ViewSonic Va703b3 Service Manual

							
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1152*870@75Hz 
75.062 −
 
915 870 3  39   
60.000 +  1800 1280 112  312 VESA 
1280*960@60Hz 
60.000 +  1000 960  3  36  108.000 
75.000 +  1800 1280 112  312 1280*960@75Hz 
75.000 +  1000 960  3  36  130.000 
63.981 +  1688 1280 112  248 VESA 
1280*1024@60Hz 
60.020 +  1066 1024 3  38  108.000 
79.976 + 
1688 1280 144  248 VESA 
1280*1024@75Hz 
75.025 + 1066 1024 3  38  135.000 
 
4. Power On/Off Sequence 
4.1 Hardware Power ON 
When power cord is plugged into AC socket, SMPS starts work and provides U105 with VCC5V. When VCC5V 
inputs, U105 resets circuit active, sets U105 all register
s to preset modes, and then monitor goes into stand-by 
mode. That means hardware power on has been completed.   
 
4.2 Software Power ON/OFF 
When press power key, U105 # 90 recieves lo w pulse,and then U105 will do the power on/off. 
-   If Power ON, U105 # 91(LED_Green) will send out Low potential, and then LED green on.     
-   If Power OFF, U105 # 91(LED_Green) will send out High potential, and then LED Off. 
The Panel_Vcc, Backlight_En, CLK/DATA output  to panel will follow the following sequency. 
 
 
 
 
T1 (ms)  T2 (ms)  T3 (ms) T4 (ms) T5 (ms) T6 (ms)  T7 (ms) 
0.1~10 0~10  >200  >100  0~50  0.1~15  >1000 
 
 
5.  AC Outlet Pin Assignment 
                                  
Pin Symbol Description 
1 L  Live 
2 N  Neutral 
3 E  GND 
 
 
 
P801
12
3 
						

							
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6. Inner Connector Pin Assignment 
 
6.1 CN501, CN502, CN503, CN504 (Connect to Panel Backlight, SM02B-BHSS-1-TB or equivalent) 
Pin Symbol Description 
1  H.V.  High voltage for lamp 
2 L.V.  Low voltage for lamp 
 
6.2 CN101 (Power BD to Interface BD) 
Pin No. Symbol Description 
1 VCC5V +5.1V  INPUT 
2 VCC5V +5.1V INPUT 
3 GND GND 
4 ON/OFF  CCFL on/off control 
5  BRIGHTNESS  Panel luminance control (CCFL brightness) 
6 GND Ground 
7  VOL  Volume control input (For VA703m only) 
8 MUTE  Mute control input (For VA703m only) 
 
6.3 CN106 (Interface BD to Keypad) 
Pin 
No. Symbol Description 
1  LED_ORANGE  Orange LED lighting control 
2  LED_GREEN  Green LED lighting control 
3 GND Ground 
4  KEY_MENU/EXIT  OSD page selection and exit 
5  KEY_SELECT/AUTO  Select control and auto adjustment control 
6  KEY_POWER  DC power on/off control 
7 KEY_DOWN  OSD “ ▼” control to adjust value to decrease 
8 KEY_UP  OSD “▲” control to adjust value to increase 
 
6.4 CN103 (Connect I/F BD to  panel, FI-X30S-H or Equivalent) 
Pin No. Symbol Function 
1  RXO0-  minus signal of odd channel 0(LVDS) 
2  RXO0+ plus signal of odd channel 0(LVDS) 
3  RXO1-  minus signal of odd channel 1(LVDS) 
4  RXO1+ plus signal of odd channel 1(LVDS) 
5  RXO2-  minus signal of odd channel 2(LVDS) 
6  RXO2+ plus signal of odd channel 2(LVDS) 
7 GND  Ground 
8  RXOC- minus signal of odd clock channel (LVDS) 
9  RXOC+ plus signal of odd clock channel (LVDS) 
10  RXO3-  minus signal of odd channel 3(LVDS) 
11  RXO3+ plus signal of odd channel 3(LVDS)  
						

