Olevia LT27HV, LT30HV Service Manual

Service Manual

For LCD TV

(2004.2)

Table of Contents

…

.

…

1 Introduction……..…………..……………………………………… P3

1.0 Preface……………………………………………………………………………P3

1.1 Caution……………………………………...……………………………………P3

1.2 Warning…………………………………………………………………………. P3

2 System Block Diagram……………………………………………..

2.0 System Block Diagram (ME)…………………………………………………

2.1 System Block Diagram (EE)……………………………………………………

2.2 Connector Connection Diagram……………………………………………….

2.3 Spare Parts List…………………………………………………………………

2.3.1 EE parts list……………………………………………………………………...

2.3.2 ME parts list……………………………………………………………………..

2.4 Connector Pin Definition……………………………………………………….

3 Schematic……………………………………………………………

3.0 Tuner Board……………..………………………………………………………

3.1 Graph Port Tuner……………………………………………………………….

3.2 Interface Board…………..……………………………………………………

3.3 IR Board……..…………..………………………………………………………

3.4 Keypad Board…….……..………………………………………………………

3.5 System Board-1 Graph Interface………………………………………………

3.6 System Board-2 Power Management….………………………………………

P5

P5
P6
P7
P8
P8
P14
P24

P40

P40
P41
P42
P43
P44
P45
P46

3.7 System Board-3 PW181 Power Management….………………………………

3.8 System Board-4 DVI Receiver………………….………………………………

3.9 System Board-5 ADC………………………..….………………………………

3.10 System Board-6 A/V Switch…………………….………………………………

3.11 System Board-7 3D Comb Filter…………….….………………………………

3.12 System Board-8 Video Decoder (V Port)……….………………………………

3.13 System Board-9 Video Decoder (G Port)……….………………………………

3.14 System Board-10 Deinterlace…………………...………………………………

3.15 System Board-11 SDRAM……………………….………………………………

3.16 System Board-12 Image Processor………….….………………………………

3.17 System Board-13 Flash Memory…………….….………………………………

3.18 System Board-14 Miscellaneous………………...………………………………

3.19 System Board-15 LVDS………………………….………………………………

3.20 System Board-16 Audio DSP…………………….………………………………

3.21 System Board-17 Class D Audio PA…………….………………………………

1

P47
P48
P49
P50
P51
P52
P53
P54
P55
P56
P57
P58
P59
P60
P61

4 TroubleShooting…………………………………………………….

P62

5 Firmware upgrade applications……………………………………
6 Standard Operation Procedure……………………………………

6.0 Module assembly process………………………………………………………

6.1 Module repair process………………………………………………………….

6.1.1 Tuner & Interface module……………………………………………………...

6.1.2 Stand module……………………………..……………………………………..

6.1.3 Back Cover & Speaker module……………………………..……...…………..

6.1.4 PCBA module………………………………………………..……...…………..

6.1.5 Power module………………………………………………..……...…………..

6.1.6 LCD module………………………...………………………..……...…………..

P68
P69

P69
P72
P72
P73
P74
P75
P76
P77

2

1. Introduction

1.0 Preface

This service manual aims directly at the module of LCD TV. It offers the simple
repair which emphasizes on technique explanation and production troubles to
remove for the engineers and technicians who have electronic background.

1.1 Caution

Be sure to read those manual before servicing. To assure safety from fire, electric
shock, injury, harmful radiation and materials, various measures are provided in
this Prokia LCD TV. Be sure to read cautionary items described in the manual to
maintain safety before servicing.

1.2 Warning

1. Remember to unplug the AC cord from the AC outlet before cleaning the
product. And do not use liquid cleaners or aerosol cleaners to clean the
display.

2. Do not place the product on an unstable place. It can cause the product to fall,
resulting in serious personal injuries as well as damage to the product.

3. In case the product needs replacement parts, make sure that the service
person uses replacement parts specified by the manufacturer, or those with
the same characteristics and performance as the original parts. Use of
unauthorized parts can result in fire, electric shock and/or other danger.

