Kenwood DM-SE7 Service Manual page 11

U V W
Q Q
H+5V H+5V
3 7 6 3 1 5 1 5 0
+5V +5V
5.1V
+5V +5V +5V
5V
AVR
0.6V
R288
47K
( 36 )
Q34
IC22 R289 C220
100 0.33F5.5
8BIT
+
MEMORY
BACKUP
LATCH
CON.
0V
R231 100K
80 5.2V
DSUB1 80
0V
79
0V DSUB2 79
78 5.1V
SRCLAT 78
77 0.2V
DEMPH 77
76 5.1V
DLAT 76
75 5.1V
DCLK 75
T E
L 1 3 9 4 2 2 9 6 5 1 3 75
74 0V
DWDT 74
74
73 0.2V
DRDT 73
R202 100K
72 5.1V
MUTE 72
71 5.1V
VLLAT 71
R203 100K
70 4.5V
CENA 70
69 3.8V
IC20 CTXD 69
68 1.9V
CRXD 68
MAIN
67 0.2V
u-COM 63
SCLK 67
66 5.1V
SWDT 66
65 1.5V
SRDT 65
64 5.2V
4.7V
+5V +5V
63 5.2V
Q23
VLDT
62
NC
61
GND
60 4.7V
NC
Q24
59 0V
BACKV
58 0V
INISW BACKUP
57
VOLTAGE
NC
R242 100 DETECTOR
56 5.2V
KEY3 56
55 5.2V R241 100
KEY2 55
54 5.2V R240 100
KEY1 54
53
NC
52 5.2V ( 70 )
+5V +5V
51 ( 69 )
VDD
( 68
)
C225 R228
0.22 100K
R227 100K
+5V
R226 100K
R224 100K
X3 w w w
12.5MHz
3
26
.
+5V +5V
X Y Z
H+5V H+5V
+5V +5V
Q35
5.2V
5.2V 5.2V
IC15
( 46 )
EXPANDER
0V
IC 5.1V D21
RESET RESET IC
4.9V
( 43 Q25 IC14
) R292 C218 R290
1K 1u50 470
+ OUT IN
+
GND
5.0V
0V
5.1V
30
29
IC19 0.2V
S RAM
0V 4.5V
5.2V
+5V +5V
IC18
8BIT
MEMORY
LATCH
5.2V
+5V
4.5V
20
0.2V 41
D0
19
0.2V 42
D1 4.5V 4.5V
18
0.2V
43
D2
17
0V 44
STB
16
45
GND 15
46
14
47
13
48
12
4.5V 49
11
IC17
VSS
3.8V 50 2.4V
CENA
TEXT INPUT 10
1.9V 51 u-COM X1
CTXD
2.6V
52
C205 CRXD
9
0.01 53
X2
5.2V
C206 5.2V
54
8 C207
VDD +5V
0.01 55
7 5.1V 0.01
+5V VDD
RESET
R252 100K
56 6
4.5V
5
R253 100K 57
2.6V
4
R254 100K 0V 58
3 4.5V
R255 100K 0V 59 X MODE
2
5.0V
R256 100K 0V 60
4.5V
1
SCLK
x a o
4.5V y
+5V
i
+5V +5V
AA AB AC
D
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
( 42 )
( 71 )
-30V
H+5V H+5V
+5V +5V +5V
C216
47u10
+ Q36
5.2V
C259
C261
0.01
16
330u6.3 GND
+ 5.2V 17
NRSTO
23 11
R307 5.6V 18
OW20N IFM2
LRCKO
24 10
220 19
OW20N IFM2
DATAO
5.2V 25 9 0V 0V
+5V 1ISN IFM1 20
Q Q BCKO
26 8
21
1ISN IFM1 3 7 6 3
TEST0
27 IC13 7
STATE ICKSL 22
TEST1
28 6 2.4V
SAMPLING
TST1N ICLK 23
RATE
NC
29 5 2.6V
CONTROL 24
TST2N LRC1
NC
30 4 2.6V R308
RSTN BCK1 25
8FSWCKO
31 3 220
RSTN BCK1 0V 26
2 R309 8FSRDATAO
5.2V 27
D1
8FSLDATAO
32 1 220
VSS D1 28
8FSBCKO
33
VSS DIGITAL 29
REC NC
30
VDD
+5V DIGITAL
0V
+5V
CD TEXT
IC16 DECODER
8 7
TEST GND
9 6
SW1 XMODE
4.5V
5.2V 10 5 2.4V
+5V SW2 MCK
4.5V 11 4 5.2V
SCLK WFCK 22
0V 12 3 0V
( 78 ) SRDT SCOR 20
5.2V 13 2 5.2V
( 73 ) DQSY SBSO 21
1 0V
EXCK 23
5.2V 14
+5V VDD
C266
u 1 6 3
0.01 R279
D29 330
(
82 )
R281 100K
.
