Kenwood CT-203 Service Manual page 8

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A B
I C 1 : CXP8 254 0 - 136 Q Q1 ~4 , 15 , 16 : 2 S D 1450 ( S, T )
I C 2 : HA1 2 16 7 FB Q5 ~1 2 , 1 9 , 2 0 , 2 2 : DTC124 ES o r
I C 3 : UPC 129 7 CA 2 6 ~2 8 , 4 3 , 4 4 UN4 2 12
I C 4, 5 : TA 8 125 S 4 8 ~5 0 , 5 3 , 6 5 ~6 8
I C 6 : BA10 39 3 Q1 3, 1 4, 1 7, 1 8 : 2 SC 3 311 A( Q, R )
1
: NJ M4 55 8 D 2SC2458(Y,GR)
I C 7 2 1 , 4 5 , 4 6 , 5 8
I C 8 : S - 8 0 6D - Z Q2 3~ 2 5 : DT A124 ES o r
: BA17 81 2 T o r
I C 9 UN41 1 2
UPC7 8 12 AHF
Q2 9~ 3 6, 5 1, 5 2, 54 : 2SC184 5 ( F, E )
I C 10 : XL 24 C01 AP Q3 7~ 4 0 : 2SC200 3 ( L , K )
Q4 1, 4 2 : 2SA 992 ( F, E )
Q4 7 : 2SA 153 4 A( R, S )
Q5 5 : 2SD237 4
Q5 6, 5 9, 6 0, 6 3, 64 : 2SC324 6
Q5 7 : 2SA 15 3 5 A
Q6 1, 6 2 : 2SA 130 9 A( Q, R ) o r
2S A10 48 ( Y, GR)
Rc h ( RED ) COM( B L UE )
2
E ( YE L L OW )
COM( B L UE )
L c h ( WH I T E )
E ( GR AY )
P H
A MECHA A MECHA
KXF-W4010 : D4 0 - 1451 - 0 5 KXF-W6010 : D4 0 - 1450 - 0 5
Rc h Rc h
1 Rc h
TO CN2
PLAY HEAD 2 GND R / P HEAD
3 Lc h
L c h L c h
ERASE
3
HEAD
B B
A A
MOTOR MOTOR
+ +
– –
PHOTO RE FLECTOR PHOTO RE FLECTOR
1 A. REC
2 PLAY
1 . 5K 1 . 5K
3 GND
4 B. Cr O2
1 1. 9V 1 1. 9V
5 MOTOR
6 COM
SOL. 7 + 12V SOL.
TO CN5
4
8 M( B ) FWD REC
PLAY 9 M( A ) PLAY
C r O2 10 PHA C r O2
11 SOL
12 R. REC RVS RE C
PACK 13 PACK PACK
14 NC
15 NC
B ME CHA B MECHA
KXF-W4010 : D4 0 - 1473 - 0 5 KXF-W6010 : D4 0 - 1473 - 0 5
Rch Rc h
1 Rc h
R / P HE A D 2 GND R / P HEAD
5
TO CN3
3 Lc h
L c h L c h
4 - EH
5 +EH
ERASE ERASE
HE AD HEA D
B B
A A
MOTOR MOTOR
+ +
– –
PHOTO RE FLECTOR PHOTO RE FLECTOR
1 B. REC
2 B. PL AY
1 . 5K 1 . 5K
3 GND
4 B. C rO2
6
1 1. 9V 1 1. 9V
5 MOTOR
6 COM
SOL. 7 + 12V SOL.
TO CN6
FWD REC 8 M( B ) FWD REC
PL AY 9 M( A ) PL AY
Cr O2 10 PHB C r O2
11 SOL
RVS REC 12 R. REC RVS REC
PACK 13 PACK PACK
14 NC
15 NC
CAUTION: For continued safety, replace safety critical components only with manufacturer's
recommended parts (refer to parts list). indicates safety critical components. For continued
7 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 (exposed parts are
acceptably insulated from the supply circuit) before the appliance is returned to the customer.
