ViewSonic VA2226w-1, Service Manual

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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