Yamaha 01x, Service Manual

Page: 72 / 153

72
O1X
4.8 LED lighting check .....
(08) LED
(1) Outline
The LED on the panel is checked visually for proper lighting
by making the segments light from the upper left to the lower
right one after another and then making them flash by area.
08:LED
Lighting sequence: All LED segments from the upper left to the
lower right on the panel
Double color LED should light in the following order.
Green: ON, Red: OFF -> Green: OFF, Red: ON -> Green:
ON, Red: ON (orange)
(2) Execution method in the normal state
After confirming visually that all LED segments light properly,
press [KNOB-8], and the screen returns to the execution select
screen and "O" is displayed in the check item space.
08:LED
NG OK
(3) Execution method in the faulty state
To terminate before the end due to an error, press [KNOB-7].
The screen returns to the execution select screen and "X" is
displayed in the check item space.
(4) Item description and error message
None
(5) Check point when judged as NG
The devices that can be diagnosed by this check are as follows.
Circuit board Device name Function
DM CPU (IC101) Control of CI-SUB
DM CI-SUB (IC403) Gate array for control of LED
matrix, etc.
PN LED (LD***) LED
RE LED (LD***) LED
4.9 LED lighting check (PN circuit board) .....
(09) LED (PN)
(1) Outline
The LED on the panel is checked visually for proper lighting
by making the segments light from the upper left to the lower
right one after another and then making all the LED segments
of PN1 circuit board and PN2 circuit board flash respectively.
09:LED (PN)
Lighting sequence: All LED segments from the upper left to the
lower right on the panel
Double color LED should light in the following order.
Green: ON, Red: OFF -> Green: OFF, Red: ON -> Green:
ON, Red: ON (orange)
(2) Execution method in the normal state
After confirming visually that all LED segments light properly,
press [KNOB-8], and the screen returns to the execution select
screen and "O" is displayed in the check item space.
09:LED (PN)
NG OK
(3) Execution method in the faulty state
To terminate before the end due to an error, press [KNOB-7].
The screen returns to the execution select screen and "X" is
displayed in the check item space.
(4) Item description and error message
None
(5) Check point when judged as NG
The devices that can be diagnosed by this check are as follows.
Circuit board Device name Function
DM CPU (IC101) Control of CI-SUB
DM CI-SUB (IC403) Gate array for control of LED
matrix, etc.
PN LED (LD***) LED