SERVICE MANUAL
TDA7057AQ (N191)
2×8W Stereo BTL Audio Output Amplifier with DC Volume Control
1. Features
·DC volume control
·Few external components
·Mute mode
·Thermal protection
·Short-circuit proof
·No switch-on and switch-off clicks
·Good overall stability
·Low power consumption
·Low HF radiation
·ESD protected on all pins.
2. General Description
The TDA7057AQ is a stereo BTL output amplifier
with DC volume control. The device is designed
for use in TVs and monitiors, but is also suitable
for battery-fed portable recorders and radios.
Missing Current Limiter (MCL)
A MCL protection circuit is built-in. The MCL
circuit is activated when the difference in current
between the output terminal of each amplifier
exceeds 100mA (typical 300 Ma). This level of
100mA allows for single-ended headphone
applications.
3. Block
Diagram
Fig.1
3
Block Diagram
4. Refer to Table 8 about Functions and Service Data of TDA7057AQ’ s Pins.
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Summary of Contents for MTV-DV05
Page 54: ...SERVICE MANUAL 3 block Diagram Fig17 MT1336 Function Block Diagram 54...
Page 69: ...4 Horizontal Vertical Scan Circuit 4 1 No raster but with sound SERVICE MANUAL 69...
Page 70: ...4 2 No picture and no sound but with raster 5 Audio System No sound SERVICE MANUAL 70...
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