Search: philips
Results: 14233
Make Model Symptom Problem Solution By
PHILIPS GR1AX
Sound low vol D6715 5v1 zener leaky (adj to micro ic7700) & disc ceramic caps around sound if chip - c2033 22nf
PHILIPS GR1AX
Smeary, washed out pic C2060 680µ in 12v supply
PHILIPS GR1AX
Slow start up fropm cold with no osd Tr7765 (bc548) s/c between b-e, c2523-68uf
PHILIPS GR1AX
Shuts once in a while and goes to stand-by. Check c2631 (22nf; 4822 122 30103) on leakage.
PHILIPS GR1AX
Set will not come out of standby Check/replace the eprom, ic7785 (st24c02cp; 4822 209 62098)
PHILIPS GR1AX
Set switches to stand-by Check/replace c2631 (22nf; 4822 122 40606)
PHILIPS GR1AX
Set is intermittently not coming on, especially from cold. High tension coming up to normal voltage but there is no line drive. check start up pulse to line osc ic - pin 11 of ic 7020. if ok, check to see if line drive appears for an instant at switch on, on pin 26. if so, check on base of line output transist
PHILIPS GR1AX
Set goes into stand-by Check/replace c2631 (22nf; 4822 122 40606)
PHILIPS GR1AX
Set goes accidentally into hotel mode. The hotel mode will be activated if the set is on program 38 and if "store" and "program +" are pressed simultaneously. however this can also happen when "program -" and "program +" are pressed instead. to block this possibility: interrupt the copper trac
PHILIPS GR1AX
Set fails to start-up from standby mode, or at cold temperature. Change c2058 from 33 uf to 47 uf 100v (4822 124 42085). remarks : the cure is applicable for sets produced in week 9041-9047.
PHILIPS GR1AX
Set dead due to action of over-voltage-protection circuit. If thyristor 6641 is disconnected, the set starts up. disconnect t7100 and see if the set comes on, if so suspect t7100 (4822 130 40947) or a fault on the 9 volt rail, probably an audio fault. if the audio output ic7103 is disconnected, the set starts
PHILIPS GR1AX
Servicing the philips gr1-ax chassis See tv mag may 1994
PHILIPS GR1AX
Service information correction. Service information correction. ------------------------------- in service information gr1-ax 91.02, 4822 727 18934 (gb), chapter 7 the replacement code for the u943/phono is not correct. this should be 4822 210 10452.
PHILIPS GR1AX
Search tune won't stop & sound slow to come on when chan changed Ident signal from micro perm low - tr7046 bc558 s/c
PHILIPS GR1AX
Search jumps on uhf. Check/replace r3788 (2m2; 4822 116 81682).
PHILIPS GR1AX
Replacing the earom Replacing the earom ------------------- the memory ic ic7785, x2402 has been replaced by st24c02cp (4822 310 31886). together with the st24c02cp change-over, the 5 volt supply has to be adapted: l5786 has to be connected between pin 8 of ic7785 and r379
PHILIPS GR1AX
Repeat failure of line output transistor item 7528 After fitting a new transistor type 2sc3795b pt. no.4822 130 60676 check soldered connections to socket m3
PHILIPS GR1AX
Repair-tip power-supply Repair-tip power-supply ----------------------- it is not allowed to connect a measuring probe to the gate of mos-fet transistors ts7610 because the set will not function well, or the mos-fet might be damaged.
PHILIPS GR1AX
Reluctant start from cold - no 95v ht Ok if set ht pot reduced - zener 6638 bzx79-b36 in ht sensing leaky
PHILIPS GR1AX
Programs and pp-settings cannot be changed It may happen that when switching on from standby the set comes on in "store lock" mode (sometimes called "hotel mode"). in this mode stored settings for programme selection and personal preference cannot be changed (see operating instructions for leavin