Trouble Shooting
Page 11
B17AAU / B17ANU / B17AAY
8. Checking the resolution change IC movement
Is there +3.3V supply on I315 pin D13, D15, D16, E17, G17, J17, L17, N17, R17, U17, U15, U13,
U12, U10, U8, U6, U5, T4, L4, B2, B6, B7, B8, B9, B11, C3, D3, E3, F2, F4, G1, G3, H1, J1, J3.
O K
N G
Is 24MHz clock input to I315 pin J4
at TTL level?
Proceed "Checking the DC/DC converter circuit" section.
O K
N G
Is 24MHz clock output from X303
pin 5 at TTL level?
O K
N G
Is +3.3V supplied to X303 pin 8?
Failure point
Print wire broke between X303 pin 5
and I315 pin J4.
O K
N G
Failure point
Print wire broke between and X303
pin 8 and power supply.
Failure point
X303 failure
Is +5.0V supplied to I315 pin T1 at
High level (Reset signal)?
O K
N G
Check the output of 5.0V "H" pulse
from I301 pin 6.
O K
N G
Is 5.0V supplied to I301 pin 7?
Failure point
I315 failure
Failure point
Print wire broke between I301 pin 6
and I315 pin T1.
O K
N G
Failure point
I301 failure
Failure point
1) I322 failure
2) L315 open
Is there +2.5V supply on I315 pin D12, D14, D17, F17, K17, M17, P17, T17, U16, U14,
U11, U9, U7, U4, N4, K4, A6, A7, A8, A9, A10, A11.
N G
O K
Proceed "Checking the DC/DC converter circuit" section.
Summary of Contents for B17AAU
Page 1: ...17 inch LCD Monitor B17AAU B17ANU B17AAY Service Manual...
Page 30: ......