4. Do not overload AC outlets or extension cords. It can cause fire or electric
shock.

5. The AC cords must be routed properly to prevent people from stepping on
them or objects from resting on them. Check the cords at the plugs and
product.

6. Do not hit the panel. Be careful to prevent from getting hurt by broken glass
pieces in case the panel breaks.

7. Keep the product away from heat sources such as radiators, heaters, stoves
and other heat-generating products.

8. Do not place the display near water. Like bathtub, washbasin, kitchen sink
and laundry tub, swimming pool and in a wet basement.

3

2. System Block Diagram

2.0 System Block Diagram (ME)

5

2.1 System Block Diagram (EE)

6

2.2 Connector Connection Diagram

7

2.3 Spare Parts List

2.3.1 EE parts list

1. System Board for 27inch & 30inch

P/N: P061P3112011 for 27〞 P061P3112010 for 30〞

2. P311 Interface Module Assy

P/N: P70403820000

8

3. P311 Tuner Module Assy

P/N: P70403830000

4. PCBA Keypad

P/N: P061P3117010

9

5. IR board

P/N: P061P3118010

6. Power Supply

P/N: P16000100000

10

7. LCD Panel

P/N: P49000620000 for 27〞 P49000610000 for 30〞

8. System to Panel

P/N: P10W53000001

11

9. System to Speaker

P/N: P10W50600001

10. System to Keypad

P/N: P10W51500002

12

11. Power to Inverter

P/N: P10W62200001

12. System to Power

P/N: P10W62600001

13

2.3.2 ME parts list

1. AV Cover Module Assy

P/N: P76000800000

2. Interface Cover

P/N: P60002040000

14

3. Conn fix Cover Module Assy

P/N: P76000800000

4. Foot Base Bottom

P/N: P60001981000

15

5. Foot Base Up

P/N: P60001980000

6. Al V ertical Support

P/N: P21001320000

16

7. Foot Base Metal

P/N: P21001300000

8. Plastic Foot (GL-6)

P/N: P60001880000

17

9. Keypad Assembly LCD TV

P/N: P76000790000

10. Speaker Module Assy

P/N: P76000750000

18

11. Speaker Foot Module Assy

P/N: P76000760000

12. Power Shielding Up

P/N: P21001360000

19

13. PCB-Support

P/N: P21001390000

14. PCB Support Metal

P/N: P21001380000 for 27〞 P21001390000 for 30〞

20

15. System PCB Shielding

P/N: P21001370000

16. Back Cover

P/N: P60001890000

21

17. P311 27-Front Cover Assy

P/N: P70403850000

18. P311 30-Front Cover Assy

P/N: P70403860000

22

19. Remote Control

P/N: P16000410000

23

2.4 Connector Pin Definition

SYSTEM BOARD

Function: VGA signal port
Connector type:
Specification: CNNT-HD D Sub-H-F-3Row-15pin-Dip-BLU

Pin Definition

Pin No. Pin Name I/O Description

1 VGAR I 75 ohm termination, 0.7Vp-p red signal
2 VGAG I 75 ohm termination, 0.7Vp-p green signal
3 VGAB I 75 ohm termination, 0.7Vp-p blue signal
4 GND - GND ­5 NC - No connection
6 GND - GND
7 GND - GND
8 GND - GND

9 VGA5V I VCC 5V IN
10 GND - GND
11 GND - ­12 VGASDA I/O I2C data bus for Reading DDC data
13 VGA_HS I Horizontal Frequency
14 VGA_VS I Vertical Frequency
15 VGASCL I I2C clock bus for Reading DDC data

Function: DVI signal port
Connector type:
Specification: CNNT-DVI-H-29PIN-1.9mm-1.5A-WHITE-dip

