LC-37GA9EK (serv.man8). Troubleshooting Tables - Sharp TV Service Manual (repair manual). Page 12

Read Sharp LC-37GA9EK (serv.man8) Service Manual online

43
 LC-26GA5E
 LC-32GA5E
  LC-32GA9E/LC-32BV9E
  LC-37GA9E/LC-37BV9E
39
LC-32/37GA9E
LC-32/37BV9E
TROUBLESHOOTING TABLE
 (Continued)
NO
NO
NO
YES
YES
Is "EXT6" selected with
button on the remote control?
Select "EXT6" with        button 
on the remote control.
YES
Is the type of video signal 
(Signal Type) from HDMI-
connected external device set?
From MENU-Option-HDMI 
Setup-Signal Type, select a 
signal type ("RGB", "YCbCr 
4:4:4" or "YCbCr 4:2:2").
Is the type of colour signal 
(Colour Matrix) from HDMI-
connected external device set?
From Option-HDMI Setup-
Colour Matrix, select a color 
signal type ("AUTO", "ITU601" 
or "ITU709").
NO
NO
YES
YES
Is digital signal (RX
`± signal) 
sent to pins (1) – (12) of EXT6 
(HDMI) terminal (SC1902)?
Is I2C signal (SDA/SCL signal) 
sent to pins (16) and (15) of 
EXT6 (HDMI) terminal? Check 
external connection and 
peripheral circuits.
Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent to pins (110) – (144) 
of IC1905 (HDMI-RECEIVER)?
Check power supply (3.3/1.8V) 
of IC1905, SDA/SCL signal pins 
(99) and (74), and peripheral 
circuits.
NO
YES
Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent to pins (73) – (50) of 
IC3002 (VCT)?
Check SDA3/SCL3 signal pins 
(27) and (28), interface between 
IC1905 and IC3002, and 
peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and (140) - (129) and (128) of IC3002 (VCTP), and is 
CLK signal (LVDS_CN/CP) sent from pins (132) and (131)?
NO
Check pins (192), (170) and 
(133) of BU3.3V power line and 
pins (185), (169) and (142) of 
1.8V power line of IC3002 
(VCTP), and peripheral circuits.
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - (24) and (25) of CONNECTOR CN1 in LCD-
CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?
NO
Check CONNECTOR (P2305, 
CN1) and Hareness Wire (LV).
YES
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?
NO
Is LCD5V supplied to pins (31) 
– (28) of CONNECTOR 
(P2305)?
Check Hareness Wire (LV).
YES
                                                                    Replace LCD-CONT-UNIT.
<When EXT6 is used for external input>
Checklist:
1) Is "INPUT SOURCE" button        on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT5".
2) Have you checked the type of video signal sent from HDMI-connected external device? ··· Confirm the type (it should be "RGB", "YCbCr 4:4:4" or 
    "YCbCr 4:2:2").
3) Have you checked the type of Colour Matrix sent from HDMI-connected external device? ··· Confirm the type (it should be “ITU601’ or “ITU709”.)
4) Is ANT-CABLE disconnected or connected improperly? ··· Connect it correctly as per the operation manual.
No picture on the display (8)
Troubleshooting Table (continued)
Page of 12
Display

Download Sharp LC-37GA9EK (serv.man8) Service Manual (Repair Manual)