Pioneer PRO-141FD Service Manual page 55

5
Failure analysis for the
drive system => DR3
The abnormality is associated with
one ADDRESS or one TCP.
Is the TCP control signal normal?
Yes
Replace the panel chassis.
In most cases of damage on one line,
the panel chassis must be replaced.
Failure analysis for the
drive system => DR4
The abnormality is associated
with a single scan line.
Is the waveform normal when the
voltage is applied to the panel?
(See the oscilloscope photos.)
Note1
Yes
Replace the SCAN IC.
NG
Replace the panel chassis.
Note 1:
In a case where confirmation of the waveform for a particular line is impossible with
an oscilloscope, it is possible to identify a defective line by lighting a particular line,
using the following commands: (The SCAN IC outputting each line refers to the table.)
PON
FAY
MKRS01
BSMS01 (Command for reducing phosphor burn-in)
$250000∗∗∗∗ (In place of ∗∗∗∗, input a figure between 0001 and 1080, which denotes
an ordinal number of a particular line.)
With the above commands, a particular line lights. Be careful to light a line for as
short a time as possible, to avoid phosphor burn-in.
After a particular line is identified, display an all-white screen to protect the screen
from burn-in.
5
6
Diagnose the ADDRESS Assy.
No
Are the FFC cables properly
connected?
Yes
NG
Replace the DIGITAL Assy.
Diagnose the SCAN Assy.
No
Is the 15P connector connected
properly to the socket?
Yes
Is the waveform of the SCAN IC
control signal from the Y DRIVE
Assy normal?
Yes
PRO-141FD
6
7
No
Properly connect the FFC cables.
NG
If the FFC cable that connects the DIGITAL and ADDRESS Assys is in failure,
the abnormality is associated with one address in most cases.
No
Reconnect the connector properly.
NG
No
Replace the Y DRIVE Assy.
IC No. Line Number
No 1 66
No 2 68
No 3 68
No 4 68
No 5 68
No 6 68
No 7 68
No 8 66
No 9 66
No 10 68
No 11 68
No 12 68
No 13 68
No 14 68
No 15 68
No 16 66
7
8
Object Line
0001 to 0066
0067 to 0134
0135 to 0202
0203 to 0270
0271 to 0338
0339 to 0406
0407 to 0474
0475 to 0540
0541 to 0606
0607 to 0674
0675 to 0742
0743 to 0810
0811 to 0878
0879 to 0946
0947 to 1014
1015 to 1080
55
8
A
B
C
D
E
F