Daewoo Frs 2021 Service Manual

							 
 
CONTENTS
  REMARKS
  1. 
Conditions to turn on  LCD Light 
   1)  Power input (plugin)  
2)  When any button on the panel is pushed, first the back light turns on, t\
hen 
button control is done.  
   3)  When F/R  door is open , the light turns on.  
 
 2.  Conditions to turn off the light  
    1)  The back light turns off 10 seconds after F/R door is closed   
2)  1 minute after button control     
Explanation After Delivery INPUT
  Control Object
  “
FRZ SET. ” button  
“ REF SET. ” button  
P ower Cord   Electrical 
components  and LCD  CONTENTS
  REMARKS
   
1. 
Start  
    Push  “REF SET. ” button for 3 seconds within 10 seconds just after power 
input.  
 
2.  Control   
 1)  Electric al components  are OFF for 3 hours.  
 2) D isplay operates in normal way.    
 
Prevention of Compressor Restart  INPUT
  Control Object
  None
  Comp.   CONTENTS
  REMARKS
  C
omp. does not start again for 6 minutes though F -sensor is ON.   6min. delay    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
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							Dela y  F unctio n o f E le c tr ic  C om ponen ts 
IN PU T C on tr o l O bje ct 
C O M P O N/O FF C O M P 
F-FA N 
C O NTE N TS R EM ARKS 
 
1) F-fa n d ela y b y c o m p. O N/O FF 
-> F-fa n  is O N/O FF 1 m in ute  a fte r c o m p. is  O N/O FF. 
 
 
 
2) F an D ela y a nd P rio rit y  
R  F A N
O N  c o ndit io n
0.5 se c.
O N
ON
ON1.0 se c.
1.5 se c.
F  F A N
C F A N
O FF
O FF
O FF
 
 
3) F /R-fa n d ela y b y d oor o pen/c lo se  fo r e asy d oor  
 - > In sp ectio n : c h ecku p d o or o p ening  2  h ours  a fte r in it ia l  s ta rt 
   - > F ir s t  R  is  O N, 1  s e co n d la te r F  is  O N to  p ro te ct D C fa n  a gain st o ve r c u rre nt a t 
in it ia l  s ta rt.  
 
D O OR
R F A N
O PEN
C LO SE
20.5  s e c.  ( 0 .5 se c.
fo r fir s t  2  h rs .)
2 1se c.  ( 1 se c.  fo r fir s t  2  h rs .)
O N
O FF
O N
O FF
F F A N
  
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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1Min1Min
 
						

							 
Home Bar (Refreshment Center) Heater (FR-S580CR MODEL) INPUT
  Control Object
  None
  COMP  CONTENTS
  REMARKS
  It is linked with comp.
   
 
Control of Interior Lights INPUT
  Control Object
  R
efrigerator Door  
Freezer Door  
Home -Bar Door   
( Refreshment Center ;  FR-S580CR)   COMP
  CONTENTS
  REMARKS
  1)
 Control of  Refrigerator Compartment Lights  
R  lights tu rn ON/OFF by R -door switch (ON/OFF).  
   * 10 minutes after sensing door open, the lights turn off automatically thou\
gh 
 door close is not sensed. 
 
 
2 )   Control of  Freezer Compartment Lights  
  F  lights turn ON/OFF by F -door switch (ON/OFF).  
 
 
 * 10 minutes after sensing door open, the lights turn off automatically though 

door close is not sensed. 
 
 
3 )   R -lights ON/OFF by  Home -B ar  door opening  
    R-lights turn ON for 1 minute after sensing  HOME-BAR  switch open.  
   (If the switch is pushed again within 1 minute,  the light turns on another 1 
minute.)  
   
 
Demonstration Function INPUT
  Control Object
  “
LOCK ” button  
“ REF SET. ” button  
“ SLEEP ” button   COMP
 
F -FAN  
R -FAN   CONTENTS
  REMARKS
   
1. 
Start   
    1) Set  “LOCK ON ” first.  
2) Push  “SLEEP ” button 5 times while pushing  “REF SET. ” button simultaneously.  
 
