Pioneer FX-MG8667DVZT/EW, Service Manual

Page: 130 / 136

FX-MG8667DVZT/EW
130
1 2 3 4
1 2 3 4
C
D
F
A
B
E
FM ANT
RFGND OSCGND DGND VCC VDD_3.3
WC
CE2
ROM_VDD
SL
DI
CK
CE1
LDET
DO
RDS_CK
RDS_DATA RDS_LOCK RDS_HSLK
7 13 5 10 8 11 14 18 19 20 21
1
3
2 12 15 4 17
AM ANT
16
23
COMP
Lch
24
Rch
22
ANT1
6 9
IC4
5V 3.3V IC3
EEPROM
IC2
DET/NC/MPC/MPX/DIV/RDS
REG
OSC X-tal CF IFT
LPF
TANK
RF
RF TANK
ATT
ATT
LPF VCO
IC1
MIX/IF/PLL
←
No. Symbol I/O Explain
1 AMANT I AM antenna input AM antenna input high impedance AMANT pin is connected with
an all antenna by way of 33
µ
H. (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.
2 RFGND RF ground Ground of antenna block
3 FMANT I FM antenna input Input of FM antenna 75
Ω
Surge absorber is necessary.
4 VCC power supply The power supply for analog block. D.C 8.4V
±
0.3V
5 SL signal level Output of FM/AM signals level
6 CE2 I
I chip enable-2 Chip enable for EEPROM ”Low” active
7 WC write control You can write EEPROM, when EEPROM write control is “Low”.
Ordinary non connection
8 CE1 I
I chip enable-1 Chip enable for AF•RF ”High” active
9 CK clock Clock data input
10 DI I data in Data input
11 LDET O lock detector “Low” active
12 OSCGND osc ground Ground of oscillator block
13 ROM_VDD power supply Power supply for EEPROM pin 13 is connected with a power supply of
micro computer.
14 DO O
O
data out Data output
15 DGND digital ground Ground of digital block
16 COMP composite output FM composite signal output.
17 VDD_3.3 power supply The power supply for digital block. 3.3V
±
02V
18 RDS_CK O RDS clock Output of RDS clock(2.5V)
19 RDS_DATA O RDS data Output of RDS data(2.5V)
20 RDS_LOCK O
O
O
RDS lock Output unit “High” active(2.5V) (RDS_LOCK turns over by the
external transistor. “Low” active)
21 RDS_HSLK RDS high speed
lock Output unit “High” active(2.5V)(RDS_HSLK turns over by the
external transistor. “Low” active)
22 ANT1 diversity antenna
control Antenna switch control signal output. “High” : MAIN, ”Low”=SUB
23 L ch O L channel output FM stereo “L-ch” signal output or AM audio output
24 R ch O R channel output FM stereo “R-ch” signal output or AM audio output
-
FM/AM Tuner Unit