							
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 12  RXE0-  minus signal of even channel 0(LVDS) 
13  RXE0+  plus signal of    even channel 0(LVDS) 
14 GND  Ground 
15  RXE1- minus signal of even channel 1(LVDS) 
16  RXE1+  plus signal of even channel 1(LVDS) 
17 GND  Ground 
18  RXE2- minus signal of even channel 2(LVDS) 
19  RXE2+  plus signal of even channel 2(LVDS) 
20  RXEC- minus signal of even clock channel (LVDS) 
21  RXEC+  plus signal of even clock channel (LVDS) 
22  RXE3- minus signal of even channel 3(LVDS) 
23  RXE3+  plus signal of even channel 3(LVDS) 
24 GND  Ground 
25 GND Ground 
26 GND 
Ground or Open 
27 GND Ground 
28  VCC 
Power supply (5.0 V) 
29  VCC Power supply (5.0 V) 
30  VCC Power supply (5.0 V) 
 
6.5 CN102 (D-SUB Connector) 
 
Pin Symbol Pin Symbol PinSymbol 
1  Red video input  6  Red GND  11  GND 
2  Green video input  7  Green GND 12  Serial data (SDA) 
3  Blue video input  8  Blue GND  13  H / H+V SYNC 
4 GND 9  +5V(from PC)  14 VSYNC 
5  Cable Detect 10  GND  15  Data clock line (SCL) 
 
 
7. Key Parts Pin Assignment 
 
7.1 IC802 (TOP245Y or TOP246Y, Power Control IC) 
Pin Symbol I/O Description 
1 C I Control   
2 L I Line Sense 
3 X  I  External Current Limit 
4 S O  Source of MOSFET(GND) 
5 F I Frequency 
6  D  I  Drain of MOSFET 
 
7.2 IC501 (OZ9938GN, CCFL inverter controller IC) 
Pin No. Symbol I/O Description 
1 DRV1 O Drive output 
2  VDDA  I  Supply voltage input 
3  TIMER  I  Timing capacitor to set striking time and shut down delay time 
4  DIM  I  Analog dimming or Internal LPWM dimming or external PWM  
						

							
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pulse input for dimming function 
5  ISEN  I  Current sense feedback   
6  VSEN  I  Voltage sense feedback 
7  OVPT  I  Over-voltage/over-current protection threshold setting pin 
8 NC    
9 NC    
10  ENC  I  ON/OFF control of IC 
11  L C T   I   Timing capacitor to set internal PWM dimming frequency and 
also a pin for analog dimming selection   
12  SSTCMP  I  Capacitor for soft start time and loop compensation 
13  CT  I  Timing resistor and capacitor for operation and striking frequency 
14  GNDA    Ground for analog signals   
15 DRV2  O Drive output  
16  PGND    Ground for power paths   
 
7.3 U105(TSUM16AL)
 
Pin Symbol I/O Description 
1 NC    Not connected  
2 GND    Ground 
3 NC   Not connected 
4 NC   Not connected 
5 GND    Ground 
6 NC   Not connected 
7 NC   Not connected 
8 AVDD_DC I  ADC Power 
9 NC    Not connected 
10 NC    Not connected 
11 GND   Ground 
12 NC    Not connected 
13 NC   Not connected 
14 AVDD_DC I  ADC Power 
15  REXT    External resistor 390 ohm to AVDD_ADC 
16 AVDD_PLL I  PLL Power 
17  BIN0M  I  Reference ground for analog blue input 
18  BIN0P I  Analog blue input 
19  GIN0M  I  Reference ground for analog green input 
20  GIN0P I  Analog green input 
21 SOGIN0  I  Sync-on-green input 
22  RIN0M I  Reference ground for analog red input 
23  RIN0P I  Analog red input 
24 AVDD_ADC  I  ADC Power 
25  REFM    Internal ADC bottom de-coupling pin 
26  REFP    Internal ADC top de-coupling pin 
27  HSYNC0 I  Analog HSYNC input 
28  VSYNC0 I  Analog VSYNC input 
29 GND    Ground 
30 DDCA_SDA/RS232_TX  I/O  DDC Data for Analog Interface; 4mA driving 
strength/UART Transmitter/GPIO  
						

