Yamaha 01x, Service Manual

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O1X
(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 REC2
DM CI-SUB (IC403) Gate array for reading of rotary
encoder
RE ENCODER
Rotary encoder
(EC201-208)
PN1 ENCODER (EC101) Rotary encoder
4.6 ENCODER function check (PN circuit board) .....
(06) ENCODER (PN)
(1) Outline
The condition of ENCODERs on the PN circuit board is read.
06:ENCODER(PN)
JOG ->0 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
If the counting function of [JOG] is OK, 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 [KNOB-8].
The screen returns to the execution select screen and "X" is
displayed in the check item space.
(4) Item description and error message
None
4.7 ENCODER function check (RE circuit board) .....
(07) ENCODER (RE)
(1) Outline
The condition of ENCODERs on the RE circuit board is read.
07: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 on 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 [KNOB-8]. If the counting function is all OK, 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 [KNOB-8].
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 REC2
DM CI-SUB (IC403) Gate array for reading of rotary
encoder
RE ENCODER
Rotary encoder
(EC201-208)
(3) Execution method in the faulty state
To terminate before the end due to an error, press the [KNOB-
8]. 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 REC2
DM CI-SUB (IC403) Gate array for reading of rotary
encoder
PN1 ENCODER (EC101) Rotary encoder