Pin Definition

Pin No. Pin Name I/O Description

1 RX2m I TMDS LVDS input signal

2 RX2p I TMDS LVDS input signal

3 GND - GND

4 NC - No connection

5 NC - No connection

6 DDC_CLK I I2C clock bus for Reading DDC data

7 DDC_DATA I/O I2C data bus for Reading DDC data

24

8 NC - No connection

9 RX1m I TMDS LVDS input signal
10 RX1p I TMDS LVDS input signal
11 GND - GND
12 NC - No connection
13 NC - No connection
14 GDC5V VCC 5V
15 GND GND
16 HOTPLG VCC 5V
17 RX0m TMDS LVDS input signal
18 RX0p TMDS LVDS input signal
19 GND GND
20 NC - No connection
21 NC - No connection
22 GND GND
23 RXCp TMDS LVDS input clock
24 RXCm TMDS LVDS input clock
25 NC - No connection
26 NC - No connection
27 NC - No connection
28 NC - No connection
29 AGND - GND
30 AGND - GND

Function: PC Audio In
Connector type:
Specification: CNNT-EAR Phone Jack-H-F-5pin-3.6ψ-Dip

Pin Definition

Pin No. Pin Name I/O Description

1 AUD_R I Audio In_R

2 GND - GND

3 GND - GND

4 AUD_L I Audio In_L

5 GND - GND

Function: RS-232 port

25

Connector type:
Specification: CNNT-Mini Din-H-F-８pin-12ψ-Dip

Pin Definition

Pin No. Pin Name I/O Description

1 NC - No connection

2 NC - No connection

3 GND - GND

4 NC - No connection

5 NC - No connection

6 NC - No connection

7 PC_TXD I/O RS-232 protocl

8 PC_RXD I/O RS-232 protocl

9 GND - GND
10 GND - GND
11 GND - GND

Function: Audio Out
Connector type: Push Terminal
Specification: CNNT-PUSH TERMINAL-F DIP RIGHT ANGLE-4 PIN-5mm

Pin Definition

Pin No. Pin Name I/O Description

1 Speaker/PR O Audio Out_R

2 Speaker/PL O Audio Out_L

3 GND - GND

4 GND - GND

Function: Interface In
Connector type:
Specification: CNNT-CENTRONIC DIP RIGHT ANGLE-M-50 pin-2.16 mm

Pin Definition

Pin No. Pin Name I/O Description

1 IF_EN I Connection test
2 AV9_MUX

26

3 V5_IF VCC 5V
4 GND - GND
5 GND - GND
6 OCVBS_SC1 O AV Out1
7 RIN_SC1 I SCART RGB_R IN
8 GIN_SC1 I SCART RGB_G IN

9 BIN_SC1 I SCART RGB_B IN
10 GND - GND
11 HD_Y I HDTV_Y IN
12 HD_PB I HDTV_PB IN
13 HD_PR I HDTV_PR IN
14 GND - GND
15 GND - GND
16 ALO_SC2 O Audio Out_L SCART2
17 ARO_SC2 O Audio Out_R SCART2
18 ALO_SC1 O Audio Out_L SCART1
19 ARO_SC1 O Audio Out_R SCART1
20 GND - GND
21 YCBCR_L I Audio In_L YCBCR
22 YCBCR_R I Audio In_R YCBCR
23 HDTV_L I Audio In_L HDTV
24 HDTV_R I Audio In_R HDTV
25 GND GND
26 GND GND
27 CVBS_SC1 I AV IN
28 IF_YCVBS I S-VIDEO_Y IN
29 IF_C I S-VIDEO_C IN
30 GND - GND
31 OCVBS_SC2 O AV Out2
32 IF_VCR I YCBCR_CR IN
33 IF_VCB I YCBCR_CB IN
34 IF_VY I YCBCR_Y IN
35 GND - GND
36 SCL_5V I I2C clock bus for selecting scart connectors
37 SDA_5V I/O I2C data bus for selecting scart connectors
38 TPA_MODE O EARPHONE TEST
39 GND - GND
40 EPOUT_L O EARPHONE Out_L

