5-2-3 When the remocon is not operated
5-4
Samsung Electronics
1) Check points
(1) Is the voltage of the power source normal ?
(2) Is the electric wire in good contact ? (CN71, RY71)
(3) Is the assembly main PCB in good contact with the assembly panel PCB?(CN91, CN92)
(4) Is the voltage of +12V and +5V of the assembly panel PCB normal?
(CN91 No 1 pin and No 4 pin : +12V, No 2 pin and No 4 pin : +5V)
(5) Is the battery vortage of the remocon above DC 2.7V?
Turn off the power, and then turn it on
again five seconds later.
Replace the assembly panel PCB.
Dose the Buzzer sound, when the power on?
Check whether the "COOL" LED lamp is on
and th operation starts when pressing the
on/off button of the remocon.
Is the battery voltage of the remocon above
DC 2.7V?
Is the collector voltage of the remocon Q1, Q2(C2412)
a square wave?
Does the X-TAL oscillate normally?
Is the input voltage of the micom(IC04) No. 51
pin of the assembly main PCB a aquare wave?
Go to the clause "No power".
The remocon is normally operated.
Replace the battery.
• Check the X-TAL for cold soldering and a
short.
• Replace relevant components.
• Check the micom(ICT1) Q1, and Q2 for
cold soldering and a short.
• Replace relevant components.
• Check the R414 components.
• Check the micom(IC04).
N
Y
N
Y
Y
Y
Y
N
N
N
N
Y
AW0690-00162A-2 5/16/00 11:35 AM Page 5-4
