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SCHEMATIC DIAGRAM (TUNER)
U2101
ANT
GND
AGC
GND
VT
+B
1
2
3
4
5
6
FM-ANT
FM.GND
CN201
ANT.
TERMINAL
R2103
FM
10K
75ohm
Q2140
KTC3875
0
R2120
3.3K
0
R2141
0
10K
R2140
68
[1/4W]
B2101
AM-ANT AM.GND
Q2451
11.7
0
KRA107S
0.1
CN203
11.9
GND
1
12.0
AM_ANT
2
C2457
1
C2456
0.01
4.2
0
0
3.4
1.6
0.9
0.9
3.2
24
23
22
21
20
19
XOUT
NC
VSSA
AOUT
AIN
PD
IC241
LC72121M
XIN
VSSX
CE
DI
CLK
DO
1
2
3
4
5
6
1.6
0
0.2
0.2
0.4
4.4
0.1
0
0.2
12.0
FM 98MHZ
VOLTAGE=
(UNIT:V)
AM 999KHZ
CN682
VDD LED2 LED1 CLS D.GND OPN
CN681
VDD
3
VDD
8
TW_LED2
2
TW_LED2
7
TW_LED1
1
TW_LED1
6
(TO LED)
CLOSE_SW
5
D.GND
4
CN683
OPEN_SW
3
SLED+
2
SLED+
SLED+
2
1
SLED1
SLED-
SLED-
1
(TO FRONT)
(TO MECHA ASSY)
IF
OSC
Q2201
KTC3193
7
8
2.4
0
XF221
C2152
0.047
TP11(H)
TP12(E)
R2458
10K
R2455
220
[1/4W]
4.9
2.8
D2452
MTZJ3.0B
1.5
0
0
1.6
0
0
0
4.8
1
2
0.6
18
17
16
15
14
13
VDD
FMIN
AMIN
VSSD
SD
IFIN
FM
MONO
AM
IF_REQ
IO0
NC
3
7
8
9
10
11
12
4.8
0
0.7
0
4.9
0.1
5.8
R2459
10K
Each precaution in this manual should be followed during servicing. Components identified with the IEC symbol
components in which safety and performance can be of special significance. When replacing a component identified by
with the same ratings of resistance, wattage or voltage that are designated in the parts list in this manual. Leakage-current or resistance measurements must be made to determine that
exposed parts are acceptably insulated from the supply circuit before returning the product to the customer.
- 40 -
XF222
9.6
0
1.7
0
XF231
0V-TP1
5.8
2.3
2.3
6.8
1
2
3
FM IF
AM MIX
REG
AM IF
IC231
0V-TP2
OSC BU
AM OSC
AFC
AM RF
24
23
22
4.4
5.8
2.3
2.3
5.3
6.8
R2153
100K
C2151
12P
R2303
4.7K
0
2.8
C2505
100;16
C2512
C2506
C2504
27P
1000P
0.01
0
2.4
2.4
0
0
0
3.0
0
2.4
0
0
4.9
4.9
0
12
11
10
9
8
7
6
5
4
3
XOUT
T5
T4
T3
T2
T1
CIN
FLOUT
Vssa
Vdda
IC251
LC72722
XIN
Vddd
Vssd
T6
T7
SYNC
RDS-IN
DO
CL
DI
13
14
15
16
17
18
19
20
21
22
2.4
0.4
0
4.9
0
0
0
0
0
4.2
0.2
0.2
C2513
C2515
22P
0.01
C2516
100;16
R2519
10K
PRODUCT SAFETY NOTICE
and
mark in the parts list and the schematic diagram designated
! ! !
! ! !
and
0
6.1
Q2310
KTC3875
0
R2331 C2332
47K
0.01
C2306
R2306
1
2.7K
C2322
XF233
1000P
C2321
C2305
0.47
1
5.8
5.8
4.7
2.3
0
0
4.3
6.8
6.8
0
0.7
4.8
5.8
4
5
6
7
8
9
10
11
12
GND
SD
ST
FM DET
VDD
MUTE
FM/AM
MONO
LA1844ML
AM
FM
PILOT
AGC
DET OUT
DET OUT
PLL IN
MPX IN
CLL OUT
RCH
LCH
21
20
19
18
17
16
15
14
13
C2319
4.2
2.0
2.9
2.0
2.3
2.2
3.2
3.2
0.033
2.2
0
0.7
C2317
4.7;50
C2320
0.033
C2307
R2308
10;50
22K
C2308
R2309
0.018
39K
R2712
100K
2.4
2.4
0
0
R2812
2
1
100K
L2503
MPXIN
VREF
270U
R2901
100
CE
SYR
23
24
0.2
0
0
+12V
5.6V
HP-MUT
D2451
1SS355
R2464
1K
R2461
1K
R2462
1K
R2463
1K
, use only the replacement parts designated, or parts
- 41 -
R2301
270
[1/4W]
R2311
270
[1/4W]
C2904
0.1
JW201
HP.GND2
SH.GND
Y
HP.GND2
HP.GND2 HP.GND2
HEADPHONE
HP.GND2
CN291
Y
HP.GND2
OUT
IN
HP.GND2 HP.GND2
L2903
Y
10U
HP.GND2 HP.GND2 HP.GND2
HP-L
15
HP.GND
14
HP-R
13
HP-MUTE
12
HP-SW
11
+12V
10
+5.6V
9
TU-R
8
7
TU.GND
6
TU-L
TU-DO
5
TU-CE
4
TU-DATA
3
TU-CLK
2
NC(GND)
1
CN241
(TO MAIN)
This is a basic schematic diagram.
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