C D
D 2 , 3 , 5, 6 , 1 0 ~1 2 : 1SS 133 or
1 4 ~1 7 , 1 9 , 2 1 ~30 , HSS1 0 4
33~36,46, 6 7 ~7 7
D 4 : D3SBA 2 0 F0 3 o r
REC IN
o r RBV - 4 02 L FA
D 7 : HZS6 . 8N ( B2 ) or
RD6. 8ES ( B2 )
D 8 : HZS13N ( B2 ) o r
RD13 ES( B2 )
D 9 , 2 0 : HZS5 . 6N( B2 ) or
RD5. 6ES ( B2 )
D 1 3 : HZS3 . 9N( B2 ) or
PL AY OUT
RD3. 9ES ( B2 )
D 1 8 : HZS2 0N( B ) o r
RD20 ES( B )
: HZS2 . 7N( B2 ) or
D 3 7
RD2. 7 ES( B2 )
Rc h ( RED )
X2 8 - ( G / 8 )
WH2
J 2
1
2
HEAD
PHONES 3
L c h ( WH I T E ) 4
RP EH
K X - W6 0 8 0
J 1 4
1 Rch
2 GND
3 Lc h
4 - EH
5 +EH
K X - W4 08 0
1 A. REC
2 PLAY
3 GND
4 B. Cr O2
5 MOTOR
6 COM
7 + 12V
8 M( B )
9 M( A )
10 PHA
11 SOL
12 R. REC
13 PACK
14 NC
15 NC
NORMAL: 1 . 2V
C r O2: 0V
CN5
D6 8
A.REC 1
D6 9
PLAY 2
GND 3
D7 0
1 Rch A. Cr O2 4
2 GND MOTOR 5
3 Lc h COM 6
4 - EH + 12V 7
5 +EH M( B ) 8
M( A ) 9
PHA 10
SOL 11
D7 1
R. REC 12
D7 2
PACK 13
NC 14
NC 15
CN6
D7 3
1 B. REC B. REC 1
D7 4
2 B. PLAY B. PLAY 2
3 GND GND 3
D7 5
4 B. Cr O 2 B. Cr O2 4
5 MOTOR MOTOR 5
6 COM COM 6
7 + 12V + 12V 7
8 M( B ) M( B ) 8
9 M( A ) M( A ) 9
10 PHB PHB 10
11 SOL SOL 11
D7 6
12 R. REC R. REC 12
D7 7
13 PACK PACK 13
14 NC NC 14
15 NC NC 15
DOLBY and the double-D symbol are trademarks of Dolby
Laboratories Licensing Corporation. Noise reduction circuit made
under license from Dolby Laboratories Licensing Corporation.
E F
X 2 8 - 2 7 8 x - x x A / 8
J 1
L
R177 R175 4 3K
1 2. 7V 1 2. 8V
R 15 1 / 4W
L INE MU TE 8 6 6 . 4V
C5
–
R7 1K C3 10µ50 7
10µ50
5
+
R1 6 . 4V
R5 6 . 4V
I C 7
10 0
L c h
C118
L 3 . 9K 2 / 2
100µ1 0
Q1
BUFF
6 . 4V
Q2
R6 I C 7 C6
10 µ50
Rc h
1 / 2
3 . 9K 3
R2 +
6 . 4V
R
6 . 4V
PL AY, REC
R8 1 K 1 –
10 0
C4
2 REC PAUSE
4
1 0µ50
: 4. 6V
R176
1 2. 8V
OTHER : 0V
4 3K
J 4
10 µ50
R165 4 7K C113 R161 1 8K
10 µ50
C114 R162 1 8K
J 1 2 5 . 5V
Q5 1
C115
J 1 3 5 . 5V
4 7µ16 R169
Q6
1 0 C10
CN13
10 µ50
5 . 5V
1
2
5 . 5V
C16
3
4 7µ16
4
R170
R22
Q8
180
1 0
C116
Q52
4 7µ16
C164 0 . 01
CN2
R17 3 3 . 3K R166 4 7K
R 1
H I . EQ
G 2
L 3
* W61
* Q49
- EH 4
+ EH 5 R21
Q7
* K1 18 0
C15
CN2
4 7µ16
R 1
G 2
C9
L 3
1 0µ50
Q5
A PB
* W65 C119
J 6
J 8
C120
J 9
A / B
J 5
SW Q53
Q9
CN3 B PB
C19
R 1
G
2 1 0µ50
C25
L 3
3 90P
C21
- EH 4
+ EH 5 K2
R33
4 7µ16
A. PLAY: 0 V 180
B. PLAY: 4 . 7V
C22 R34
4 7µ16
180
C20
1 2. 8V
R / P
R219 1 0µ50
R174 2 2 K
10 K
SELECT
Q10
A. PL AY
: 4. 7V
B. PL AY: 0 V
R129 15K
( 1 )
R130 15K
Q5 0
* R128 15K
REC: 4 . 9V
OTHER: 0V * R127 15K
( 2 )
( 3 )
( 76 )
( 4 )
Q29 R137
* *
4. 7K
Q31
* * R139
R220
10K 4. 7K
1 2. 8V
* Q33 * R141 I C3
L 6
W51
*
4 1 11 1 2. 8V
4. 7K
2
* Q35 * R143
* C90
12
5 3
4. 7K
1 2. 8V
( 5 ) 22 0P
Q30 R138
* * C92
1 2. 8V 10
4. 7K
22 0P 1 . 7V
Q32 * W227
* * R140
( 6 )
L 5
( 7 ) C91
4. 7K
4 1 1 2. 8V 7
2
22 0P
5 3 1 2. 8V 8
( 8 ) W223
* Q34 R142 *
