Sharp TU-37GD1E (serv.man8) Service Manual ▷ View online
43
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
(Continued)
NO
NO
NO
NO
NO
NO
Are the R/G/B and DTV-H/V signal
input from Pins (25)(26)(27) and Pins
(28)(8) of INPUT5=DVI Connector
(SC1900) respectively?
input from Pins (25)(26)(27) and Pins
(28)(8) of INPUT5=DVI Connector
(SC1900) respectively?
Is the DVI-H/V signal output from
Pins (4)(6) of IC1904 (INV)?
Pins (4)(6) of IC1904 (INV)?
Are the DVI-SR/SG/SB and the DVI-
H/V signal output from the MD
Connector (P1900)?
H/V signal output from the MD
Connector (P1900)?
Are outputs at pins (12) and (14) of
IC1917 both (L, L)?
IC1917 both (L, L)?
Check PC settings.
Check IC1911 and its
peripheral circuits.
peripheral circuits.
Check IC1917 and its
peripheral circuits.
peripheral circuits.
Check IC1904 and its
peripheral circuits.
peripheral circuits.
Check IC1901, IC1903 and
their peripheral circuits.
their peripheral circuits.
Do pins (12) and (14) become (H, H)
when digital PC mode is entered?
when digital PC mode is entered?
NO
YES
YES
YES
YES
YES
Check Pins (1)(2) of IC1917 thru Pins
(8)(9) of the ME Connector signal line.
(8)(9) of the ME Connector signal line.
Are IC1911 data accessed by I2C
when connected to PC?
when connected to PC?
Are the DVI-SR/SG/SB and the DVI-
H/V signal input to Pins
(126)(136)(141) of IC3700 (ADC) and
Pins (2)(5) of IC3701 (SYNC_SEL) in
the MAIN-PWB respectively?
H/V signal input to Pins
(126)(136)(141) of IC3700 (ADC) and
Pins (2)(5) of IC3701 (SYNC_SEL) in
the MAIN-PWB respectively?
Check MD harness for
disconnection.
disconnection.
YES
Check IC3700 (ADC), IC3701 (SYNC-
SEL) and their peripheral circuits.
SEL) and their peripheral circuits.
YES
DVI Input (Analog AV mode)
44
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
(Continued)
NO
NO
NO
NO
NO
NO
Are the R/G/B and DTV-H/V signal
input from Pins (25)(26)(27) and Pins
(28)(8) of INPUT5=DVI Connector
(SC1900) respectively?
input from Pins (25)(26)(27) and Pins
(28)(8) of INPUT5=DVI Connector
(SC1900) respectively?
Is the DVI-H/V signal output from
Pins (4)(6) of IC1904 (INV)?
Pins (4)(6) of IC1904 (INV)?
Are the DVI-SR/SG/SB and the DVI-
H/V signal output from the MD
Connector (P1900)?
H/V signal output from the MD
Connector (P1900)?
Are outputs at pins (12) and (14) of
IC1917 both (H, L)?
IC1917 both (H, L)?
Check PC settings.
Check IC1915 and its
peripheral circuits.
peripheral circuits.
Check IC1917 and its
peripheral circuits.
peripheral circuits.
Check IC1904 and its
peripheral circuits.
peripheral circuits.
Check IC1901, IC1903 and
their peripheral circuits.
their peripheral circuits.
Do pins (12) and (14) become (L, H)
when digital AV mode is entered?
when digital AV mode is entered?
NO
YES
YES
YES
YES
YES
Check Pins (1)(2) of IC1917 thru Pins
(8)(9) of the ME Connector signal line.
(8)(9) of the ME Connector signal line.
Are IC1915 data accessed by I2C
when connected to PC?
when connected to PC?
Are the DVI-SR/SG/SB and the DVI-
H/V signal input to Pins
(126)(136)(141) of IC3700 (ADC) and
Pins (2)(5) of IC3701 (SYNC_SEL) in
the MAIN-PWB respectively?
H/V signal input to Pins
(126)(136)(141) of IC3700 (ADC) and
Pins (2)(5) of IC3701 (SYNC_SEL) in
the MAIN-PWB respectively?
Check MD harness for
disconnection.
disconnection.
YES
Check IC3700 (ADC), IC3701 (SYNC-
SEL) and their peripheral circuits.
SEL) and their peripheral circuits.
YES
DVI Input (Analog PC mode)
45
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
(Continued)
NO
NO
NO
NO
NO
NO
Is the RX0.1.2.C signal input from the
INPUT5=DVI Connector (SC1900) to
Pins (2)(3)(51)(52) of IC1900 (HDCP)?
