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LCD TV
LT850-M32
FUNAI LT850-M32 User Manual
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SER
VICE MANU
AL
This Service Manual is for the LT850-M32 (A0CF3
PH) model.
For the LT850-M32 (A0CF3PH
) model, the le
tter (A0CF3PH) is printed on
the Serial Number Label on the ba
ck of the unit. Refer to the Serial
Number Label below.
Serial No.
Label
"A0CF3PH"
32
″
COLOR LCD TELEVISION
L
T850-M32
2
Table of Contents
Service Manual
1
Table of Contents
2
Specifications
3
Safety Precautions for LCD TV Circuit
5
Important Safety Precautions
5
Hot Chassis Warning
6
Product Safety Notice
6
Precautions During Servicing
7
Safety Check after Servicing
8
Clearance Distance
8
Ratings for Selected Area
8
Leakage Current Test
8
Pb (Lead) Free Solder
9
Circuit Board Indications
9
How to Remove / Install Flat Pack-IC
9
Standard Notes for Servicing
9
With Soldering Iron
10
With Iron Wire
10
Instructions for Handling Semi- Conductors
11
Installation
11
Ground for Human Body
11
Ground for Workbench
11
Disassembly Method
12
Disassembly Flowchart
12
Cabinet Disassembly Instructions
12
TV Cable Wiring Diagram
16
Test Equipment Required
17
How to Set up the Service Mode
17
Electrical Adjustment Instructions
17
Purity Check Mode
18
VCOM Adjustment
18
White Balance Adjustment
19
How to Initialize the LCD Television
20
Firmware Update Procedure
21
Firmware Renewal Mode
21
The Power Cannot be Turned on
22
The Fuse Blows out
22
When the Output Voltage Fluctuates
22
Troubleshooting
22
INV+16V Is Not Output
23
AL+3.3V Is Not Output
23
P-ON+5V Is Not Output
23
LCD+24V Is Not Output
24
LCD+16V Is Not Output
24
LCD-6.8V Is Not Output
24
Picture Does Not Appear Normally
25
The Key Operation Is Not Functioning
25
No Operation Is Possible from the Remote Control Unit
25
Audio Is Not Outputted Normally. (Audio Input Terminals)
27
Audio Is Not Outputted Normally. (Tuner Input (Digital))
27
System Control Block Diagram
28
Block Diagrams
28
Video Block Diagram
29
Audio Block Diagram
30
Digital Signal Process Block Diagram
31
Inverter Block Diagram
32
Power Supply Block Diagram
33
Standard Notes
34
Schematic Diagrams / Cba and Test Points
34
Voltage Indications on the Schematics Are as Shown below
35
How to Read Converged Lines
35
Test Point Information
35
Power Supply 1 & Power SW Schematic Diagram
36
Power Supply 2 Schematic Diagram
37
Power Supply 3 Schematic Diagram
38
Inverter Schematic Diagram
39
Function & IR Sensor Schematic Diagram
40
Digital Main 1 Schematic Diagram
41
Digital Main 2 Schematic Diagram
42
Digital Main 3 Schematic Diagram
43
Digital Main 4 Schematic Diagram
44
Digital Main 5 Schematic Diagram
45
Digital Main 6 Schematic Diagram
46
Digital Main 7 Schematic Diagram
47
Power Supply CBA Top View
48
Power Supply CBA Bottom View
49
Inverter CBA, Function CBA, IR Sensor CBA & Power SW CBA Top View
50
Inverter CBA, Function CBA, IR Sensor CBA & Power SW CBA Bottom View
51
Waveforms
52
Pin 29 of CN404
53
Pin 22 of CN401
53
Pin 26 of CN404
53
Wiring Diagrams
54
Digital Main CBA Unit
54
Exploded Views
55
Cabinet
55
Packing
56
Mechanical Parts List
57
Power Supply Cba
58
Electrical Parts List
58
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FUNAI LT850-M32 Specifications
General
Display Type
LCD
USB Ports
1
Refresh Rate
60 Hz
Aspect Ratio
16:9
Screen Size
32 inches
Resolution
1366 x 768
Inputs
Component, Composite
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