Sony HDVF-C30W Maintenance Manual page 24

(2) Diagnostics of A side of the PR-267 board
Diagnostics of the A side of PR-267 board is performed by
connecting the RE-208 EX unit.
Fixtures
. Connecting cable
. RE-208 EX unit
Connecting diagram
PR-267
CN2
Oscilloscope
Camera
CN1
Connecting
cable
Preparation
Perform steps 3 to 7 of "1-9-2. How To Extend the RE-208
Board".
Diagnostics points
Check the following points with an oscilloscope and con-
firm that the waveforms, signals and voltages are normal.
(1) Pin-6/IC1 (B-1)
2.5 V
1.9 V
0.4 V
Y VIDEO
(2) Pin-1 and 2/CN1 (A-2)
. Confirm that the signal is output.
(Amplitude of 3 to 5 V)
(3) Pin-15/IC11, IC12 (C-3), IC13 (B-3)
. Clock pulse for video signal : 37 MHz
(4) Voltage
. Collector/Q3 (B-1) : DC 3.0 ± 0.1 V
. Collector/Q16 (A-1) : DC 2.5 ± 0.1 V
1-18 (E)
Connecting
harness
CN2
CN2
CN1
EX-908
EX-907
CN1
CN1
RE-208
. Pin-8/X1 (A-2) : DC 1.0 to 2.0 V
. Pin-7/CN7 (C-1) :
Voltage changes from 0 to 2.0 V
when RV6/VR-280 board is rotated.
. Pin-8/CN7 (C-1) :
Voltage changes from 0 to 2.0 V
when the CONTR control is rotated.
. Pin-9/CN7 (C-1) : Voltage changes from 0 to 2.0 V
when RV4/VR-280 board is rotated.
. Pin-10/CN7 (C-1) : Voltage changes from 0 to 2.0 V
when the BRIGHT control is
rotated.
. Pin-11/CN7 (C-1) : Voltage changes from 0 to 2.0 V
when RV2/VR-280 board is rotated.
. Pin-12/CN7 (C-1) : Voltage changes from 0 to 2.0 V
when the PEAKING control is
rotated.
CN2
IC13
IC12
IC11
PR-267 (A side)
CN1
X1
Q16
Q3
CN7
IC1
HDVF-C30W