(Front) - Sanyo DC-BM300 Service Manual

SCHEMATIC DIAGRAM (TUNER)
XF211 IC211
LA1186N
1 2 3 1 2 3 4 5 6
C2105
0.01
CN202
FM
75 Ohm
AM
LOOP
8.5
0
R2454
Q2451
KRA107M 10K
C2457
1;50-P
C2456
0.01
4.2
0 0 3.4
2.0 0.8 0.8 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
2.0
0 0.3 0.1 0.2 4.3 0.9
0 0.4 0 11.1
This is a basic schematic diagram.
R2204
220K
2.3
7 8 9
C2114 R2201
5P XF221 220 Q2201
KTC3195
R2205
R2202
330
R2105 C2111
1.5K 1000P
C2109 SVC342
100P
D2153
C2152
820K
R2148
1SS133
D2456
R2455
220
1.9 0
0 1.9 0 4.7 0
18 17 16 15 14 13
VDD FMIN AMIN VSSD SD IFIN
FM MONO AM IF_REQ DIST NC
7 8 9 10 11 12
4.8 0 0
5.2
0.9
5.6
0.6
0.9
R2460 R2459
10K 10K
1SS133
D2453
FM 98MHZ
VOLTAGE= (UNIT:V)
AM 999KHZ
- 26 -
XF222
9.2
0
0
1.6
0
33
2.1
FM IF
OSC BU
L2151
24
MWANT
4.7
5.1
L2153
560P MWOSC
PRODUCT SAFETY NOTICE
Each precaution in this manual should be followed during servicing. Components
identified with the IEC symbol ! ! ! in the parts list and the schematic diagram
designated components in which safety can be of special significance. When
replacing a component identified by , use only the replacement parts
! ! !
designated, or parts 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.
XF233
T2002
C2306
1;50
XF231
C2322
1000P C2305
0.47;50
6.2 4.0 5.0
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
AM MIX REG AM IF GND SD ST FM DET VDD MUTE FM/AM MONO
IC231 LA1844ML
AM FM PILOT
AM OSC AFC AM RF AGC DET OUT DET OUT PLL IN MPX IN CLL OUT RCH LCH
23 22 21 20 19 18 17 16 15 14 13
6.3 2.1 2.1 0.6 0.5 2.6 2.6 2.1 1.3 1.3 5.3
0.9 0 0.9 0
C2317
4.7;50
C2307 R2308
33K
10;50
C2308 R2309
0.018 33K
D2451
1SS133
R2464
R2461
R2462
R2463
- 27 -
R2306
2.7K
C2321
1;50
R2301
100
R2311
100
C2319
0.022
C2320
0.022
R2712
120K
R2812
120K
(TO AMP)
+5.6V
10
A.GND
9
TU_R
8
TU_L
7
+8.5V
6
1K
TU_DO
5
1K
4 TU_CE
1K
TU_DATA
3
1K
TU_CLK
2
GND
1