ICF-CD553RM
16
16
6-3.
BLOCK DIAGRAM – MAIN Section –
+12V
POWER AMP
B+
µ
-COM +3.3V
+3.3V
+5V
CD +3.3V
CD +6V
R-CH
SP101
(L-CH)
LIQUID CRYSTAL DISPLAY
LCD651
10 – 31
6 – 9
S618
PLL DATA
D651, 652
(LCD BACK LIGHT)
TU LCH
AGC
Q202
R-CH
R-CH
D102
+
+
MUTING
Q103
MUTING CONTROL
SWITCH
Q304
R-CH
LED DRIVE
Q651
: CD PLAY
: FM/TV (2
–
6CH)
: TV (7
–
13CH)/WEATHER
SIGNAL PATH
: MESSAGE PLAY
: MIC INPUT
R-CH : R-ch is omitted due to same as L-ch.
PLL DATA, PLL CLK,
PLL CE, COUNT
PLL CLK
PLL CE
COUNT
CD LCH
SP201
(R-CH)
MIC1
MIC AMP
Q308
BUFFER
Q303
X301
4.19MHz
18
19
13
14
12
15
11
20
VOICE MESSENGER
IC303
FILTER AMP
Q104
LINE AMP
Q101
STANDBY
SWITCH
Q305
POWER AMP
IC301
D203
S612 – 617
S606 – 611
S601 – 605
SIRCS
BUFFER
Q401
ROTARY
ENCODER
S651
X401
4.19MHz
75
74
X402
32.768kHz
71
70
D653
TIMER
D401
D402
+5.4V
MOTOR DRIVER
B+
D303
+6V
RADIO/VT
B+
+3.9V
REGULATOR
Q953
+3.3V
REGULATOR
Q954
+5V
REGULATOR
Q951, 952, 955
+6V
REGULATOR
Q956 – 958
CD ON
SWITCH
Q301
RADIO ON
SWITCH
Q302
RECT
D903 – 906
RECT
D901, 902
T901
POWER
TRANSFORMER
(AC IN)
ANT
AC IN
DETECT
Q901
R-CH