Troubleshooting - JVC LT-17AX5 Service Manual

[LT-17AX5, LT-17AX5/S, LT-17AX5/A]
Reset the MCU(I016)
Picture
by pressing the power
shows
key or replugging the
power cord
Still no
picture
MCU(I016)
hangs
End
Replace I016
End
The H. or V. sync
does not hold
Are the output of
Yes
I037(CLK, H, V, DE)
is normal
No
Are the input
waveforms of I037
is normal
Yes
Replace I037
End
1-22 (No.YA351)
SECTION 5

TROUBLESHOOTING

No picture appear
No
Does the LED The voltage of
light up L021, L022 is 12V
Yes
No
LED light to
Next
amber
The voltage of
I005 2pin is 12V
Yes
No
Is it entering into
power saving mode
The voltage of
I005 1pin is 5V
Yes
Restart PC signal
to ensure H. V. sync
are not absent The voltage of
I016 8pin, 10pin
and 14pin is 5V
End
Replace I016
Are flex cable
Are flex cable
Yes
attached firmly at
attached firmly
the LCD panel
at P014
connectors
No
Tighten two flex
Replace LCD panel
cables at P014
End
End
No
Replace F001
Yes
No
Replace
L021 & L022
Yes
No
Replace
I005
Yes
No
Check I016 socket is
loosened
Yes
No
Tighten flex cable
at P014
Yes
End
Next
No
The voltage of
Replace I025
I025 2pin is 3.3V
Yes
No
The voltage of
Replace I009
I009 2pin is 3.3V
Yes
No
The voltage of
Replace I028
I028 2pin is 2.5V
Yes
No
The voltage of
Replace I001
I001 2pin is 5V
Yes
No
The voltage of
Replace I004
I004 2pin is 1.8V
Yes
No
The voltage of
Replace I003
I003 2pin is 1.8V
Yes
No
The voltage of
Replace I019
I019 2pin is 3.3V
Yes
Replace I037
End