Connect with us

phillips tv problem

Discussion in 'Electronic Repair' started by Alfred Lorona, Nov 25, 2005.

Scroll to continue with content
  1. 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
     
  2. crazy frog

    crazy frog Guest

    you need to check the eletro caps
    around the power supply.
    had the same prob with a nec tv.
     
  3. Guest

    Here are some tips for your set:

    Dead/Shutdown Problems:

    C2405 [email protected] Electrolytic Capacitor HZ circuit

    C2455 [email protected] 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
     
  4. Guest

    Here are some tips for your set:

    Dead/Shutdown Problems:

    C2405 [email protected] Electrolytic Capacitor HZ circuit

    C2455 [email protected] 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
     
  5. b

    b Guest

    Alfred Lorona ha escrito:
    resolder power supply area and check or replace that power relay.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-