Read Sony HCD-XB66 / HCD-XB660 / LBT-XB66 / LBT-XB660 Service Manual online
– 31 –
– 32 –
7-4.
BLOCK DIAGRAM
– MAIN Section (1/2) –
HCD-XB66/XB660
MIC LEVEL
DBFB CONTROL
SWITCH
Q202
ATTENUATOR
CONTROL SWITCH
Q102, 103
SPEANA
MIXING AMP
IC231
SWITCHING
Q201
RESET SIGNAL
GENERATOR
IC302
C
(Page 30)
R-CH
05
FM/AM TUNER UNIT
VOLUME
CONTROL
CPU INTERFACE
BASS BOOST
CONTROL
CIRCUIT
INPUT
SELECT
SOUND
CONTROL
CIRCUIT
GRAPHIC
EQUALIZER
CONTROL
CIRCUIT
69
R-CH
FEED BACK
SWITCH
Q203
R-CH
R-CH
COMMAND
F OUT2
KEY
IN2
KEY
OUT2
OUT2
BUF
OUT2
VOL
IN2
IN2
+
R-CH
R-CH
R-CH
R-CH
R-CH
D291
+
62
RV760
MIC AMP
IC760 (1/2)
PHONO EQ
AMP
IC101
MIC AMP
IC760 (2/2)
MUTING
Q204
RESET
SWITCH
Q301
INPUT SELECT SWITCH,
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
IC201
IN-2B
71
IN-2A
33 32 34
DATA
CLOCK
LATCH
39
BUF IN2
29 28 30
PORT-B
PORT-A
PORT-C
44 45 3
COM-DOUT
INPUT-CHANGE
COM-CLK
427-LAT
10
X2
X301
5MHz
X302
32.768kHz
11
X1
13
XT2
14
XT1
BB12,
BB22
REC
2A
REC-L
E
(Page 35)
D
(Page 35)
(Page 35)
(Page 36)
(Page 36)
SPEANA
DATA, CLK
POWER
CD-POWER
REC
2B
• SIGNAL PATH
: CD PLAY
: TAPE PLAY
: RECORD
: TUNER (FM/AM)
: MIC INPUT
+5V
R-CH
61
45
65
64
MUTING CONTROL
SWITCH
Q231, 232
44
VOL
OUT2
BB
IN2
IN2
43
42
100
2
20
15
6
38
J101 (2/2)
VIDEO/MD
(AUDIO) OUT
R
L
J761
MIX MIC
ST-L
FM ANT
FM ANT
AM ANT
AM ANT
ST-R
ST-MUTE
STEREO
TUNED
ST-DIN
ST-DOUT
ST-CLK
ST-CE
ANTENNA
FM 75
Ω
AM
41, 40
DBFB-H/L
CD-POWER
POWER
IIC-CLK
IIC-DATA
CLK
DATA
68
ST-CE
65
ST-CLK
66
ST-DIN
67
ST-DOUT
69
TUNED
70
STEREO
72
ST-MUTE
STK-MUTE
TA-MUTE
F-RELAY
99
SW-F-CON
AC-CUT
RESET
1
RESET
J
(Page 34)
RELAY
I
(Page 33)
STK-MUTE
H
(Page 33)
FEED BACK
G
(Page 33)
L-CH
SYSTEM CONTROLLER
IC301 (3/3)
56
55
F
K
L
46
98
CD-L
A
(Page 30)
FUNCTION SWITCH
IC102
PB-L
B
(Page 28)
R-CH
INH
A B
13
6
10 9
J101 (1/2)
R
VIDEO/MD
(AUDIO) IN
PHONO IN
L
R-CH
R-CH
ATTENUATOR
(–5dB)
Q101
R
L
14
12
15
11
54
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