Jacks And Switches; Other I/O; Countermeasure For Pop Noise - Hammond XK-5 Service Manual
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Also See for XK-5:
- Owner's playing manual (174 pages) ,
- Owner's manual (170 pages) ,
- Quick start manual (42 pages)
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• 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
LINE OUT L/MONO
LINE OUT R
HEADPHONE mini
MIDI OUT/PEDAL IN/LM IN
FOOT CNT1
FOOT CNT1 TYPE SELECT
FOOT CNT2
FOOT CNT2 TYPE SELECT
EXP-100F
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 signal(+1.8V→+3.3V).
• turning off the power switch remotely(J307)
It deliver 455mA for turning off 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.
No.
Type
Remark
JK1
6.3Φstereo
with insert switch
JK2
6.3Φstereo
with insert switch
JK7
3.5Φstereo
JK3
three DIN
JK4
6.3Φstereo
with insert switch
SW1
mini slide
for FOOT CNT1
JK6
6.3Φstereo
with insert switch
SW2
mini slide
for FOOT CNT2
JK5
8pin DIN
monitor the lamp power source and
detect insertion
10-5
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