Analysing a non-spinning hotpoint motor?
 

I've got a hotpoint washer / dryer that isn't rotating the
motor.

So heres an interesting puzzle for you :) -

Anyone know how the motors are wired, or just know motores
well, and if the following analysis makes sense?
The motor says on it AC motor for electronic speed control,
1 phase. (904/1153/10). This is UK 240v.

I took the motor out and replaced the brushes, but its still
dead (the rest of the machine functions).

There are 7 pins going into the motor, with a 7 block connector
going in.

The wires going in are labeled 1-7 going left to right,
and all are white except pin 1 = sort of purple / lilac,
and pin 5 - red blue stripes.

I've stuck a multimeter on the motor, and can see
that pin 2 goes into one brush, pin 3 into the other.
When connected, there is about 7 ohms across the armature,
i.e. across pins 2-3.

Pins 1, 4- and 5 seem connected (~1 ohms) ..
Across pins 6-7 is 1.6k ohms.

The above measurement were all with the power off.

I put the mulitmeter into AC volt mode, stuck one pin on
earth (chassis), and sticking the machine into slow 'tumble' mode
checked the voltages which follow.

I'll put this into a little table to see if that helps:
THe table was done in notepad in courier new if the formatting
is a mess in your reader.

1 2 3 4 5 6 7
Purple White White White Red/Blue White White
-6,7 Armature Armature -1,5 -1,4 -7(1k6) -6 (1k6)
0V ~235V 0V 0 ~230V ~160V ~160V

Any ideas? Is the motor goosed? Control unit? Or does none
of this make sense to anyone?!

Thanks in advance.
Brian.

i cant be of much help, but there is usually a schematic glued
somewhere on the machine that will tell alot. i know there is a timer
and maybe some temp switches the current goes thru before it gets to the
motor, a detailed voltage test along that path may tell whats bad and if
motor is even getting current. lucas

Brian wrote:

I've got a hotpoint washer / dryer that isn't rotating the
motor.

So heres an interesting puzzle for you :) -

Anyone know how the motors are wired, or just know motores
well, and if the following analysis makes sense?
The motor says on it AC motor for electronic speed control,
1 phase. (904/1153/10). This is UK 240v.

I took the motor out and replaced the brushes, but its still
dead (the rest of the machine functions).

There are 7 pins going into the motor, with a 7 block connector
going in.

The wires going in are labeled 1-7 going left to right,
and all are white except pin 1 = sort of purple / lilac,
and pin 5 - red blue stripes.

I've stuck a multimeter on the motor, and can see
that pin 2 goes into one brush, pin 3 into the other.
When connected, there is about 7 ohms across the armature,
i.e. across pins 2-3.

Pins 1, 4- and 5 seem connected (~1 ohms) ..
Across pins 6-7 is 1.6k ohms.

The above measurement were all with the power off.

I put the mulitmeter into AC volt mode, stuck one pin on
earth (chassis), and sticking the machine into slow 'tumble' mode
checked the voltages which follow.

I'll put this into a little table to see if that helps:
THe table was done in notepad in courier new if the formatting
is a mess in your reader.

1 2 3 4 5 6 7
Purple White White White Red/Blue White White
-6,7 Armature Armature -1,5 -1,4 -7(1k6) -6 (1k6)
0V ~235V 0V 0 ~230V ~160V ~160V

Any ideas? Is the motor goosed? Control unit? Or does none
of this make sense to anyone?!

Thanks in advance.
Brian.
Hi,
Key word here is electronic speed control. Probably some circuit with
triac. Don't bugger around with motor. Find the electronic control unit.
No block diagram or schematics for the unit? Follow the cable harness
backward.
Good luck,
Tony