Meter Bridge Test; Internal Process Of The Software - Yamaha M7CL-32 Service Manual

10. Moves to the top end (11000B) and measures the travel time.
* Compared with the previous travel time as each upward
travel time is measured and judged as OK if the travel
time is shorter than the previous one.
The judgment result is shown by lighting of the SEL/CUE/ON
LESs above each fader.
Bit (0—4) judged as "NG" is given in hexadecimal using three
LEDs SEL/CUE/ON.
bit0 NG: ON LED is lit,
bit1 NG: CUE-LED is lit,
bit2 NG: CUE, and ON-LED are lit,
bit3 NG: SEL-LED is lit,
bit4 NG: SEL and ON-LED are lit
Check the following.
· Make sure that all the SEL/CUE/ON LEDs above each fader
are turned off.
Press any one key and then release it to proceed to the next
fader test (test a).
4) Switch Input Test
Checks by manually controlling controllers on the circuit board.
a) Switch
LEDs for each switch are lit in advance by software.
Press and release and the corresponding LED will turn off.
Check all the switches.
Check the following.
· Check visually if all the LEDs which were lit in advance have
been turned off.
Do not press more than one switch at the same time, or the LEDs
will not turn off.
For the switch without corresponding LED, an LED near the
switch will be lit instead.
b) Encoder
* Same as the item "a) Switch".
5) Encoder/Analog Volume Input test
a) Encoder
The LED near each encoder is lit in advance by software.
Turn clockwise and counterclockwise and the corresponding
LED will turn off.
Check all the encoders.
Check the followings.
· Check visually if all the LEDs which were lit in advance have
been turned off.
* The LEDs corresponding to the encoders are the same as "b)
Encoder" in "4) Switch Input Test".

∗ Internal process of the software

Judged as "OK" if plus and minus values are read by the
control.
b) Analog Volume
The LED near the analog volume is lit in advance by software.
Turn clockwise fully and then counterclockwise fully and the
corresponding LED will be turned off.
Check the following.
· Check visually if all the LEDs which were lit in advance have
been turned off.
∗ Internal process of the software
Judged as "OK" if 2 or below is read when turned clockwise
fully and 254 or over is read when turned counterclockwise
fully as message is informed when the analog volume value is
changed by 3.
(Theoretically, the value should be "255 or over" instead of
"254 or over", but the application actually uses the value "254
or over" for judgment.)

1-24 METER BRIDGE test

Contents: Checks the METER BRIDGE.
Check that all the LEDs will light, and that 3 blocks
of 12 x 8 LEDs, LEDs in 12 horizontal lines, and 8
LEDs in every 3 vertical line will flash. Judged OK
is they appear as if they are moving.
(METER BRIDGE: Vertical line lights from left to right.)
1. All the LEDs (12 point Meter) in MIX#1 will light.
2. All the LEDs (12 point Meter) in MIX#2 will light.
3. All the LEDs (12 point Meter) in MIX#3 will light.
4. All the LEDs (12 point Meter) in MIX#4 will light.
5. All the LEDs (12 point Meter) in MIX#5 will light.
6. All the LEDs (12 point Meter) in MIX#6 will light.
7. All the LEDs (12 point Meter) in MIX#7 will light.
8. All the LEDs (12 point Meter) in MIX#8 will light.
9. All the LEDs (12 point Meter) in MIX#9 will light.
10. All the LEDs (12 point Meter) in MIX#10 will light.
11. All the LEDs (12 point Meter) in MIX#11 will light.
12. All the LEDs (12 point Meter) in MIX#12 will light.
13. All the LEDs (12 point Meter) in MIX#13 will light.
14. All the LEDs (12 point Meter) in MIX#14 will light.
15. All the LEDs (12 point Meter) in MIX#15 will light.
16. All the LEDs (12 point Meter) in MIX#16 will light.
17. All the LEDs (12 point Meter) in MATRIX#1 will light.
18. All the LEDs (12 point Meter) in MATRIX#2 will light.
19. All the LEDs (12 point Meter) in MATRIX#3 will light.
20. All the LEDs (12 point Meter) in MATRIX#4 will light.
21. All the LEDs (12 point Meter) in MATRIX#5 will light.
22. All the LEDs (12 point Meter) in MATRIX#6 will light.
23. All the LEDs (12 point Meter) in MATRIX#7 will light.
24. All the LEDs (12 point Meter) in MATRIX#8 will light.
M7CL-32/M7CL-48
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