Ch2 Unity Level Adjustment (For Vca); Side Vr Voltage Adjustment (For Vca - Sony HDW-750 Maintenance Manual

10-2. Audio System Alignment

10-2-2. CH2 Unity Level Adjustment (for VCA)

Preparation
. Complete the setting as shown below by using the setup
menu.
MENU : MAINTENANCE
PAGE : 07*VTR MODE-2
ITEM : REAR1/WRR VR SEL → F+S1
ITEM : REAR2/WRR VR SEL → F+S2
. MIC control knob/front panel → Fully clockwise
rotation
. AUDIO LEVEL CH2 control knob/inside panel
→ Reference position
. AUDIO SELECT switch CH2/inside panel
→ MANUAL
. Connect sine wave of 1 kHz at +4 dBu to AUDIO IN
CH2 connector/rear panel.
Adjustment Procedure
1. Equipment : Audio analyzer
Measurement point : TP102 (B-3)/FP-121 board
(B side)
Adjustment point : 1RV20 (F-4)/FP-121 board
(B side)
_20 ± 0.1 dBu
Specifications :
2. Equipment : Audio analyzer
Measurement point : TP4 (F-4)/FP-121 board (B side)
Confirm that the audio signal satisfies the specifica-
tions of _33 ± 1.5 dBu.
10-2

10-2-3. SIDE VR Voltage Adjustment (for VCA)

Preparation
. Complete the setting as shown below by using the setup
menu.
MENU : MAINTENANCE
PAGE : 07*VTR MODE-2
ITEM : REAR1/WRR VR SEL → SIDE1
ITEM : REAR2/WRR VR SEL → SIDE2
. AUDIO LEVEL CH1 control knob/inside panel
→ Reference position
. AUDIO SELECT switch CH1/inside panel
→ MANUAL
. AUDIO SELECT switch CH2/inside panel
→ MANUAL
. Connect sine wave of 1 kHz at +4 dBu to AUDIO IN
CH1 connector/rear panel.
. Connect sine wave of 1 kHz at +4 dBu to AUDIO IN
CH2 connector/rear panel.
Adjustment Procedure
1. Equipment : Audio analyzer
Measurement point : TP101 (D-3)/FP-121 board
(B side)
Adjustment point : 1RV11 (F-5)/FP-121 board
(B side)
_20 ± 0.1 dBu
Specifications :
2. Equipment : Audio analyzer
Measurement point : TP201 (C-3)/FP-121 board
(B side)
Confirm that the audio signal satisfies the specifica-
tions of _20 ± 0.5 dBu.
G F E D
TP809
TP813
TP808
TP807
TP812
TP806
TP804
TP803
RV152
TP101
RV151
RV22
RV12
RV10
RV20
TP4 TP3
TP401
RV11
RV13 TP6 TP5
RV23
E501
C
1
A
TP810
B
2
TP811
RV502
TP201
RV501
3
TP102
TP202
4
RV503
TP302
RV150 RV153
5
TP501
6
FP-121 board (B side)
HDW-750/750CE V1