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

MODELS: LT-2220 / LT-2240 / LT-3020 / LT-3040 / LT-3050
TEST POINT LOCATIONS AND DESCRIPTIONS
Test points, locations and descriptions are shown below.
(1) PWB-SET (SUB)
Test Point
1 Pin1 of J800
2 F800
3 INV-SW
4 BRIGHT
5 24V
6 8.5V
7 IN_24V
8 Psave1
9 A8V
10 AMPVCC
11 SAMPVCC
12 Psave2
13 Psave3
14 MPX
15 SW_L
16 SW_R
17 5V_SDA
18 5V_SCL
19 MPX_RST
20 F880
21 F870
Location
J801(Fuse-clip) 20Vdc from AC-ADAPTOR
J802(Fuse-clip) 20Vdc behind the fuse F800
Pin12 of J821 Used to control inverter ON/OFF. (0V :
OFF , 5Vdc : ON)
Pin14 of J821 Used for brightness control of
inverter. (PWM control)
(Max : 5Vdc, Min : thin pulse)
Pin4, 6 of J810 24Vdc from Power-unit.
Pin2 of J810 8.5Vdc from Power-unit.
Pin8 of J810 3.3Vdc.
Used for ON/OFF control of the power
supply from the POWER-UNIT.
Pin5 of J712 ON/OFF control signal of D3.3V, A3.3A.
(0V : OFF , 3.3Vdc : ON)
(+) of C733 8Vdc.
Used to supply power to IC710.
Pin1 of IC711 7~9Vdc.
Used to supply power to IC711.
Pin1 of IC712 8~12Vdc.
Used to supply power to IC712.
Pin6 of J712 ON/OFF control signal of A9V, A8V
A5A. (0V : OFF , 3.3Vdc : ON)
Pin7 of J712 ON/OFF control signal of AMPVCC,
SAMPVCC. (0V : OFF , 3.3Vdc : ON)
Pin8 of J710 Analog video signal from TV input.
Voltage level is 1.0Vp-p (Typical)
Pin10 of J710 Audio L signal for PC or Monitorlink or
Component input.
Pin12 of J710 Audio R signal for PC or Monitorlink or
Component input.
5 of J711 Serial port data I/O for IC of 5V power
supply.
6 of J711 Serial port data clock for IC of 5V
power supply.
Pin10 of J711 Reset signal of IC710.
(0V : reset)
F880 7~9Vdc.
Power supply fuse for IC711.
F870 8~12Vdc.
Power supply fuse for IC712.
Description Note
22inches only
22inches only
30inches only
30inches only
30inches only