5-2) How To Enter The Test Mode - Samsung RS757LHQESR/ Series Service Manual

DISASSEMBLY AND REASSEMBLY

5-2) How to Enter the Test Mode

1) When there is no Power (SMPS PCB)
CAUTION There are AC input voltage
running on CN1. So, be cautious when
repairing the unit or measuring values.
SMPS PCB CHECK Using Multimeter
☞ Where to Check Input Voltage AC
Voltage at CN1
☞ Where to Check DC 12V
At both CN5 ③→ CN2①
☞ Where to Check DC 5V
At both CN5 ④→ CN2①
Start
Is the Power Plug plugged in?
Yes
Is the Power applied
tothe both of the SMPS Power
CN1 terminals?
Yes
IS 12V applied to
the both of CN5 ③ - CN2①
terminals?
Yes
IS 5V applied to
the both of CN5 ④ - CN2①
terminals?
Yes
Normal(RE-check)
51
When checking the SMPS PCB, refer
to the Operation descriptions and the
"Reference"section.
No
Plug in the unit or Make sure the unit
is plugged in properly
No
Check the Wire Connection
No
Replace SMPS PCB
No
Replace SMPS PCB