3. No Remote Control Reception
Check that you are using a [RC005NA] remote control and replace the batteries.
Is the [REMOTE CONTROL] switch on the back
panel set to [EXTERNAL]?
Can a square wave be found?
Point the remote control at the unit and check .
MCU[
U3001 : 26pin
] RC_IN
Check the cable and its connection.
MAIN PCB : [
CN3002
] to FRONT PCB : [
CP119
]
Check the cable and its connection.
POWER PCB : [
CP1004
] to FRONT PCB : [
CP120
]
Check the power supply voltage.
FRONT PCB [
CP120 : 7pin
] = +3.3V ± 0.5V,
+3.3V_CPU
Does the power supply voltage largely deviate
from 3.3V?
Can a square wave be found?
Point the remote control at the unit and check .
FRONT PCB
[
RMC100 : 1pin
]
Replace the FRONT PCB[
RMC100
].
Change the setting of the [REMOTE CONTROL]
switch.
[EXTERNAL] -> [INTERNAL]
MCU[
U3001 : 26pin
] is faulty.
Replace the [
U3001
].
Or replace the MAIN PCB.
Check that the connection is correct and
reconnect FFC.
If conduction does not recover, replace the cable
or circuit board.
Check that the connection is correct and
reconnect FFC.
If conduction does not recover, replace the cable
or circuit board.
Check each part listed after "
YES
".
Check the Square wave signal.
FRONT PCB[
Q518
] Collector。
No signal: Replace the [
Q518
].
There is a signal: Check the state / soldering for
the following parts.
MAIN PCB [
SW3000, Q3004, Q3006
]
Replace any faulty parts.
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
45