HP W1907 Service Manual

4.7 Checking the interface circuit of sync signal
4.7.1 Checking the control circuit of horizontal sync pluse for VGA
Check the horizontal sync signal on P302 pin 13 TTL
level.
OK
NG
Failure Point
VGAVideocableisfailure.
Check the horizontal sync signal on I306 pin 89 TTL
level.
OK
NG
Failure Point
1) Printed wire broke between P302 pin 13 and
I306 pin 89.
2) FB311, R321 is open.
3) R324, C328 is short.
Failure Point
Process "Checking the resolution change IC movement"
section.
4.7.2 Checking the control circuit of vertical sync pluse for VGA
Check the vertical sync signal on P302 pin 14 TTL
level.
OK
NG
Failure Point
VGAVideocableisfailure.
Check the vertical sync signal on I306 pin 90 TTL
level.
OK
NG
Failure Point
1) Printed wire broke between P302 pin 14 and
I306 pin 90.
2) FB312, R322 is open.
3) R323, C327 is short.
Failure Point
Process "Checking the resolution change IC movement"
section.
Page 20
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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