Sony DNW-A100 Maintenance Manual page 164

4-1. DEC-65 Board (BKDW-505/506)
6. Pedestal Level Check
Perform this check after completing the "5. Analog Composite Input Level (AGC) Adjustment".
(1) Connect as connection 2.
(2) Select C21:VIDEO TEST SG of C2:AUDIO/VIDEO CHECK of the maintenance mode.
(3) Set TEST SG output to "Lamp".
(4) Observe the burst signal portion of VIDEO OUTPUT COMPOSITE 2 output with the waveform
monitor or oscilloscope.
Setting of measurement equipment
. Waveform monitor
SWEEP: 1 H, MAG
x5
GAIN:
UNCAL: MAX
. Oscilloscope
DC 0.5 mV/DIV, 2 us/DIV
CH-1:
Band-width limit: ON
(5) Check that the waveform of the pedestal portion satisfies the specification.
VIDEO OUTPUT COMPOSITE 2
(5) When the specification is not satisfied, perform "1. Pedestal Level Adjustment" of Section 4-4-1.
Adjustment again.
4-10
Specification: Check that the difference of the pedestal
portion is not recognized.
DNW-A100/A50/A45
DNW-A100P/A50P/A45P