VESTEL 17MB15E-5, Service Manual

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15.25. TDA1308
15.25.1.
General Description
The TDA1308 is an integrated class AB stereo headphone driver contained in an SO8 or a DIP8 plastic
package. The device is fabricated in a 1 mm CMOS process and has been primarily developed for portable
digital audio applications.
15.25.2.
Features
• Wide temperature range
•
No switch ON/OFF clicks
•
Excellent power supply ripple rejection
•
Low power consumption
• Short-circuit resistant
•
High performance
•
high signal-to-noise ratio
•
High slew rate
• Low distortion
•
Large output voltage swing.
15.25.3.
Pinning
SYMBOL PIN DESCRIPTION PIN VALUE
OUTA 1 Output A (Voltage swing) Min : 0.75V, Max : 4.25V
INA(neg) 2 Inverting input A Vo(clip) : Min : 1400mVrms
INA(pos) 3 Non-inverting input A 2.5V
V
SS
4 Negative supply 0V
INB(pos) 5 Non-inverting input B 2.5V
INB(neg) 6 Inverting input B Vo(clip) : Min : 1400mVrms
OUTB 7 Output B (Voltage swing) Min : 0.75V, Max : 4.25V
V
DD
8 Positive supply 5V, Min : 3.0V, Max : 7.0V
15.26. TDA9886
15.26.1.
General Description
The TDA9886 is an alignment-free single standard (without positive modulation) vision and sound IF signal PLL.
15.26.2.
Features
•
5 V supply voltage
•
Gain controlled wide-band Vision Intermediate Frequency (VIF) amplifier (AC-coupled)
• Multistandard true synchronous demodulation with active carrier regeneration (very linear demodulation, good
intermodulation figures, reduced harmonics, excellent pulse response)
•
Gated phase detector for L/L accent standard
• Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free; frequencies switchable for all negative and
positive modulated standards via I
2
C-bus
•
Digital acquisition help, VIF frequencies of 33.4, 33.9, 38.0, 38.9, 45.75 and 58.75 MHz
•
4 MHz reference frequency input [signal from Phase-Locked Loop (PLL) tuning system] or operating as crystal
oscillator
•
VIF Automatic Gain Control (AGC) detector for gain control, operating as peak sync detector for negative modulated
signals and as a peak white detector for positive modulated signals
• Precise fully digital Automatic Frequency Control (AFC) detector with 4-bit digital-to-analogue converter; AFC bits via
I
2
C -bus readable
•
TakeOver Point (TOP) adjustable via I
2
C-bus or alternatively with potentiometer
• Fully integrated sound carrier trap for 4.5, 5.5, 6.0 and 6.5 MHz, controlled by FM-PLL oscillator
• Sound IF (SIF) input for single reference Quasi Split Sound (QSS) mode (PLL controlled)
•
SIF AGC for gain controlled SIF amplifier; single reference QSS mixer able to operate in high performance single
reference QSS mode and in intercarrier mode, switchable via I
2
C-bus