• ** REMEMBER! **The microwave can still shock you even unplugged!!

    ALWAYS discharge the high-voltage capacitor first if you even think your hands will come close to any HIGH VOLTAGE components.

    Jeff mentions this: Anything in the high voltage ( magnetron, capacitor, diode, wires to and from ):
    ...Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it.

    From Jeff's site: http://www.applianceaid.com/component-testing.php

    Jake

Panasonic NN-SD670S - Starts as soon as door closes

buefordTJ

Premium Member
Joined
Aug 28, 2016
Messages
9
Location
Montreal
Model Number
NN-SD670S
Brand
Panasonic
Age
6-10 years
Hi, 4 months ago the problem I had with this unit was it would turn on when the door opened. It was a faulty microswitch attached to the door mechanism ... easy fix.

This time around the unit turns on (fan, table rotation, and heats the food) as soon as the door closes. Pressing stop on the control panel has no affect on it.
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,713
Location
Ontario, Canada
Hi,

NN-SD670S
Won't come up for me online.

Door switch, door switch mechanism, welded closed relay on the smart board are common trouble makers.
Definetly check the easy stuff ( door switches, door switch mechanism ) first.

jeff.
 

buefordTJ

Premium Member
Joined
Aug 28, 2016
Messages
9
Location
Montreal
Hi Jeff,

I would say it's the same as the newer model NNSD755S. Power output is the same.

Door switches were tested and passed. For the relay on the smart board i see two - RY1 a 4-pin relay (all soldered on PCB) and RY2 a 5-pin relay (3 soldered on PCB) ... see attached photo. How do you test these types of relay?

IMG_5443.JPG
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
23,713
Location
Ontario, Canada
How do you test these types of relay?
Some you cannot. Some can be ohmed. Some I will tap with a screw driver to see if the contacts will break apart....most times we just eliminate all other stuff until the board is the only issue left.

jeff.
 
Top