Diagnosis Of Disorder And Method Of Repair; Method Of Inspecting Main-Pcb - Samsung SRL3928B(A) Service Manual

9. Diagnosis of disorder and method of repair

Method of inspecting MAIN-PCB

At the self diagnosis CHECK, you have to turn the main power OFF and turn it ON and check.
ERROR CODE of self diagnosis is prepared as shown in the following table.
ERROR CODE of self diagnosis
NO Items
1
R-SENSOR
F-EVAP
2
SENSOR
3
F-SENSOR
DAMPER-MOTOR
4
(GEARED)
Resistance of sensor and voltage of MICOM
according to the temperature
temperature resistance voltage
-35 68150 4.360
-34 64710 4.331
-33 61480 4.301
-32 58430 4.269
-31 55550 4.237
-30 52840 4.204
-29 50230 4.170
-28 47770 4.134
-27 45450 4.098
-26 43260 4.061
-25 41190 4.023
-24 39240 3.985
-23 37390 3.945
-22 35650 3.905
-21 33990 3.863
-20 32430 3.822
-19 30920 3.778
-18 29500 3.734
-17 28140 3.689
-16 26870 3.644
Samsung Electronics
Segments display
Door s/w
R-sensor
Refrigerator compartment
Freezer compartment
temperature resistance voltage
-15 25650 3.597
-14 24510 3.551
-13 23420 3.504
-12 22390 3.456
-11 21410 3.408
-10 20408 3.360
-9 19580 3.310
-8 18730 3.260
-7 17920 3.209
-6 17160 3.159
-5 16430 3.108
-4 15740 3.057
-3 15080 3.006
-2 14450 2.955
-1 13860 2.904
0 13290 2.853
1 12740 2.801
2 12220 2.750
3 11720 2.698
4 11250 2.647
Contents of disorder
OPEN disorder
SHORT disorder
CONTROL RELAY of DAMPER-
MOTOR disorder or MOTOR,
REED S/W, MAGNET disorder
temperature resistance
5 10800
6 10370
7 9959
8 9569
9 9195
10 9839
11 8494
123 8166
13 7852
14 7552
15 7266
16 6992
17 6731
18 6481
19 6242
20 6013
21 5792
22 5581
23 5379
24 5185
if sensing below -50
if sensing above +50
cannot sensing
ON/OFF of REED
S/W for more than
1 minute operation
voltage temperature resistance
2.596 25 5000
2.545 26 4821
2.495 27 4650
2.445 28 4487
2.395 29 4329
2.346 30 4179
2.296 31 4033
2.248 32 3894
2.199 33 3760
2.151 34 3631
2.104 35 3508
2.057 36 3390
2.012 37 3276
1.966 38 3167
1.922 39 3026
1.873 40 2962
1.834 41 2864
1.791 42 2770
1.749 43 2680
1.707 44 2593
Note
voltage
1.667
1.626
1.587
1.549
1.511
1.474
1.437
1.401
1.366
1.332
1.298
1.266
1.234
1.203
1.172
1.143
1.113
1.085
1.057
1.030
24