Kenwood DPX-4020 Service Manual page 17

U V
0V 7V 7V
7.3V
7V
0V
3.2V
POWER AMP
7V
+B
D401
Q404
47K
47K
+B
+5V
10
+8V +8V
5.0V(0V)
IC5
8.0V 8 7 0V 47K
VCC GND 72
5.0V(0V) 9 6
SEL SEL 47K
Q403
4V 10 5 4V
4V 11 4 4V
4V 12 3 4V
4V
4V 13 2 4V
R
4V 14 1 4V
4.0V
G
4V
L
FRONT/REAR
+8V
C310 4V
0.22u50
Lch
43
C311
4V 4V 0.22u50
8.0V
8
IC3
0V
4V 4V
C211 0.22u50
6
5.0V(0V)
C210 0.22u50
Rch
5.0V(0V)
Q402
+8V
+B
+5V
+8V
+7.5V
TC4066BF BA3129F BA3830F
W X
PRE OUT
FRONT REAR
J3
C215 C315 C217 C317
2200P 2200P 2200P 2200P
R206 R306 R209 R309
IC7
47K 47K 47K 47K
Q201 Q301 Q202 Q302
0V
C420
1 D402 D403
7V
D405
Q406 Q405
+5V
MUTE
D404
43
+8V
+8V
4V
4V
4.0V
+8V
33
1 NC
CDR 32 4V
2 OUT LF FL
CDR OUT
3 31 4V
OUT RF FR
CDGND
4
30 4V
CDL OUT
OUT LR RL
5
CDL 29 4V
IC2
6 OUT RR RR
NC 28
7 NC
MPX/E.VOL
L401
NC 27
8 VDD +8V
8.0V
NC
26 4.7uH
9
GND
NC 0V
10 25
AM/IF NC
4V
11 24
NC SDA 36
23
SCL 38
5V
CP41
0V
3.5V 100
0V
Q407
R402
22K
4.7K R403
4.7K
22K
Q401
R652 100K
5.0V(0V)
0V
IC10
C605 R658
4
D602 0.01 470
5
GND
C606 R659
5.0V(0V) 6 3 5.0V(0V)
0.01 470
5.0V(0V) 7 2 5.0V(0V)
R651 100K
1 5.0V(0V)
8
+B VDD
5.0V
MUTE DRIVER
+B
+5V +5V
+8V
+7.5V
LB1641 M5237ML
Y Z
FRONT L
ANT
WH1
FRONT R
A2
1 ANT CONT
RF GND
2
FM ANT IN
P. CON
+8V
3 ACC ACC
R6
AM ANT IN
22K
4
R7 OSC GND
GND
L2
2.2K
4.7uH
5
+B FM +B
Q3
FM+B
R5
L3 6
Q2
2.2K +B AM +B
R4
7
22K OSC GND
8
OSC GND
9
AM+B
OSC GND
C15 10 (X87-3040-00)
OSC GND
11
L4 100P
Q4 VT
4.7uH 12
+B PLL +B
13
AM IFOUT
R1 100 14
36 SDA
R2 100 15
38 SCL
16
DIG GND
Q1 L8
17
+5V VDD 5V
18
IF2 GND
CN3
5 5
Lch
4 4
REV
L5
Rch
4.7uH 19
3 3
+B IF2 +B
Rch
2 2
FWD
Lch
20
1 1
AUDIO OUT
21
75 SD
22
L6
3 S-METER
4.7uH
23
+B IF1 +B
24
IF1 GND
TUNER
CN5
64 1 MS MODE
IC1 : CXA2560Q
63 2 F/R
67 3 MTL Q1 : KRC103S
62 4 MUTE
65 5 DOLBY ON/OFF
66 6 MS OUT
+8V 7 +B 8V
IC1 : MN101C15FC-FCP
Rch 8 OUT-R
IC2 : TDA7407
9 A GND
IC3 : TC4066BF (N)
Lch 10 OUT-L IC4 : M65849BFP
IC5 : BA3129F
IC7 : TA8263BH
IC8 : LB1641
IC9 : PST9135NR
IC10 : TC7W02FU
IC11 : M5237ML
Q1,713,720,903
55 CN2 : 2SC4081
54 22 D OUT Q2,3 : CPH3105
Q4 : FMG1A
21 SW2
Q101 : 2SB1443
Q102 : DTC144EK or
20 SW1
UN2213
R109 100
Q201,202,301,302
38 19 CLK
: DTC143TK or
R110 100
36 18 DATA UN2216
CD MECHA
Q401 : DTC124EUA or
17 NC
DXM-1062
UN5212
16 NC
(X92-4130-00)
Q402,715,718
+5V 15 VDD : FMC2A
14 D GND Q403,404,701,703
: DTC144EUA or
13 AMUTE R
UN5213
61 12 AMUTE L
Q405-407
60 11 MRST
: DTA114EUA or
59 10 MSTOP
UN5111
+8V 9 A8V Q601,709,711
: DTC114YUA or
8 8 Lch
UN5114
7 AGND
Q602,705,708
6 6 Rch
: DTA124EUA or
57 5 LO/EJ
UN5112
58 4 MOTOR Q702 : FMW1
Q706,710
+7.5V 3 SERVO 7.5V
: 2SB1277 (Q,R)
Q707 : 2SA1037K
2 SERVO GND
Q712,716,724
56 1 SW3 : 2SB1548 (P)
Q714 : 1MD16A
Q717 : 2SD1766
Q901 : FMC3A
Q902 : 2SB1446
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
AA AB
WHT GRN
(X14-6710-XX)
8 9
REAR L
WHT/BLK GRN/BLK
MODEL UNIT
7 10 R646 R647
NAME No.
