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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
PhilipsG110Set blocked; no control of functions.Check solder joints of resonator 1760. 14-09-04
PhilipsG110Set blocksNo functions possible anymore Replace IC 7720 (TMP47C634N-2475; 4822 310 31844) Important: also mount metal shielding with earth to R 373814-09-04

PhilipsG110Set will scan but not stop if chanel foundCheck pin 13 TDA2579 for 0V rising to 9V when signal present C2451 ( 0.01uF ) & IC14-09-04
PhilipsG110Slow start up & won't sw to st/by with no sound & pulsing pic (usually after psu rebuild)R3617 220R sm o/c in psu pri14-09-04
PhilipsG110Sometimes the SOPS will not start up.Replace 3617 which is fitted across 6617 (220 ohm; 4822 111 90178) 14-09-04
PhilipsG110Sound abswent with "F2" in display Black wire that supplies 9v to NICAM board (to D6661 cath component side) was detached14-09-04
PhilipsG110Sound distortion on lh chan - ok on fm soundTDA1543 DA converter chip in Nicam cct faulty14-09-04
PhilipsG110Sound mutes spontanuouslyMount two capacitors of 100 nF (5322 121 42578; in parallel) between pin 10 IC 7220 (stereo decoder) and earth.14-09-04
PhilipsG110Standby Thyristor goes short circuit when switching to standby.Checks in the Power Supply showed that TR7651 was open circuit Base/Emitter. Service Code 4822 130 42513.14-09-04
PhilipsG110Start up and run perfectly all day. But if it was20V zener diode D6657.14-09-04
PhilipsG110StriationsUnder certain picture conditions, vertical striations may be seen at the left side of the picture on some receivers only. Sets mostly affected are those fitted with a .4 version of the CRT base panel. The symptoms can be greatly reduced or cured complet14-09-04
PhilipsG110sync fault - loses line lockTr7364 BC858 o/c due to s/c o/p print to screening can on txt pcb14-09-04
PhilipsG110Text does't functionReplace U 1003 (4822 212 23371) non TOP Replace U 1003 (4822 212 23519) TOP14-09-04
PhilipsG110Ticking soundOn some receivers it may be possible to hear a ticking noise in the background when the receiver is in external AV mode. In cases of specific complaint, the phenomena can be reduced by modifying the NICAM panel as follows: 1. Remove chip resistors R304414-09-04
PhilipsG110To disable control cct if set tripss/c pins 1 & 2 of opto coupler & run set on reduced mains (about 90v ac) to check psu; cause of tripping was D6657 LI-C20 diode in sound prot line leaky14-09-04
PhilipsG110Transistor 7625 (BUT18AF) lasts longerAdd two diodes BYD73B (4822 130 60778) between base and emitter of 7625 (anodes towards base). Check the 7654 is BC817 and not BC847.14-09-04
PhilipsG110Tuning unstableVoltage on pin 11 U 1000 (Tuner) fixed Replace U 1000 (UV 816; 4822 210 10365)14-09-04
PhilipsG110Txt unlocked - appears over pic intdry joints txt pcb - sm cap in this instance14-09-04
PhilipsG110txt waves about at topC2829 47µ on txt pcb14-09-04
PhilipsG110Vertical bars on channel 2 and 4.For sets equiped with a .4 picture tube panel, on channel 2 and 4 there are vertical bars (spook) visible at the left side of the picture. To solve this problem remove on the picture tube panel capacitors 2417, 2418, 2419 and replace jumper 9302 by a cap14-09-04
PhilipsG110Vertical shift incorrect, after replacing a 28" BL-CRT.Mount in parallel of R3512 a resistor of 2K2 (4822 116 52256) or 2K7 (4822 116 52263).14-09-04
PhilipsG110Very low contrast.Check DC voltage on pin 7 of IC7350. If this voltage does not rise above 1.7 volts suspect a fault in the BCL line. Check/replace T7351 - BC848B (5322 130 41982). Check/replace T7413 on the picture tube PCB (BC856B; 4822 130 60373).14-09-04

PhilipsG110When Chopper or LOP Trs goes s/cCheck C2546 8n2 2kv14-09-04
PhilipsG110White area visible on right side of screen in EXT1 mode of BL sets.Remove the resistors 3462 and 3464. Add a potentiometer of 47K (4822 100 11371) on the position of R3461.14-09-04
PhilipsG110Width at max or int (after LOPTx replacement)R3525 10k width pot o/c14-09-04
PhilipsG110Width excessive & varies with brightnessC2526 6n8 sm cap in EW mod cct leaky14-09-04
PhilipsG110Will not start; +148V = +/- 20 voltsFault suspected in Line output stage. Disconnect pin 3 of LOT transformer. If +148V comes to normal and line drive is achieved; reconnect pin 3 of LOT and try disconnecting R3281 (location D4 of PCB). If set starts up, suspect T7284 audio protection tra14-09-04
PhilipsG110Wont power up unless pin 3 LOPTx dis'dThis is the 14v supply which feeds 12v reg. Q7284 BC858 sm in audio prot stage was leaky14-09-04
PhilipsG110Won't start up - P.S squeals. Voltages lower than normal.Sound IC defective. After replacement, PS protection active- Change also 7281&7282(BC848) near sound IC14-09-04
PhilipsG110Won't start up - P.S squeals. Voltages lower than normal.Sound IC defective. After replacement, PS protection active- Change also 7281&7282(BC848) near sound IC14-09-04
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