Check And Remedy In The Event Of Malfunction - Sharp AX-GX2T(R) Service Manual

[8] Check and remedy in the event of malfunction

1. List
I Before starting the P.W.B. unit replacement, make sure to refer to "Before replacing the Printed Wiring Board" in page 2-2.
Operation Trouble
No display
No key is valid.
No backlight for display
illuminates
Even
The rotary knob does not
with plug-
function.
ged in
The oven lamp does not il-
luminate.
(Note that the lamp
goes out after three (3) minutes
from opening the door.)
(Note that the lamp is off during
fermention mode.)
No sound
The "
does not function.
The fan motor does not run.
The engine heater does not
When
function.
heating
The convention does not
operation
function.
started
The tube pump motor does
not run.
Reset occurs.
Even with the water tank filled
with water, "
Others
indicated and heating does not
start.
Note 1. If the display unit is replaced, carry out "
Note 2. If the engine unit is replaced, carry out "Treatment after engine unit replacement". (See page 7-5.)
Has the oven been not operated for 1~30 minutes or more?
YES: Open and close the door.
NO: Has the fuse 20A blown?
Replace the display unit.
Replace the display unit.
Replace the display unit.
Is there a voltage of about 110V between the oven lamp terminals.
YES: Replace the oven lamp.
NO: Replace the control unit.
Has the harness between the control unit (CN-D) and the display unit (WH-A) been connected?
YES: Replace the control unit or display unit.
NO: Connect the harness.
" key
The door switch is in the door open position (Even with the door closed, the oven lamp does not go out.).
YES: Adjust the door switch.
NO: Replace the control unit or display unit.
Is there a voltage of 110V for the AC fan or 24 V for the DC fan?
YES: Replace the fan motor.
NO: Replace the control unit.
Is there a voltage of about 110V between the terminals of each of the engine heater and convection heater?
YES:
NO: The latch switch is in the door open position.
Is there a voltage of about 110V between the tube pump motor terminals.
YES: Replace the pump unit assembly.(Check the tube pump motor.)
NO: Replace the control unit.
Replace the control unit.
Has the water tank been inserted all the way?
" is
YES: Do not use distiled water (ion charged water/ pure water) or Ro water.
YES: Replace the WL joint or the control unit.
NO: Insert the water tank or replace the tank or the tank spring.
Action
YES: Refer to "Check in the event of 20A fuse blowing".
NO: Check the display unit, fan motor thermal cut-out,
Replace the engine unit assembly (when the engine heater does not function.
Replace the convection heater (when the convection heater does not function).
YES: Adjust the latch.
NO: Replace the control unit.
Use water suitable for drinking (filtered).
(citrate washing)". (See page 4-7.)
6 – 9
convection thermal cut-out and engine thermal cut-out.