Kenwood DPX-4020 Service Manual page 18

AE AF
X14-/X16-
CN1
1
1/2
(X25-8970-00)
A CN1
18 17 16 15 14 13 12
2
+33.5V
S19
E.Q
3
S4
S.A
S20
4
DSP
S11
ATT
5
S15
DISP
6
7
CAUTION : For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts list).
Indicates safety critical components. To reduce the risk of electric shock, leakage-current or resistance measurements shall be carried out
!
(exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer.
• DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations between individual instruments
or/and units.
AG AH
11 10 9 8 7 6 5 4 3
CP5
100K
+33.5V
S2 S3
1
S5 S1 S6
2 FUN
S8 S13 S10
3 FM+ VOL+
S12 S9 S14
4 AM- VOL-
S17
S16
5 MD EJ
S18 S7
6 SRC
AI AJ
ED1
2 1
Q5
+5V
+33.5V
Q4
R20
22K
+5V +5V
L1
4.7uH
KR5
+B
KR4
5V
0V
CP7
1K
17
17 VFD DATA
18
NC
19
19 VFD CLK
20
20 VFD LAT
KR3
5V
RESET
0V
D1
21
RST
Q1
RST: 0V
10K
21
10K CP6
1K
22
KR2
22 VFD BK
23
NC
24
24 PON ON : 5.0V
25
NC
26
26 SC REQ
27
27 MC REQ
KR1
28
28 SC CON
ACTIVE : 5.0V
R12 1K
29
KR0 29 REMOCON
30
KR0 KR0
31
KR1 KR1
32
KR2 KR2
KR3
CP4
1K
KR4
CP3
KR5
KR0 100K
AK AL
R29
100K
C6 R28
2.2 2.7K
C13
Q2
10P
C12 R24
10P 47K
2.5V
D9
C8
10P
0V
2.5V
2.5V
0V-4.2V
0V-4.8V
+B
Q3
R21
2.2 5.0V
CP8
+B
1K
5.0V
+B
X1
16MHz
0V 0V
5V
0V
16MHz
5V
0V
0V-4.2V
IC1
5V
0V
PANEL u-COM
5V
0V
5V
0V
5V
0V
D2 D3 D4 D5
CP2
1K
CP1
100K
AM AN
IC1 : MN101C10AAL
IC2 : BA3830F
Q1,5 : DTC114EUA
Q2 : 2SK3018
Q3 : UMC3N
R25
Q4 : FMCA4
220K
C5
D1-5,9 : DAN202K
100P
D6,7 : B30-1564-05
D8 : B30-1575-05
2.5V
D10,11 : HZM5.6N(B2)
IC2
+B B LINE
CP9
1K
64
ANA3 64
63
ANA2 63
62
ANA1 62
61
VREF-
60
NC
59
NC
58
NC
57
NC
56
NC
55
NC
54
NC
53
NC
52
NC
51
NC
50
NC
49
NC
DPX-4020
(2/2)