							
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31 DDCA_SCL/RS232_RX  I/O  DDC Clock for Analog Interface/UART 
Receiver/GPIO 
32  VDDP 
I  Digital Output Power 
33 GND    Ground 
34 VDDC I  Digital Core Power 
35 GPIO_P15/PWM0  I/O  General Purpose Input/Output; 4mA driving 
strength/Pulse Width Modulation Output; 4mA driving 
strength 
36 NC 
  Not Connected 
37  SDO I  SPI Flash Serial Data Output 
38  SCZ O  SPI Flash Chip Select 
39  SCK O  SPI Flash Serial Clock 
40  SDI  O  SPI Flash Serial Data Input 
41 NC    Not Connected 
42 NC   Not Connected 
43 GPIO_P11/I2C_MDA  I/O  General Purpose Input/Output; 4mA driving 
strength/I2C Master Data 
44 GPIO_P10/I2C_MCL  I/O General Purpose Input/Output; 4mA driving 
strength/I2C Master Clock 
45 NC 
 Not Connected 
46 NC 
  Not connected 
47 NC   Not connected 
48 GPIO_P27/PWM1  I/O  General Purpose Input/Output; 4mA driving 
strength/Pulse Width Modulation Output; 4mA driving 
strength 
49  VDDP 
I  Digital Output Power 
50 GND    Ground 
51 VDDC I  Digital Core Power 
52 MODE[0]  I  Chip Configuration Input 
53 MODE[1] I  Chip Configuration Input  
54  LVA3P O  A-Link Positive LVDS Differential Data Output 
55  LVA3M  O  A-Link Negative LVDS Differential Data Output   
56  VDDP  I  Digital Output Power 
57 GND    Ground 
58  LVACKP O  A-Link Positive LVDS Differential Clock Output   
59  LVACKM O  A-Link Negative LVDS Differential Clock Output   
60  LVA2P O  A-Link Positive LVDS Differential Data Output 
61  LVA2M  O  A-Link Negative LVDS Differential Data Output 
62  LVA1P O  A-Link Positive LVDS Differential Data Output 
63  LVA1M  O  A-Link Negative LVDS Differential Data Output   
64  LVA0P O  A-Link Positive LVDS Differential Data Output   
65  LVA0M  O  A-Link Negative LVDS Differential Data Output   
66 VDDC  I  Digital Core Power 
67  LVB3P O  B-Link Positive LVDS Differential Data Output 
68  LVB3M  O  B-Link Negative LVDS Differential Data Output 
69  LVBCKP O  B-Link Positive LVDS Differential Clock Output 
70  LVBCKM O  B-Link Negative LVDS Differential Clock Output  
						

