Pioneer DEH-3730MP Service Manual page 60

1
- FM/AM Tuner Unit
A
AM ANT
FMRF
1 ATT
FM ANT
3
ATT
FMRF
B
RF adj
ANT adj
No. Symbol I/O Explain
C
1 AMANT I
2 RFGND
3 FMANT I
4 VCC
5 SL O signal level
6 CE2 I
7 NC
8 CE1 I
9 CK I
D
10 DI I
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
20 RDS_LOCK O RDS lock
E
21 RDS_HSLK O RDS high speed
22 AUDIOGND
23 L ch O L channel output
24 R ch O R channel output
F
60
1
2
7 6 13
IC 3 EEPROM
5.0V
OSC
LPF
IC 1
3.3V
MIXER, IF AMP
T51
CF52
2 12 15 22 16 4
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
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
chip enable-2 Chip enable for EEPROM "Low" active
non connection Not used
chip enable-1 Chip enable for AF•RF "High" active
clock Clock
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-3730MP/XN/EW
2
3
5 10 9 8 11 14 18 19 20 21
IC 5
5V 3.3V
IC 4
3.3V 2.5V
2.5V
3.3V
17
3
4
Rch
24
IC 2
2.5V
Lch
23
DET, FM MPX,
RDS DECODER
(DSP-201M-S00B) is necessary.
4