LC50/58/65U35T
6 – 19
No detection of USB devices
USB1: Side terminal
Is 5V output from pin(6) of IC1602?
NO
Is pin(3) of IC1602 3.3V?
NO
Check the
peripheral
circuits of
IC3303.
YES
YES
Check the connection of a USB cable, USB devices, and periph-
eral circuits of IC1602.
Are there the USB signals at input pins
of IC3301(CPU)?
NO
Check the USB line (between J1601 and IC3303) and its periph-
eral circuits.
[J1601 USB interface pins]
pin(2/3)(USB3.0 D-/+), pin(5/6)(USB3.0 RX-/+),
pin(8/9)(USB3.0 TX-/+).
[IC3303 USB interface pins]
pin(D31/C31)(USB3.0 D-/+), pin(A32/B32)(USB3.0 RX-/+),
pin(A34/B34)(USB3.0 TX-/+).
YES
Check J1601/IC3303 and its peripheral
circuits.
USB2/3: Bottom terminal
s 5V output from pin(6) of IC1603/
IC1604?
NO
Is pin(3) of IC1603/IC1604 3.3V?
NO
Check the periph-
eral circuits of
IC3303.
YES
YES
Check the connection of a USB cable, USB devices, and
peripheral circuits of IC1603/IC1604.
Are there the USB signals at input pins
of IC1601(USB Hub)?
NO
Check the USB line (between J1602 and IC1601) and its
peripheral circuits.
[J1602 USB interface pins]
pin(2/3)(USB D-/+)
[IC1601 USB interface pins]
pin(15/16)(USB D-/+)
YES
Check the USB line (between J1603 and IC1601) and its
peripheral circuits.
[J1603 USB interface pins]
pin(2/3)(USB D-/+)
[IC1601 USB interface pins]
pin(12/13)(USB D-/+)
Check J1602/J1603/IC1601 and its peripheral circuits.
Are there the USB signals at input pins
of IC3303(CPU)?
NO
Check the USB line (between IC1601 and IC3303) and its
peripheral circuits.
[IC1601 USB interface pins]
pin(1/2)(USB D-/+)
[IC1601 USB interface pins]
pin(B17/A17)(USB D-/+)
YES
Check J1602/J1603/IC1601 and its
peripheral circuits.
Summary of Contents for LC-50U35T
Page 47: ...LC50 58 65U35T 8 4 19 18 17 16 15 14 13 12 11 10 BOARD SIDE A ...
Page 48: ...LC50 58 65U35T 8 5 A C B D E F G H 2 10 9 8 7 6 5 4 3 1 PRINTED WIRING B ...
Page 49: ...LC50 58 65U35T 8 6 19 18 17 16 15 14 13 12 11 10 NG BOARD SIDE B ...
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Page 90: ...LC50 58 65U35T 24 11 EXPLODED VIEW LC 50U35T EXPLODED VIEW LC 50U35T ...
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