My PIXMA MP970 printer abruptly lost power. is it due to fuse problem and where is the fuse box?
The printer has the step down SMPS which supply the low voltage (generally 24V DC to the other component. It contains high voltage risk also the high frequency. Sound knowledge is required while repairing the SMPS also appropriate precaution. If somebody is present having electrical knowledge during repair is better.
First disconnect the electricity supply cable from the printer
open the smps, check visually for any physical abnormality of individual component, then check the fuse for open,if its open check the MOV,mosfet,capacitor,bridge/zener diodes for short if found replace with same value,
take a series lamp of 15W incandescent bulb, connect the smps, check the voltage at secondary output. utmost care should be taken with attention of co-worker while checking live circuit.
If there is no voltage, check primary component at area of PWM IC /replace PWM ic (smd).
Again FATAL ELECTRICAL SHOCK AND FIRE MAY HAPPEN IF CARE NOT TAKEN.
Feb 13, 2015 |
Canon PIXMA MP970 InkJet Printer