21
DVM-1845/745
Yes
No
FLOW CHART NO.13
The key operation is not functioning.
Are the contact point and the installation state of the
key switches (SW2101, 2102, 2203 - 2215) normal?
Is the control voltage normally supplied to pins(40,
41, 42) of IC3001?
Check the switches (SW2101, 2102, 2203 - 2215)
and their periphery, and service it if defective.
No
Reinstall the switches (SW2101, 2102, 2203 - 2215)
correctly or replace the poor switch.
Replace IC3001.
Yes
Yes
Yes
No
No
FLOW CHART NO.12
The fluorescent display tube does not light up.
Is 3.3V voltage supplied to Pin(13) and
Pin(43) of IC2001?
Is the voltage of approximately -19V
supplied to Pin(30) of IC2001?
Replace the fluorescent display tube or IC2001.
Check the P-ON+3.3V line and service it if defective.
Check the -FL line and service it if defective.
42pin
41pin
40pin
KEY-1
KEY-2
KEY-3
0V
SW2101
0.7V
APPROX.
APPROX.
1.3V
APPROX.
2.0V
APPROX.
2.7V
APPROX.
3.3V
APPROX.
POWER
SW2206
SKIP DOWN
SW2211
DISC-3
SW2102
HDMI
SW2207
SKIP UP
SW2212
DISC-4
SW2203
PLAY
SW2204
PAUSE
SW2209
DISC-5
SW2214
DISC-1
SW2208
DISC CHANGE
SW2213
DISC-2
IC3001
Terminal Voltage of Pins (40 - 42) on IC3001
VOLTAGE
SW2205
STOP
SW2210
SKIP
SW2215
OPEN/CLOSE
(KEY OFF)
(KEY OFF)
(KEY OFF)
Summary of Contents for DVM-1845/745
Page 13: ...13 DVM 1845 745 S 15 20 PCB Holder 19 DVD Main CBA Unit Fig D10...
Page 36: ...36 DVM 1845 745 DVD Main 2 4 Schematic Diagram...
Page 37: ...37 DVM 1845 745 DVD Main 3 4 Schematic Diagram...
Page 38: ...38 DVM 1845 745 DVD Main 4 4 Schematic Diagram...
Page 40: ...40 DVM 1845 745 AV 2 2 Schematic Diagram...
Page 41: ...41 DVM 1845 745 Changer 1 2 Function Power Switch Switch Schematic Diagram...
Page 43: ...43 DVM 1845 745 Relay Sensor Mecha Pick Up Unit Schematic Diagram...
Page 57: ...57 DVM 1845 745 Packing X10 X22 X21 X5 X2 X4 S2 S2 S3 S3 S1 A30 A30 A22 S10 X1 S4 Unit...
