18
PD-D6MK2-K
1
2
3
4
A
B
C
D
E
F
1
2
3
4
5. DIAGNOSIS
5.1 TROUBLESHOOTING
Start
(Power
→
O
N
)
Does
the LCD light?
Cancel the pure audio
or dimmer function.
Refer to Addendum
N
o. 1.
Check the connections at
D1
8
01, D1
8
02, and C
N
1
8
01.
• Check that the voltage at
V
2201
1
is
4.4
V
and that that at
V
2201
2
is
5
V
.
• Are any data transmitted on the
LCD communication line (LCCDT,
LCDCK, LCDCS, LCDRS) when
the voltage is switched between 0
and
5
V
?
• Are H and L switched when BLOFF
or DIMMER functions?
• Check the FU1.
• Check the connection between the PRIMARY
and AJKB (4 pin) Assys.
• Check the connection between the AJKB and
LCD Assys (17-pin FFC).
• Check that the voltage at J11
3
is 5.6
V
.
• Check the connections at D1
8
51 and C
N
1
8
01.
• Check the connection between the AJKB
and
CO
NN
ECTOR Assys (15-pin FFC).
• Check the connection between the
CO
NN
ECTOR and D
V
DM Assys (29-pin FFC).
• Is D1
8
09 short-circuited?
• Are the pins bridged at
IC1301 or IC1401?
Check
that the voltage
at C1
8
05(+) is
+12
V
.
Yes
Yes
N
o
[
V
+5A]
N
o
N
o
Does
the pure audio
or dimmer function
operate?
Are the
indications on
the LCD correct?
Yes
N
o
Does the tray
open?
Refer to Addendum
N
o. 2.
Yes
N
o
Does
the focus function
operate?
Refer to Addendum
N
o. 3.
N
o
Does
the spindle
rotate?
N
o. 4.
Yes
N
o
• Check the connection between the AJKB and CO
NN
ECTOR Assys (15-pin FFC).
• Check the connection between the CO
NN
ECTOR and D
V
DM Assys (29-pin FFC).
• Check the voltages at
V
+12A,
V
+5A,
V
+9D, and
V
+6R5
V
.
Yes
Yes
Yes
N
o
N
o
Replace D1
8
05 and Q1
8
01,
in that order.
Replace D1
8
07 and Q1
8
03,
in that order.
Yes
Check if the pins are short-circuited
at IC1101, IC1201, or IC1102.
N
o
Check
that the voltage
at
V
+3D is
+3.3
V
.
Are the pins bridged at IC1301
or IC1401 or IC1501?
N
o
Is IC1
8
51
damaged?
Yes
Replace IC1
8
51.
N
o
The LCD
display goes dark,
and the pure audio
LED starts flashing.
[
V
+12
V
system]
Check that the voltage
at C1
8
03(+) is
+17
V
.
Yes
N
o
[
V
+9D system]
Check that the voltage
at C1
8
52(+) is
+
8
.3
V
.
• Check the connections at D1
8
52 and C
N
1
8
01.
• Check the connection between the AJKB
and
CO
NN
ECTOR Assys (15-pin FFC).
• Check the connection between the
CO
NN
ECTOR and D
V
DM Assys (29-pin FFC).
Check
that the voltage
at
V
+6R5
V
is
+6.5
V
.
Are the pins bridged at IC101?
N
o
Is IC1
8
52
damaged?
Yes
Replace IC1
8
52.
N
o
Yes
N
o
[
V
+6R5
V
system]
Check that the voltage
at C1
8
54(+) is
+11
V
.
A
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