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The display state of LEDs is no change after repeating light on and off
or the 7SEG LEDs counter display is not proper
Are harnesses connected to CN400 (D-3)
and CN401 (A-3) on the CP-364 board
and CN1 (C-1 : B side) and
CN2 (A-1 : B side) on the CP-365 board
properly connected?
OK
Are output of IC300 (F-3), IC302 (F-3),
IC305 (F-3), IC308 (F-2), and IC310 (F-2)
on the CP-364 board proper?
OK
LED defect on the CP-365 board
or soldering defect
Countdown display of the 7SEG LED is too quick or too slow
Is oscillating clock (12.288 MHz) of
crystal oscillator proper?
The normal (main) program becomes active
Is switch S100-1 (J-3) on the CP-364
board set to ON?
OK
Is pin 5 of CPU (IC100 (H-3) on the
CPU-364 board) low level?
OK
Is switch S101 (J-3) on the CP-364 board
is set to the factory settings (all OFF)?
OK
Switch S101 defect, IC defect of
IC105 (J-2) and IC100 (H-3) on the
CP-364 board, or soldering defect
HKDV-900
NG
Connect harnesses properly and recheck them
NG
IC300, IC302, IC305, IC308, IC310 defect
on the CP-364 board or soldering defect
NG
Set switch S100-1 to ON and test it again
NG
Switch S100 defect or soldering defect
NG
Set the S101 to the factory settings (all OFF)
and turn on the main power
2-3. Troubleshooting
2-11 (E)
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Table of Contents
Troubleshooting
