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LEDs do not light in units of blocks or they are dark
(1) Black-colored LEDs in the following figure do not light properly.
POWER
Is the harness between CN400 (D-3) on the
CP-364 and CN1 (C-1 : B side) on the CP-365
boards properly connected?
OK
Is WR signal of control IC (IC305 (F-3) on
the CP-364 board) proper?
OK
Is output signal (ON : +3 V to +4 V/OFF :
GND) of control ICs (IQI to 2Q8 on the
CP-364 board) proper?
OK
Is power supply (anode : +2 V) to LED
proper?
(2) Black-colored LEDs in the following figure do not light properly.
POWER
Is the harness between CN400 (D-3) on the
CP-364 and CN1 (C-1 : B side) on the
CP-365 boards properly connected?
OK
Is WR signal of control IC (IC302 (F-3) on
the CP-364 board) proper?
OK
Is output signal (ON : +3 V to +4 V/OFF :
GND) of control ICs (1Q1 to 2Q8 of IC302
on the CP-364 board) proper?
OK
Is power supply (anode : +2 V) to LED
proper?
HKDV-900
MASTER
IMAGE ENHANCER
STORE
7SEG LED
HD
D1
D2
INPUT
LOAD
UNITY
_
+
CONTROL
OUTPUT
CANCEL
CROP
LETTER
SQUEEZE
SELECT
BOX
NG
NG
NG
NG
MASTER
IMAGE ENHANCER
STORE
7SEG LED
HD
D1
D2
INPUT
LOAD
UNITY
_
+
CONTROL
OUTPUT
LETTER
SQUEEZE
CANCEL
CROP
SELECT
BOX
NG
NG
NG
NG
Y
PB
PR
SETUP SYNC PHASE
FINE
UNITY
UNITY
UNITY
UNITY
PRESET
PRESET
Connect harness connectors properly and
recheck them
Connection defect between IC200 (G-1) and
IC305 on the CP-364 board
IC305 defect on the CP-364 board
Defect of resistor block (on CP-365 board)
Y
PB
PR
SETUP SYNC PHASE
FINE
UNITY
UNITY
UNITY
UNITY
PRESET
PRESET
Connect harness connectors properly and
recheck them
Connection defect between IC200 (G-1) and
IC302 on the CP-364 board
IC302 defect on the CP-364 board
Defect of resistor block (on CP-365 board)
2-3. Troubleshooting
_
PRESET
_
PRESET
2-15 (E)
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Table of Contents
Troubleshooting