27

41 EPOUT_R O EARPHONE Out_R
42 AMP_WF O Sub_Woofer Out
43 LINE_L O LINE Out_L
44 LINE_R O LINE Out_R
45 GND - GND
46 SAL_SC2 I AUDIO IN_L (S-VIDEO)
47 SAR_SC2 I AUDIO IN_R (S-VIDEO)
48 CVBSAL_SC1 I AUDIO IN_L (AV)
49 CVBSAR_SC1 I AUDIO IN_L (AV)
50 GND - GND

Function: Tuner In
Connector type: FX2-40P-1.27DS
Specification: CNNT-Dip Right Angle-M-40PIN-1.27mm-0.5A

Pin Definition

Pin No. Pin Name I/O Description

1 GND - GND

2 T1_RED I CC ,V-Chip RED In

3 T1_GRE I CC ,V-Chip GREEN In

4 T1_BLU I CC ,V-Chip BLUE In

5 GND - GND

6 VPC1_T1HS O CC ,V-Chip H Sync Out

7 VPC1_T1VS O CC ,V-Chip V Sync Out

8 GND - GND

9 T1_SIF I Tuner1 Audio In
10 T2_SIF I Tuner2 Audio In

11 GND - GND
12 T2_RED I CC ,V-Chip RED In
13 T2_GRE I CC ,V-Chip GREEN In
14 T2_BLU I CC ,V-Chip BLUE In
15 GND - GND
16 VPC2_T2HS O CC ,V-Chip H Sync Out
17 VPC2_T2VS O CC ,V-Chip V Sync Out
18 VPC2_T2CV O AV2 Feedback signal
19 VCC O DC Power 5V
20 TUNER_EN I Tuner Test Signal

28

21 GND - GND
22 T1_CVBS I AV1 In
23 T1_FB I CC,V-Chip OSD Timing Signal In
24 GND - GND
25 VPC1_T1CV O AV1 Feedback signal
26 GND - GND
27 VVINT I CC,V-Chip Interrupt In
28 RESETn O TT1 Reset Signal
29 GVINT I CC,V-Chip Interrupt In
30 GND - GND
31 VSCL O I2C Clock bus for V-Port
32 VSDA I/O I2C Data bus for V-Port
33 SCL O I2C Clock bus for G-Port
34 SDA I/O I2C Data bus for V-Port
35 GND - GND
36 T2_FB I CC,V-Chip OSD Timing Signal In
37 T2_CVBS I AV2 In
38 GND - GND
39 VCC O DC Power 5V
40 GND - GND

Function: LVDS output port
Connector type: LVDS-30pin
Specification: CNNT-LVDS-F SMD STRAIGHT-V-30 PIN-1.25mm

Pin Definition

Pin No. Pin Name I/O Description

1
2 NC - No connection
3 NC - No connection
4 NC - No connection

NC - No connection

5 NC - No connection
6 NC - No connection
7 NC - No connection
8 GND - GND
9 TXE3p O Positive LVDS differential data output. Ch 3

10 TXE3m O Negative LVDS differential data output. Ch 3

29

11 TXECKp O Positive LVDS differential clock output.

12 TXECKm O Negative LVDS differential clock output

13 GND - GND

14 GND - GND

15 TXE2p O Positive LVDS differential data output. Ch 2

16 TXE2m O Negative LVDS differential data output. Ch 2

17 TXE1p O Positive LVDS differential data output. Ch 1

18 TXE1m O Negative LVDS differential data output. Ch 1

19 TXE0p O Positive LVDS differential data output. Ch 0

20 TXE0m O Negative LVDS differential data output. Ch 0

21 GND - GND

22 GND - GND

23 GND - GND

24 GND - GND

25 GND - GND

26 VCC - +5.0V power supply

27 VCC - +5.0V power supply

28 VCC - +5.0V power supply

29 VCC - +5.0V power supply

30 VCC - +5.0V power supply

Function: Power Input 1
Connector type:
Specification: M15-I25002CNNT M 15PIN pitch 2.5mm DIP straight

