STR-DN1070
27
Flow of Repair (when sound is not outputted) (4/5)
Check that the sound from the HDMI
input is outputted.
Perform the “SOFTWARE VERSION
DISPLAY MODE” (refer to pa
ge 15
on the original service manual), and
check that the video micro-processor
version is not “0.00”.
Check that voltages of the connector pins
on the MB-1512 board are the following value.
MB-1512 board:
CN301 pin 3, 4 : +4.5V
CN301 pin 5 : +6.2V
CN301 pin 6 : +4.5V
CN301 pin 7, 8 : +2.15V
CN301 pin 9 : +1.9V
CN301 pin 10 : +2.2V
Check the following parts and the surrounding
circuit, and exchange the defective parts.
DCDC board: IC1911, IC1912, IC1913,
IC1916, F940
Check the following parts and the surrounding
circuit, and exchange the defective parts.
MB-1512 board: IC5004
Check the following parts and the surrounding
circuit, and exchange the defective parts.
MB-1512 board: IC3001, IC3002
Check the following parts and the surrounding
circuit, and exchange the defective parts.
MB-1512 board: X3000
Check that voltage of the following pin is 3.3 V,
1.1 V.
MB-1512 board: IC5004
pin43 : 1.1V ~ 1.2V
pin40: 3.3V
Check that voltage of the following pin is 3.3 V.
MB-1512 board: IC3002
pin57: 3.3V(RESET)
Check that the X3000 on the MB-1512 board is
oscillated normally.
Check the following parts and the surrounding
circuit, and exchange the defective parts.
MB-1512 board: IC3002
– Continued on page 28 –
OK
OK
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
