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