Pin Definition

Pin No. Pin Name I/O Description

1 V7_SYS I DC Power 7V IN
2 V5_SYS I DC Power 5V IN
3 V5_SYS I DC Power 5V IN
4 V5_SYS I DC Power 5V IN
5 V5_SYS I DC Power 5V IN
6 GND - GND
7 GND - GND
8 GND - GND
9 GND - GND

10 V7_SYS I DC Power 7V IN

30

11 GND - GND
12 LCD_INVON O Inverter On/Off
13 GND - GND
14 BRI O Backlight Brightness Control
15 GND - GND

Function: Power Input 2
Connector type:
Specification: M11-I25002CNNT M 11PIN pitch 2.5mm DIP straight

Pin Definition

Pin No. Pin Name I/O Description

1 V14_SYS I DC Power 14V IN
2 V14_SYS I DC Power 14V IN
3 V14_SYS I DC Power 14V IN
4 GND - GND
5 GND - GND
6 GND - GND
7 V12_SYS I DC Power 12V IN
8 GND - GND

9 V12_SYS I DC Power 12V IN
10 GND - GND
11 GND - GND

Function: Keypad In
Connector type:
Specification: CNNT F 15PIN DN-V 1.25mm SIM15

Pin Definition

Pin No. Pin Name I/O Description

1 5V_KEY1 I- DC +5V power input

2 GND GND

3 KEY_X1 O Signal sent from System to Keypad 1

4 KEY_X2 O Signal sent from System to Keypad 2

5 KEY_X3 O Signal sent from System to Keypad 3

6 KEY_Y1 I Signal sent from Keypad to System 1

31

7 KEY_Y2 I Signal sent from Keypad to System 2

8 KEY_Y3 I Signal sent from Keypad to System 3

9 GND - GND
10 IRDATA1 I Signal sent from IR to Keypad
11 GND - GND
12 LED11 O Signal for LED 1
13 LED22 O Signal for LED 2
14 LED33 O Signal for LED 3
15 LED44 O Signal for LED 4

INTERFACE BOARD

Function: Interface Out Port
Connector type:
Specification: NNT-CENTRONIC DIP RIGHT ANGLE-M-50 pin-2.16 mm

Pin Definition

Pin No. Pin Name I/O Description

1 GND GND
2 NC - No connection
3 NC - No connection
4 GND - GND
5 GND - GND
6 NC - No connection
7 NC - No connection
8 NC - No connection

9 NC - No connection
10 GND - GND
11 YPbPr_ Pr O YPbPr_ Pr out
12 YPbPr _Pb O YPbPr _Pb out
13 YPbPr _ Y O YPbPr _ Y out
14 GND - GND
15 GND - GND
16 NC - No connection
17 NC - No connection
18 NC - No connection
19 NC - No connection
20 GND - GND

32

21 AL2_YCbCr O Audio out_L YCBCR
22 AR2_YCbCr O Audio out_R YCBCR
23 AL1_ YPbPr O Audio out _L YPbPr
24 AR1_ YPbPr O Audio out _R YPbPr
25 GND GND
26 GND GND
27 CVBS_SC1 O AV out
28 YCVBS_SC2 O S-VIDEO_Y out
29 CIN_SC2 O S-VIDEO_C out
30 GND - GND
31 NC - No connection
32 YCBCR_CR O YCBCR_CR out
33 YCBCR_CB O YCBCR_CB out
34 YCBCR_Y O YCBCR_Y out
35 GND - GND
36 NC - No connection
37 NC - No connection
38 TPA_MODE I EARPHONE TEST
39 GND - GND
40 EAR_LOUT I EARPHONE Out_L
41 EAR_ROUT I EARPHONE Out_R
42 AMP_WFOUT I Sub_Woofer Out
43 LINE_LOUT I LINE Out_L
44 LINE_ROUT I LINE Out_R
45 GND - GND
46 SL_SC2 O AUDIO out_L (S-VIDEO)
47 SR_SC2 O AUDIO out _R (S-VIDEO)
48 CVBSAL_SC1 O AUDIO out _L (AV)
49 CVBSAR_SC1 O AUDIO out _R (AV)
50 GND - GND

