Audio System Adjustment; Pb Level/Distortion Adjustment; Input Level Adjustment - Sony DVW-250 Maintenance Manual

9-4. Audio System Adjustment

9-4. Audio System Adjustment

9-4-1. PB Level/Distortion Adjustment

Preparation
• SL1-SL8/ADA-44 → OPEN (Head room : 20 dB)
• CH-3/4 OUT switch/connector panel → LINE
• Put the unit into the EE mode.
MODE switch/connector panel → PB/EE
Put the unit into STOP mode.
• On the setup menu, set PAGE and ITEM as follows.
: <AUDIO>
PAGE
: INPUT 1/2 → ANA
ITEM
: INPUT 3/4 → ANA
ITEM
: EMPHASIS → OFF
ITEM
• On the DIAG menu, set PAGE and ITEM as follows.
: <TEST><PROC1>
PAGE
: AUDIO TEST → 1 (1 kHz, 0 dB)
ITEM
Adjustment procedure
1. CH-1 PB Level Adjustment
: Audio level meter
Equipment
: AUDIO OUT CH-1 connector
Test point
Adjustment point : 1RV205 (C-2 : B) /ADA-44
: +4.0 ±0.1 dBm (600 Ω)
Specification
2. CH-1 Distortion Adjustment
: Audio distortion meter
Equipment
: AUDIO OUT CH-1 connector
Test point
Adjustment point : 1RV201 (A-3 : B) /ADA-44
: Minimum (0.03% or less)
Specification
3. Adjust the distortion for channnel-2 through 4 in the
same way.
Test point
PB level
CH-2 AUDIO OUT CH-2 1RV206 (D-2 : B) 1RV202 (A-3 : B)
CH-3 AUDIO OUT CH-3 1RV207 (E-2 : B) 1RV203 (A-2 : B)
CH-4 AUDIO OUT CH-4 1RV208 (E-2 : B) 1RV204 (A-2 : B)
4. Setting after adjustment
Reset switches and menu to the former positions.
9-8
Adjustment point
Distortion

9-4-2. INPUT Level Adjustment

Preparation
• SL1-SL8/ADA-44 → OPEN (Head room : 20dB)
• Put the unit into the EE mode.
MODE switch/connector panel → PB/EE
Put the unit into STOP mode.
• CH-3/4 OUT switch/connector panel → LINE
• CAMERA/LINE switches (CH-1 through CH-4) /
connector panel → LINE
• -60/-20/+4 dB switches (CH-1 through CH-4) /connector
panel → +4 dB
• AUDIO REC LEVEL ON/OFF/PRESET switches
(CH-1 through CH-4) /connector panel → PRESET
• AUDIO PB LEVEL knob (CH-1 through CH-4)
/front panel → fully clockwise (MAX)
• On the setup menu, set PAGE and ITEM as follows.
: <AUDIO>
PAGE
: INPUT 1/2 → ANA
ITEM
: INPUT 3/4 → ANA
ITEM
: EMPHASIS → OFF
ITEM
Adjustment procedure
1. CH-1 INPUT Level Adjustment
Inputs 1 kHz +4 dBu signal to the AUDIO IN CH-1
connector on the connector panel.
: Audio level meter
Equipment
: AUDIO OUT CH-1 connector
Test point
Adjustment point : 1RV1 (L-3 : B) /ADA-44
: +10.0 ±0.1 dBm (600 Ω)
Specification
2. Adjust the distortion for channnel-2 through 4 in the
same way.
Test point
CH-2 AUDIO OUT CH-2
CH-3 AUDIO OUT CH-3
CH-4 AUDIO OUT CH-4
3. Setting after adjustment
• AUDIO PB LEVEL knob (CH-1 through CH-4) /
front panel → reference level position (+4 dBm)
• Reset switches and menu to the former positions.
Adjustment point
1RV2 (L-2 : B)
1RV3 (L-2 : B)
1RV4 (L-2 : B)
DVW-250/250P