GRY/BLK VIOL/BLK
6 11 DPX-4020 (K) 0-11 NO YES
REAR R
GRY VIOL DPX-4020(M) 0-21 YES NO
5 12
BLU PNK/BLK
EXT.
4 13
CONT
BLU/WHT
3 14
RED ORG/WHT
ILLUMI
2 15
BLK YEL
BU BU
1 16 BATT
DC CORD
(E30-4939-05)
PB LEVEL
VR2
10K
C8 R12
0.01 1K
4.16V
C16 R6
33u10 180 4.06V 31
PB FB2
+
4.06V 32
PB R IN2 DOLBY OFF : 0.4V
33
B : FF, REW : 0V
PB GND
PLAY : 4.05V
20
MS MODE
0V
4.06V FWD : 0V
19 REV : 4.84V
DR SW
34
METAL ON : 0V
PB F IN2
18 OFF : 4.84V
C5
TAPE SW
W12 33u10 35 MUTE ON : 4.77V
VCT
17 OFF : 0V
+
W14
IC1
4.04V MUTE SW DOLBY ON : 4.43V
16 OFF : 0V
4.03V 36 NR SW
PB REF 15
4.06V 37 NR MODE DPSS : 4.94V
PB F IN1 14 PLAY : 0V
38 DPSS : 0V MS OUT
PB GND PLAY : 2.9V
13
0V
4.1V MSTC
12 R10 C20
G1FB
39
PB R IN1 33K 5600P
4.06V 4.12V
C15 R5
11 R9 C17
W13 33u10 180
40 G2FB
PB FB1
3.6K 0.47
+
4.06V
C7 R11 4.1V
C9 DOLBY OFF : 0.4V
B :
0.01 1K 4.1V 10P
VR1
C6
10K
47u10
PB LEVEL
+ R13
4.7
+5V
D1,706 : MA3056-M or
HZM5.6N (B2)
D101,203,306
: 1SR154-400 or
D1F60
D102 : 02CZ4.3-X
D201,301,302
: MA3068 or
HZM6.8N
D204-206,303-305,708,
711,712 : 1SR139-400 or
AM01Z
D401-404,601,602
: DAP202U or
MA142WA
D405 : DAN202U or
MA142WK
D701 : RM10ZLF
D702 : MA8068-M
D703 : 02CZ11-X
D704 : MA3068-M or
HZM6.8N (B2)
D705 : DAN217
D707,710
: M1F60
D709 : DAN202K or
MA152WA
D713 : MA8056-M
D714 : 02CZ5.6-Y
D715 : 02CZ7.5-X
D801,803 : HZM6.8FA or
FTX6.8E
D802 : MA3068WA or
STZ6.8N
D901 : 02CZ18-Y
D902 : RD6.2F (B2)
SIGNAL LINE
X25-
+B B LINE
CN1
2/2
A
(1/2)
AC AD
CN2
3 Rch
2 GND
1 Lch
CN4
1 MS MODE
2 F/R
3 MTL
4 MUTE
DOLBY
5
ON/OFF
6 MS OUT
7 +B 8V
C23 C24
8 OUT R
0.22 0.047
9 A GND
Q1
10 OUT L
22K
22K
DPX-4020