Dell E193FPc User Manual

Dell E193FPc
37
9.2 Trouble shooting
9.2.1 Main Board
No display
Note: 1. If replace “Main-Board”, Please re-do “DDC-content” programmed & “White-Balance”.
2. If replace “Power Board” only, Please re-do “ White-Balance”
OK
Measured CN104 pin5 = 5 V?
Measured U101 pin 44= 5V?
Measured U105 pin 2= 3.3V?
Check Power board, is there DC level output?
Check U105 pin3=5V, U105 pin2=3.3V?
Is there any shortage or cold solder?
OK
Disconnected the Signal cable (Loose the
Signal cable), Is the screen show Block
WRGB color bars?
Connected the Signal cable again,
check LED status.
Green
ReplaceU102
Scalar IC
NG
Connected the Signal
cable again Check LED
status.
Check Power switch is in Power-on
status, and check if Power switch had
been stuck?
Orange
OK, Keyboard no stuck
Orange
Green
Check the Wire-Harness from CN101
Measured RGB (R112, R114,)
H/V Input at U102 pin 95,96,
Was there have signal?
Check
Correspondent
component
short/open
(Protection Diode)
NG
OK, Wire tight
enough
Check Panel-Power Circuit Block
OK, Panel Power OK
Check U102 Data-output Block
Replace Inverter board and Check
Inverter control relative circuit
Re-do White balance adjust
Measured Crystal X102
OK
Replace U102 (ZAN3XL)
OK
OK, U104 data OK
NG
OK

Dell E193FPc Specifications

General

Brand	Dell
Model	E193FPc
Category	Monitor
Language	English