Pioneer DEX-MG9667DVZT/EW Service Manual page 122

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QQ
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- FM/AM Tuner Unit
A
AM ANT
1
B
FM ANT
3
ATT
ATT
C
No. Symbol I/O Explain
1 AMANT I
TE
L 13942296513
2 RFGND
3 FMANT I
4 VCC
5 SL O
6 CE2 I
7 WC I
D
8 CE1 I
9 CK I
10 DI I
11 LDET O lock detector
12 OSCGND
13 ROM_VDD
14 DO O
15 DGND
16 COMP O
17 VDD_3.3
E
18 RDS_CK O RDS clock
19 RDS_DATA O RDS data
20 RDS_LOCK O
21 RDS_HSLK O
22 ANT1
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23 L ch O L channel output
24 R ch O R channel output
F
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7 6 13
VCO
TANK RF TANK
RF LPF
IFT
2 12 15 4 17
AM antenna input AM antenna input high impedance AMANT pin is connected with
an all antenna by way of 33 µH. (LAU type inductor) A series circuit
including an inductor and a resistor is connected with RF ground for
the countermeasure against the hum of power transmission line.
RF ground Ground of antenna block
Input of FM antenna 75 Ω Surge absorber is necessary.
FM antenna input
The power supply for analog block. D.C 8.4 V ± 0.3 V
power supply
signal level Output of FM/AM signals level
chip enable-2 Chip enable for EEPROM "Low" active
write control You can write EEPROM, when EEPROM write control is "Low".
Ordinary non connection
chip enable-1 Chip enable for AF•RF "High" active
clock Clock data input
data in Data input
"Low" active
osc ground Ground of oscillator block
power supply Power supply for EEPROM pin 13 is connected with a power supply of
micro computer.
data out Data output
digital ground Ground of digital block
composite output FM composite signal output.
The power supply for digital block. 3.3 V ± 0.2 V
power supply
Output of RDS clock(2.5 V)
Output of RDS data(2.5 V)
RDS lock Output unit "High" active(2.5 V) (RDS_LOCK turns over by the
external transistor. "Low" active)
RDS high speed Output unit "High" active(2.5 V)(RDS_HSLK turns over by the
lock external transistor. "Low" active)
diversity antenna Antenna switch control signal output. "High" : MAIN, "Low" : SUB
control
FM stereo "L-ch" signal output or AM audio output
x ao
y
FM stereo "R-ch" signal output or AM audio output
. i
DEX-MG9667DVZT/EW
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8
5 10 9 8 11 14 18 19 20 21
IC4 IC3
5 V 3.3 V EEPROM
LPF
IC1
MIX/IF/PLL
CF X-tal
Q Q
3 6 7 1 3
u163
.
3
4
2 9 9 4 2 8
COMP
16
Rch
24
Lch
23
IC2
DET/NC/MPC/MPX/DIV/RDS
ANT1
22
OSC
REG
1 5 0 5 8 2 9
m
co
4
9 9
9 4 2 8 9 9