Function: YPbPr & YcbCr Input Port
Connector type: RCA
Specification: CNNT-RCA*6Green Blue Red /Green Blue Red-F DIP RIGHT ANGLE 8.3ψ-9PIN-

Pin Definition

33

Pin No. Pin Name I/O Description

1 YPbPr_Y I YPbPr _ Y out
2 YPbPr _Pb I YPbPr_ Pb out
3 YPbPr _Pr I YPbPr _Pr out
4 YCBCR_ Y I YCBCR_Y out
5 YCBCR_CB I YCBCR_CB out
6 YCBCR_CR I YCBCR_CR out
7 GND - GND
8 GND - GND
9 GND - GND

Function: Audio Input Port 1(for YPbPr & YcbCr)
Connector type: RCA
Specification: CNNT-RCA*4 Red White/Red White-F DIP RIGHT ANGLE 8.3ψ-6PIN

Pin Definition

Pin No. Pin Name I/O Description

1 AR1_ YPbPr I Audio IN _R YPbPr
2 AL1_ YPbPr I Audio IN _L YPbPr
3 AR2_YCbCr I Audio IN _R YCBCR
4 AL2_YCbCr I Audio IN _L YCBCR
5 GND - GND
6 GND - GND

Function: CVBS & S-VIDEO Input Port
Connector type:
Specification: CNNT-RCA*1 Yellow+S-VIDEO*1 Black-F DIP RIGHT ANGLE 8.3ψ-9PIN

Pin Definition

Pin No. Pin Name I/O Description

1 CIN_SC2 I S-VIDEO_C IN

2 YCVBS_SC2 I S-VIDEO_Y IN

3 GND O GND

4 GND O GND

5 CVBS_SC1 I AV IN

6 GND - GND

34

7 GND - GND

8 GND - GND

9 GND - GND

Function: Audio Input Port 2(for CVBS & S-VIDEO)
Connector type: RCA
Specification: CNNT-RCA*4 Red White/Red White-F DIP RIGHT ANGLE 8.3ψ-6PIN

Pin Definition

Pin No. Pin Name I/O Description

1 CVBSAR_SC1 I AUDIO IN _R (AV)

2 CVBSAL_SC1 I AUDIO IN _L (AV)

3 SR_SC2 I AUDIO IN_R (S-VIDEO)

4 SL_SC2 I AUDIO IN_L (S-VIDEO)

5 GND - GND

6 GND - GND

Function: Audio Output Port (Sub-Woofer & Line Out_R)
Connector type: RCA
Specification: CNNT-RCA*2 Up-Black Down-Red-F DIP RIGHT ANGLE 8.3ψ-3PIN

Pin Definition

Pin No. Pin Name I/O Description

1 AMP_WFOUT O Sub_Woofer Out

2 LINE_ROUT O LINE Out_R

3 GND - GND

Function: EARPHONE Output
Connector type:
Specification: CNNT-EAR Phone Jack-H-F-5pin-3.6ψ-Dip

Pin Definition

Pin No. Pin Name I/O Description

1 EAR_ROUT O EARPHONE Output_R

2 GND - GND

35

3 TPA_MODE - EARPHONE TEST

4 EAR_LOUT O EARPHONE Output_L

5 GND - GND

Function: Audio Output Port (Line Out_L)
Connector type: RCA
Specification: CNNT-RCA*1 F DIP RIGHT ANGLE WHITE-3 PIN -8.3ψ

Pin Definition

Pin No. Pin Name I/O Description

1 LINE_LOUT O LINE Out_L

TUNER BOARD

Function: Tuner Out
Connector type: FX2-40S-1.27DS
Specification: CNNT-Dip Right Angle-F -40PIN-1.27mm-0.5A

