Yamaha N12 - n12 Digital Mixing Studio, Service Manual

Page: 67 / 245

67
n8/n12
1-4. How to start
(1) While holding down the [
A
] (STOP) key and [
I
] key
simultaneously, turn on the power. (Don’t release the keys
until the version number is displayed as described in step
(2).)
(2) The current version number will be shown on the
MASTER LEVEL METER.
(3) Release the keys and the test program will run in the
service test mode (L: -30 of MASTER LEVEL METER
will light up).
1-5. Program mode and test item indication
An LED at the L side of the MASTER LEVEL METER which
indicates the currently running mode and an LED at the R side
which indicates the test item in the mode will light up.
SWITCH
VOLUME
LED
AUDIO
UART
MUTE ON/OFF is indicated
PAD ON/OFF is indicated
Hi-z ON/OFF is indicated
+48V ON/OFF is indicated
CPU/MEMORY
Firmware writing
Service test
OVER
-3
-6
-10
-14
-18
-24
-30
-36
-42
-48
-60
L R
The LED corresponding to the currently running mode lights
up. Test items are indicated as follows:
Not lighting: Items which have not been tested or NG items
Lighting:
Items whose test result is OK or items which
need no testing.
For example, LEDs light as follows in the service test mode if
the results of memory check, switch, and LED tests are OK and
the results of other tests are NG or the remaining items have
not been tested.
SWITCH
VOLUME
LED
AUDIO
UART
MUTE ON/OFF is indicated
PAD ON/OFF is indicated
Hi-z ON/OFF is indicated
+48V ON/OFF is indicated
CPU/MEMORY OVER
-3
-6
-10
-14
-18
-24
-30
-36
-42
-48
-60
L R
Firmware writing
Service test
1-6. Selection/Execution of Testing Items
Perform “Execution” through the personal computer. Refer
to “1-8. PC operation method” section for operation of the
personal computer. (Page 67)
Procedures and contents of each item are described in sections
for each test.
The following tests can be executed by pressing the switches as
follows:
· SWITCH test
[MONITOR REMOTE: ON] + [MONITOR REMOTE: REC BUS]
· VOLUME test
[MONITOR REMOTE: REC BUS] + [CLICK REMOTE: ON]
· LED test
[MONITOR REMOTE: ON] + [CLICK REMOTE: ON]
· MUTE
MUTE ON/OFF (DA MUTE): [MUTE] On/Off
1-7. Judgment
Refer to “1-5. Program mode and test item indication” section.
(Page 67)
LEDs at the R side of the MASTER LEVEL METER indicate
the test items as follows:
Not lighting: Items which have not been tested or NG items
Lighting: Items whose test result is OK or items which
need no testing.
Flashing: Items which are currently being tested
1-8. PC operation method
* The following description shows an example of using midi-
ox software for sending/receiving MIDI data.
(1) Connect the personal computer and n8 or n12 with UX16.
(Refer to “1-2. Wiring diagram for service test” on page
65.)
(2) Run the service test program with the n8 or n12. (Refer to
“1-4. How to start” on page 67.)
(3) Run the midi-ox.exe with the personal computer.
(4) Execute “Input Monitor” of “View” menu in the toolbar.
(Photo 1)
(Photo 1)