Block Diagram -Tuner Section - Sony CDX-L300 Service Manual

CDX-L300/L460X
3-3. BLOCK DIAGRAM — TUNER SECTION —
TUNER UNIT
TU601
CNJ601
2
FM_ANT
(ANTENNA)
1 AM_ANT
AM_DX/LCL
FM/AM_OSC
13
FM/AM_VCC
•
25
SD/ST_IND
FM POWER
CONTROL 12 FM_VCC
TU+B
Q605,606
AM POWER
CONTROL 9 AM_VCC
Q603,604
(Page 21)
A
CD
CDL 14
SECTION
16 18
L-CH
R-CH 17 R-CH
DET_OUT 24 17
21
2
1
36
11
PLL
12
IC601
13
3 8 LCL
11 15 FM_VCO
16 AM_VCO
D_OUT 6 17
D_IN 4 22
6 18 FM_CP
FM_VT
CK 5
21
14 19
AM_VT VT
CE 3 23 PLL_CE
20 AM_CP
19 2
OSC-IN OSC
IF_COUNT 20 10 SEEK 1
XO
13 IFC
11 24
MONO XI
X601
10.25MHz
S_METER 21 28
22 26
( FREQUENCY )
SW801
SELECT
FM 200k
32
AM 10k
FM 50k
AM 9k
L460X L300
ELECTRONIC VOLUME
IC401
LF OUT 5
L5
L1 LR OUT 4
Q102
L2
MUTE
R2
RF OUT 33
R-CH
RR OUT 34
CE
DI
CL
MUTE
CONT
Q401,402
SYSTEM CONTROL
IC801 (2/3)
VOL_CLK ATT 7
VOL_DO BEEP 8
53
VOL_CE P.ON
A_ATT 6
59
ACC IN
PLL_DI
TEST 33
PLL_DO
PLL_CLK
49
AMP_ON
TU_ON 52
46
BU_IN
S_METER
SD_IND
DST_SEL 15
FM_ON
14
AM_ON
U_COM+5V
22 22
POWER AMP
IC101
5
12
3
9
11
7
Q101
16 AUX-IN
MUTE
4 STBY
R-CH
22 MUTE
R-CH
D402
DELAY BATT
ACC
CHECK
Q902
AMP POWER
CONTROL
BATT
Q911,917
Q909
BACK-UP CHECK
Q903,904,D906,907
TUNER+8V REG
TU+B F901
Q912,913,D913
10A
COM+8V REG
COM+8V
Q918,919,929,D923
U_COM+5 V REG
BATT
Q920,D930,D999
PJ401
L
AUDIO OUT REAR
R
R-CH
CNP501
1 FL+
9
FL–
2 RL+
10 RL–
4 FR+
12
FR–
3 RR+
11 RR–
7 ACC
15 TEST
5 AMP REM
6
ANT REM
8
GND
17
19
18
16 +B (BATT)
• Signal path
:FM
:AM
:CD
• R-ch is omitted due to
same as L-ch.