TV resistor not making any sense

Collapse
X
 
  • Time
  • Show
Clear All
new posts

Related Topics

Collapse

  • Darren Hibbert
    Replacing a Current Sense Resistor
    by Darren Hibbert
    Hi.

    Quick question.

    I have a laptop that is completely dead. I opened it up and it looks like the current sense resistor is blown. However, because it's blown, the value printed on the top has disintegrated and there is no schematic available for this particular laptop (Dynabook Portege) so I'm not sure what to replace it with.
    04-08-2024, 08:36 PM
  • jinu_j
    Dell 2209WA - power supply - Fusible Resistor replacement
    by jinu_j
    Hi

    I am trying to repair an ancient Dell 2209WA Monitor which suddenly shut off with a pop sound. On investigation found that one of the fusible resistors had blown. Further investigation identified multiple components as faulty because of which the fusible resistor blew. Please refer the attached circuit diagram showing the components that were found to be damaged.

    1. FR950 - blown fusible resistor - 0.2 Ohm 1W
    2. Q950 - shorted Q950 MOSFET - 650V 10A N Channel Mosfet
    3. R835 - Blown Resistor - 20KOhm SMD resistor
    4. D930 - Shorted Schottkey Diode...
    05-03-2025, 10:51 PM
  • mikey5791
    Need help to replace burned resistor in 350w atx psu
    by mikey5791
    Hi to all forum members,

    Got this faulty 350 watt atx psu dirt cheap from a local online seller as i am keen to use it as a learning tool to repair faulty power supply.
    The faulty part is quite obvious from the burn area near the 16pin KA7500 BD pwm. The fuse is still intact with good continuity.

    Upon power on ac, there is 5vdc standby power on cathode of diode D14 and about 10vdc on cathode of diode D13.(This should be the aux power to generate the 12v and 5v rail.)
    Initially i replace the two burned resistors near my marked red arrow to 200 ohm resistor...
    12-26-2024, 04:55 AM
  • ResoluteHawk
    ASUS GA401QM Missing 5v
    by ResoluteHawk
    Hello;

    I have an ASUS G14 GA401QM that currently has no 5v rail among other things stated below in points #3 and #4. I'd like to see if it's condition can be improved.

    1) Originally this laptop had a problem with a shorted main power rail, so measuring at the current sense resistor after the DC IN FETs yielded a very low resistance. Before proceeding further I measured the CPU coils. We get 8.2 Ohms on the farthest right coil (PL8105) and 3.3 Ohms on the four to left left of it (PL8101 through PL8104). When I injected 1v into the current sense resistor, PQH9402 got warm....
    03-14-2023, 12:23 PM
  • artvandalai
    What resistor ohm will work better to repair this waterpik?
    by artvandalai
    The resistor on this waterpik blew. I changed it with the a similar spec 47ohm 2 watt yageo resistor but it still keeps blowing the resistor. Checking with the multimeter the motor, capacitor, diodes, and thermal fuse all checked normal. Will a higher ohm resistor work better? What ohm resistor will work better to repair this waterpik? This video is showing the repair with a 56 ohm resistor https://www.youtube.com/watch?v=_J7_rV7ui1Y
    01-05-2025, 04:10 PM
  • Loading...
  • No more items.
Working...