Sanyo HEC-DR7700 - Adjustment of Chair; Before sitting on the massage chair; Adjust the position of head cover.

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HEC-DR7700
Problem Diagnosis Chart
HEATER
PRESSURE
SENSOR
Error message
Troubled portion
Troubled phenomenon Check item Counteraction method
When there is pressure sensor
output of Continuation 3 second
and less then 0.1V.
When there is thermistor output
of continuation 2 second and
less then 0.1V.
When there is thermistor output
of continuation 2 second and
more then 4.9V.
1. The connection confirmation of Printed board (Power) CN204.
2. Check the Printed board (Power) CN204 output
(approx. DC100V).
1. The connection confirmation of Printed board (Main) CN18.
2. Check the seat reclining lower limit switch.
3. Others.
1. The connection confirmation of Printed board (Power) CN204.
2. Check the Printed board (Power) CN204 output
(approx. DC100V).
1. The connection confirmation of Printed board (Main) CN18.
2. Check the seat reclining upper limit switch.
3. Other
1.
The connection confirmation of Printed board (Main) CN12
.
2. Check the Connector ass'y A,B(heater) for disconnection.
3. Check the Thermistor for disconnection.
4. Others.
1.
The connection confirmation of Printed board (Main) CN12
.
2. Check the Connector ass'y A,B(heater) for shorting.
3. Check the Thermistor for shorting.
4. Others.
1. Check the volume rotary (pressure) .
(CN903 red-black approx. 10k /red-white approx.
250 - 10k )
2. The connection confirmation of Printed board (Main) CN11
and Printed board (Massage pulse) CN901 and CN903.
3. Check the main harness for disconnection or shorting.
4. Others.
Insert the connector.
If output Replace the reclining motor (seat).
If no output Replace the Printed board
(Power).
Insert the connector.
Replace the reclining motor (seat).
Replace the Printed board (Main).
Insert the connector.
If output Replace the reclining motor (seat).
If no output Replace the Printed board
(Power).
Insert the connector.
Replace the reclining motor (seat).
Replace the Printed board (Main).
Insert the connector.
Replace the
Connector ass'y A,B (heater)
.
Replace the
heater(sole)
.
Replace the Printed board (main).
Insert the connector.
Replace the
Connector ass'y A,B (heater)
.
Replace the
heater(sole)
.
Replace the Printed board (main).
Replace the volume rotary (pressure).
Insert the connector.
Replace the main harness.
Replace the Printed board (main).
RECLINING
SEAT
The seat reclining motion
doesn't move. (Don't down)
A foot rest lilacinning operation
stop is not carried out.
The foot rest reclining motion
doesn't move. (Don't up)
A foot rest lilacinning operation
stop is not carried out.
When there is no detection of reclining
switch(lower limit) at the seat part for
continuation 1 minutes while reclining
motor are moving for lower seat.
When there is no detection of reclining
switch(upper limit) at the seat part for
continuation 1 minutes while reclining
motor are moving for raising seat.