Sharp HT-CN150DVW, Service Manual

Page: 89 / 123

HT-CN150DVW
89
IC001, Self Tuned Radio (STR) (TEA5762)
Pin Description:
Symbol Pin Description
RIPPLE 1 ripple capacitor input
AM-RFI 2 AMRF input
RFGND 3 RF ground and substrate
CGND 4 counter ground
COUNTI 5 counter input
AMOSC 6 parallel tuned AM-oscillator circuit to ground
Vcc1 7 supply voltage
TUNE 8 tuning output current
VCO 9 voltage controlled oscillator input
AFO 10 AM/FM AF output (output impedance typical 5 k
Ω
)
MPXI 11 stereo decoder input (input impedance typical 150 k
Ω
)
LFI 12 loop filter input
MUTE 13 mute input
AFLO 14 left channel output (output impedance typical 4.3 k
Ω
)
AFRO 15 right channel output (output impedance typical 4.3 k
Ω
)
PILFIL 16 pilot detector filter input
IFGND 17 ground of IF, detector and MPX stage
FMDEM 18 ceramic discriminator input
AFC(n) 19 AFC negative output
AFC(p) 20 AFC positive output
FSI 21 field strength indicator
V
CC2
22 supply voltage for tuning
V
DDD
23 digital supply voltage
MO/ST 24 mono/stereo and tuning indication output
XTAL 25 crystal input
DGND 26 digital ground
BUS-CLOCK 27 bus-clock input
DATA 28 bus data input/output
WRITE-ENABLE 29 bus write-enable input
P0 30 programmable output port (P0)
P1 31 programmable output port (P1)
AFC 32 450 kHz LC-input circuit for AM AFC
FM-IFI2 33 FMIF input 2 (input impedance typical 330
Ω
)
V
STAB(B)
34 internal stabilized supply voltage (B)
FM-IFO1 35 FMIF output 1 (input impedance typical 330
Ω
)
AM-IFI/O2 36 input/output to IFT;output; current source
FM-IFI1 37 FMIF input 1 (input impedance typical 330
Ω
)
V
STAB(A)
38 internal stabilized supply voltage (A)
FM-ON/OFF 39 FM ON/OFF port
AM-MIXER 40 open-collector output to IFT
AM-IFI1 41 IFT or ceramic filter input (input impedance typical 3 k
Ω
)
RFGND 42 FMRF ground
n.c. 43 not connected
AGC 44 AGC capacitor input