Electrolux SM 554 Manual de servicio descargar pdf (Pagina 47)

Service

Manual

9406

Description

The programmer is electronic and is made up of two circuit

boards, the control board with microprocessors and

program memory, and the relay board with relays and

interference suppression circuits. The programmer has the

following outputs and inputs:

• Outputs which, via relays, control the various functions

of the machine such as water fill, drain, spin etc.

• Outputs which control the information that is to appear

on the display.

• Inputs that detect keystrokes from the keyboard.

• Inputs that give information about the status of the

washing machine from, for example, thermostat

sensors, level detectors, out-of-balance detectors, door

lock and speed switch.

The programmer is controlled by the instructions stored in

the program memory. The memory is in the form of two

memory chips (see diagram below):

• The lower chip, which contains memory information that

cannot be changed, contains instructions about

operation, service program, relay control, sensing of

inputs etc. It also contains the standard programs

supplied with the machine on delivery.

• The upper memory chip stores programs created by the

customer. The content of this memory can easily be

changed by erasing unwanted programs and creating

new ones.

23. Programmer

P1 Display

contrast adjust-

ment (normal

adjustment:

fully clockwise

minus 1-2 mm)

Program chip

for standard

programs

Program chip

for user

programs

Level check

P4 Not to be used

factory setting only

X1 Connector for control panel

Service switch

Display

Connection for

key switch

X6X5

S2 S3

12V

Control

Transformator Fuses

1103

P3 level check adjustment,

mid-position

P2 level check adjustment, zero position

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 90 91

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Electrolux SM 554 Manual de servicio Pagina 47

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