2. 
Control  
 1)   All other electrical components are OFF except for  F-fan /  R-fan.   
2)   F an Control  
 
 DOOR OPEN
 -> FAN ON / DOOR CLOSE -> FAN OFF 

 3) 
D
 isplay
 
 :
 
 Normal mode
 
 (3.8
sec.
) -> SPEED(3sec.) -> Silent mode(3sec.) ->
 Sleep m
ode (3sec. ) 
3.  Stop or Termination  
 1)  During Demo mode push  “SLEEP ” button 5 times while pushing  “REF SET. ” 
button simultaneously.  
 2)  Power in again.  
       
 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
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Regulation of R-sensor OFF Point INPUT
  Control Object
  J18, 22 on 
Main  PCB   Resistance of R-sensor Mid  OFF Point  CONTENTS
  REMARKS
   
 a. Regulation of R-sensor OFF point (1.5degree DOWN) 
 b. In case refrigeration of refrigerator is weak or insufficient, take the \
following action. 
R-SENSOR
 OP1-2
R26
R70
R71  OP1-1  
a. R26 : R-SENSOR standard resistance in normal mode (31.4K ) 

 
 b. R70 : In case of weak ref., cut J18 to down the standard resistance by 1.5deg(2K) 
 
 c. R71 : In case of weak ref., cut J22 to down the standard resistance by 1.5deg(2K) 
 
 
  R26 = Mid OFF  point  
  R26 + R70 =  Mid OFF  point  - 1.5 deg  
  R26 + R70 + R71 =  Mid OFF  point  - 3.0 deg    
 
Summary of Function  CONTENTS
  REMARKS
    
 
* How to start function modes 
* All the modes are started with “LOCK ON”  except for “explanation after delivery & installation”.    A/S 
forced defrosting  “FRZ SET. ” +   “REF S ET.” 5 times       D
emonstration   “REF SET. ” +   “SLEEP ” 5  times      Explanation after delivery & 
installation
  “
REF SET. ” for 3 sec.  Right after first power in      ERROR 
display  “REF SET. ” +  “LOCK ” 3  times      
 
 
   
 
 
 
 
 
 
 
 
 
 
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 MICOM Circuit 
  Power 
  Circuit 
 
 
 
DC Output Power (Voltage)    Point
  Oscilloscope 
 Measurement   Remarks
   
   
*  DC  output  
 
15.7V  
11.96V  
   
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
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 SMPS Movement Wave 
    Drain to Source Break
 Voltage 
 Point
  Oscilloscope  Measurement   Remarks  SMP
SIC 
PIN
 
1,2     
  *Voltage between 
DRAIN
 and 
SOURCE  :  
below  650V   
   OVP(Overvoltage Protection) Wave at power input 

Point
 
Oscilloscope  Measurement   Remark
  SMPS  
IC PIN  
3,4
    *Minimum 
standard 
voltage at  OVP 
start :   
23.2V    
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
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     Initial Power Wave of Switching Power IC 

Point
 
Oscilloscope Measurement   Remark
  SMPS  
IC PIN  
3,4
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
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Sen so rs 
C ir c u it D ia g ra m 
 
 
  F unctio n o f  E ach  S en so r 
[  F-se nso r ] 
1 ) I t s e nse s t h e t e m pe ratu re  o f f r e eze r c o m partm ent a n d c o n tr o ls  Co m p., F-fa n O N /  O FF. 
2) H ow  it   w ork s ; 
W ork in g P oin t Low  O N M id  O FF H ig h  O FF 
W ork in g Tem p. -11.0  C  -20.0  C  - 26.0  C  
R esis ta nce  14.74  k   22.33 k    30.92  k  
S ensin g V olt a g e  3.50 V  3.00 V  2.14 V 
 
[ D-se nso r ] 
  ->  It s e n se s r e tu rn  p oin t  o f  d efr o stin g  h ea te r. 
W ork in g P oin t R etu rn  p o in t  o f  d efr o stin g h ea te r 
W ork in g Tem p. 10 C   
Resis ta nce  19.53 k   
S ensin g V olt a g e  3.1 V
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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=..=..=..
=..
 
