Pioneer MEP-7000 Service Manual page 61

5
No. Points to be checked
An image is displayed on the center display but not on the monitor connected via MONITOR OUT.
1 -
2 -
CONTROL
3
UNIT
4 NMAIN ASSY
5 NMAIN ASSY
6 NMAIN ASSY
7 NMAIN ASSY
[3-3] If the display on the center display or the monitor connected via MONITOR OUT is abnormal
No. Points to be checked
1 -
[3-4] The controller A/B display (DISP Assy) has not started. (OEL, LEDs not lit)
No. Points to be checked
1 -
[3-5] The OEL is not lit
No. Points to be checked
1 Cable
5
6
Waveform Items for check
Check that the UTILITY monitor
-
out setting is set to ON.
Check the status of the video
encoder with the auto device
150
diagnosis, the status LEDs, or the
pulse waveform.
Check the waveform of the
VIDEO OUT signal.
126,
127
Check the input/output signal to
128~
VIDEO AMP (IC1603).
133
Check if the clock signal (27
MHz) is input to the video
encoder (IC1600).
114
Check if the V_RST# and
DATAENV signals are output from
123
the CPLD (IC1700) and input to
the video encoder (IC1600).
If the problem is not resolved
- even after the above-mentioned
measures are taken
Waveform Items for check
On the monitor connected via
MONITOR OUT, compare the
displays of (1) VRAM TEST
PATTERN (F1 key) and (2) TV
TEST PATTERN SETTING
(F2 key) in Service mode for the
control unit, and check which one
-
flickers: (1): This test pattern
video signal is output from the
NORTH CPU (IC601). (2): This
test pattern output signal is a
video signal built into the video
encoder (IC1600).
Waveform Items for check
Check the status of the SIDE
152,
PANEL microcomputer with the
153
auto device diagnosis or the
status LEDs.
Waveform Items for check
Check if the cables that connect
the DISP and OELB Assys are
-
securely connected and if there is
breakage in the cables.
6
7
Monitor out ON/OFF can be set on the menu.
If the video encoder (IC1600) is judged as NG,
it has not been correctly started up. See "[8]
Auto Device Diagnosis/Status LEDs" in this
section.
Check the point where the VIDEO OUT signal
is interrupted, by inspecting the waveform. If
the signal is interrupted at VIDEO AMP
(IC1603), go to [4]. If the signal is interrupted at
the video encoder (IC1600), go to [5].
Check the mounting status of the VIDEO AMP
(IC1603). If it is properly mounted, it may be
defective; replace it.
As this clock signal is for video output signals,
connection disruption cannot be detected by
auto device diagnosis. Check the mounting
status of the crystal oscillator (X1600) and its
peripheral devices. If they are properly
mounted, they may be defective; replace them.
If there is no signal output, check the mounting
status of CPLD (IC1700). If it is properly
mounted, the port connector may be defective;
replace it.
Replace the MNAIN ASSY.
If only the display (1) is abnormal, poor
connection between the NORTH CPU (IC601)
and the video encoder (IC1600) is suspected.
Check the mounting status of the NORTH CPU
(IC601). If it is properly mounted, it may be
defective; replace the NMAIN Assy.
If both displays (1) and (2) are abnormal, poor
con-nection after the video encoder (IC1600) is
suspected. Check the mounting status of
VIDEO AMP (IC1603) or its peripheral parts. If
they are properly mounted, they may be
defective.
Replace the NMAIN Assy.
If the SIDE PANEL microcomputer (IC2600) is
judged as NG, it has not properly started up.
See "[8] Auto Device Diagnosis/Status LEDs"
in this section.
If a connection is loose, firmly connect the
cables. If there is breakage, replace the cable.
MEP-7000
7
8
Causes and measures
Causes and measures
Causes and measures
Causes and measures
8
A
B
C
D
E
F
61