Kenwood MDX-F1 Service Manual page 25

F G
F0554AW-A (LOADING PWB)
1
R1930
390
WRITE
PRO
CN1931 CW1931
SW1930
LOADING
5 LOADING
R1932
MINF
DISC ID 4 MINF
R1931 120
GND
3 GND
560
SW1931 TRY-
2 TRY-
TRY+
1 TRY+
LOAD
SW1932
REC
SW1933
REC HEAD
CW1903
2
PLAY 1
SW1934
2
LOD
M
PICKUP
CN1101
SW
28 28
R1100
+2.8V
3
27 27
B 27
26 26
LVVOUT
4 25 25
APCOUT
3 24 24
1 8
LDVCC
VCC 23 23 +B
DGND
22 22
2
7 DGND
GND 21 21
6 LDON R1102
20 20 72
10K
3 LDVAR
3 19 19 3
4 5
A
4
18 18 9
COM
17 17
I/V RF1
16 16
F
15 15 12
4
E
14 14 11
I/V RF3
13 13
I/V RF4
12 12
VCC
11 11 +B
AGND
10 10
MP/R
9 9 39
I/V RF2
8 8
APCIN
7 7
DGND
6 6
LVVIN
5 5
F.COIL F-
4 4 31
T+
3 3 34
5
F+
2 2 32
T.COIL T-
1 1 35
F0554AW-B
(MECHA PWB)
CN1932 CW1932 CN1402
LEAD IN LEAD IN
LEAD IN 1 1
2 2
SW1938
SLD
SLD+ SLD+
3 3 15
SLD- SLD-
M 4 4 14
SPN
6
SP- SP-
M
5 5 9
SP+ SP+
6 6
10
CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts
list). indicates safety critical components. For continued protection against risk of fire, replace only with same type and rating
fuse(s). To reduce the risk of electric shock, leakage-current or resistance measurements shall be carried out (exposed parts are
7
acceptably insulated from the supply circuit) before the appliance is returned to the customer.
H I
MD MECHANISM (MDM-99)
L1300
47uH
IC1301
C1302 C1303
(5V) 1 8 (5V) 10 1
D1 D2
7
(1.4V) 2 (1.4V)
S1 S2
(1.4V) 3 6 (1.4V)
S1 S2
5
(2.5V) 4 (2.5V)
G1 G2
D1300
1
R1301
10
IC1302
C1301
0.027
1
5 (2.5V)
1 D1
G1 4
(1.5V)
HEAD
4 (0V) R1300
DRIVER
S
3 8.2
(1.5V) 2
G2 IC1300
2 D2
(2.5V)
CN1300
+B
IC1101
R1101
RF AMP
1
0.7V 1 RF2
EFM
AGC
+B
0.8V
2 RF1
0.8V
3 RF4
DIFF
0.8V 4 RF3
DIFF
C1101
ADIP
1 1.6V 5 REFI
AGC
C1102
1.6V 6 REFO
LPF HPF
1
C1103 0.7V 7 RFADD
BIAS
0.027
R1103 1.6V 8 TCGI
390K
1.6V 9 AIN
9
1.6V 10 BIN
10
1.6V 11 EIN
11
1.6V 12 FIN
12
LOGIC
C1106
1
+3.2V
L1100
0.47uH
+B
J K
R1304
+4.8V
150
+3.2V
1
FEMMON
2
+3.2V AVCC
1.6V 3
EFMI
4
AGND
1.3V 5
5 AIN
1.9V 6
6 EIN
1.6V 7
7 TCG
1.3V 8
8 BIN
9
1.9V
9 FIN
10
+3.2V VBAT
1.6V 11
+3.2V
11 WBI
12
+3.2V VDD1
EFM OUT
13
DGND
14
TEST0
15
TEST1
16
TEST2
17
X176KO
R1200 1.4V 18
27 FODRF
100K
R1201 1.9V 19
28 FODRR
100K
R1202 1.7V 20
40 TRDRF
120K
R1203
1.6V 21
37 TRDRR
120K
ADIPI 36
R1204
1.7V 22
18 SLDRF
1.6V
82K
R1205 1.6V 23
17 SLDRR
82K
ADIPO 35
R1206 2.0V 24
8 SPDRF
1.6V
62K
NC 34
R1207 25
1.3V
ADLPFO 33 3 SPDRR
62K
1.6V
22KO 32
22KI 31
R1107
WBO 30 1.6V 560
11
TCCO 29 1.6V R1108
7
22K C1113
R1109 270P
AOUT 28 1.3V
5
22K C1114
R1110 270P
BOUT 27 1.3V
8
22K C1115
EOUT 26 1.9V R1111 270P
6
22K C1116
FOUT 25 1.9V R1112 270P
9
22K C1117
270P
+3.2V
+3.2V +3.2V
The DC voltage is an actual reading measured with a high impedance type voltmeter. The measurement value may vary depending on the measur-
ing instruments used or on the product. Refer to the voltage during RECORDABLE MD PLAY unless otherwise specified; The value shown in ( ) is
the voltage measured at the moment of STOP. The voltage followed by (REC) refers to the value during MD RECORDING.
L M
+4.8V
+3.2V
C1204 C1205
0.047 1
75
FEMON
74 1.0V
DADATA
73 0.9V
ADDATA
R1211
72 1.4V
DFCK
220
71 1.6V
BCLK
70 1.6V
LRCK
69
DGND
68
VDD3
67 R1212
1.6V
DOUT
47
66 0V
DIN
R1217
150
65
XO
IC1201
DSP
SERVO
64
EFM/ACIRC/ATRAC XI
ENCODER/DECODER 63
DGND
62
VDD1 +3.2V
61
VPO
60 3.2V
VXI
59 3.2V R1219 10K
CDBCLK
58 3.2V R1221 10K
CDLRCK
57 3.2V R1222 10K
CDDATA
56
TEST4
55 1.6V
TEST3
54 1.6V
TESO1
53
EXPORTI
52
EXPORTO
51
X700KO
0V
R1210
220
+3.2V
3.2V
IC1202
4M BIT
D-RAM
+3.2V
N O
CN1401
1 2 3 4 5
+4.8V
DIGITAL
IN
DIGITAL
OUT
72
71
70
DIGITAL
REC
3
C1209
12P
DIGITAL
IN
C1208
12P
C1207
1
R1214
10K
25
39