						

							 
 
[ R-s e nso r ] 
1 ) I t s e nse s t h e t e m pera tu re  o f r e fr ig era to r c o m partm en t a nd  c o n tr o ls  R-fa n O N /  O FF. 
2 ) H ow  it   w ork s ; 
W ork in g P oin t Low  O N M id  O FF H ig h  O FF 
W ork in g Tem p. 2.65  C  0.3  C  -1.7 C   
Resis ta nce  26.88  29.34 32.00 
S ensin g V olt a g e  2.90V  2.81V  2.74V 
* In  c a se  r e fr ig e ra tio n o f  r e fr ig era to r c o m pa rtm en t  is  p oo r o r insu ffic ie nt  th ou gh  c o m p.  a nd  R-fa n o pera te  in  
n orm al  w ay ;  
1 ) C ut J 1 8 o n  M-P C B,  th en te m p.  is  lo w ere d -2 C t h an [M id  O FF p oin t]. 
2 ) I n  a ddit io n  t o  1 ) a ctio n , c u t J 2 2 o n M-P C B,  th en th e te m p.  is  lo w ere d –1  C  m ore . 
 
Rela y F unctio n  
C ir c u it  D ia g ra m 
 
 
H ow it  w ork s ; 
O N C ondit io n O FF  C on dit io n C ontr o l C ontr o l  M eth o d M IC O M  Po rt IC 3 O utp ut P in M IC O M  Po rt IC 03 O utp ut P in 
C O M P RELAY # 163.7 V #  140.7 V #  160V #  1412V 
F-LA M P RELAY # 153.7 V #  130.7 V #  150V #  1312V 
H B-HTR R ELAY # 143.7V #  120.7 V #  140V #  1212V 
H TR R ELAY # 133.7 V #  110 .7 V #  130V #  111 2V 
R-LA M P RELAY or S SR # 123.7 V #  100.7 V #  120V #  1012V 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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=..=..=..
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=..
=..
=..
=..
=..
=..
=..
=..
=..
=..
=..
=..
=..
=..
=..
=..
=..
=..
 
						

							Fan  F un ctio n  
  H ow  It   W ork s  ; 
O N C ond it io n O FF  C on dit io n 
M ICO M  Po rt M IC O M  Po rt C ontr o l 
O bje ct 
C ontr o l 
M eth od 3 1 32 33 IC  Co lle cto r 3 1 32 33 IC  Co lle cto r 
Low  (1 0V ) 
opera tio n 5V 0V 0V 1 0.3 5V 0V 
M id  (1 2V ) 
opera tio n 0V 5V 0V 1 2.1 9V 0V F-F A N 
H ig h (1 4 V ) 
opera tio n 0V 0V 0V 1 4.3 8V 
5V 5V 5V 
0V 
 
O N C ondit ion O FF C ondit io n 
M IC O M  P O RT M IC O M  Po rt C ontr o l 
O bje ct 
C ontr o l 
M eth od 3 9 40 41 IC  Co lle cto r 3 9 40 41 IC  Co lle cto r 
Low   (1 0V ) 
opera tio n 0V 5V 5V 1 0.3 8V 0V 
M id  (1 2V ) 
opera tio n 5V 0V 5V 1 2.2 4V 0V R-F A N 
H ig h (1 4 V ) 
opera tio n 5V 5V 5V 1 4.4 2V 
0V 0V 0V 
0V 
 
O N C ond it io n O FF C ondit io n 
M IC O M  Po rt M IC O M  Po rt C ontr o l 
O bje ct 
C ontro l 
M eth od 3 7 38 IC  Co lle cto r 3 7 38 IC  Co lle cto r 
H ig h (1 4 V ) 
opera tio n 0V 0V 1 4.5 4V 0V 
C-F A N Low  (1 0V ) 
opera tio n 5V 0V 1 0.4 5V 
5V 5V 
0V 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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