Daewoo DTA-14C4TFF Service Manual page 46

APPENDIX
IC DESCRIPTION
Pinning
Symbol Pin Description
IFIN 1 Sound IF differential input signal
n.c. 2 Not connected
C
3 AGC capacitor
AGC
C
4 REF voltage filtering capacitor
REF
n.c. 5 Not connected
AMOUT 6 AM demodulator output
AMIN 7 Input signal from audio switch
AFOUT 8 Output signal from audio switch
EXTIN 9 Input signal (from external) to audio switch
SWITCH 10 Switch input select control
V
11 Supply voltage +12V (alternative)
P2
MUTE 12 Mute control
GND 13 Ground (0V)
V
14 Supply voltage +5V to +8V
P1
n.c. 15 Not connected
IFIN 16 Sound IF differential input signal
3. TDA7267A - 3W Mono amplifier
• Can deliver 3W THD 10% 14.5V/8Ω
• Internal fixed gain 32dB
• No feedback capacitor
• No boucherot cell
• Thermal protection
• AC short circuit protection
• SVR capacitor for better ripple rejection
• Low turn ON/OFF pop
• Stand-by mode
Block Diagram
24