Pioneer DEH-P80MP/XN/EW Service Manual page 74

Multi-cd/dab control high power cd/mp3/wma player with rds tuner
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1
- FM/AM Tuner Unit
A
AM ANT
FMRF
1
ATT
FM ANT
3
ATT
FMRF
B
ANT adj
No. Symbol
I/O Explain
C
1 AMANT
2 RFGND
3 FMANT
4 VCC
5 SL
O signal level
6 CE2
7 WC
8 CE1
D
9 CK
10 DI
11 LDET
O lock detector
12 OSCGND
13 ROM_VDD
14 DO
O data out
15 DGND
16 NC
17 VDD_3.3
18 RDS_CK
O RDS clock
19 RDS_DATA
O RDS data
E
20 RDS_LOCK
O RDS lock
21 RDS_HSLK
O RDS high speed
22 AUDIOGND
23 L ch
O L channel output
24 R ch
O R channel output
F
74
1
2
7 6
IC 3 EEPROM
5.0V
OSC
IC 1
3.3V
MIXER, IF AMP
RF adj
T51
2
12
15
22
16
I
AM antenna input
AM antenna input high impedance AMANT pin is connected with
an all antenna by way of 4.7µH. (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
I
FM antenna input
Input of FM antenna 75Ω Surge absorber
The power supply for analog block. D.C 8.4V ± 0.3V
power supply
Output of FM/AM signals level
I
chip enable-2
Chip enable for EEPROM "Low" active
I
write control
You can write EEPROM, when EEPROM write control is "Low".
Ordinary non connection
I
chip enable-1
Chip enable for AF•RF "High" active
I
clock
Clock
I
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 output
digital ground
Ground of digital block
non connection
Not used
The power supply for digital block. 3.3V ± 0.2V
power supply
Output of RDS clock(2.5V)
Output of RDS data(2.5V)
Output unit "High" active(2.5V) (RDS_LOCK turns over by the
external transistor. "Low" active)
Output unit "High" active(2.5V)(RDS_HSLK turns over by the
lock
external transistor. "Low" active)
audio ground
Ground of audio block
FM stereo "L-ch" signal output or AM audio output
FM stereo "R-ch" signal output or AM audio output
DEH-P80MP/XN/EW
2
3
13
5
10 9 8
11
14
18 19 20 21
IC 5
5V
3.3V
LPF
CF52
CF51
IC 4
3.3V
2.5V
2.5V
3.3V
4
17
3
4
Rch
24
IC 2
2.5V
Lch
23
DET, FM MPX,
RDS DECODER
(DSP-201M-S00B)
is necessary.
4

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