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3-6. AUDIO SYSTEM ADJUSTMENT
• Perform the adjustment using color bar signal as a video signal
input for the VIDEO terminal.
• The items to be adjusted for the R channel will be indicated within
the [ ], in regard to the adjusting items to be adjusted for both L
and R channels.
• Set the Hi-Fi sound switch in the menu display to "STEREO"
position unless specified otherwise.
Note :
1) When inputting the audio signal, input same signal to both the L and R
channels, unless otherwise.
2) Be sure insert the plug (Shorting plug or dummy plug, etc) into the
AUDIO terminal (Right). If the plug is not inserted, the monaural mode
will be set, and correct adjustments can not be carried out.
[Monaural mode]
During recording ............... REC AFM RF 1.7MHz carrier will not be
output.
During playback ................ The L + R signal will be output from the
AUDIO terminal (Left).
In Recording
Pattern generator
Video output
(75 Ω )
Audio
oscillator
Attenuator
600 Ω (270 Ω (1-249-410-11) +330 Ω (1-249-411-11))
In Playback
Main unit
VIDEO
L
AUDIO
R
Main unit
VIDEO
L
600 Ω
R
Audio level meter or
distortion meter
47k Ω
47k Ω :1-249-437-11
TV monitor
47k Ω :1-249-437-11
[Connecting the measuring instruments for the audio]
Connect the audio system measuring instruments in addition to the
video system measuring instruments as shown in Fig. 5-3-19, and
perform adjustments at the power switch [VTR] position.
[Adjustment Procedure]
1) 1.5MHz deviation adjustment
2) 1.7MHz deviation adjustment
3) BPF adjustment
When connecting AFM DEV jig.
Stabilized power supply
(+7Vdc to +9Vdc)
+
–
AUDIO
Oscilloscope
TP28(DC)
CH1
CH2
Red
White
TP1(GND)
TP2(R OUT) B
TP3(L OUT) A
To Audio terminal
White
Red
Fig. 5-3-19.
5-44
B
A
TP27
INV
SIN
(GND)
S3
TP33(GND)
TP32(R OUT 1) B
TP31(L OUT 1) A
TP30(R OUT 2)
TP29(L OUT 2)
J1(R)
J2(L)
TP26
J3
TP24
TP25
CN2
CN1
Use the CPC-7 jig
(J-6082-382-A)
8 0 !¡
CN910
L
R
VC-214 board
A :1.5MHz deviation adjustment.
B :1.7MHz deviation adjustment.
AFM DEV jig
(J-6082-312-A)
S2
PAL
NT
ST
S1
BIL
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