HP W1907 Service Manual

4.5 Abnormal OSD display adjust problem
Check the input level whether was changed when pressed
function keys on the P308 pin 2, 3, 4, 5. (normal is 3.3V,
when push button, generated different voltage. pin 2, 4 is
2.46V, pin 3, 5 is 2V)
OK
NG
Failure Point
1) Function key wire disconnection.
2) Function key wire is failure.
3) Function key board is failure.
Check the input voltage level whether was changed when
pressed function keys on the I306 pin 114, 115. (normal is
3.3V, when push button, generated 2.46V or 2V.)
OK
NG
Failure Point
1) Printed wire broke between P308 pin 2 and I306 pin 115.
2) Printed wire broke between P308 pin 3 and I306 pin 115.
3) Printed wire broke between P308 pin 4 and I306 pin 114.
4) Printed wire broke between P306 pin 5 and I306 pin 114.
5) C381, C382, R367, R368, C387, C388, C389, C390, C391, C392
is short.
6) R378, R379, R381, R382, R384, R385 is short or open.
7) R380, R383 is open.
Failure Point
I306 is failure.
Page 17
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HP W1907 Specifications

General

Pixel pitch	0.285 x 0.285 mm
Display diagonal	19 \
Display resolution	1440 x 900 pixels
Viewable size diagonal	483 mm
Contrast ratio (typical)	1000:1
Digital vertical frequency	55 - 75 Hz
Digital horizontal frequency	30 - 83 kHz
Power requirements	100-240VAC
HDCP	Yes
Certification	FCC Class B
Product color	Silver
Country of origin	China
Market positioning	-
Panel mounting interface	100 x 100 mm
Power consumption (standby)	2 W
Power consumption (typical)	49 W
Storage temperature (T-T)	-20 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	15 - 90 %
Sustainability certificates	ENERGY STAR

Weight and Dimensions

Depth (without stand)	182 mm
Width (without stand)	452 mm
Height (without stand)	378 mm
Weight (without stand)	5000 g