INPUT5=DVI Connector (SC1900) to
Pins (2)(3)(51)(52) of IC1900 (HDCP)?
Are the DVI-H/V and the DVI-R/G/B
signal output to Pins (18)(19) and Pins
(23)(26)(31) of IC1900 respectively?
signal output to Pins (18)(19) and Pins
(23)(26)(31) of IC1900 respectively?
Are the DVI-SR/SG/SB and the DVI-
H/V signal output from the MD
Connector (P1900)?
H/V signal output from the MD
Connector (P1900)?
Are outputs at pins (12) and (14) of
IC1917 both (L, H)?
IC1917 both (L, H)?
Check PC settings.
Check IC1911 and its
peripheral circuits.
peripheral circuits.
Check IC1917 and its
peripheral circuits.
peripheral circuits.
Check IC1900 and its
peripheral circuits.
peripheral circuits.
Check IC1901, IC1903 and
their peripheral circuits.
their peripheral circuits.
Do pins (12) and (14) become (H, L)
when analog PC mode is entered?
when analog PC mode is entered?
NO
YES
YES
YES
YES
YES
Check Pins (1)(2) of IC1917 thru Pins
(8)(9) of the ME Connector signal line.
(8)(9) of the ME Connector signal line.
Are IC1911 data accessed by I2C
when connected to PC?
when connected to PC?
Are the DVI-SR/SG/SB and DVI-H/V
signal input to Pins (126)(136)(141) of
IC3700 (ADC) and Pins (2)(5) of
IC3701 (SYNC_SEL) in the MAIN-
PWB respectively?
signal input to Pins (126)(136)(141) of
IC3700 (ADC) and Pins (2)(5) of
IC3701 (SYNC_SEL) in the MAIN-
PWB respectively?
Check MD harness for
disconnection.
disconnection.
YES
Check IC3700 (ADC), IC3701 (SYNC-
SEL) and their peripheral circuits.
SEL) and their peripheral circuits.
YES
DVI Input (Digital AV mode)
46
TU-32GD1E
TU-37GD1E
TU-37GD1E
TROUBLE SHOOTING TABLE
(Continued)
NO
NO
NO
NO
NO
NO
Is the RX0.1.2.C signal input from the
INPUT5=DVI Connector (SC1900) to
Pins (2)(3)(51)(52) of IC1900 (HDCP)?
INPUT5=DVI Connector (SC1900) to
Pins (2)(3)(51)(52) of IC1900 (HDCP)?
Are the DVI-H/V and the DVI-R/G/B
signal output to Pins (18)(19) and Pins
(23)(26)(31) of IC1900 respectively?
signal output to Pins (18)(19) and Pins
(23)(26)(31) of IC1900 respectively?
Are the DVI-SR/SG/SB and the DVI-
H/V signal output from the MD
Connector (P1900)?
H/V signal output from the MD
Connector (P1900)?
Are outputs at pins (12) and (14) of
IC1917 both (H, H)?
IC1917 both (H, H)?
Check PC settings.
Check IC1915 and its
peripheral circuits.
peripheral circuits.
Check IC1917 and its
peripheral circuits.
peripheral circuits.
Check IC1900 and its
peripheral circuits.
peripheral circuits.
Check IC1901, IC1903 and
their peripheral circuits.
their peripheral circuits.
Do pins (12) and (14) become (L, L)
when analog AV mode is entered?
when analog AV mode is entered?
NO
YES
YES
YES
YES
YES
Check Pins (1)(2) of IC1917 thru Pins
(8)(9) of the ME Connector signal line.
(8)(9) of the ME Connector signal line.
Are IC1915 data accessed by I2C
when connected to PC?
when connected to PC?
Are the DVI-SR/SG/SB and DVI-H/V
signal input to Pins (126)(136)(141)
of IC3700 (ADC) and Pins (2)(5) of
IC3701 (SYNC_SEL) in the MAIN-
PWB respectively?
signal input to Pins (126)(136)(141)
of IC3700 (ADC) and Pins (2)(5) of
IC3701 (SYNC_SEL) in the MAIN-
PWB respectively?
Check MD harness for
disconnection.
disconnection.
YES
Check IC3700 (ADC), IC3701(SYNC-
SEL) and their peripheral circuits.
SEL) and their peripheral circuits.
YES
DVI Input (Digital PC mode)
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