Table of Contents
Advertisement
BD-HP90S
CHAPTER 4.
BDHP90S
TROUBLESHOOTING TABLE
[1] TROUBLESHOOTING TABLE (MAIN PWB)
Flowchart 1
Is the power turned on?
YES
Is the power turned off soon?
YES
Are the following output voltages avail-
able at the TLs?
TL9019: 5V
TL9016: 1.2V
TL9017: 3.3V
TL9018: 1.5V
YES
Does the X7201 oscillate at 27 MHz?
YES
Check the following parts and their
peripheral circuits. Replace any of them
as required.
IC7806: NAND flash memory
IC7802 thru -5: DDR3 memory
IC7208: Host LSI
Flowchart 2
Replace the TV cable with new one. Is the problem solved?
Is the voltage at Pin 19 of SC7201 above 2V?
Is there the 3.3V input at Pins 1 and 8 of IC7201 as well as at Pin
14 of IC7204?
Is there the signal output along the data line (R7288/R7289)?
Check SC7201 for poor contact or poor welding.
Failure to power on the set.
NO
Is the Q9004-Base voltage (MAIN_P-con) at high level?
Is the 12V input fed to Pin 1 of J9002?
NO
Check F9001, Q9003 thru -4, Q9008,
IC9001 thru -4 and their peripheral
parts. Replace any of them as
required.
NO
Check the crystal oscillator and
IC7208, and replace any of them as
required.
No video signal from the HDMI terminal.
NO
YES
YES
YES
Service Manual
YES
NO
YES
YES
TV or cable defective.
NO
Check to see if the 5V output is at Pin 1 of IC7203. If not, replace
this IC with new one.
NO
Check to see if the 3.3V output is at Pin 5 of IC7202. If not,
replace this IC with new one.
NO
Check IC7208. Replace this IC as required.
4 – 1
NO
Check Pin 85 of IC2504 (FuCon).
Check the AC adaptor.
Advertisement
Table of Contents
