A Phillips tv model 27PT543S37A will not turn on. The front panel green light comes on. Sometimes I can hear a clicking sound like a relay trying to latch. But the tv will not come on.
A few days ago, after a few clicks, the tv would come on and work OK.
Any help will be greatly appreciated.
AL
you need to check the eletro caps around the power supply. had the same prob with a nec tv.
to
Here are some tips for your set:
Dead/Shutdown Problems:
C2405 220uf@25V Electrolytic Capacitor HZ circuit
C2455 47uf@25V Electrolytic Capacitor HZ circuit
D6460? (Producing 125 vdc?) FS Diode 9340 559 50112 (Cathode off Q7460 Collector) Part # 2422 086 10869
Fuse 1500 (Line Fuse) 4 amp @ 250 volts
IC7521? (Regulator)
Q7460 Marked BU4508DX (HZ Output Transistor) Philips # 9340 550 92127 HZ circuit
Q7461 Marked BC 337-25 (L CBE R) Part # 3198 020 43530 HZ circuit
Q7463 Marked BC 327-25 (L CBE R) Part # 3198 020 43430 HZ circuit
R3340 (10 ohm 1/3w) on CRT board? Replace with a 1/2 watt. Taken out by CRT arc? Supplies about 200 volts to the collectors of the video driver transistors. If this voltage is low, it causes excessive brightness (Excessive beam current), causing the set to "shut-down". If the shut-down is too quick, you will NOT see the excess brightness, because the picture tube has not warmed-up enough to display anything on the picture tube. To see if the set displays "excess brightness", you will need to turn the set "on" about 5 to 10 times. This will heat the picture tube enough to display "excess brightness", if that is the problem.
R3532? (location: Before a SMPS Transformer primary winding)
Service Data (See Philips Force 32 Disc Volume 2003 Issue 5) (Philips Manual 7638)
Good Luck! Robert
Here are some tips for your set:
Dead/Shutdown Problems:
C2405 220uf@25V Electrolytic Capacitor HZ circuit
C2455 47uf@25V Electrolytic Capacitor HZ circuit
D6460? (Producing 125 vdc?) FS Diode 9340 559 50112 (Cathode off Q7460 Collector) Part # 2422 086 10869
Fuse 1500 (Line Fuse) 4 amp @ 250 volts
IC7521? (Regulator)
Q7460 Marked BU4508DX (HZ Output Transistor) Philips # 9340 550 92127 HZ circuit
Q7461 Marked BC 337-25 (L CBE R) Part # 3198 020 43530 HZ circuit
Q7463 Marked BC 327-25 (L CBE R) Part # 3198 020 43430 HZ circuit
R3340 (10 ohm 1/3w) on CRT board? Replace with a 1/2 watt. Taken out by CRT arc? Supplies about 200 volts to the collectors of the video driver transistors. If this voltage is low, it causes excessive brightness (Excessive beam current), causing the set to "shut-down". If the shut-down is too quick, you will NOT see the excess brightness, because the picture tube has not warmed-up enough to display anything on the picture tube. To see if the set displays "excess brightness", you will need to turn the set "on" about 5 to 10 times. This will heat the picture tube enough to display "excess brightness", if that is the problem.
R3532? (location: Before a SMPS Transformer primary winding)
Service Data (See Philips Force 32 Disc Volume 2003 Issue 5) (Philips Manual 7638)
Good Luck! Robert
Alfred Lorona ha escrito:
resolder power supply area and check or replace that power relay.
ElectronDepot website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.