HP W1907 Service Manual

4.8 Checking the resolution change IC movement
Check +3.3V supply on I306 pin 110, 101, 92, 82, 74, 2, 25,47, 53, 91,
116, 63.
OK
NG Proceed " Checking the DC/DC converter circuit" section.
Check +1.8V supply on I306 pin 118, 87, 55, 17, 78, 70, 104, 106.
OK
NG Proceed " Checking the DC/DC converter circuit" section.
Check X301 14.318MHz clock input to I306 pin 108 and 109.
OK
NG
Failure Point
1) Printed wire broke between X301 and I306 pin 108, 109.
2) C362, C373 is short or open.
3) X301 failure.
Check I306 pin 111 RESETn signal is high level at normal operation.
OK
NG
Failure Point
1) Check I307 pin 2 is low level wait 200~250ms to high level, when
VCC5Visturnedon.
2) I307 failure.
3) Printed wire broke between I306 pin 111 and I307.
4) C375 is short.
5) R348 is short or open.
6) I311 failure.
Check I306 pin 59~62 SPI ROM interface signal.
OK
NG
Failure Point
1) Printed wire broke between I306 pin 59~62 and I309.
2) I309 failure.
Failure Point
I311 failure.
Page 21
Check I306 pin 50, 51, 56~59, 119 Boot configure, when Reset signal
lowtohigh.
OK
NG
Failure Point
1) Check I306 pin 50, if is low. R358 is open or short.
2) Check I306 pin 51, if is low. R354 is open or short.
3) Check I306 pin 56, if is low. R355 is open or short.
4) Check I306 pin 57, if is low. R356 is open or short.
5) Check I306 pin 58, if is low. R357 is open or short.
6) Check I306 pin 59, if is high. R363 is open or short.
7) Check I306 pin 119, if is high. R351 is open or short.
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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