JVC GY-HM600U Service Manual page 20

4.2.5 Audio adjustment
Perform this adjustment only when you change a microphone.
No. Adjustment Adjustment
item type
1 AUDIO XLR Manual ad-
Level justment
INPUT1
LINE Level
2 AUDIO XLR Manual ad-
Level justment
INPUT1
MIC Level
3 AUDIO XLR Manual ad-
Level justment
INPUT2
LINE Level
4 AUDIO XLR Manual ad-
Level justment
INPUT2
MIC Level
5 AUDIO Manual ad-
Built-in mi- justment
crophone
1-20 (No.HC047<Rev.001>)
Jig Signal Adjustment
point
Audio 1kHz ADC DATA -20dBFS
signal (+4dBu)
gener-
ator
Audio 1kHz ADC DATA -20dBFS
signal (-50dBu)
gener-
ator
Audio 1kHz ADC DATA -20dBFS
signal (+4dBu)
gener-
ator
Audio 1kHz ADC DATA -20dBFS
signal (-50dBu)
gener-
ator
2CH 300Hz LINE OUT
Audio (400 to
Analyz- 700mV)
er,
Sound
source,
Speak-
er
standard Adjustment Adjustment
value range default value
±8
(3277 as
decimal
value)
±8
(3277 as
decimal
value)
±8
(3277 as
decimal
value)
±8
(3277 as
decimal
value)
Rch=Lch ±8
Procedure
(1) Switch XLR1 input to LINE.
(2) Choose ADJ tab -> Audio tab, press the
[Read] button of XLR LINE1 LEV.
(3) Adjust by operating the slider so that the
on-screen level meter indication comes
to -20dB.
(1) Switch XLR1 input to MIC.
(2) Choose ADJ tab -> Audio tab, press the
[Read] button of XLR MIC1 LEV.
(3) Adjust by operating the slider so that the
on-screen level meter indication comes
to -20dB.
(1) Switch XLR2 input to LINE.
(2) Choose ADJ tab -> Audio tab, press the
[Read] button of XLR LINE2 LEV.
(3) Adjust by operating the slider so that the
on-screen level meter indication comes
to -20dB.
(1) Switch XLR2 input to MIC.
(2) Choose ADJ tab -> Audio tab, press the
[Read] button of XLR MIC2 LEV.
(3) Adjust by operating the slider so that the
on-screen level meter indication comes
to -20dB.
(1) Set both CH1 INPUT SELECT and CH2
INPUT SELECT to INT.
(2) Put a camera so that a built-in micro-
phone faces straight to the speaker,
apart 20 cm or more from each other.
(3) Output the 300Hz sine wave from the
speaker. Adjust the audio output level of
the speaker so that the audio output
comes to 400 ~ 700 mVrms.
(4) Choose ADJ tab -> Audio tab, press the
[Read] button of MIC BALANCE.
(5) Adjust by operating the slider so that the
value differences between Lch Eva Val
and Rch Eva Val are minimized.