Philips Repair Tips

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Make	Model	Symptom	Problem
PHILIPS	GR2.2	Dead with st/by led flashing	C2456 1µ 16v leaky - pin 16 tda2579
PHILIPS	GR2.2	Dead with st/by led flashing	140v present across c2631 with scan coil pl removed; no line drive from ic7470 tda2579b pin 11 - chip faulty
PHILIPS	GR2.2	Dead - went off with a crack	Loptr bu508af s/c - no reason for its demise could be found but when replaced, loptx arced destroying loptr again - loptx & loptr replaced
PHILIPS	GR2.2	Dead - protection cutting in	To disable, lift r3637 from tda8385 psu chip. this revealed e-w fault - prot 1531 o/c. when run on test loptx arced so had to be replaced also
PHILIPS	GR2.2	Crack noise.	Replace on mono sound module: a. position number 3052 by 470r (4822 051 10822) position number 3056 by 470r (4822 051 10471) in case of pal-bg/secam-dk or pal-bg/secam-li sets. b. position number 3052 by 560r (4822 051 10561) position number 3056 by 47
PHILIPS	GR2.2	Crack noise and interlace rattle.	Replace coil 5035 on the if-module by 4822 157 63077. realign s5035 to have a good picture and sound.
PHILIPS	GR2.2	Corrections to service manual	Corrections to service manual service manual position old code new code gr2.2 aa 1043(tps6.0mb) 4822 242 71841 4822 153 30025 (4822 727 19063) 1103(sft6.0ma) 4822 242 71841 4
PHILIPS	GR2.2	Corrections on product survey yearbook 1993:	Corrections on product survey yearbook 1993: styling 19: 3 4822 430 50921 cabinet 28" 4822 131 20483 picture tube a51eal55x73
PHILIPS	GR2.2	Correction to service manual	Correction to service manual the circuit diagram of the picture tube base panel shown on page 6.27 of the gr2.2aa service manual is incorrect diodes 6301, 6331 and 6361 are shown with cathodes connected to the emitters of 7304/7305, 7334/7335 and 7364/73
PHILIPS	GR2.2	Child lock enable/disable	Press "menu" button on remote control. when the menu appears on the screen select "special features". within "special features", the "child lock" can be enabled or disabled.
PHILIPS	GR2.2	Change of luminance on some pictures on mono sets.	Replace capacitor 2011 on the if sound module by 4822 124 80056 (47uf-16v). remark :week 9212 introduced in production.
PHILIPS	GR2.2	Certain effect on the left with rgb-signals.	Bend cable (m27 to m12) away from lot. remark : week 9212 introduced in production.
PHILIPS	GR2.2	But12af keeps blowing every so often	Check mains res cap 220µ 385v for loose rivets
PHILIPS	GR2.2	Black picture with unsynchronised teletext bars	Measure on pin 47 ic7800 (saa5246); if period time is smaller then 1 micro second, replace crystal 1800 (4822 242 81191).
PHILIPS	GR2.2	Black picture in teletext mode	Measure on pin 8 ic7800(saa5246): if the dc voltage of the videosignal is not 1,8 volt, then replace ic7800 (4822 209 31214).
PHILIPS	GR2.2	Bad vertical linearity for 110 degree crt.	A. for mini/narrow neck and black line sets:r3506 becomes 130k (4822 116 52242) b. for black matrix sets: r3506 becomes 150k (4822 116 52245) c2506 becomes 680uf (4822 124 80063) r3471 becomes 75k (4822 116 52301) c.all sets: c2509 becomes 1uf (482
PHILIPS	GR2.2	Bad synchronisation. sometimes black picture.	Pulses on pin 12 of ic7470 (tda2579) is too low (3vpp) because resistor r3539 is defective. 90° crt 430k (4822 053 20434 ) others 680k (4822 053 20684)
PHILIPS	GR2.2	Bad sound.	Delete 3237 in black matrix mono sets.
PHILIPS	GR2.2	Bad sensitivity on remote control signals	Replace pos.nr 1003 by 4822 130 83821 (improved infra-red receiver)
PHILIPS	GR2.2	Bad focus or picture shuts off with flyback lines in bl-s tube	Create artificial flash-over in the crt, by short circuiting vg2 and focus and connect them for a short moment to aquadag.