ViewSonic Vx2235wm4 Service Manual

8. Schematic Diagrams   38
 
ViewSonic Corporation   
Confidential - Do Not Copy    
VX2235wm-4 
Model
TitleDate Rev:ViewSonic Corporation
DC TO DC
8.1. DC TO DC
5V 3.3V
modify value 6/27
modify value 7/6
5V_PANEL
VDA_1V8 2,3
LCDVDD 3
VDD_CTRL
4
3.3DVCC 3,4,5
DGND 2,3,4,5
adj_BACKLIGHT 4
5V_AMP 5
on_BACKLIGHT 4
DGND
DGND
DGND
+5V
VDA_1V8
DGND
DGND
5V_PANEL
3.3DVCC
DGND
+5V
DGND
DGND
+5V
DGND
DGND
+5VDGND
DGND
DGND
P101
CON9
123456789
Q102
NC/MMBT 3904
B
EC
R111 47K
R109
22K
C108
100nF
R110 220
R102 100...

  39
 
ViewSonic Corporation   
Confidential - Do Not Copy    
VX2235wm-4 
Model
TitleDate Rev:ViewSonic Corporation
INPUT
 
8.2. INPUT
 add R188 add D? add netDVI_DET  +5V change to DVI5V  0616
add C154 ,
Q109
DEL R130,R133,R134,C118,D112,I103
DEL NET DVI5V
hunk 060704
P.4 and P.11 from GND modify NULL  060728
0619-for HDCP
hunk modify add 0603 cap  060728
modify R117 and R119 sch  060731 add R194  060731
HSI_1 PC5V
VSI_1
RXC+RXC- RX2-
RX0+
RX0- RX1-
RX1+ RX2+
SDA SCL
VGA_DET0 4
RX2P 3RX1N 3RX1P 3RX2N...

  40
 
ViewSonic Corporation   
Confidential - Do Not Copy    
VX2235wm-4 
Model
TitleDate Rev:ViewSonic Corporation
SCALER
8.3. SCALER
Closed to Scaler
Pin3.Host interface location
--> 1:112~115,118, 119 ;
0:52~57
Pin5 host interface SEL
--> 1:Parallel ;
0:Serial
R137 R136
HSD220MKW1-A:
R135 NC   R136 137 
0R AUO M220EW01:
R135 137  NC  
R136   NC CMO
M220Z1-L01:
R135 137  0R  
R136   NC
R135
L107  value:80R7/6
RXCN XI
33VRST_REF
RX2P RST_OUT
RX2N
RX0N RX1N
RX0P
B1-
B1+
G1+ G1-
SOG1
R1+ R1- RXO2+...

  41
 
ViewSonic Corporation   
Confidential - Do Not Copy    
VX2235wm-4 
Model
TitleDate Rev:ViewSonic Corporation
MCU
 
8.4. MCU
2
3
1
C E
B Closed to MCU
3.3V
add netDVI_DET  0616
r170.r179~modify value 330R for 5mA 0627
add R189 res pull high 0630
hunk 060704
P6.1 change to P6.2
MCU pindefine changeP3.4 change to P6.0
P3.5 change to P6.1
1
25
P3
雙向P5單向
13
24 37
P6
單向
MTV512M-LQFP4848
X1,X2 36
P1
雙向
12
ADD pull high
hunk 060704
ADD NET
HDCP_SCL
HDCP_SDA
HDCP EEPROM HDCP
EEPROM
R192 , R193
ADD
R190 ,...

  42
 
ViewSonic Corporation   
Confidential - Do Not Copy    
VX2235wm-4 
Model
TitleDate Rev:ViewSonic Corporation
AUDIO AMPLIFIER
8.5. Audio Amplifier
5/20 ADD   PCB
對 板邊接地
0525   modify value modify value 0616
41
2
SOLDER
SIDE 5
351
2
SOLDER
SIDE 3
4
now pin define
correct pin define
layout modify pin define
modify value 0627
modify value 0627
modify value 0627
 from two smt 0805 bead modify dip type and make a drill include of the \
cap 1500UF  060728
DEL C604 , C623
hunk 060706
7/28 cap package...

  43
 
ViewSonic Corporation   
Confidential - Do Not Copy    
VX2235wm-4 
Model
TitleDate Rev:ViewSonic Corporation
PLACEMENT
 
8.6. PLACEMENT
JP1 AMP
120
1011
DC power IN
1
9
LVDS output connector
X1 MCU
D-SUB
DVI
KEY connector
10 1
4 1
Speaker
RTD 2553V
100mm
90mm
Earphone 12
930
2
9PIN
改 

  44
 
ViewSonic Corporation   
Confidential - Do Not Copy    
VX2235wm-4 
Model
TitleDate Rev:ViewSonic Corporation
KEY BOARD
8.7. Key Board
D701
LED
2
3
1
S704
SW
12
S702
SW
12
P701
wafer 2.0mm 90
87654321
SELECT
DOWN UP
MENU GND
LED_GREEN
LED_AMBER POWER
S705
SW
12
S703
SW
12
S701
SW
12 

  45
 
ViewSonic Corporation   
Confidential - Do Not Copy    
VX2235wm-4 
Model
TitleDate Rev:ViewSonic Corporation
INVERTER
8.8. INVERTER
Brightness
24V
ON_OFF
5V
D908
1N4148
C925
0.1uF
C913
0.01uF
R903
200K 1%
Q912
AP4953M/SO8
6
54
3
7
81
2
+
C922
220U/25V
Q902
2SA733
3
1
2
C912
0.01uF
C901
47nF
C902
15P,3KV
T901
23743 01604P
7
6
10
12345
Q905
P2804HVG
6
54
3
7
81
2
D913
1N4148
D915
1N4148
C909
2200P
R908
10K
C920
2200P
C919
4700pF/50V
D912
1N4148
C908
4700pF/50V
C923
2200P
I901
OZ9936G
1234
5678...

  46
 
ViewSonic Corporation   
Confidential - Do Not Copy    
VX2235wm-4 
Model
TitleDate Rev:ViewSonic Corporation
POWER
 
8.9. POWER
24V5V
5V
GND
GND
5 V
Brightness
ON_OFF
24V
+
C805 120uF/400V
R851
1.21K 1%
R809
10K
R842
1K
D806
UF4007
R808
100K/1%
R838
470R
+
C823
470uF/35V
R803
910K
R821
22 1/2W
+
C822
470uF/35V
R811
0.47R/ 2WS
R822
 47 2WS
L803
jumper
R828
62K 1%
D821
GMR10H200C
1
3
2
C828 NC
R832
470R
C820
1000PF/1KV
C804
0.1uF
+
C8241000UF/10V
Q801
FQPF7N65C1
23T801 DS-33193125
9768
R854
100
+...

9. PCB Layout Diagrams   47
 
ViewSonic Corporation   
Confidential - Do Not Copy    
VX2235wm-4 
9.1. MAIN PCB TOP VIEW