IFcon Section Flow Chart(1/2)
IF Con block power supply check
UNSW3.3V voltage (+3.3V)
Is 3.3V output from IC301 pin4?
No
Input voltage
Is +3.8V input to IC301 pin5?
No
No
Input voltage
Is +11.8V input to IC302 pin2?
Yes
Yes
Yes
Replace IC301
If symptoms do not improve, check for a
short on the circuit board
REG control voltage
Is +3.8V input to IC301 pin1?
No
Replace R304
If the symtoms, replace IC301
Yes
Replace IC301
P_FAIL detection operation check
Check the P_FAIL voltage
No
No
Is +3.3V output from
IC1204 pin2
?
Yes
Main unit key check
Check of key voltage from main unit Key
Table (*) when key is pressed or not pressed
No
No
POWER:
CN1203 pin1(JL1269)
KEY0
STOP:
CN1204 pin21(JL1233)
KEY1
OPEN/CLOSE:
CN1204 pin22(JL1232)
KEY2
PLAY:
CN1204 pin23(JL1231)
KEY3
Yes
Remote control operation check
Check the waveform when the remote
control button is not pressed
No
Check whether the FFC is disconnected
from
CN1204
. (Other than the POWER key)
No
Check of the 3.3V voltage
CN1204 pin19
and
IC1203 pin31
Yes
Check of the waveform when the key is
pressed
In comparison with a normal waveform, is
the waveform of the voltage output
tl ?
No
Is the remote control that is used in the
inspection broken?
No
Does replacement of the
IF
board result in
improvement?
No
Yes
Check whether the FFC is disconnected
from
CN1204
.
Yes
Replace
R1264
and check for +3.3V at
I
C1204 pin1
If symptoms do not improve, replace
IC1204
(P_FAIL detection)
* Key T able
Input
(KEY0)
(KEY1)
2.90 -
0.00 -
Key_OFF
POWER
Key_OFF
STOP
OPEN/CLOSE
(KEY2)
(KEY3)
Key_OFF
Key_OFF
PLAY
B
To
IF
board Flow
9-4
Is there voltage of about 3.3V at pin 21,22
and 23 of CN1204 and pin 1 of CN1206
without pressing the keys?
Is there a problem with the mounting
condition of RB1201,RB1202,C1213,C1214,
C1215 and C1216?
Yes
Replace RB1201,RB1202,C1213,C1214,
C1215 and C1216. If the symptoms do not
improve, replace IC1203 or MB board
Yes
DCDC4V voltage (+3.8V)
Is 3.8V output from IC302 pin 3?
Does replacement
of the
IF
board result in
improvement?
No
Yes
To
IF
board Flow
If the FFC from CN1204
disconnected?
(other than POWER KEY)?
Is the harness from CN1203
disconnected?
(POWER KEY)
No
Yes
Replace R302
If the symtoms do not improve, replace IC302
Is the fuse (PS301) blown?
Replace PS301
if the symptoms do not improve,check for
a short on the circuit
No
To
Power Supply (System)
o
EN control voltage
Is +11.8V input to IC302 pin2?
No
N
Yes
Replace IC302
A
BDP-S485