*
C89
*
4. 7K
Q36 R144 W222 22 0P
* * *
4. 7K
World of free manuals
G H
PL AY, REC, REC PAUSE : 0 V OTHER: 0. 6V
L INE MUTE
R74 4 7K
6 . 4V
REC: 0 . 7V
R15
OTHER: 0V L EVEL AMP S / W
1 0K
R13
Q3
3 . 9K
R14 R68
Q4
REC: 0 V
3 . 9K 3 . 9K
OTHER : 0. 6V
R16
1 0K
6 . 4V
R85 5 . 6 K
( 9 )
R86 5 . 6 K
( 1 0 )
R87 5 . 6 K
( 8 )
R78 5 6K
1 2. 8V
C78 5 6P
R c h I C 4
1 / 2
1 . 2V 8 5
C79 1 8P
+
6
7
C80 1 8P
– 3 . 8V R 254
15
R88 1 0K
0 . 8V
R 26 R 28
1 / 4W R89 6 2K
6 . 2K 1 50K
C18
1 2. 2V R90 1 00K
0 . 022
C81 0 . 1µ 5 0
R79 1 00K
R81 2 K
( 1 )
C17
R82 2 K
( 2 )
0 . 022 R80 1 00K
R25 R27
C82 0 . 1µ5 0
6 . 2K 150K
2
R10 5 R111 R117 R123
–
3
1
1 00K 5 6K 100K 100K
+ 3 . 8V
4
I C 4 R10 4 R110 R116 R122
L c h 2 / 2
8 2K 7 5K 5 6K 5 6K
9 . 9V
R10 3 R109 R115 R121
R178
3 9K 3 9K 18K 18K
1 K 1 / 4W
3 30µ1 6 R10 2 R10 8 R114 R120
18K 3 3K 18K 33K
1 00µ1 6 R179 R101 R10 7 R113 R119
3 9K 2 7K 3 6K
1 K 1 / 4W 2 7K
1 0. 0V
R100 R10 6 R112 R118
2 7K 5 1K 2 2K 3 9 K
L c h
1 4
N. NOR N . Cr o 2 H.NOR H. C r o 2
+
3
2
–
I C5 1 / 2
R37
R35 150K
6 . 2K C27
0 . 022
L I NE
C28
0 . 022 MUTE
DR I VE
R36
6 . 2K R38 PL AY, REC
1 50K Q2 4
REC PAUSE
4 . 6V
: 4. 6V
7 Rc h
- OTHER: 0V
8
+
6
5 ( 2 2 , 2 3 )
I C 5
2 / 2
L 1 10mH
L 2 10mH
C88 2 20P
C87 2 20P
( 1 9 )
C102 0. 01 C100 0. 0 2 2
18 13 14 15
L
0 V 0 V 0 . 6V
C96
4 . 4V
PEAK ABSO
VCA
DET DET 16
0. 01
COMP. 17
0 V
R136
PRE 1 33K
T HERMAL DE T EC T ING STA O I L I Z I N G
4 . 4V
DRIVER PROT ECTIO N C IR C U I T POWER SOURCE
R135
33K
2
COMP.
0 V
C95 Q2 6
PEAK ABSO 3
VCA
DE T DE T
4 . 4V
0. 01
0 V 0 V
0 . 6V
R
9 6 5 4
C101 0. 01
HX - P RO
Q2 7 Q28
The DC voltage is an actual reading measured with a high impedance type voltmeter with a cassette
loaded at playback mode. The measurement value may vary depending on the measuring
instruments used or on the product. Bias circuit DC voltage is measured while in the record mode.
2/6/2013
I J
Q18
Q16
R70
10K
R126 10K
SYSTEM IC
I C2
4 . 5V
R91 10 K 4 . 2V
R76 5 . 6K 0 . 1V
I I L
LOG IC
4 . 5V 4 0
REC
4 . 7V 3 9 EQ
SW
0 . 6V 3 8
I N J
3 7
C
+
3 6
B I AS
LMA
M
-
A DJ
3 5
5 B I T
M
3 4 DAC
GND
2 . 6V 3 3 COUT
5 B I T
2 . 6V 3 2 B IAS ( L )
DAC
3 1
Vc c
1 2. 2V 3 0
2 . 7V 2 9 B I AS ( R)
5 B I T
2 8
5 B I T
DAC
DAC
2 7 FM
2 6 FQ
2 5 F/ Q -
LMA
2 4 GH +
2 3 GL
2 2 GP
2 1 HM REC
EQ
1 . 2V
R67 REC : 0 V
3 . 9K
OTHER: 0. 6V
REC
MUTE
L EVEL AMP SW
DR I VE
R69
Q2 5
REC: 4 . 7V 1 0K
R73
OTHER: 0V
PL AY, REC 4 7K
Q17
Q15
REC PAUSE
: 0V
R125 1 0K
RE C
OTHER: 0. 6V
MUTE
( 24 )
( 76 )
( 74 )
R149 2 2K R150 2 2K
* Q41 * Q42
R151 5 . 6K R152 5 . 6K
Q43 Q44
* *
C142 0 . 047
*
C152 0 . 047
C104 10 P 5 00
L 9
* C105 10 P 5 00 6 1
2
5
4 3
* Q37 * Q38
R145 R146
ER ASE
1 . 2K 1 . 2K
* Q39 * Q40 OSC
R147 R148
1 . 2 K 1 . 2 K