ViewSonic VX715 Service Manual

ViewSonic Corporation
28
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6. Trouble Shooting Flow Chart
6.1 No Display On Screen
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 CN103 pin5 /6= 12 V?
Measured CN103 pin 9/10= 5V?
Measured power supply of IC101 3.3V,
2.5V?
Check Correspondent component.
Is there any shortage or cold solder?
OK
Disconnected the Signal cable (Loose the Signal
cable), Is the screen show “Cable Not
Connected”?
Connected the Signal cable again,
Check LED status.
Green
Check Inverter
control relative
circuit
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
Green
Check the Wire-Harness from CN106
Measured RGB (C152, C145, C135)
H/V Input at IC101 pin 42,43, Was
there have signal?
Check Correspondent
component short/open
(Protection Diode)
NG
OK, Wire tight enough
Check Panel-Power Circuit Block
Check U102 Data-output Block
Replace Power board and Check
Inverter control relative circuit
Re-do White balance adjust
Measured Crystal
OK
Replace IC102 (RTD2523)
OK
OK
NG
OK
Orange
OK, Keyboard no stuck
OK

ViewSonic VX715 Specifications

General

Response time	25 ms
Display diagonal	17 \
Display resolution	1280 x 1024 pixels
Vertical scan range	85 Hz
Horizontal scan range	82 kHz
Viewing angle, vertical	130 °
Viewing angle, horizontal	140 °
Display brightness (typical)	300 cd/m²
Panel mounting interface	100 x 100 mm
Power requirements	AC 110/230 V ( 50/60 Hz )
I/O ports	1 x VGA - 15 pin HD D-Sub (HD-15) 1 x DVI-D - 24 pin digital DVI
Compatibility	PC/Mac
Certification	TCO '03, FCC Class B certified, CE, MPR II, UL, TUV GS, VCCI, C-Tick, BSMI, ISO 9001, GOST, cUL, EPA Energy Star, GS, ISO 13406-2, NEMKO, NOM, PCBC, SASO, TCO '99, ISO 14001, CB, CCC, TUV Ergo, PSB
Market positioning	-
Power consumption (typical)	35 W
Operating relative humidity (H-H)	20 - 90 %
Maximum operating temperature range (T-T)	0 - 40 °C

Weight and Dimensions

Depth (without stand)	176 mm
Width (without stand)	388 mm
Height (without stand)	438 mm
Weight (without stand)	5000 g