Pin Definition

Pin No. Pin Name I/O Description

1 GND - GND

2 T1_RED O CC ,V-Chip RED Out

3 T1_GRE O CC ,V-Chip GREEN Out

4 T1_BLU O CC ,V-Chip BLUE Out

5 GND - GND

6 VPC1_T1HS I CC ,V-Chip H Sync In

7 VPC1_T1VS I CC ,V-Chip V Sync In

8 GND - GND

9 T1_SIF O Tuner1 Audio Out
10 T2_SIF O Tuner2 Audio Out

11 GND - GND
12 T2_RED O CC ,V-Chip RED Out
13 T2_GRE O CC ,V-Chip GREEN Out
14 T2_BLU O CC ,V-Chip BLUE Out
15 GND - GND
16 VPC2_T2HS I CC ,V-Chip H Sync In
17 VPC2_T2VS I CC ,V-Chip V Sync In

36

18 VPC2_T2CV I AV2 Feedback signal
19 VCC I DC Power 5V
20 GND - GND
21 GND - GND
22 T1_CVBS O AV1 Out
23 T1_FB O CC,V-Chip OSD Timing Signal Out
24 GND - GND
25 VPC1_T1CV I AV1 Feedback signal
26 GND - GND
27 VVINT O CC,V-Chip Interrupt Out
28 RESETn I TT1 Reset Signal
29 GVINT O CC,V-Chip Interrupt Out
30 GND - GND
31 VSCL I I2C Clock bus for V-Port
32 VSDA I/O I2C Data bus for V-Port
33 SCL I I2C Clock bus for G-Port
34 SDA I/O I2C Data bus for G-Port
35 GND - GND
36 T2_FB O CC,V-Chip OSD Timing Signal Out
37 T2_CVBS O AV2 Out
38 GND - GND
39 VCC I DC Power 5V
40 GND - GND

KEYPAD BOARD

Function: Keypad Out
Connector type:
Specification: CNNT F 15PIN DN-V 1.25mm SIM15

Pin Definition

Pin No. Pin Name I/O Description

1 5V_KEY1 I- DC +5V power input
2 GND GND
3 KEY_X1 I Signal sent from System to Keypad 1
4 KEY_X2 I Signal sent from System to Keypad 2
5 KEY_X3 I Signal sent from System to Keypad 3
6 KEY_Y1 O Signal sent from Keypad to System 1

37

7 KEY_Y2 O Signal sent from Keypad to System 2
8 KEY_Y3 O Signal sent from Keypad to System 3

9 GND - GND
10 IRDATA1 I Signal sent from IR to Keypad
11 GND - GND
12 LED11 O Signal for LED 1
13 LED22 O Signal for LED 2
14 LED33 I Signal for LED 3
15 LED44 I Signal for LED 4

Function: IR IN
Connector type: Pin Header
Specification: CNNT-PIN HEADER-M DIP STRAIGHT-7pin-2.54mm

Pin No. Pin Name I/O

1 V5_KEY1 I- DC +5V power input

2 GND - GND

3 IRDAT I Signal sent from IR to Keypad

4 LED1 O Signal for LED 1

5 LED2 O Signal for LED 2

6 GND GND

7 GND GND

Pin Definition

Description

IR BOARD

Function: IR OUT
Connector type: Female Header
Specification: CNNT-PIN HEADER-M DIP STRAIGHT-7pin-2.54mm

