LC-32D12E - Sharp TV Service Manual (repair manual)

1.

INTRODUCTION...................................................................................................................... 4
1.1.

General Block Diagram.................................................................................................. 5

1.2.

MB61 Placement of Blocks............................................................................................ 6

1.

TUNER(TU102)......................................................................................................................... 7
1.1.

General description of Samsung DTOS403LH121B: .................................................... 7

1.2.

Features of DTOS403LH121B: ..................................................................................... 7

1.3.

Pinning: .......................................................................................................................... 8

2.

SAW FILTER – Audio – Epcos K9656M(Z101) ...................................................................... 9
2.1.

Standart........................................................................................................................... 9

2.2.

Features .......................................................................................................................... 9

2.3.

Pin configuration ............................................................................................................ 9

2.4.

Frequency response ........................................................................................................ 9

3.

SAW FILTER – Video – Epcos K3958M(Z102) .................................................................... 10
3.1.

Standart......................................................................................................................... 10

3.2.

Features ........................................................................................................................ 10

3.3.

Frequency response ...................................................................................................... 11

4.

AUDIO AMPLIFIER STAGE WITH MAX9736 ................................................................... 12
4.1.

General Description...................................................................................................... 12

4.2.

Features ........................................................................................................................ 12

4.3.

Absolute Ratings .......................................................................................................... 13

4.3.1.

Electrical Characteristics.......................................................................................... 13

4.4.

Pinning ......................................................................................................................... 16

5.

POWER STAGE ...................................................................................................................... 17

6.

MICROCONTROLLER – MSTAR(U157) ............................................................................. 19

MSD9WB7GX-LF-2.................................................................................................................... 19

6.1.

MSTAR Block Diagram............................................................................................... 22

6.2.

Reset Circuit................................................................................................................. 23

7.

CI INTERFACE....................................................................................................................... 23
7.1

Block Diagram ............................................................................................................. 23

7.1

CI Interface Power Switch ........................................................................................... 23

8.

USB INTERFACE ................................................................................................................... 24

9.

DDR2 SDRAM 8M × 4 BANKS × 16 BIT (W9751G6JB) (U154, U155) ............................. 24
9.1.

General Description...................................................................................................... 24

9.2.

Features ........................................................................................................................ 25

9.3.

Electrical Characteristics.............................................................................................. 25

9.4.

Pinning ......................................................................................................................... 26

Headphone Amplifier-TDA1308 ................................................................................................. 27
Demodulators ............................................................................................................................... 28

MSB1210 ................................................................................................................................. 28
MSB1222 ................................................................................................................................. 30
CXD2820D............................................................................................................................... 31

10.

SERVICE MENU SETTINGS............................................................................................. 33

10.1. Video Settings .............................................................................................................. 34
10.2. Audio Settings .............................................................................................................. 35
10.3. Options ......................................................................................................................... 36
10.4. Tuning Settings ............................................................................................................ 38
10.5. Source Settings............................................................................................................. 39
10.6. Diagnostic..................................................................................................................... 40

10.7.

 

USB Operations ............................................................................................................ 40

 

11.

 

SOFTWARE UPDATE ........................................................................................................ 41

 

12.

 

TROUBLESHOOTING ....................................................................................................... 42

 

12.1.

 

No Backlight Problem .................................................................................................. 42

 

12.2.

 

CI Module Problem ...................................................................................................... 43

 

12.3.

 

Led Blinking Problem .................................................................................................. 45

 

12.4.

 

IR Problem ................................................................................................................... 46

 

12.5.

 

Keypad Touchpad Problems ........................................................................................ 47

 

12.6.

 

USB Problems .............................................................................................................. 48

 

12.7.

 

No Sound Problem ....................................................................................................... 49

 

12.8.

 

No Sound Problem at Headphone ................................................................................ 49

 

12.9.

 

Standby On/Off Problem .............................................................................................. 50

 

DVD Problems ......................................................................................................................... 50

 

12.10.

 

No Signal Problem ................................................................................................... 51

 

13. 

PART LIST………………………………………………………………………………...52 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

17MB61 mainboard is driven by MSD9WB7GX-LF-2. This IC is capable of handling Video 
and  audio  processing,  Scaling-Display  processing,  3D  comb  filter,  OSD  and  text 
processing, LVDS transmitting, channel and MPEG2/4 decoding.

TV supports  PAL, SECAM, NTSC colour standards and multiple transmission standards 
as B/G, D/K, I/I’, and L/L’ including German and NICAM stereo. Also DVB T, DVB-C are 
supported external demodulators.

Sound system output is supplying max. 2x8W (10%THD) for stereo 8Ω speakers. 

Supported peripherals are:

1 RF input VHF I, VHF III, UHF @ 75Ohm(Common)
1 Side AV (CVBS, R/L_Audio)
2 SCART socket(Common)
1 YPbPr (Common)
1 PC input(Common)
4 HDMI 1.3 input(2 HDMI inputs are common, 4 inputs are optional)
1 S/PDIF output(Common)
1 Headphone(Common)
1 Common interface(Common)
2 USB(Common) 
1 DVD(Optional)
1 On-board Keypad(Optional)
1 External Keypad(Optional)
1 External TouchPad(Optional)