Sony TRINITRON BVM-14G1A Operation And Maintenance Manual page 74

2. Clamp Level Adjustment
Note: The following adjustment menus are under the BK
BOARD menu of the MAINTENANCE menu.
Y CLAMP OFFSET
R–Y CLAMP OFFSET
B–Y CLAMP OFFSET
1. Input the component color bar signal (YUV SMPTE/
EBU-N10).
2. Connect the oscilloscope to TP101.
3. As shown in Fig. 5-4, adjust the Y CLAMP OFFSET
data so that the pedestal and clamp offset pulse level
becomes equal.
This part
Level difference: 0 ±2 mV
Fig. 5-4
4. Connect the oscilloscope to TP302.
5. As shown in Fig. 5-5, adjust the R–Y CLAMP OFFSET
data so that the pedestal and clamp offset pulse level
becomes equal.
This part
Level difference: 0 ±2 mV
Fig. 5-5
5-2
Make flat
÷
Make flat
÷
6. Connect the oscilloscope to TP502.
7. As shown in Fig. 5-6, adjust the B–Y CLAMP OFFSET
data so that the pedestal and clamp offset pulse level
becomes equal.
This part
Level difference: 0 ±2 mV
Fig. 5-6
Make flat
÷