49
DEH-1400,14
No. Symbol I/O Explain
1 STIND
O
stereo
"Low" when the FM stereo signals are received.
indicator
To be pulled up to the "VDD" at 47k
Ω
.
2 FMSD
O
FM station
"High" when signals are received. To be pulled up to the "VDD" at 47k
Ω
detector
Meanwhile, 10k
Ω
should be used when taking diver FIX trigger from here
and "High: 0.9VDD or more" and "Low: 250mV or less".
(Should satisfy the diver IC specifications)
3 NL1
O
noise level-1
"High" when noise is received. Output for the RDS. GND at 47k
Ω
//1,800pF.
4 NL2
O
noise level-2
"High" when noise is received. Output for the RDS. GND at 36k
Ω
//330pF.
5 Rch
O
R channel
FM stereo "R-ch" signal output or AM audio output.
output
Add the specified de-emphasis constant.
6 Lch
O
L channel
FM stereo "L-ch" signal output or AM audio output.
output
Add the specified de-emphasis constant.
7 WC
write control
EEPROM write control. Writing permissible at "Low". Normally open.
8 SDBW
O
SD bandwidth
SD bandwidth signal output. For detection of detuning data for the RDS.
9 NC
Not used
10 VDD
power
Power supply pin for the digital section.
supply
DC 5V +/- 0.25V. Be careful about overlapping noise in the logic section.
11 DGND
digital ground
Grounding for the digital section.
12 CE2
I
chip enable-2
EEPROM chip enable. Active a "Low"
To be pulled up to the "VDD" at 47k
Ω
13 SL
I/O signal level
Received FM/AM signal level (strength) output.
Connect the specified load resistor and capacitor (10k
Ω
+ 39k
Ω
//4,700pF)
14 DI/DO
I/O data input/
Data input/Data output
data output
To be pulled up to the "VDD" at 47k
Ω
15 CK
I
clock
Clock input To be pulled up to the "VDD" at 47k
Ω
16 CE1
I
chip enable-1
AF·RF chip enable. Active at "High" To be grounded at 47k
Ω
17 NC
Not used
18 LDET
O
lock detector
Active at "Low". To be pulled up to the "VDD" at 47k
Ω
19 CREQ
I
current request
Active at "Low". To be grounded at 47k
Ω
20 NC
Not used
21 COMP
O
composite signal
FM composite signal output. r out < 100
Ω
22 VCC
power supply
Analog section power supply pin.DC 8.4V +/- 0.3V
23 LOCH
I
local high
FM local high pin. When seeking local high, apply 5V together with "LOCL".
24 FMLOCL I
FM local low
FM local low pin. When seeking local low, apply 5V to the base of the NPN
transistor with which the specified resistor is being connected to the emitter.
Keep it open in case of ordinary marketed models.
25 LOCL
I
local low
FM/AM local low pin. When seeking local low, apply 5V to the base of the
NPN transistor. Since this pin is exclusive for AM when the FMLOCL is in use,
do not drive it under FM.
26 RFGND
RF ground
Grounding for the antenna section.
27 FMANT I
FM antenna input FM antenna input. 75
Ω
. Surge absorber (DSP-201M-S00B) is necessary.
28 AMANT I
AM antenna input AM antenna input. High impedance.
Connect to the antenna through an L (LAU type) of 4.7µH.To cope with the
power transmission line hums, insert a series circuit consisting of an L
(a coil of about 100mH) + R (a resistor of 470
Ω
to 2.2k
Ω
) between the GND.
IC 3
EEPROM
28
27
FM/AM 1ST IF 10.7MHz
T51 Q51 CF51 CF52 CF53
IC1
MIXER, IF AMP, DET.
6
21
18
LDET
COMP
22
25
10
14
12 15 16
8
13
2
3
4
CF202
VDD
VCC
DI/DO
CE2
CK
CE1
SDBW
SL
FMSD
NL1
NL2
IC 2 FM MPX
AMANT
FMANT
ATT
ATT
AMRF
FMRF
IMG ADJ
RF ADJ
X901
10.25MHz
ANT ADJ
LOCL
23
LOCH
AMDET
MPXREF 41kHz
AM 2ND IF
450kHz
19
CREQ
11
DGND
1
STIND
L ch
5
R ch
9
24
NC
FMLOCL
20
17
7
NC
NC
WC
26
RFGND
-
FM/AM Tuner Unit
Summary of Contents for DEH-14
Page 4: ...4 DEH 1400 14 A B 2 2 EXTERIOR ...
Page 6: ...DEH 1400 14 2 3 CD MECHANISM MODULE 6 C ...
Page 16: ...16 DEH 1400 14 A 1 2 3 4 B C D 1 2 3 4 3 3 KEYBOARD UNIT LCD DRIVER LCD B KEYBOARD UNIT B ...
Page 24: ...24 DEH 1400 14 A 1 2 3 4 B C D 1 2 3 4 A 1 3 6 4 1 3 6 4 4 6 3 1 A A TUNER AMP UNIT ...
Page 25: ...DEH 1400 14 5 6 7 8 A B C D 5 6 7 8 25 4 6 3 1 4 6 3 1 4 6 3 1 A SIDE B A ...
Page 27: ...27 DEH 1400 14 ...
Page 29: ...DEH 1400 14 1 2 3 4 A B C D 1 2 3 4 29 CLAMP 8EJ SIDE B CONTROL UNIT C C ...
Page 36: ...36 DEH 1400 14 Grating waveform Ech Xch 20mV div AC Fch Ych 20mV div AC 45 0 75 60 30 90 ...
