Sony HDVF-C30W Maintenance Manual page 23

2. Diagnostics of PR-267 Board
Equipment required
. Camera
. Oscilloscope
(1) Diagnostics of B side of the PR-267 board
Fixture
Connecting cable
Preparations
1. Preparation of diagnostics has already been completed
using the EX-909 board.
2. Set the switch S2-4 on the PR-267 board to OFF.
3. Remove the EX-909 board.
m
. Do not disconnect the connecting cable from the
connector (CN1) on the PR-267 board.
. Do not disconnect the harness from the connector
(CN2) on the RE-208 board.
Diagnostics points
Check the following points with an oscilloscope and
confirm that the waveforms, signals and voltages are
normal.
n
The alphanumeric in parentheses ( ) of Ref.No. indicates
the addresses on the board.
(1) Pin-6/IC7 (B-1)
1.9 V
1.02 V
(2) Pin-6/IC5 (B-1)
1.5 V
0.9 V
PB VIDEO
HDVF-C30W
Y VIDEO
(3) Pin-6/IC6 (B-1)
1.5 V
0.9 V
PR VIDEO
(4) Pin-4/IC17 (C-2)
. Controlling AD start signal: 1 pulse/1 H
(5) Voltage
. R95 (A-1) :
DC 1.5 V
. Pin-14/IC22 (B-1) : DC 0.5 V
. Emitter/Q17 (B-1) : DC 2.0 V
R95
IC6
IC22
IC5
IC7
Q17
IC17
PR-267 (B side)
1-17 (E)