Samsung RT38 Service Manual page 46

TROUBLESHOOTING
4-2-1. When Self-Diagnosis Error occurs
- The Display Panel shows the Sensor Error and, when the unit is plugged in and there are sensor errors,
the unit does not operate and Display bar related to the defective sensors keep blinking.
- When sensor defects occur during the operation, the unit keeps working. But, it shifts to the Emergency
Operation and it may not work properly. So, please check the unit according to the Self Diagnosis function.
1) When the R-Sensor is defective
ERROR CODE
DATA1. Temp Table
** Sensor Resistance Reading Location **
R : Between CN30 #5 and #7
** 0Ω : Short / ∞Ω : Open
Refer to Circuit Diagram
Sensor MICOM/Connector #
Between Connector CN30-
R
"5"(ORG) and CN30-"7"(GRY)
Voltage : Between 4.6V ~ 0.6V
Voltage at IC10 MICOM #
23 is the same as the value
between CN30-"5"(ORG)
and CN30-"7"(GRY)
Start
MAIN PCB Connector
CN30 is inserted properly?
Yes
R Sensor is
normal?
Yes
Voltage between
MAIN PCB Connector CN30-"5"(ORG)
and CN30-"7"(GRY)?
Yes
Input Voltage at IC10
MICOM Pin# 23 is normal?
Yes
PCB and Temp Sensor are normal.
Check the connector contact.
51
No
Connector contact defect /
Reconnect
No
Replace Temp Sensor
Value < 0.6V or Value > 4.6V
Check the wire connection
No
Check Soldering Defect & Short