HP W1907 Service Manual

Check the TMDS signal from computer input on
P303 of DVI-D video connector.
OK
NG
Failure Point
1) No TMDS signals output from host computer,
check computer.
2) DVI-D video signal cable disconnection.
Check the TMDS input video signals on I306 pin
72, 73, 75, 76, 80, 81, 83, 84 respectively that
their differential input voltage is 150 to 1200 mV.
Failure Point
In the case of the RX2+/- signal. (A RX1, 0, and
RXC signal is the same path, too.)
1) Printed wire broke between P303 pin 1, 2 and
I306 pin 72, 73.
2) DVI-D video cable is failure.
3) R332, R333 is open.
NG
OK
Check all LVDS signals being output to P306
from I306?
Failure Point
1) Printed wire broke between I306 and P306.
2) LVDS cable failure.
NGOK
Prpcess "Checking the resolution change IC
movement" section.
4.4.2 Abnormal screen for DVI source
Page 16
Check the HP output signal to P303 pin 16
respectively that voltage is 4.0 to 5 V.
NG
OK
Failure Point
The HP is high will to generated TMDS from PC
host.
1) Check P303 pin 14 if is 5V.
2) Printed wire broke between P303 pin 14 and
Q305.
3) C343, C344 is short.
4) Q305 is failure.
5) DVI-D cable is failure.
6) Printed wire broke between Q305 and I306 pin
86.
7) R361 is open. Q305 is failure.
8) I306 is failure.
022-83718162
www.chinadse.org
022-83715667

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