DOWNLOAD Sharp LC-32X20E (serv.man4) Service Manual ↓ Size: 973.71 KB | Pages: 22 in PDF or view online for FREE

LC-32X20E/S/RU, LC-37X20E/S/RU

4 – 17

                                             
Does not the picture of the HDMI signal input to EXT5/6 go out?

MAIN UNIT:                          
EXT5
Is the HDMI detection function output from pin (19) of the HDMI 
terminal (SC1501) normal? 

NO

EXT5
Check between SC1501and IC1507(HDMI_SW)of pin(16).
(IC1506, etc.)

EXT6
Is the HDMI detection function output from pin (19) of the HDMI 
terminal (SC1502) normal? 

NO

EXT6
Check between SC1502 and IC1507(HDMI_SW) of pin(36).
(IC1506, etc.)

YES

                                             

YES

Check the connection and setup with the external HDMI devices.

EXT5
Is EDID data pin (6)/SCL, pin (5)/SDA of IC1501 (EEPROM) 
accessed, and is it read from pin (15), (16) of a HDMI terminal 
(SC1501) pin(15), (16)?

NO

Is access possible in the re-writing or exchange of EDID data of 
IC1501?

NO

Check the circumference circuit of SC1501, IC1501and IC1507.

EXT6
Is EDID data pin (6)/SCL, pin (5)/SDA of IC1502 (EEPROM) 
accessed, and is it read from pin (15), (16) of a HDMI terminal 
(SC1501) pin (15), (16)?

NO

Is access possible in the re-writing or exchange of EDID data of 
IC1502?

NO

Check the circumference circuit of SC1501, IC1501and IC1507.

YES

EXT5
Is TMDS signal input into pin (19, 18)/TMDS2_CLKP/N

±, 

(22, 21)/TMDS2_D0P/N, (25, 24)/TMDS2_D1P/N, (28, 27)/
TMDS2_D2P/N of IC1507 from SC1501?

NO

Check the line between SC1501 and IC1507.

EXT6
Is TMDS signal input into pin (39, 38)/TMDS1_CLKP/N

±, 42, 41)/

TMDS1_D0P/N, (45, 44)/TMDS1_D1P/N, (48, 47)/TMDS1_D2P/
N of IC1507 from SC1502?

NO

Check the line between SC1502 and IC1507.

YES

Is each signal output from pin (10, 11)/TMDS_CLKP/N, (7, 8)/
TMDS_D0P/N, (4, 5)/TMDS_D1P/N, (1, 2)/TMDS_D2P/N, (77, 
78)/SDA_SINK/SCL_SINK, (79)/DDC5VOR_A of IC1507?

NO

Is the control signal of IC1507 and IC9101 (CPLD) normal?
(HDMI_SW_INT, HDMI_RST, etc.)

YES

Is each signal of IC3301 (VIDEO_PROCESSOR) pin (L1, L2)/TMDS_CLKP/N, (M1, M2)/TMDS_D0P/N, (N1, N2)/TMDS_D1P/N, (P1, P2)/
TMDS_D2P/N, (T11, U11)/SDA_SINK/SCL_SINK, (T10)/DDC5VOR_A input?

YES

NO

Refer to “The picture doesn't appear in all modes.”

Check the line between IC1507 and IC3301.

LC-32X20E/S/RU, LC-37X20E/S/RU

4 – 18

                                             
Does not the picture of the DVI(ANALOG) video signal input to EXT7(15pin-D-SUB terminal) go out?

MAIN_UNIT:                         
Are the video signal and the synchronized signal input from pin 
(1, 2, 3)/(R, G, B), (13 and 14)/(V, H) of input terminal D-SUB 
(SC1504)?

YES

Check the connection and setup between SC1504 and its cir-
cumference circuit as well as the external HDMI devices. 
(IC1503, etc.)

NO

Are the video signal and the synchronized signal input from pin 
(U8, Y7, W10)/ (R, G, B), pin (V10, U10)/(H, V) of IC3301 (VIDEO 
PROCESSOR)?

YES

Check the line between SC1504 and IC3301.

NO

Refer to “The picture doesn't appear in all modes.”

                                            
Does not the picture of the component video signal input to EXT8 go out?

