Pioneer DEH-2050MPA Service Manual page 14

1
- FM/AM Tuner Unit
A
1 2
B
No. Symbol I/O Explain
C
1 ANT
2 RFGND1
3 RFGND2
4 RFGND3
5 RFGND4
6 VCC
7 SLIN
8 IFOUTA O
D
9
IFOUTB O
10 DGND
11 REFINA
12 REFINB
O
13 LDET
14 VDD
15 DI
16 CK
17 CE1
E
18 DO O
19 CE2 O
20 SLOUT O
F
14
1
2
3 4 5 6 7 8 9
ATT
ATT
TANK
ATT RF
I Antenna Input Antenna input. 75 ohm. Surge absorber is necessary.
Series circuit including an inductor and a resistor is connected with RF
ground for the countermeasure against the ham of power transmission line.
RF Ground Ground of R.F. block
RF Ground Ground of R.F. block
RF Ground Ground of R.F. block
RF Ground Ground of R.F. block
Power Supply Power supply for Analog block. D.C 8.4 V + 0.3 V
(performance isn't guaranteed besides 8.4 V)
I Signal Level Input Input signa level from BE_IC
IF Output IF signal output (F.E.output)
IF Output IF signal output (F.E.output)
Digital Ground Ground of Digital. block
I Reference Signal Input reference signal for PLL part with FE_IC
I Reference Signal Input reference signal for PLL part with FE_IC
Lock Detector PLL lock detecter output "High" active
Power Supply Power supply for Digital block. D.C 3.3 V + 0.2 V
Data In Data input (not sending data in tuner reception operating in noise
I
being output)
CK Clock data input(not sending data in tuner reception operating in noise
I
being output)
Chip Enable-1 Chip enable for FE_IC "High" active
I
Data Out Data output
Chip Enable-2 Chip enable for EEPROM "Low" active. in power ON/OFF, please turn CE2
into "High" (= VDD).
Signal Level Output Output of FM/AM signals level (D.C.)
DEH-2050MPA/XN/EC
2
3
10 11 12 13 14
VCO LFP
MIX / IF / PLL
LFP
3
4
15 16 17 18 19 20
IC2
EEPROM
IC1
CF
4