Kenwood LD-K300V Service Manual page 14

BI BJ
+3.4V +3.4V
3.4V 3.4V 3.4V
RESERVED
MA[0]
1.3V 1.1V 1.4V
1.3V MA[1]
1.6V
1.5V 0.8V 1.0V
0.8V MA[2]
1.6V 1.2V
1.3V
0.6V MA[3]
MA[4]
MA[5]
MA[6]
MA[7]
MA[8]
MA[9]
RAS[1]_
RAS[0]_
IC2
UCASIN_
VDD 3
MPEG1 VIDEO
UCAS_
DECODER
MWE_
LCASIN_
LCAS_
VDDMAX
MD[15]
MD[14]
MD[13]
MD[12]
MD[11]
MD[10]
MD[9]
1.4V 1.9V 1.6V
MD[8]
MCE_[1]
3.4V
+3.4V +3.4V
+5V +5V
IC6 256K
SRAM
4.9V
3.6V 3.6V 3.8V
2.6V 2.4V 0.4V 3.7V 3.6V
BK BL
+3.4V +3.4V
C57
100u10 1.6V 1
VCOIN
+
C22 2
64 R3 56K GND
0V
0.01
0V
R52 75
63 0.2V R72
3
63
PAL MODE
R53 75
62 0.2V 30K R49
4
62
MASTER B
R54 75
61 0.2V
R48 56K 5
61
RESET B
R55 75
60 1.8V
30K 6
60
( 94 ) B7
0V
59 0.2V R56 75
7
59
( 93 ) B6
1.9V
58
8
VSS
( 92 ) B5
0V
57 0.2V R57 75
9
57
( 91 ) B4
1.7V
56 1.8V R58 75
10
56
( )
89 B3
1.5V
55 0.2V R59 75
11
55
( )
88 B2
54 0.2V R60 75
12
54 ( )
87 B1
53 R61 75
0V 13
53 ( )
86 B0
0V
R4 56K
52
14
TEST10
51 0V 1.6V
15
51
( 99 ) PXCLK
50 2.0V
16
50
+3.4V VCC
49 3.4V
3.4V
48 2.0V
48
R5 56K
3.0V
47 3.1V
47
46
VSS
45 2.0V
45
44 0V
+3.4V
44
43
4.9V
42 1.1V
42
41 0.9V
41
40 1.2V
40
39 2.2V
39
38
VSS
37 2.1V
+5V
37 4.9V
36 2.1V R51
36
35 1.6V 10K
35 Q1
R11 C18
34 0V
34
1K 1000P
33
0V
Q1
SWITCH
(RESET)
1
XTL
1.8V
2.2V 2
EXTL
20MHz 4.9V 3
MD1
R28 10K 4
0V
MD0
R27 10K
4.9V 5
MN1_
4.9V 6
+5V VCC
+5V
4.9V 7
STBY_
8
VSS
9
NC
10
NC
R25 22K
11
NC
0.3V 12
DSEL
3.6V 3.8V R26 56K 0V 13
NC
4.9V 14
IC RESET_
15
ɇ
R24 56K 4.9V 16
P47
3.4V
4.9V
+5V
BM BN
+3.4V
C17
0.01
3.4V
48
VIDEO
47
LUM
0.9V
46
CHROMA
45 4.9V
AVCC +5V
44
SLEEP
3.2V
IC10 43
TEST00
42
DIGITAL VIDEO TEST01
41
ENCODER
TEST02
(DIGITAL RGB
40
ANALOG VIDEO) TEST03
39
1.3V
GND
1.4V 38
R0 66
2.2V
37
R1 67
1.9V 1.6V
36
1.4V 1.4V
R2 68
1.6V 35
1.3V
R3 69
1.0V
3.3V
34
3.2V
R4 70
1.9V
33
R5 71
2.3V
+5V
4.9V
48 0.4V
A0 48
47 2.4V
A1 47
46
2.6V
A2 46
45
2.5V
A3 45
44 2.7V
A4 44
43 2.9V
A5 43
42 2.7V
A6 42
IC9
41 3.0V
A7 41
u-COM 40
VSS
39 2.4V
A8 39
38 0.2V
A9 38
37 2.0V
A10 37
36 3.0V
A11 36
35
0.2V
A12 35
0V
34
3.0V
4.9V
A13 34
0V 4.7V 33 1.7V
4.8V A14 33
4.9V
0.8V
BO BP
CAUTION: For continued safety, replace
safety critical components only with
manufacturer's recommended parts (refer
to parts list).
components. For continued protection
IC1 : PQ20VZ11
against risk of fire, replace only with same
IC2 : CL484-G1
IC3 : TC74HC00AFE type and rating fuse(s). To reduce the risk
IC4 : TC74HC14AFE
of electric shock, leakage-current or
IC5 : TC74HCT7007AFE
resistance measurements shall be carried
IC6 : HM62256BLFP12T or
out (exposed parts are acceptably insulated
HM62256BLFP-8T or
from the supply circuit) before the appliance
HM62256BLFP-7T
IC7 : HM514260CLJP-7
is returned to the customer.
IC8 : KAR05
IC9 : HD6433256A57F
IC10 : RF5C292
IC11,12 : TC7SHU04FU
The DC voltage is an actual reading
Q1 : UN5212 or
measured with a high impedance type
DTC124EUA
voltmeter. The measurement value may
vary depending on the measuring
D1,2 : MA110
instruments used or on the product. Refer
to the voltage during LD PLAY unless
otherwise specified; The value shown in (
) is the voltage measured at the moment of
STOP. The voltage followed by (CD) refers
to the value during CD PLAY.
SIGNAL LINE
GND LINE
+B
-B
+5V +5V
4.9V 2.2V
2.1V 1.6V 1.4V 1.6V 0.9V 0V 3.0V 1.6V 1.9V
MICRO
CODE
1.6V
(ROM)
IC8
2.0V 2.2V
1.2V 2.1V 0.2V 1.8V 1.8V 1.8V 1.8V 1.8V 1.9V 1.1V
+5V +5V
4.9V
4.9V
4.9V
IC7
1.8V
1.7V
4M
DRAM
LD-K300V
Y22-7123-00
BQ BR
indicates safety critical
+5V
1.9V 1.7V
1.9V
+5V
C5 0.1
LD-K300V(M) (3/4)