•
A/D processing for FOOT CONTROL 1/2 and EXP-100F, port input processing for the
jack switch.
•
Port input processing for CU-1
•
Transmission to MGH-106A i.MX6 in SPI MASTER mode
Update is handled with connecting the emulator to J314 and rewriting the U19 internal FlashROM.
2.2.9 Jacks and switches
Name
No.
Type
Remark
LINE OUT L/MONO
JK1
6.3
Φ
stereo
with insert switch
LINE OUT R
JK2
6.3
Φ
stereo
with insert switch
HEADPHONE mini
JK7
3.5
Φ
stereo
MIDI OUT/PEDAL IN/LM IN
JK3
three DIN
FOOT CNT1
JK4
6.3
Φ
stereo
with insert switch
FOOT CNT1 TYPE SELECT
SW1
mini slide
for FOOT CNT1
FOOT CNT2
JK6
6.3
Φ
stereo
with insert switch
FOOT CNT2 TYPE SELECT
SW2
mini slide
for FOOT CNT2
EXP-100F
JK5
8pin DIN
monitor the lamp power source and
detect insertion
2.2.10 other I/O
Connect between the external I/O of MGH-106A and the external drive.
Operate the voltage level translation as necessary.
•
OLED I/F(J306)
Level translation of +3.3V and +5V
•
11pin(J305)
Level translation of FAST,SLOW and DETECT
•
to CNH-44A(J304)
H-bus I/F, the bottom panel headphones, CU-1 and Level translation of H-bus 1.8V
→
+3.3V).
•
turning o
ff
the power switch remotely(J307)
It deliver 455mA for turning o
ff
the power switch, so it drives with transistor Q5 2SC2873Y.
•
switch scan(J303)
Relay from MGH-106A to SWH-536A.
2.2.11 Countermeasure for pop noise
Pop noise is caused by the following sources when power ON/OFF.
•
Analog volume control
•
Operational amplifier
•
When inputting the digital clock to CODEC and when the system is shut down.
10-5
