i got the audio driver card off of the main pcb, I have to change the driver IC because of the broken leg on pin 10. I tried a sewing pin with a 90 degree bend on the tip to get behind the leg and work from the back after the solder was hot enough. I have an Extech DMM
1st pic is probe tips touching, 2nd is probes on pin 7 and 10, 3rd is the card off of the main pcb
1st pic is probe tips touching, 2nd is probes on pin 7 and 10, 3rd is the card off of the main pcb
I am NOT a fan of hot air work. If you must use it (rare), you may need to mask off adjacent components, sometimes with aluminum foil but Kapton tape generally protects well enough.
You have the range too low on the meter to read pins 9 and 10 if in the main board. Out of the main board, it may read a 1 (out of range) on any reading.
Read across R30 and 31 on the main board. What do they read? Meter set to the 2000 range.
You have the range too low on the meter to read pins 9 and 10 if in the main board. Out of the main board, it may read a 1 (out of range) on any reading.
Read across R30 and 31 on the main board. What do they read? Meter set to the 2000 range.
That's very odd. Desolder 1 terminal and measure across the pads and across the resistor terminals. Which one reads 0 ohms?
measuring both resistors read 222, but measuring R30 from pad to pad is 905 and R31 from pad to pad is 0 ohms. Sorry, had to clarify
Please post the meter reading (exactly as displayed) and provide a clear description of what you read across the resistor and across the pad.
I know you'll never have to lift a singe SMD pin but I was curious about a better way to do this. This made it easy. Insert it between pins and rotate it to lift the pin. It took 2 minutes to grind this with a Dremel and about the same time to lift the pin and clean up the connection. I'm sure that this could be refined but it should be a good starting point if anyone has to do this.
Attachments
R30 Resistor from end to end( one end desoldered): 2nd pic is of leads on R30 pads(1 pad has resistor leg still soldered, other end is desoldered) probes only touch pads. 3rd and 4th pics are of R31 resistor and pad tests done same as R30.
Post a good quality photo (in focus, no flare from the flash...) of the area around those resistor and the connections for the driver board.
Are you sure that you don't have any solder bridges?
Are you sure that you don't have any solder bridges?
There are multiiple R60s on the board near the drivers. Which ones have at least one terminal reading 0 ohms to ground?
yeah, but you see how they are crossed over on the bottom side with the Zener's next to them and the 1st leg of the PS drivers
