Sharp LC-32WD1E/S/RU - Page 44

NO picture on display via EXT-4 (YPbPr) input
No picture on LCD screen when EXT-4 YPbPr input source selected
Checklist:
1) Is "INPUT SOURCE" button on the remote control set up correctly ? ==> See operation manual and set "INPUT SOURCE" to "EXT4"
2) Is MENU-PICTURE-Contrast/Brightness set to "MIN" ? ==> Set it to appropriate level
3) Check connection to external device ==> Connect it correctly as per the operation manual for the device
4) check if supported format is connected to EXT4
v yes
Are YPbPr signals arriving to pins 6(Y), 4(Pb) and 2(PR) on
connector X0215 ?

no
Check external connection, input setting, YPbPr connector and
peripheral circuits.
v yes
1. HD patch check
are YPbPr signals arriving to video switch TDA8601 (D1301)
at pins 3(Y), 2(Pb) and 4(Pr) ?

no
check C1317(Y), C1313(Pb), C1321(Pr) and check other peripheral
circuits on YPbPr signals
v yes
are YPbPr signals arriving to TDA9975AEL/10(D030), check on
capacitors: C033(Y), C034(Pb) and C030(Pr) ?

no
check YPbPr signals peripheral circuits (termination resistors, buffers
V030,V031,V032 and other peripheral circuits)
v yes
Is Hirate_MCLK 13,5MHz clock present on R0368 ?

no
Check PNX5010E (D040) SW and its peripherals (power supply,
XTAL,….)
v yes
Is TDA9975AEL/10(D030) Hirate_CLK clock there on R0325?,
are the CS (R0328), HS (R0330) and VS (R0331) signals there ?
AND are the VPA(x), VPB(x) and VPC(X) signals toggling on the
network resistors R030-R034 and on R0310-R0318?

no
TDA9975AEL/10 (Hirate) (D030) is not functioning normal,
check PNX SW, check if TM_SCL and TM_SDA are functioning
normal and check other peripherals (power supply,…) of D030
v yes
GOTO VIDEO PATH CHECK
2. SD patch check
are YPbPr signals arriving to both sides of C0177(Pr), C0175(Y) and
C0164(Pb) ?

no
Check video switch TDA8601 (D1301) power supply (+8V_SW) and
peripherals
Check if SLCT_RGB_YPbPr is set correctly
v yes
Is TDA15134E (D013) UOCV_DVCLK clock there
AND are the UOCV_DV(x) signals toggling?

no
TDA15134E (UOCV) (D013) is not functioning normal,
check GTV SW and peripherals (power supply,xtal,…) of D013
v yes
are UOCV_DV(x) and UOCV_DVCLK signals arriving to
the CPLD (D080) (XC2C128-7TQG144C) ?

no
check resistor networks on UOCV_DV signals
v yes
GOTO VIDEO PATH CHECK
LC-32WD1E/S/RU, LC-37WD1E/S/RU, LC-42WD1E/S/RU, and LC-32/37/42WT1E
6-13