Sharp LC-32LE510E - Keypad Touchpad Problems

Sharp LC-32LE510E

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78

LC-32LE510

LC-40LE510

26.5. Keypad Touchpad Problems

Problem: Keypad or Touchpad is not working

Check keypad supply and KEYBOARD pin on MB60.

25.5

Table of Contents

Default Chapter2
- Table of Contents2
- Electrical Specifications6
- Specifications6
- Important Service Safety Precaution8
  - End of Life Disposal10
  - Remote Control Buttons11
- Operation Manual11
- Dimensions17
1 Introduction19
- General Block Diagram20
- MB60 Placement of Blocks21
2 Tuner(Tu102)22
- Circuit Descriptions22
- Features of DTOS403LH122X23
- General Description of Samsung DTOS403LH122X23
- Pinning24
3 SAW FILTER - Audio - Epcos K9656M(Z101)25
- Standard25
- Features25
- Pin Configuration25
- Frequency Response26
4 SAW FILTER - Video - Epcos K3958M(Z102)27
- Standard27
- Features27
- Pin Configuration27
- Frequency Response28
5 Audio Amplifier Stage with Azad2102(U163, U164)29
- General Description29
- Features29
- Absolute Ratings30
- Electrical Characteristics30
- Operating Specifications31
- Pinning32
6 Audio Amplifier Stage with Tpa3113(U168)33
- General Description33
- Features33
- Absolute Ratings33
- Electrical Characteristics33
- Operating Specifications34
- Pinning34
7 Power Stage35
- Short CCT Protection Circuit37
- Power Management38
8 Microcontroller - Mstar(U157)40
- General Description40
- General Features40
- MSTAR Block Diagram45
- Reset Circuit45
101 CI Interface46
- Block Diagram46
- CI Interface Power Switch46
10 Usb Interface47
11 Ddr2 Sdram 8M × 4 Banks × 16 Bit (W9751G6Jb) (U154, U155)48
- General Description48
- Features48
- Electrical Characteristics48
- Pinning49
12 Scaler and Lvds Sockets51
- LVDS Sockets Block Diagram51
- Panel Supply Switch Circuit51
13 Nand Flash Memory - Mx25L1005 (U158)53
- General Description53
- Features53
- Absolute Maximum Ratings53
- Pinning53
14 Nand Flash Memory - Nand512Xxa2C (U162)54
- General Description54
- Features54
- Pinning55
15 USB2.0 to Fast Ethernet - ASIX AX88X72A (U171)56
- General Description56
- Features56
- Block Diagram57
- Pinning57
16 Lm1117(U175, U180, U181)58
- General Description58
- Features58
- Applications58
- Absolute Maximum Ratings58
- Pinning58
17 Mp2012 (U176)59
- General Description59
- Features59
- Pinning59
18 Rta8283A (U23, U173)60
- General Description60
- Features60
- Pinning61
19 Mp1583 (U174)62
- General Description62
- Features62
- Pinning62
20 Fdc64263
- General Description63
- Features63
- Pinning63
21 Fdc604P64
- General Description64
- Features64
- Pinning64
22 Connectors65
- Scart (Sc1)65
- Hdmi (Cn707,Cn708)65
- Vga (Cn132)66
23 Service Menu Settings67
- Video Settings68
- Audio Settings68
- Options69
- Tuning Settings70
- Source Settings70
- Diagnostic71
- USB Operations71
24 Software Update72
25 Troubleshooting73
- No Backlight Problem73
- CI Module Problem75
- Led Blinking Problem76
- IR Problem77
- Keypad Touchpad Problems78
- USB Problems79
- No Sound Problem80
- No Sound Problem at Headphone80
- Standby On/Off Problem80
- No Signal Problem81
26 Overal Wiring Board83
- Overall Wiring Diagram83
27 Schematic Diagrams85
- Peripherals Diagram86
- Power Supply Diagram94
28 Printed Wiring Board95
29 Replacement Part List97
30 Cabinet and Mechanical Parts Listing118
- Sharp Corporation122

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