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2-14 (E)
HKDV-900
Are output signals (ON :
+
3 V to
+
4 V/
OFF : GND) of control ICs (IC300 (F-3),
IC302 (F-3), IC305 (F-3), IC308 (F-2), and
IC310 (F-2) on the CP-364 board) proper?
IC defect or soldering defect
OK
Is cathode to LED properly connected to
GND?
NG
Resistor defect or soldering defect
NG
OK
OK
Is control signal (anode ON :
+
2 V/OFF :
GND) to LED proper?
LED that does not light is defective
2-3-6. Troubleshooting for NV-RAM Test Error
An error is displayed
2-3-7. Troubleshooting for LED Test Error
Only one LED does not light or it is dark
Is the connection between pin 119 of
IC200 (G-1), pin 6 of IC201 (G-1) and pin 6
of IC203 (F-1) on the CP-364 board proper?
Connection defect between IC200, IC201
and IC203
OK
NG
Are R220 (G-1: B side), pin 5 of IC201,
pin 5 of IC203 on the CP-364 board set to
+
5 V? (Measure when an error indication
appears.)
Parts defect of R220 or soldering defect
OK
NG
Is the connection between pin 120 of IC200,
pin 5 of IC201 and pin 5 of IC203 proper?
Connection defect between IC200, IC201
and IC203
OK
NG
IC defect of either IC200, IC201 or IC203
2-3. Troubleshooting
Содержание HKDV-900
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Страница 88: ...Printed in Japan Sony Corporation 2004 9 16 B P Company 2000 HKDV 900 SY J E 9 967 923 03 ...