Yamaha 01x, Service Manual

Page: 70 / 153

70
O1X
4.3 Switch input check (PN circuit board) .....
(03) SWITCH (PN)
(1) Outline
The key condition of all switches on the PN circuit board is
read.
03:SWITCH (PN)
PUSH ->xxxxxxxxx
Have the function name of the switch to be checked flashed on
the LCD and press the applicable switch. If a judgment is made
that a switch other than the applicable one is turned on or a
multiple number of switches are turned on simultaneously, "NG"
is displayed beside each switch name and each "NG" remains
on until only the correct switch is turned on. When the key
condition can be read properly and the switch is judged as being
turned off, the function name of the next switch to be checked
is displayed (flashing).
(2) Execution method in the normal state
Press all the switches starting from the key located at the upper
left of the panel toward the one at the lower right. Then connect
the foot switch to the FOOT SWITCH 1 terminal and FOOT
SWITCH 2 terminal and depress it.
When all switches are read in the proper order, the screen returns
to the execution select screen and "O" is displayed in the check
item space.
(3) Execution method in the faulty state
To terminate before the end due to an error, press the [CURSOR
＜
] and [CURSOR
＞
] keys. 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 SW matrix, etc.
PN SW (SW***) SW
4.4 Switch input check (RE circuit board) .....
(04) SWITCH (RE)
(1) Outline
The key condition of all switches on the RE CIRCUIT BOARD.
is read.
04:SWITCH(RE)
PUSH ->xxxxxxxxx
Have the function name of the switch to be checked flashed on
the LCD and press the applicable switch. If a judgment is made
that a switch other than the applicable one is turned on or a
multiple number of switches are turned on simultaneously, "NG"
is displayed beside each switch name and each "NG" remains
on until only the correct switch is turned on. When the key
condition can be read properly and the switch is judged as being
turned off, the function name of the next switch to be checked
is displayed (flashing).
(2) Execution method in the normal state
Press all the switches starting from the key located at the upper
left of the panel toward the one at the lower right.
When all switches are read in the proper order, the screen returns
to the execution select screen and "O" is displayed in the check
item space.
(3) Execution method in the faulty state
To terminate before the end due to an error, press the [CURSOR
＜ ] and [CURSOR ＞ ] keys. 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 SW matrix, etc.
RE SW (SW***) SW
4.5 ENCODER function check .....
(05) ENCODER
(1) Outline
The condition of all ENCODERs is read.
05:ENCODER
KNOB-1 ->Rxx EXIT
Have the encoder to be checked displayed on the LCD. When
the ENCODER is operated, its count value is displayed. Testing
starts with the counting up function(clockwise rotation) and
when the preset value is reached, testing moves on to the
counting down function(counterclockwise rotation).
(2) Execution method in the normal state
The counting function of [KNOB-1] is checked first. When the
check result is OK, checking moves on to [KNOB-2] and finally
to [JOG]. If the counting function is all OK, the screen returns
to the execution select screen and "O" is displayed in the check
item space.