
ICF-CD837
18
18
ICF-CD837
5-2. BLOCK DIAGRAM — MAIN SECTION —
T1
AM IF
RV601
BRIGHTNESS
CT1,L1
AM
TRACKING
CT4,L4
AM
FREQUENCY
COVERAGE
CT2,L2
FM
TRACKING
CT3,L5
FM
FREQUENCY
COVERAGE
VREG
L2
CV1-2
L5
CV1-3
L1
AM
FERRITE-ROD
ANTENNA
VREG
R-CH
R-CH
ANT1
(FM)
S1
BAND
BPF1
AM FM
CT4
CV1-4
CT1 CV1-1
L4
CD-R
CD-L
SEG1
I
SEG13
14
15
16
1
X402
4.19MHz
SP101
SPEAKER
(L-CH)
SP201
SPEAKER
(R-CH)
R-CH
TIME CLOCK
DETECT
+3.9V
REG
+3.9V
+3.9V
Q1
Q904
Q551
Q681
Q682
Q901
T901
JW901
F901
D901
US,MX
CND,AUS
D902
D903-906
Q902,903
+6V
+3.3V
CD+B
+11V
+6V
REG
LED
DRIVE
LED
DRIVE
VOLTAGE
CHECK
Q905
RIPPLE
FILTER
+B
SWITCH
+B
SWITCH
Q401
D401
IC402
S401
MUTE
DRIVE
Q301
Q515
+3.3V
MIX AMP
Q101,102
Q102
Q104
IC401 (2/2)
SYSTEM CONTROL
VREF
COM1
17 SEG15
14 SEG14
COM2
X401
32KHz
Q514
1
I
13
S602
RADIO ON
S604
TIME SET -/
.
S606
SNOOZE/
SLEEP OFF
S607
ALARM
SET A
S653
CLOCK
SET/
TRACK
S610
ALARM
SET B
S603
CD/
u
S601
ALARM RESET
/
x
/OFF
VR301
VOLUME
S605
SLEEP
S608
NAP
S609
TIME SET +/
>
D681
CD/RADIO
D682
NAP
S612
ALARM MODE A
S651
CD PLAY MODE
BUZZER RADIO CD OFF
S611
ALARM MODE B
NORMAL
REPEAT
SHUFFLE
SHUFFLE REPEAT
IC301
POWER AMP
AC IN
LED501
LED INDICATOR
UNIT
Z
PUSH
OPEN/CLOSE
BUZZER RADIO CD OFF
BRIGHTNESS
CONTROL
Q402
LED
DRIVER
Q501-513
• Signal path
: CD
: FM
: AM
• R-ch is omitted due to
same as L-ch
• Abbreviation
CND : Canadian model
MX : Mexican model
AUS : Australian model
Summary of Contents for ICF-CD837
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