One Connect; Ocb Power On Sequence Test - Samsung QN55Q75CNF Service Manual

4-6. One Connect

4-6-1. OCB POWER ON SEQUENCE TEST

1. Connect OCB to TV & Place in Power Standby
A13V for 12.8Vdc on pins 7,8,9,10
9
2. Press TV "Power On" by Remote Control or TV Function Assy
PS_ON pin 3 .2Vdc (when off) changes to 3.3Vdc (on)
9
NOTE
Will stay On for short time when powered off.
3. If PS_ON Error (won't change or missing voltages)
OCB Cable Connection to the TV.
9
• Should hear OCB relay activate with cable connection.
4. If PS_ON is OK
B350 for approx 346Vdc at pins 15 & 16 is activated.
9
while using important B-GND reference at pins 19 & 20
• If missing perform "OCB Self Power Supply Test"
4. Troubleshooting
CNM803
Main Connector (POWER)
4-17