Troubleshooting For Rs-422A Test Error - Sony HKDV-900 Maintenance Manual

2-3. Troubleshooting

2-3-11. Troubleshooting for RS-422A Test Error

Error display
Are connector tools for test connected?
OK
Are pin 12 of IC102 (J-1 : B Side) on the
CP-364 board and pin 12 of
IC101 (J-1 : B side) low?
OK
Are output signals of pin 48, pin 49, pin
50 and pin 51 of IC200 on the CP-365
board proper?
OK
Are output signals of pin 2, pin 6, pin
10 and pin 14 of IC102 on the CP-364
board proper?
OK
Are output signals of pin 3, pin 5, pin 11
and pin 13 of IC102 on the CP-364 board
proper?
OK
Are output signals of pin 3, pin 13, pin 5 and
pin 11 of IC101 on the CP-364 board proper?
OK
Are input signals of pin 53, pin 54, pin 55 and
pin 56 of IC200 on the CP-364 board proper?
OK
Is output signal of pin 34 of IC200 on
the CP-364 board proper?
It takes much time (three seconds or more) to display the pass
Is clock frequency (pin 79 of IC100 (H-3)
on the CP-364 board : 6.144 MHz) proper?
2-22 (E)
NG
Connection defect to IC200 (G-1) on the
CP-364 board
NG
IC200 defect on the CP-364 board or
soldering defect
NG
IC102 defect or soldering defect
(IC102 : pin 1, pin 7, pin 9, pin 15)
NG
IC102 defect or soldering defect
(IC102 : pin 1, pin 7, pin 9, pin 15)
NG
IC101 defect on the CP-364 board or
soldering defect
NG
Short or bridge on the line between IC101
and IC200. IC101 defect or soldering defect
NG
Short or bridge on the line between CPU
and IC200. IC200 defect or soldering defect
HKDV-900