Pin Definition

Pin No. Pin Name I/O Description

1 V5_KEY1 I- DC +5V power input

2 GND - GND

3 IRDAT O Signal sent from IR to Keypad

4 LED1 O Signal for LED 1

5 LED2 O Signal for LED 2

38

6 GND GND

7 GND GND

39

3. Schematic

3.0 Tuner Board

40

3.1 Graph Port Tuner

41

3.2 Interface Board

42

3.3 IR Board

43

3.4 Keypad Board

44

3.5 System Board-1 Graph Interface

45

3.6 System Board-2 Power Management

46

3.7 System Board-3 PW181 Power Management

47

3.8 System Board-4 DVI Receiver

48

3.9 System Board-5 ADC

49

3.10 System Board-6 A/V Switch

50

3.11 System Board-7 3D Comb Filter

51

3.12 System Board-8 Video Decoder (V Port)

52

3.13 System Board-9 Video Decoder (G Port)

53

3.14 System Board-10 Deinterlace

54

3.15 System Board-11 SDRAM

55

3.16 System Board-12 Image Processor

56

3.17 System Board-13 Flash Memory

57

3.18 System Board-14 Miscellaneous

58

3.19 System Board-15 LVDS

59

3.20 System Board-16 Audio DSP

60

3.21 System Board-17 Class D Audio PA

61

4. Troubleshooting

No Power

No Power

Check power plug is securely inserted into the power socket?

No

Power plug is securely
inserted into the power

socket.

Yes

1.Check Power to system Cable

2.Check System to Keypad Cable

3.Check Keypad and IR Board
confix?

Yes

If power on still failed, please

replace power module.

Please replace the cable

No

what cause the power on

failed.

62

No Sound

No Sound

Check the speaker wire connector to system board?

Yes

Check the input source and audio
cable into the correct connector?

Yes

1.Keep OSD is not in mute mode.

2.Confirm the volume value is not 0.

3.Power off, and re-plug power socket again.

4.If items 1,2,3 have no problem, replace interface board or
system board.

No

No

Please connection the

speaker wire to system

board.

Confirm input source and

audio cable select to the

correct channel.

63

No Source Input

RGB or video source can’t be found

Check OSD select correct?

Yes

Confirm input source and the

No

output of OSD select is

correct.

Check image signal input at system board or interface board.

Yes

Replace system board or interface board.

No

Check input source cable

connection into the

connector.

64

Keypad Failed

Keypad no response

Yes

1.Check the cable of keypad to system board.

2.Check keypad founction.

3..If item 1,2 have no problem, please replace keypad board or
system board.

65

IR Failed

IR no response

Check IR board connection in to keypad board?

Yes

Check remote control have energy?

Yes

No

No

Please connection the IR

board into keypad board.

Change remote
control battery.

Replace IR board

66

LED Failed

LED are not bright

Check the cable of system board to keypad?

Yes

Check keypad and IR board confix?

Yes

No

No

Please connection the cable

of system board to keypad.

Please connection the IR
board into keypad board.

Replace IR board.

67

5. Firmware upgrade applications

Installation file: Flashupgrader.exe
COM port setting: COM1 as default

A specific directory for update:
There are some files should be in this directory. (bootcode.hex, configdata.hex, flasher.hex, gui.hex,
romcode.hex, and FlashAll.inf)
In a new version firmware, FlashAll.inf is the same. The files of Hex depend on the different firmware
version.

Cable switch: on System（S）side

Power cord: Plug out before update

a. Insert RS232 cable in Mouse socket or RS232 socket and make sure the power cord is out of AC

inlet.

b. Execute Flashupgrader.exe then click the button of Choose on the top of display.
c. Open FlashAll.inf in the specific directory and then click the button of Flash. This indicator of this

button will swap to Cancel instead of Flash. A message of Waiting for target reset is also showed.

d. Insert the power cord, and the update will be executed automatically.
e. After the whole process of update, the indicator of Close will appear again. Plug out the power cord

as a reset to the TV, and the new firmware is ready.

Remark: Serial

connection, 115200 Baud Rate, COM1, and Flash mode are the default in this execution.

68

6. Standard Operation Procedure

6.0 Module assembly process
Step 1. Stand module loose

69

Step 2. Tuner module and Interface module assembly

70

Step3. Label stick

71

6.1 Module repair process

6.1.1 Tuner & Interface module

72

6.1.2 Stand module

73

6.1.3 Back Cover & Speaker module

74

6.1.4 PCBA module

75

6.1.5 Power module

76

6.1.6 LCD module

77