R282 100K
( 81 )
+5V
D30
R280
330
+5V
AD AE AF
8 9 2 4 9
C
LM431AIZ
CN2 CN3 P2
1 2 3 4 5 6 7 8 9 10 11 12 13
C264 0.01
C263 0.01
+5V
C227 0.01
-30V
+5V +5V
C251
1000P
C252
0.01
C254
0.01 13
NC
5.2V 14
+5V AVDD
5.2V
60
GND R304 15
R 2.3V
59
24K 16
NC
AGND
58
5.2V R302 5.6K
NC
57
NMUTE +5V R303 5.6K 17
VIN 2.6V
56 IC11
LRLH +5V C255 R305
18
55
1 5 1 5 0 VCO 8 DIGITAL 9 2
MMOD1
IC12 0.01 150 19 INTERFACE
54 +5V DVDD 5.2V
MMOD0
D.R.I.V.E. 0V 20
53 ( 20 ) SBSY
(REC)
HCKO
5.2V 21
52
( 21 ) PW
5.2V MCKO
5.2V 22
51 ( 22 ) SFSY
VDX +5V
0V 23
50 ( 23 ) SBCK
XO
24
49 2.4V
DGND
XI
0V
48
GNDX
47
5.2V NC
46 C256
5.2V VDD +5V
0.01
5.2V
R306
100K
+5V +5V +5V
5.2V A1
3
VDD
IC11 : LC8904Q Q23 : 2SC4177(L5,L6) or
2
GND
IC12 : KAN03 2SC4166(Y,GR)
1 IC13 : SM5844AF Q24 : 2SA1586(Y,GR) or
OUT
IC14 : PST993D-T 2SA1611(M5,M6)
0.7V IC15 : BU4094BCF Q25,34 : 2SC3311A(Q,R) or
5.2V A2 IC16 : LC89170M 2SC2458(Y,GR)
IC17 : uPD784035GC801 Q29 : UN5216 or
3
VDD
IC18,22 : HD74HC373FPEL DTC143TU
IC19,21 : HM62256BLFP-8T Q30 : UN5112 or
2
GND
IC20 : uPD784215GF506 DTA124EUA
IC23 : TA8409S Q31,32 : UN4212 or
1.7V 1
OUT
IC24,26 : TC74HCT7007AF DTC124ESA
IC25 : HD74HCT126FPEL Q33,36 : UN5212 or
m
IC27 : TC74VHC125F DTC124EUA
Q35 : 2SA1048(Y,GR) or
DM-SE7/SE7(G)/SE9(K) (2/3)
J3 D20-32 : MA111 2SA1309A(Q,R)
c o
GND
DATA
BUSY
TC74HCT7007AF L88MS33T
SGND TC74HC00AF
5
1
AG AH AI
X14-A/2
-CN1
LC89170M 2SB798-DL
8 2 9 9
3/3
TC74ACT540FS
C
X25-B/3
-CN1
3/3
D 2SA1309A TA8409S
2SC3311A
NJM062M 2SB1167
NJM2115M 2SB1168
DIGITAL
REC
FMW1 BU4094BCF
48
DGND
47
DIN4
46
DIN3
45 1.7V
DIN2
44 0.7V
DIN1
43 5.2V
4 DVDD 9 +5V 8 2 9 9
R314
42 5.1V
CL/SCLK 75
100
41 5.1V
CE/XLAT 76
C257
R313 0.01
40 0V
DI/SWDT 74
CAUTION: For continued safety,
39 100
DO
38 0.2V replace safety critical components only
SRDT 73
0V
37 5.2V with manufacturer's recommended
LD/DOSY 49
parts (refer to parts list). indicates
safety critical components. For contin-
ued 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
+5V
(exposed parts are acceptably insulat-
ed from the supply circuit) before the
appliance is returned to the customer.
The DC voltage is an actual reading
measured with a high impedance type
voltmeter. The measurement value
may vary depending on the measuring
DIGITAL LINE
instruments used or on the product.
SIGNAL LINE
GND LINE Refer to the voltage during RECORD-
+B +B LINE
ABLE MD PLAY unless otherwise
-B LINE
-B
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.
DM-SE7/SE7(G)/SE9
Y22-7210-00