Sony DNW-A100 Maintenance Manual page 67

5. LAU PB Level Adjustment
1. Set the audio analyzer as follows:
Function mode: LEVEL, dBm (600 Z)
Input filter: 80 kHz LPF
CH2 adjustment
2. Connect the audio analyzer's input to AUDIO OUT-
PUT CH2 connector.
When the VTR is equipped with BKNW-105 (optional
kit), connect the audio analyzer to MONITOR OUT-
PUT R connector.
3. Play back the 1 kHz, 0 VU portion (0:00 to 2:55) of
the following alignment tape in PLAY mode.
For DNW-A100/A50/A45:
For DNW-A100P/A50P/A45P: CR8-1B PS
4. Adjust the audio level on the audio analyzer.
1RV605/APR-12(F-1)
Adj. point:
Specification: +4.0 ± 0.2 dBm (at 600 Z load)
CH1 adjustment
5. Connect the audio analyzer's input to AUDIO OUT-
PUT CH1 connector.
When the VTR is equipped the BKNW-105, connect it
to MONITOR OUTPUT L connector
6. Play back the 1 kHz, 0 VU portion (0:00 to 2:55) of
the CR8-1A or CR8-1B PS in PLAY mode.
7. Adjust the audio level on the audio analyzer.
1RV504/APR-12(B-1)
Adj. point:
Specification: +4.0 ± 0.2 dBm (at 600 Z load)
A B C
A No.
RV504
E500
RV502
TP501
TP500
RV500
S500
RV503
RV501
COR100
TP101 RV103
RV100
COR101
+4 –3
0 –20
20 18 16
RV101
RV102 E100
TP100
COR300
16 18 20
COR301
UNITY (L) VAR (L)
COR302
+4
TP300
0
–3 >EP–GW<
–20
RV300
E300
APR-12 Board (Side A)
DNW-A100/A50/A45
DNW-A100P/A50P/A45P
CR8-1A
D APR–12 E F G
LOTNO, S NO,
RV605 E600
TP601
RV602
TP600
RV600
RV603
S600
RV604
RV601
COR200
RV203
TP201
RV200
COR201
+4 –3
0 –20
E200
20 18 16
RV201
RV202
TP200
TP700 TP560
COR400
16 18 20
COR401
UNITY (R) VAR (R)
COR402
+4
TP400
0
–3
–20
RV400
E400
TP701
3-6. Audio System Adjustment (APR-12/13 Boards)
3-6-9. LAU PB System Adjustment (APR-12 Board)
6. LAU PB Phase Adjustment
1. Connect and set the oscilloscope as follows:
X-Y mode
CH-1: Pin 2 (X) of AUDIO OUTPUT CH1 connector
GND: Pin 1 (G) of it, AC
CH-2: Pin 2 (X) of AUDIO OUTPUT CH2 connector
GND: Pin 1 (G) of it, AC
When the VTR is equipped with BKNW-105, connect
the oscilloscope to the following connectors.
CH-1: MONITOR OUTPUT L connector
CH-2: MONITOR OUTPUT R connector
n
An XLR-to-pigtail cable is very convenient to connect
between the oscilloscope and the above-mentioned
connectors.
Prepare two XLR-to-pigtail cables for this adjustment.
And connect the XLR plug end of the cable to above-
mentioned connectors and the pigtailed end to the
oscilloscope. The cables for CH-1 and CH-2 shall be
the same in length and same wire color on the pigtailed
end.
2. For DNW-A100/A50/A45: Play back the 10 kHz, _10
VU portion (3:00 to 4:55) of the alignment tape CR8-
1A in PLAY mode.
For DNW-A100P/A50P/A45P: Play back the 15 kHz,
0 VU portion (3:00 to 4:55) of the alignment tape
CR8-1B PS in PLAY mode.
3. Watch the lissajous waveform on the oscilloscope.
4. Align the vertical and horizontal amplitudes of
lissajous waveform to 60 mm square with the VOLTS/
DIV and VAR controls of the oscilloscope.
5. Minimize the phase difference A of lissajous wave-
1
form.
1RV603/APR-12(F-1)
Adj. point:
2
Specification: A < 5.2 mm (Refer to Figure 3.)
3
Oscilloscope
4
5
60 mm
6
7
Figure 3. Lissajous Waveform of LAU PB Phase Adjustment
60 mm
A
3-31