Read Sony ICF-CD553RM Service Manual online
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)
(L-CH)
SEG0 – SEG21
LIQUID CRYSTAL DISPLAY
LCD651
10 – 31
COM0 – COM3
6 – 9
S618
PLL DATA
D651, 652
(LCD BACK LIGHT)
C
TU LCH
(Page 14)
(Page 15)
INPUT SELECT SWITCH,
ELECTRICAL VOLUME,
SURROUND/TONE CONTROL
IC302
VOLUME
CONTROL
7
4
AGC
Q202
R-CH
R-CH
D102
+
+
MUTING
Q103
MUTING CONTROL
SWITCH
Q304
R-CH
LED DRIVE
Q651
REMOTE CONTROL
RECEIVER
IC651
RESET SIGNAL
GENERATOR
IC402
: 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.
R LIN
D
PLL DATA, PLL CLK,
PLL CE, COUNT
PLL CE, COUNT
(Page 15)
65 RADIO DATA
PLL CLK
66 RADIO CLK
PLL CE
64 RADIO CE
COUNT
63 COUNT
SURROUND
CONTROL
TONE
CONTROL
1
V LIN
SEL L
A
CD LCH
17
L OUT
L IN
L OUT
12
3
SP201
(R-CH)
NF L
13
9
V LIN
5
CD LIN
INPUT
SELECT
SWITCH
MIC1
MIC AMP
Q308
BUFFER
Q303
30
27
LIN
AOUT
X301
4.19MHz
XT
18
XT
19
SO
MEMO SO
13
36
SI
14
SK
12
CS
15
BUSY
11
RESET
20
LOGIC
14
SI
13
SC
21
BNFL
20
BOUTL
VOICE MESSENGER
IC303
MEMO SI
37
MEMO SK
35
MEMO CS
34
MEMO BUSY
32 33
MEMO RESET
68
VOL DAT
67
VOL CLK
77
A MUTE
80
TIMER LED
76
RESET
49
AC IN
79
CD ON
78
RADIO ON
FILTER AMP
Q104
LINE AMP
Q101
POWER
AMP
52
BUZZER
59
POWER ON
8
STBY
STANDBY
SWITCH
Q305
POWER AMP
IC301
D203
48 RC
43 KEY3
S612 – 617
44 KEY2
S606 – 611
45 KEY1
S601 – 605
46 KEY0
40 ENCODER+
41 ENCODER–
SIRCS
BUFFER
Q401
ROTARY
ENCODER
S651
X401
4.19MHz
X2
75
X1
74
X402
32.768kHz
XT2
71
AC IN
70
SYSTEM CONTROLLER
IC401 (2/2)
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)
(Page 15)
B
ANT
AC IN
DETECT
Q901
R-CH
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