Cue Bias Adjustment - Sony DVW-250 Maintenance Manual

4. Play back a 12 kHz, -20 VU portion (TIME;04 : 00 :
00 - 04 : 24 : 29) of the alignment tape.
: Audio Analyzer
Equipment
: AUDIO OUT CH-4 connector on
Test point
the connector panel
Adjustment point : 1RV801 (G-1 : B) /EQ-54
: A ±0.7 dBm (600 Ω)
Specification
5. Perform STEP 1 again.
6. Eject the tape.
7. Setting after adjustment
Reset switches to the former positions.
A B C
1
2
3
4
DVW-250/250P
D E F G
CV800
EQ-54 Board A side

9-4-6. CUE Bias Adjustment

Preparation
• Disconnect the cable from the AUDIO IN CH-4 connec-
tor/connector panel.
• CUE REC switch/connector panel → ON
• MODE switch/connector panel → PB/EE
Adjustment procedure
1. Insert a blank tape and put into the REC mode.
: Audio noise meter
2. Equipment
: TP804 (G-1 : B) /EQ-54
Test point
: TP805 (G-1 : B) /EQ-54
GND
Adjustment point : 1CV800 (G-2 : A or B) /EQ-54
: 18 ±1 mV rms
Specification
: Oscilloscope
3. Equipment
: TP803 (G-2 : B) /EQ-54
Test point
: Check that the level is 1.8 Vp-p or
Specification
less.
4. Repeat steps 2 and 3 until the specifications (steps 2
and 3) are met.
G F E
TP804
1 RV803
TP805
RV801 RV802
2
TP803
3
4
9-4. Audio System Adjustment
1.8 Vp-p or less
D C B A
EQ-54 Board B side
9-11