Sanyo MCD-ZX100F - LISTENING TO THE RADIO; Tuning Radio Stations; FM Stereo Reception; Improving Radio Reception

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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
234
5
678
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
OSCREG Vcc1
Vcc2GND2
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 V
CC
= 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)
2Reg 1.31.3
Connect the AM oscilla tor coil
3 AM-OSC 4.5 4.5 between this pin and pin 4
(V
CC
1)
4V
CC
1 4.5 4.5 AM/FM-IF/MPX block V
CC
Connect the FM mix
er coil
5FM-MIX output 4.5 4.5 between this pin and pin 4
(V
CC
1)
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
(V
CC
1)
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
8Tuning indicator 4.5 4.5
Open-collector output can directly
drive LED (I
C
max = 20 mA)
Acti ve-low
Stereo
9indicator and 4.5 4.5
Open-collector output can directly
AM IF output
drive 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-AGC
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
(V
CC
1)
ILA00387
ILA00388
8
ILA00314
10
2
Rin
ILA00315
11
2
Rin
ILA00317
ILA00316
12
R
9
13