							
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71  LVB2P  O  B-Link Positive LVDS Differential Data Output 
72  LVB2M  O  B-Link Negative LVDS Differential Data Output 
73  LVB1P O  B-Link Positive LVDS Differential Data Output   
74  LVB1M  O  B-Link Negative LVDS Differential Data Output   
75  VDDP  I  Digital Output Power 
76 GND    Ground 
77  LVB0P O  B-Link Positive LVDS Differential Data Output 
78  LVB0M  O  B-Link Negative LVDS Differential Data Output 
79 GND    Ground 
80  BYPASS    For External Bypass Capacitor 
81 NC   Not connected 
82 VDDC I  Digital Core Power 
83 GND    Ground 
84  RST I  Chip Reset; High Reset   
85  GPIO_P12 I/O  General Purpose Input/Output; 4mA driving strength 
86 PWM1/GPIO_P25  I/O  Pulse Width Modulation Output; 4mA driving 
strength/General Purpose Input/Output; 4mA driving 
strength 
87  RSTN 
I  Chip Reset; Low Reset 
88 GPIO_P00/SAR1  I/O  General Purpose Input/Output; 4mA driving 
strength/SAR ADC Input 
89 GPIO_P01/SAR2  I/O General Purpose Input/Output; 4mA driving 
strength/SAR ADC Input 
90 GPIO_P02/SAR3  I/O General Purpose Input/Output; 4mA driving 
strength/SAR ADC Input 
91 GPIO_P06 
I/O General Purpose Input/Output; 6/12mA 
programmable driving strength 
92 GPIO_P07 
I/O General Purpose Input/Output; 6/12mA 
programmable driving strength 
93 PWM0/GPIO_P26  I/O  Pulse Width Modulation Output; 4mA driving 
strength/General Purpose Input/Output; 4mA driving 
strength 
94  GPIO_P13 
I/O  General Purpose Input/Output; 4mA driving strength 
95  GPIO_P14 I/O  General Purpose Input/Output; 4mA driving strength 
96 XIN  I  Crystal Oscillator Input 
97 XOUT O  Crystal Oscillator Output 
98 AVDD_MPLL  I  MPLL Power 
99 GPIO_P16/PWM2  I/O  General Purpose Input/Output; 4mA driving strength/ 
Pulse Width Modulation Output; 4mA driving strength 
100 NC 
  Not connected 
  
						

							
 
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1.  Key Function Description 
CONTROL KEY KEYS FUNCTION 
[AUTO] [2]  By pressing [AUTO] key,  “Auto Image Adjust” is performed 
[MENU] [1]  By pressing [MENU] key, Main menu display   
[▼ ] [▲ ]  A. When “MENU OSD” display, press these keys to change the contents of an 
adjustment item, or change an adjustment value 
B. When “MENU OSD” is un-display, press these keys to change brightness and  contrast 
[POWER]  Power on or power off the monitor 
  
2. Hot Key Operation  
 
3. OSD Control 
3.1 OSD table 
Layer 1 Layer 2 Layer 3 
Auto Image Adjust     
Contrast (+ / -)   Contrast/Brightness 
Brightness (+ / -)   
Vo l u m e  Volume (+ / -) Audio ( for VA703m only) Mute On/Off 
sRGB   
9300K   
6500K   
5400K   
Red (+ / -) 
Green (+ / -) 
Color Adjust 
User Color Blue (+ / -) 
Information     
H Position (+ / -) H/V Position 
V Position (+ / -) 
H Size  + / - 
Manual Image Adjust 
Fine Tune + / - 
Hot Key Function 
Item Function Detail 
Recall Contrast or Brightness while in the Contrast or Brightness adjustment; [▲ ] + [▼ ] Recall both Contrast and Brightne ss when the OSD is not open 
[1] +[2] Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode 
[1] + [▼] + [▲] 
(keep pushing 5 sec) White Balance (Not shown on user’s guide) 
[1] + [▼ ] Power Lock 
[1] + [▲] OSD Lock 
[▼ ] + [▲ ]+ [] Enter Factory Mode 
Remark: All the function above are only available while OSD off 
5. Adjustment Procedure 
 
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Sharpness + / - 
English 
French 
German 
Italian 
Spanish 
Finnish 
Japanese 
Simplified Chinese 
Language Select 
Traditional Chinese 
Resolution Notice  On/Off 
H Position (+ / -) OSD Position 
V Position (+ / -) 
OSD Time Out   
Setup Menu 
OSD Background On/Off 
Memory Recall     
 
