- 6 -
IC101 LA1824 (Tuner)
PARTS LIST
BATTCUT P.W.BOARD ASSY
REF.NO.
PART NO.
DESCRIPTION
70
614 332 8650
ASSY,PWB,BATTCUT(Only initial)
SW102
645 074 9476
SLIDE SWITCH,ST.MONO
645 074 9131
CXH WAFER 2P,STSW
645 074 9162
HOUSING WAFER 2P,BATTCUT
BATTERY A P.W.BOARD ASSY
REF.NO.
PART NO.
DESCRIPTION
75
614 332 8629
ASSY,PWB,BATTERY A(Only initial)
645 075 0243
BATTERY SPRING -
BATTERY B P.W.BOARD ASSY
REF.NO.
PART NO.
DESCRIPTION
76
614 332 8636
ASSY,PWB,BATTERY B(Only initial)
645 075 0243
BATTERY SPRING -
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
FM
RF
AM
RF
AM
MIX
FM
MIX
FM
OSC
AM
OSC
REG
Vcc1
Vcc2
GND2
GND1
DECODER
PHASE
COMP
PILOT
DET
TRIG
ST-SW
VCO
DET
DET
AM-IF
S-METER
FM-IF
AGC
FF
FF
FF
ST
LED
TUN
LED
Pin Descriptions and Quiescent Voltage
at VCC = 4.5 V
Pin
Quiescent
number
Function
voltage (V)
Equivalent circuit
Remarks
AM
FM
1
AM-RF input
1.3
1.3
Connect the AM antenna coil
between this pin and pin 2 (Re g)
2
Reg
1.3
1.3
Connect the AM oscilla tor coil
3
AM-OSC
4.5
4.5
between this pin and pin 4
(VCC1)
4
VCC1
4.5
4.5
AM/FM-IF/MPX block VCC
Connect the FM mixer coil
5
FM-MIX output
4.5
4.5
between this pin and pin 4
(VCC1)
6
GND1
0
0
AM/FM-IF/MPX block GND
Connect the AM mix er coil
7
AM-MIX output 4.5
4.5
between this pin and pin 4
(VCC1)
ILA00307
1
2
ILA00308
2
ILA00309
3
4
ILA00385
4
5
ILA00386
7
4
IC BLOCK DIAGRAM & DESCRIPTION
Pin
Quiescent
number
Function
voltage (V)
Equivalent circuit
Remarks
AM
FM
Acti ve-low
8
Tuning indicator 4.5
4.5
Open-collector output can directly
dri ve LED (I C max = 20 mA)
Acti ve-low
Stereo
9
indicator and
4.5
4.5
Open-collector output can directly
AM IF output
dri ve LED (I C max = 20 mA)
AM-IF signal is output in
AM mode
10
FM-IF input
1.3
1.3
Rin = 330
11
AM-IF input
1.3
1.3
Rin = 2 k
AM-A GC
12
output and
0.7
0.2
Internal load resistance
FM signal
R = 16.6 k
meter output
Connect the FM detector coil
13
FM-DET
4.5
4.5
between this pin and pin 4
(VCC1)
ILA00387
ILA00388
8
ILA00314
10
2
Rin
ILA00315
11
2
Rin
ILA00317
ILA00316
12
R
9
13
