6-20
DNW-A22/A22P
6-3-2. Electrical Adjustments
Adjustment Items
No. Item
Adjustment point
Remarks
0
Preparation
1
Initial data setting
All data of A3 : BETACAM PB ADJUST
2
EQ RF output level adjustment
METAL Y
A30 : EQ VR : RF GAIN METAL-Y-A
TP100/DM-89
A30 : EQ VR : RF GAIN METAL-Y-B
METAL C
A30 : EQ VR : RF GAIN METAL-C-A
TP300/DM-89
A30 : EQ VR : RF GAIN METAL-C-B
OXIDE C
A30 : EQ VR : RF GAIN OXIDE-C-A
TP300/DM-89
A30 : EQ VR : RF GAIN OXIDE-C-B
OXIDE Y
A30 : EQ VR : RF GAIN OXIDE-Y-A
TP100/DM-89
A30 : EQ VR : RF GAIN OXIDE-Y-B
Data save
A3F : NV-RAM CONTROL
3
Cosine equalizer adjustment
METAL Y
Group delay
1
RV101/DM-89,
1
RV102/DM-89
TP104/DM-89
Main
A33 : DM VR 2 : MAIN METAL-Y-A
TP3/DM-89
A33 : DM VR 2 : MAIN METAL-Y-B
Sub
A34 : DM VR 3 : SUB METAL-Y-A
DNW-A22: Set the data to AF
A34 : DM VR 3 : SUB METAL-Y-B
DNW-A22P: TP2/DM-89
METAL C
Group delay
1
RV301/DM-89,
1
RV302/DM-89
TP304/DM-89
Main
A33 : DM VR 2 : MAIN METAL-C-A
TP7/DM-89
A33 : DM VR 2 : MAIN METAL-C-B
Sub
A34 : DM VR 3 : SUB METAL-C-A
DNW-A22: Set the data to 70
A34 : DM VR 3 : SUB METAL-C-B
DNW-A22P: TP6/DM-89
OXIDE C
Group delay
1
RV303/DM-89,
1
RV304/DM-89
TP304/DM-89
Main
A33 : DM VR 2 : MAIN OXIDE-C-A
TP7/DM-89
A33 : DM VR 2 : MAIN OXIDE-C-B
Sub
A34 : DM VR 3 : SUB OXIDE-C-A
TP6/DM-89
A34 : DM VR 3 : SUB OXIDE-C-B
OXIDE Y
Group delay
1
RV104/DM-89,
1
RV103/DM-89
TP104/DM-89
(RV103 is not equipped on the DM-89 board of LOT Nos. 407 and higher.)
Main
A33 : DM VR 2 : MAIN OXIDE-Y-A
TP3/DM-89
A33 : DM VR 2 : MAIN OXIDE-Y-B
Sub
A34 : DM VR 3 : SUB OXIDE-Y-A
TP2/DM-89
A34 : DM VR 3 : SUB OXIDE-Y-B
OMC DC offset
A35 : DM VR 4 : OMC DC METAL-Y
Set the data to E4
A35 : DM VR 4 : OMC DC METAL-C
Set the data to D0
A35 : DM VR 4 : OMC DC OXIDE-Y
A35 : DM VR 4 : OMC DC OXIDE-C
Data Save
A3F : NV-RAM CONTROL
4
Cosine equalizer provisional adjustment
n
This provisional adjustment explains how to adjust without using the network analyzer as
opposed to adjustment (No. 3) using the network analyzer.
Perform this provisional adjustment only when the network analyzer is not available for an
urgent maintenance. Be sure to perform the adjustment (No. 3) using the network analyzer at
a later date.
OMC; Over-Modulation Compensation circuit
(Continue)
6-3. DM-89 Board Replacement