Samsung DSB-S300G Service Manual page 29

Troubleshooting
No Recording
Check Voltage at
pin1=5V pin4=12V of "PZWZ2"(HDD
power connector)
on SMPS board
Check the cable at HDD
power cable and ATA
Data Cable
Check the HDD Selection
= Master
Check the Data Signal at
Œ U603,´ U604,
ˇ U605
Check Failure mode
of HDD
5-10
No
Yes
No
Yes
No
Yes
No
Yes
Check Failure mode
of SMPS Board
Fix the cable
Fix the HDD Selection
-> Master
Check Open or Short at
U601,U602,U603,U604,U605
and Their Circuit
ΠU603 Pin1 : ATA Select
´ U603 Pin11 : ATA Address
ˇ U604/U605 Pin2 : ATA
Data
Samsung Electronics