Sony CCD-TRV312 Operating Instructions (primary manual), Service Manual, Page: 201 / 212

6-76
Fig. 6-4-1
6-4. AUDIO SYSTEM ADJUSTMENT
• The right channel (STEREO) adjustment is performed in
STEREO MODEL only.
• Use the alignment tape for audio system adjustment.
• Connect an audio input signal from VC-188 board CN501 as
shown in Fig.6-4-1.
4-1. EE-OUTPUT LEVEL CHECK
Mode Record
signal CN501 pin
4
INPUT (Left)
CN501 pin
2
INPUT (Right)
400 Hz, –38 dBs
Audio input from CN501 pin
4
,
2
Measurement Point AUDIO output terminal (Left/Right)
(no load)
Measuring Instrument Audio level meter
Specification Value –7.5
±
2.0dBs
Check procedure:
Order Procedure
1 Check that 400 Hz signal level satisfies the
specification.
Alignment tape
〈
MONO model
〉
WR5-5CSP : PAL
WR5-5NSP : NTSC
〈
STEREO
〉
WR5-9CS : PAL
WR5-9NS : NTSC
Audio
transmitter
Attenuater
600
Ω
Pin
4
Pin
2
Pin
3
VC-188 board
CN501
VIDEO CAMERA
RECODER
Audio level meter or
distortion meter
AUDIO output
terminal
47k
Ω
When connecting AFM DEV jig
Stabilized power supply
(+7Vdc to +9Vdc)
TP27
(GND)
T28(DC)
INV
SIN
S3
A B
AFM DEV jig
(J-6082-312-A)
Oscilloscope
CH1
CH2
TP33(GND)
TP32(R OUT 1)
B
TP31(L OUT 1)
A
TP30(R OUT 2)
TP29(L OUT 2)
S2
PAL
NT
S1
ST
BIL
Red
White
J1(R)
J2(L)
J3
TP1(GND)
TP2(R OUT)
B
TP3(L OUT)
A
CN2
4 6 7
CN1
CN2
4 RF SWP
6 REC RF
7 RF GND
CN102
2 REC 2
3 GND
8 RF SWP
VC-188 BOARD
CN102
White
Red
AUDIO L
terminal
AUDIO R
terminal
A
: 1.5MHz deviation adjustment
B
: 1.7MHz deviation adjustment
2
3
8
L
R
L
R
+
–