47
48
TROUBLESHOOTING
4. TROUBLE-SHOOTING
4-2-4. When Power is not applied
☞
SMPS Input voltage Checking
CN70 Input; CN70-"1"(black)
↔
"5"(Red)
AC voltage
Caution
There is AC220v or DC300v at the MAIN
PCb Power Circuit. So, be cautious when
repairing the unit or measuring values.
The unit is plugged in?
Start
Plug in the unit
NO
YES
220v is applied
at SMPS PCb CN70
terminals?
Check the wire connections
NO
YES
SMPS PCb fuse is blown?
Change PCb
NO
DC300v is applied at
bD1+/- terminals?
Replace PCb ASS'y
NO
YES
Normal
(Check again)
1) Replace fuse (AC 250v 2.0A)
2) Replace PCb ASS'y
YES
DC 6.2v is applied at
TOP S/W 245P C-S?
YES
Replace PCb ASS'y
NO
12v is applied at
C110 terminals?
Replace PCb ASS'y
YES
5v is applied at
C112 terminals?
Replace PCb ASS'y
NO
YES
Panel PCb operates normally?
YES
Loads such as Relay
operate normally?
1) Check Lead Wire connections
2) Replace Relay or PCb ASS'y
NO
YES
1) Check the wire connections
2) Replace Panel PCb
NO
Is there PCb Short
or breakage?
NO
1) Do Re-soldering
2) Replace PCb MAIN
YES
NO
- When checking the MAIN PCb, refer
to the Operation descriptions and the
"Reference" section.
☞
SMPS Secondary volt Ch12v) :
C111 & C110 : Same at both terminals
DC 12v ± 0.6v
☞
SMPS Secondary volt Ch5v)
C113 & C112 : Same at both terminals
DC 5v ± 0.3v
CN76-1(Gray)
works the same as
REG1 (GND).
- Check the connection of Door
Panel PCb
TWIN 냉동고 SM.indd 48
2009.4.9 2:56:18 PM
Содержание RZ60EESW1
Страница 15: ...15 2 5 DIMENTION 2 Product Specifications TWIN 냉동고 SM indd 15 2009 4 9 2 55 41 PM ...
Страница 66: ...66 8 SCHEMATIC DIAGRAM 8 1 BLOCK DIAGRAM TWIN 냉동고 SM indd 66 2009 4 9 2 57 6 PM ...
Страница 67: ...67 8 SCHEMATIC DIAGRAM 8 2 CIRCUIT DIAGRAM TWIN 냉동고 SM indd 67 2009 4 9 2 57 53 PM ...