TERMINAL UNIT:                 
Is COMPONENT video signal input into pin (3)/Y, (5)/Pb, (7)/Pr of 
the input terminal J508?

NO

Check the connection of J508 and the external input device.

YES

Is COMPONENT video signal input into pin (33)/Y, (35)/Pb, (37)/
Pr of IC506 (VIDEO SELECTOR)?

NO

Check the line between J508 and IC506.

YES

Is detection signal COMP1_PLUG of the COMPONENT video 
signal from pin (2) of the input terminal J508 normal?

NO

Check from the input terminal J508 to pin (38) of IC506. 

YES

Is COMPONENT signal output into pin (56), (58), (60) of the con-
nector SC501 from pin (60)/Y, (59)/PB, (58)/PR of IC506?

NO

Check the line between IC506 and SC501.
(Q516, Q518, Q520, etc.)

MAIN UNIT:                          

YES

Is COMPONENT signal output from pin (56), (58), (60) of the 
connector (SC1101)?

NO

Check the connector (SC501/SC1101)

YES

Is COMPONENT signal input into pin (W6), (Y9), (W8) of IC3301 
(VIDEO_PROCESSOR)?

NO

Check the line between SC1101 and IC3301.

YES

Refer to “The picture doesn't appear in all modes.”

LC-32X20E/S/RU, LC-37X20E/S/RU

4 – 19

                                            
No picture appears on EXT1 - connected monitor during the tuner (U/V) reception.

                                            
Checklist:
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? 

⋅ ⋅ ⋅ Set it to “CVBS”, “Y/C” or “RGB”.

2) Is ANT-CABLE disconnected or connected improperly? 

⋅ ⋅ ⋅ Connect it correctly as per the operation manual.

3) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.

When sent by component, etc., that signal is not sent to the monitor.

4) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
5) The video output from EXT1 is not the monitor output (output of the picture now watching).

The picture of the last selected TV channel is always sent to EXT1. (Specification)

TERMINAL UNIT:                 
Is CVBS signal output into pin (19) of SC502 (SCART1) from pin 
(2) of IC1501 (SW)?

YES

Check the setting of an external input device that connects of 
SC502.

NO

Is TUNRE_CVBS signal input into pin (6) of IC503 (SW)?

YES

Check the IC501 (SW), IC503 (SW) and their peripheral circuits.

NO

Is TUNRECVBS signal output from pin (17) of IC7504 (IF-
DEMO)?

YES

Check the line between IC7504 and IC503.
(Q7505, IC7508, etc.)

NO

Is IF signal output from pin (17) of TUNRE (TU7501)?

YES

Check the IC7504/FL7502 (VIF_SAW) and its peripheral circuits.

NO

Check whether I2C is normally accessed between TU7501 and 
IC7507 (COFDM).

LC-32X20E/S/RU, LC-37X20E/S/RU

4 – 20

                                            
No picture appears on EXT1 - connected monitor during the tuner (DTV) reception.

                                            
Checklist:
1) Is the Signal Type (item) in MENU-Option-Input Select equal to Signal Type of an external device? 

⋅ ⋅ ⋅ Set it to “CVBS”, “Y/C” or “RGB”.

2) Is ANT-CABLE disconnected or connected improperly? 

⋅ ⋅ ⋅ Connect it correctly as per the operation manual.

3) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of EXT1-3.

When sent by component, etc., that signal is not sent to the monitor.

4) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
5) The video output from EXT1 is not the monitor output (output of the picture now watching).

The picture of the last selected TV channel is always sent to EXT1. (Specification)

TERMINAL UNIT:                 
Is CVBS signal outputted from pin (2) of IC1501 (SW) to pin (19) 
of SC502 (SCART1)?

YES

Check the setting of an external input device that connects of 
SC502.

NO

Is DTV_CVBS signal sent to pin (4) of IC503 (SW)?

YES

Check the IC501 (SW), IC503 (SW) and their peripheral circuits.

MAIN UNIT:                          

NO

Is DTV_CVBS signal output to pin (54) of connector (SC1101)?

YES

Check the line between SC1101 (MAIN_UNIT)/ SC501 (TERMI-
NAL UNIT) and IC503.

NO

Is DTM_CVBS signal output to pin (AD4) of IC8101?

YES

Check the line between IC8101 and SC1101.

NO

Check the IC8101 and its peripheral circuits.