Pwb-Main Test Point Locations And Description - Mitsubishi Electric LT-2220 Service Manual

MODELS: LT-2220 / LT-2240 / LT-3020 / LT-3040 / LT-3050
(2) PWB-MAIN
Test Point
1 S5V Pin12 of J303
2 S3.3V Pin13 of J303
3 D3.3V Pin7 of J190
4 A5V Pin1 of J190
5 A3.3V Pin5 of J190
6 D2.5V Pin8 of J190
7 AD3.3V Pin6 of J190
8 D1.9V L400
9 Digital_G7 14 of IC4A1
10 QHS R4H6
-27 of IC4A1
11 QVS R4H5
-28 of IC4A1
12 QCLK R4H3
-31 of IC4A1
13 QDE R4H4
-30 of IC4A1
14 A9V 10 of J190
15 30V Pin7 of IC180
16 A1.5V, Pin3 of IC600
D1.5V
17 TU_SDA Pin31 of IC300
18 TU_SCL Pin28 of IC300
19 S3.3V(RMC) Pin1 of J301
20 RMC Pin2 of J301
21 KEY1 Pin4 of J301
22 KEY2 Pin5 of J301
23 V_OUT Pin2 of J110
24 SY_OUT Pin4 of J110
Location
5Vdc(always on ).
Power supply voltage for MCU, etc.
3.3Vdc(always on ).
Power supply voltage for MCU, etc.
3.3Vdc.
Power supply for IC300, IC4A0, IC4A1
etc.
5Vdc.
Power supply for IC204, IC201 etc.
3.3Vdc.
Power supply for IC203, etc.
2.5Vdc.
Power supply for IC500.
3.3Vdc.
Power supply for IC2A3, IC205, IC2J1,
etc.
1.9Vdc.
Power supply for IC500.
3.3Vdc.
MSB of green digital video signal to
LCD panel.
Horizontal sync signal to LCD panel
Vertical sync signal to LCD panel
Clock signal to LCD panel
Data_Enable signal to LCD panel
9Vdc.
Power supply for IC100.
30Vdc.
Power supply for TU1A0.
1.5Vdc.
Power supply for IC601.
Serial port data I/O for TU1A0.
Serial port data clock forTU1A0.
3.3Vdc(always on ).
Power supply for IR receiver and front
switches, etc.
Data signal from IR receiver.
This data is sent to MCU.
Data signal from front switch.
This data is sent to MCU.
Data signal from front switch.
This data is sent to MCU.
Analog video signal from VIDEO 1&2
inputs. (Composite video)
Analog video signal from VIDEO 1&2
inputs. (S-video)
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Description Note