Sony HKDV-900, Руководство по обслуживанию

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