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36
KDC-BT7539U/BT8041U
/BT8141UY/BT838U
X16-638x-xx (2/2)
AI
AH
AG
AF
AE
1
2
3
4
5
6
7
0V
5V
5V
0V
0V
5.0V
0V
54.0V
5.0V
8.8V
5.0V
54.0V
0V
5.5V
IC4
KDC-BT7539U/BT8041U/
BT8141UY/BT838U (2/2)
A
Q4
D16
D13
Q5
Q6
D6
D9
D11
D12
D7
D5
Q3
D2
D3
D8
D4
D1
Q1
S7
D19
D18
Q11
D41
ED1
ROM CORRECTION
VFD
VOLTAGE(-)
FILAMENT
TRIANGLE RED
LED SW
Left of VOL
BLUE LED SW
BLUE LED SW
Under FL
Top on FL &
BLUE LED SW
(MULTI KEY)
BLUE LED SW
131 x 23 DOT
ATT KEY
IC3
: PIC95603
IC4
: NOT USED
Q1,3-6
: DTC143ZUA
Q11
: 2SB1188(Q,R)
D1
: B30-1566-05
D2-9,11-13,16
: B30-1790-05
D18,19 : DA204U
D40
: UDZW6.8(B)
D41
: UDZW5.1(B)
∗
IC1
:
B LINE
GND LINE
(X16-638x-xx)
1/2
681
34-
FLGND
SDA
SCL
WP
VCC
GND
A2
A1
A0
3
4
2
1
100
6
5
7
8
R51
1K
C47
100P
PAN REQ
RESET
PAN DA
TA
SYS REQ
SYS DA
TA
SC CON
SRC KEY
EJECT KEY
F DC
FL GND
PAN DET
ESD GND
FL+B
ESD GND
TP19
9
8
11
10
13
12
TP8
TP10
TP9
TP11
17
15
14
16
19
18
20
TP13
TP12
TP14
TP17
TP15
TP16
TP20
TP18
F+2
1/2W
1/2W
R66 24
R64
FLGND
24
R62 18
17
R65 24
R63
1/2W
24
1/2W
R81
220
2.2
C64
21
F-2
22
VH1
PGND1
LGND1
F-1
19
20
18
SI2
13
CLK1
LA
T1
BK1
VDD1
15
16
14
NC11
NC12
SI1
12
10
11
VDD2
BK2
LA
T2
CLK2
8
9
6
7
LGND2
PGND2
VH2
4
5
2
3
100K
R61
100P
C61
F+1
1
70
12
30
R1
70
3
70
10
70
5
70
7
TP29
TP27
TP26
TP28
TP24
TP25
TP23
TP30
TP21
TP22
CP20 4.7K
TP92
TP91
31
29
15
17
71
30
32
52 51
CP21
48
20
24
47
26
70
6
23
22
33
5
3
Q11
CD RECEIVER
IC1
A
UNIT
No.
PAN5V
PAN5V-1
FDC
FDC
FL+B
FL+B
FDC
KDC-BT838U
0-10
30624MGPB53GP
2-71 YES 30624MWPB81GP
KDC-BT8041U
KDC-BT7539U
0-21
30626MJPA23GP
KDC-BT8141UY
2
1
7
7
CAUTION :
For continued safety, re place safe ty critical com-
po nents only with manufacturer’s rec om mend ed parts (refer to
parts list).
Indicates safety critical com po nents. To reduce the risk of
electric shock, leakage-cur rent or re sis tance mea sure ments
shall be carried out (ex posed parts are ac cept ably in su lat ed
from the supply cir cuit) be fore the ap pli ance is returned to the
customer.
• DC voltages are as measured with a high impedance volt-
me ter. Val ues may vary slight ly due to vari a tions between
in di vid u al in stru ments or/and units.
DTC114YUA
DTC143TUA
2SA1576A
2SC2713-F
2SC4617
2SB1188
2SB1184
2SC4081
DTA114EUA
DTA124EUA
DTC124EUA
DTC144EUA
KTA1046-P
DAP202U
DA204K
DA204U
DTA114YUA
M5237ML-CF0J