set on programme 38 , press either store & pr - ( to lock ) & store & vol - ( to unlock ) , or , press pr - & vol + ( to lock & u14-09-04
PhilipsGR1AXTripped at sw on 95v HT present at LOPTrNo line drive - R3100 1R in 9v current sensing risen to 4R14-09-04
PhilipsGR1AXTuning - drift & flickering.Replace ZTK33B voltage stabiliser.14-09-04
PhilipsGR1AXTuning drift33v zener & dropper checked ok - was tuner14-09-04
PhilipsGR1AXTuning unstableVoltage on D 6702 is not stable. Check/replace D 6702 (ZTK33B; 4822 130 30959) 14-09-04
PhilipsGR1AXTwo lines going around.Check/replace C2606 (68 uF; 4822 124 41599). 14-09-04
PhilipsGR1AXUpdate Chassis manual; different types of micro-prUpdate Chassis manual; different types of micro-processors. ----------------------------------------------------------- In Chassis manual GR1-AX version 2: (GB) 4822 727 18084, (NL) 4822 727 18083, (D) 4822 727 18085 (F) 4822 727 18086, (E) 4822 727 1814-09-04
PhilipsGR1AXVertical vibration in cold condition of the setChange R 3052 into 1,8 kOhm (4822 116 52249) and change C2053 into 150 nF (4822 121 41854) 14-09-04
PhilipsGR1AXWEAK SOUNDCHECK DISC CERAMIC CAPS AROUND SOUND IF CHIP ESP C2033 ( 22nf )14-09-04
PhilipsGR1AXWhistling noise (from LOT).1) Glue the plastic lugs of the LOT L5530 with silicon or equivalent lute (non-reactive) at the copper track side of the PWB to damp off vibrations which causes the wistling. 2) Apply a non Hitachi LOT L5530; 4822 140 10369. REMARKS : The 14-09-04
PhilipsGR1AXWhite Lines on bright scenes when heatedC2523 6µ8 line driver supply decoupler14-09-04
PhilipsGR1AXWidth excess & EW faultyTr7533 2SA1359 on crt base s/c & driver Tr7530 BC848 had failed14-09-04

PhilipsGR1AXWill not start up from coldTurn 95V preset down if set starts fault is in overvolts circuit try D663814-09-04
PhilipsGR1AXWont stop in search tuneC2031 22nF faulty - may read ok14-09-04
PhilipsGR1AX 14GR1221Deadresistor 3300 4R7 o/c.cap 2301 4,7uF 350V s/c on multi voltage pcb14-09-04
PhilipsGR1AX 14GR1227/05BDead - HT at 1.5v at power supply whistlingReplace SF2D41 protection thyristor (6641)14-09-04
PhilipsGR1AX chassisArcing sounds on startup.Change Capacitor 2523 6,8uF14-09-04
PhilipsGR1AX chassisArcing sounds on startup.Change Capacitor 2523 6,8uF14-09-04
PhilipsGR2INT SHUTDOWNCNR50 POWER CONTROL IC14-09-04
PhilipsGR2Int shutdown & poor response to R/C & OSD corruptedCNR5014-09-04
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