ViewSonic Va1916w2 Service Manual

 22 6. Troubleshooting Flow Chart  
Troubleshooting 
 
No power  
Make sure power button (or switch)is ON. 
Make sure A/C power cord is securely connected to the LCD display. 
Plug another electrical device (like a radio)into the power outlet to verify that the outlet is 
supplying proper voltage. 
Power is ON but no screen image 
Make sure the video cable supplied with the LCD display is tightly secured to the video output 
port on the back of the computer. If the other end of the video cable is not...

 23 7. Block Diagram  
  

 25 8. Schematic Diagrams  
8.1 main board 
 
8.2 power board 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  

Main board 
VGA VGA_SDABI+GI+RI+VSINHSINGI+RI+BI+HSINVGA_SCLR4
0402/2.2K/5%Z5
OPEN/UDZSF-5.6B/RoHS1
2
D3
OPEN/BAV99/RoHS1
3
2
Z1
OPEN/UDZSF-5.6B/RoHS
1
2
Z6
OPEN/UDZSF-1.9V
1
2
C3
OPEN/0402/100n/16V/YC4
OPEN/0402/100n/16V/YCN1
MLX89263-6762/RoHS162738495111213141510C1
OPEN/0402/100n/16V/YD4
OPEN/BAV99/RoHS1
3
2
R6OPEN/0402/0R/5%Z2
OPEN/UDZSF-5.6B/RoHS
1
2
R5
0402/2.2K/5%C5
OPEN/0603/10u/6.3V/5/BZ3
OPEN/UDZSF-5.6B/RoHS
1
2
Z4
OPEN/UDZSF-5.6B/RoHS
1
2
D1
OPEN/BAV99/RoHS1
3
2...

MCU AMP_SHDNMUTESOURCE_SELECTR41
0402/10K/5%R43
0402/10K/5%PC-99 CircuitYOUTMCU_VDDMCU_VDDGND_POWERMUTER106
0402/4.7K/5%Q1
2N7002/RoHS13
2
R12
0402/10K/5%MUTER32
0402/10K/5%MCU_VDDQ3
2N7002/RoHS1
3
2
GND_POWERGND_POWERQ5
2N7002/RoHS1
3
2
DVI_HPD +    0.8V   -+  0.24V  -MCU_VDDGND_POWERC16
0805/1u/25V/7R21
0402/1K/5%R23
0402/10K/5%
綼 
MCU+ 0.79V - + 0.79V -INV_ON/OFF INV_ON/OFF INV_ON/OFF INV_ON/OFF INV_ON/OFF INV_ON/OFFR137
0402/1.5K/5%R136
0402/100R/1%R138
OPEN/0402/10M/5%INV_ON/OFFQ10
BSS841
3
2...

SCALAR TCON5R1922 ohm 1/16WRI1-RI1
RTD_SDIO3
BI1-BI1GI1GI1-
TCON11GND GNDRTD_SCLKRTD_SCSB
TCON0TCON4 TCON1TCON13TCON2
TCON7OPTION Remark
PIN5(TMDS TEST):Host Interface SelectH--ParallelL--Serial
PIN4(PLL TEST2):Crystal in FrequecyH--1X(24MHz Crystal)L--2X(12MHz Crystal)
PIN3(PLL TEST1):MCU Host interfaceTypeH--112~115+118/119, L--51~56
RX2+RX0+RX1-RX1+RX2-RXC-RXC+RX0-RTD_SDIO3A_R1PA_R0PA_R0NA_R1N
A_G1PA_G1NA_B0NA_B0PA_B2NA_B2PA_G0NA_G0PA_CKPA_G2PA_CKNA_B1PA_B1NA_R2PA_R2NA_G2N
YOUTVSYNCHSYNCB_B1N...

INTERFACE LED_GRNCN701
HEADER 1012345678910B12MCB1608S601EA12B10MCB1608S601EA12
[INV_GND]GND_POWERGND_POWER+5VLED_OLED_GSOURCE_SELECTLED_GLED_O OSD InterfaceU10
EC50117KAG/3.3V/1AGND1
VOUT2VIN 3VOUT4 TO252GND_POWERAUTO_ADJKEY_DOWNV33DKEY_UPMENUL3 0 ohmL1 0 ohmL2 0 ohmL4 0 ohmC6
OPEN/0402/100n/16V/YC8
OPEN/0402/100n/16V/YC7
OPEN/0402/100n/16V/YC9
OPEN/0402/100n/16V/Y+ C59
100uF/16VPWR_SW+5V+ C71
100uF/16V+ C63...

AUDIO 
delete C55LINRINLIN-RIN-LIN-RINRIN-LINMUTEAMP_SHDNVOL_PWMU7
APA2068SE/BTL13ROUT+14VDD15ROUT-16MUTE 1/SHDN 2RIN- 3BYPASS 4GND 5LIN- 6VOL 7VOLMAX 8LOUT-9VDD10LOUT+11GND12R82
0402/0R/5%C54
1206/10u/10V/YC570805/2.2u/16V/YR85OPEN/0402/0R/5%D17
OPEN/VPORT0603470KV05T1
2
C560402/1u/10V/YR810603/0R/5%R84OPEN/0402/0R/5%C580402/1u/10V/YR830402/0R/5%D16OPEN/VPORT0603470KV05T
1
2
R86
OPEN/0402/0R/5%J1
2SJ-05101NC32101131R87...

L0451RBS2_MB_01_080428Edward_Huang
2008-04-28 01AOC 19LIPS
Kavin_Weng
Kavin_WengHP-L0451RBS2
0 HIPRO
1
C 10 9 8 7 6 5 3 2 14
H
G
F
A B C D
Form  086    Rev. 0 E I J
H
G
F
A B C D E I J 111213
10 9 8 7 6 5 3 2 141112131 of Page
Model No.:
Draw By : Chk By : Size
HIPRO ELECTRONICSHIPRO ELECTRONICS CO., LTD.
Title :
Apv. By :
Date : Rev. :Code : File Name :
This document is the property of
HIPRO and may not be transferred 
, except as authorized by HIPRO from the custody of HIPRO1ST2ndFLYBACK
EMI FILTERPWM...

 32 9. PCB Layout Diagrams