3.2 OSD lock Menu function 
 
                          OSD Lock Menu Function Check 
Item Method Phenomenon 
Activate OSD lock  [1] + [ ▲] 10S  Press any of buttons1, 
▼,  
 ▲ , 2 will appear OSD Locked 
3s 
Deactivate OSD lock:  [1] + [ ▲] 10S(again) 
 
NOTICE:  
When the OSD is locked will lock all functions. 
Status bar indicating OSD Lock or Unlock is in progress and when complete it will indicate “OSD 
Locked” 
        OSD Lock should not lock Power Button and Power Lock function 
 
3.3 Power lock Menu function 
                        Power Lock Menu Function Check 
Item Method Phenomenon 
Activate Power Lock  [1] + [ ▼] 10S  Can not turn off the LCD; 
Press the power button will 
appear Power Button Locked 
OSD 3s; 
LCD would automatically turn 
back On when power is restored 
after a power failure 
Deactivate Power Lock    [1] + [
▼] 10S(again) 
 
NOTICE:  
Status bar indicating Power Button lock or unlock is in progress and when complete it will indicate 
“Power Button Locked” 
  Power should only be lockable in the “On State” 
 
3.4 Resolution notice function 
Resolution Notice Menu 
Item Method Phenomenon 
Activate Resolution 
Notice Menu   Resolution Notice OSD should show 
on screen after changing to 
non-native mode for 30 sec,   
And it should disappear after 10s   
or by pushing button [1] or [2] 
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Deactivate  
Resolution Notice Menu  Push button [2] under Resolution 
Notice OSD, select Disable 
------- 
 
3.5 Factory Mode Introduction 
When input the signal, press “power key” to turn off the monitor. Press”  [▼ ] +[ ▲] +[] “at the same time so 
as to enter factory mode. Afte r power on, press ‘’Menu[1]’’ key, you can see the Factory menu. 
 
INL-V7  : Currently using panel model name 
V3 060620  : Currently using firmware version information. 
Auto Color  : Automatically ca librate chip ADC parameter by using chip internal DAC 
Color Temperature  : The R, G, B of 9300K and 6500K and 5400K and User Mode 
    Colors are all generated from scaling back end. 
 
4. Burn-in pattern
 
If it is a new monitor, and in factory mode, if no VGA signal input, Burn-in pattern will self generate automatically. 
Burn in patterns are: full Red, Green, Blue, White and Bl ack. You can not escape from Burn-in pattern until plug in 
VGA Cable, and then press the power key. Turn the monitor off and then turn it on. 
 
5. Auto Color (Automatically calibrate  chip ADC parameter by using chip 
internal DAC) 
If it is a new-built set and it is first time to do  the “auto color”, please confirm the following steps: 
-Connect the VGA cable with the standard video pattern generator and display 16-gray pattern on the monitor. 
- Press “Power” to power off the monitor. 
- Press” [ ▼] +[▲ ] +[
] “simultaneously to enter factory mode. 
- Press ‘’Menu[1]’’, then press ‘’Auto[ 2]’’ to execute Auto color item. 
- After the “Auto Color” process finished, please press “Power” to restart monitor. 

 
 
 
 
 
 
 
 
 
 
  
						

							
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EDID (Rewrite EDID  data to EEPROM) 
If we need to rewrite the EEPROM data, please confirm the following steps. 
1. Plug in VGA Cable; we can rewrite the EDID  data to EEPROM by using “EDID Rewrite” program. 
2. If the “EDID Rewrite” process finished, please pull out VGA cable and press ‘’2’’+’’ ▲’’ at the same time. 
3. Pull out AC power cable or press power key to restart. 
 
Upload firmware to MCU via VGA Cable 
1. Connect ISP board between monitor and PC as below configure 
ISP Board 
Print Port  25PIND-SUB 
15PIN
LCD Monitor 
D-Sub 
Insert to Print 
Port 25pin 
CON on PC 
Service 
cable 
2.   Using mStar ISP Tool Update FW:   
(1). Seletct “Read”, Choose the co rresponding firmware, load to MCU.