Sanyo DC-BM500 Service Manual page 20

SCHEMATIC DIAGRAM (TUNER)
XF201
2.9
1 2 3 1
R2111
10
CN201
ANT
TERMINAL
FM
75ohm
AM
LOOP
10.5
0
Q2451
KRA107M
10.5
2.0
0
PRODUCT SAFETY
24 23
NOTICE
XOUT NC
IC241
Each precaution in this
XIN VSSX
manual should be followed
1 2
d u r i n g s e r v i c i n g .
Components identified with 2.0
0
the IEC symbol ! ! ! in the
parts list and the schematic
d i a g r a m d e s i g n a t e d
components in which safety
c a n b e o f s p e c i a l
s i g n i f i c a n c e . W h e n
replacing a component
identified by , use only
! ! !
t h e r e p l a c e m e n t p a r t s
designated, or parts with the
same ratings of resistance,
wattage or voltage that are
designated in the parts list
in this manual. Leakage-
c u r r e n t o r r e s i s t a n c e
measurements must be
made to determine that
e x p o s e d p a r t s a r e
acceptably insulated from
the supply circuit before
returning the product to the
customer.
This is a basic schematic diagram.
IC211
TA8176S
1.5 0.7 5.4 5.4 1.9 5.4 5.0 5.3 5.2
0 0
0 0 0 0 0 0 0 0 0 0
2 3 4 5 6 7 8 9 10 11 12
C2188
0.01
XF221
C2123
0.01
C2105
R2104
100K
1000P
C2101
1000P
L2101
0.7
10.5
R2455
220
C2457
1;50-P
C2456
4.2
0.01 1.9 0 C2480
0 3.4
0.01
0 1.9 0 4.7 0
0.8 0.8 3.2
22 21 20 19 18 17 16 15 14 13
VSSA AOUT AIN PD VDD FMIN AMIN VSSD SD IFIN
LC72121M
CE DI CLK DO FM MONO AM IF_REQ DIST NC
3 4 5 6 7 8 9 10 11 12
0 0
0.3 0.1 0.2 4.3 0.9 5.2
0 0.6 0 11.1 5.6 4.8
0.9
0.6
0.9
R2460 R2459
10K 10K
D2453
1SS133
R2464
CHASSIS GND
FM 98.1MHZ
VOLTAGE=
AM 1000KHZ
- 22 -
R2201
100 XF222
L2151
D2153 MWANT
SVC342
L2153
C2152
MWOSC
470P
D2451
1SS133
1K
T2002
000
R2306
XF231
C2306
1;50
2.7K
C2322
XF233
1000P C2305
0.47;50
6.2 4.0 5.0
2.1 2.1 2.1 0 5.0
6.6 4.7 5.0 5.1 6.3 0 2.3
0.7
1 2 3 4 5 6 7 8 9 10 11 12
FM IF AM MIX REG AM IF GND SD ST FM DET VDD MUTE FM/AM MONO
IC231 LA1844ML
OSC BU AM OSC AFC AM RF AGC AM FM MPX IN PILOT RCH LCH
DET OUT DET OUT PLL IN CLL OUT
24 23 22 21 20 19 18 17 16 15 14 13
4.7 6.3 2.1 2.1 0.6 0.5 2.6 2.6 2.1 1.3 1.3 5.3
5.1 0.9 0 0.9 0
C2317
4.7;50
C2307
R2308
R2303
47K
33K
10;50
C2308 R2309
0.022 27K
Q2900
KTC3198
- 23 -
C2321
1;50
R2301
100
R2311
100
C2319
0.022
C2320
0.022
R2712
8.2K
R2812
8.2K
(TO PREAMP)
CN202
+5.6
8
FRT_GND
7
B
6
+8.5
5
+12
4
R2900
TU_L
3
680
2 GND
1 TU_R
D_GND
1
D_CLK
2
D_OUT
3
TU_CE
4
TU_DI
5
RDS
6
(TO FRONT)
CN203