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ViewSonic Corporation
Confidential - Do Not Copy
VA2226w-1
6.3 U701 (Audio amplifier)TDA7496L
SYMBOL
PIN
DESCRIPTION
GND 1
Ground
GND
2
Ground
GND
3
Ground
Signal L
4
Signal input left
VAR out
5
VAR output
VOLUME
6
DC volume control
VAR out
7
VAR output
NC
8
Not connected
Signal R
9
Signal input right
SVR
10
Supply voltage rejection
STBY
11 Standby
MUTE 12
Sound
mute
GND
13 Ground
OUTR
14 Audio output right
VS 15
Power
supply
VS
16 Power supply
OUTL
17
Audio output left
GND 18
Ground
GND 19
Ground
GND 20
Ground
6.4 IC501 (OZ9910G, CCFL Inverter controller IC)
Pin Symbol
I/O
Description
1
NDRV2
O
Bottom MOSFET gate drive output in dual forward converter
2 PGND
High-current
power
ground
3
NDRV1
O
Bottom MOSFET gate drive output in dual forward converter
4
GNDA
Low-current signal ground
5
CT
I
Timing capacitor of high frequency oscillator
6
LCT
I
Timing capacitor to set LPWM frequency
7
DIM
I
Control command input -- DC
8 ENA
I
Enable
input
9
VSEN
I
Voltage sense feedback
10
CMP_SST
I
Soft start and loop compensation capacitor
11
ISEN
I
Current sense feedback
12
V5000
O
Reference voltage output
13
VIN
I
Supply voltage for IC
14
HSB
I
High side driver buffer output
15
PDRV1
O
Top MOSFET gate drive output in dual forward converter
16
PDRV2
O
Top MOSFET gate drive output in dual forward converter
Содержание VA2226w-1
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Страница 51: ...48 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 Front Cover Back Cover...
Страница 52: ...49 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 Keypad Board Chassis...
Страница 53: ...50 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 Power Board Key Power Cable LVDS Cable...
Страница 54: ...51 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 I F Board...
Страница 60: ...57 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 6 5 Backlight can t be turned on...
Страница 61: ...58 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 6 6 Black Screen and backlight turn on...
Страница 63: ...60 ViewSonic Corporation Confidential Do Not Copy VA2226w 1 6 8 Bad Screen...
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