Kenwood X-SE7 Service Manual page 6

A B
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IC8 VOLTAGE
MODE:RECORDING
CRO2 CRO2
PIN NORMAL PIN NORMAL
METAL METAL
1 4.4V 10 1.69V
2 1.9V 3.2V 11
12.9V
1 3 4.4V 12
4 2.4V 3.6V 13 2.64V 4.1V
5 1.9V 3.2V 14 1.7V 2.9V
6 2.6V 4.1V 15 2.3V 3.4V
7 16 4.38V
12.9V
8 17 1.8V 2.9V
9 0V 18 12.9V
MECHANISM (D40–1574 –05)
R/P/E HEAD HEAD PCB
2 +L (RED)
5 Lch
Lch
-L (ORG)
R/P HEAD 4 GND
-R (YEL)
+R (GRN)
Rch
3 Rch
-E (BLU)
ERASE 2 EH GND
HEAD
+E (BRN)
1 EH
GND (WHT)
-Rch
(YEL)
+Rch
(GRN)
+ERASE
(BRN)
EARTH
(WHT)
-ERASE
+Lch
(BLU)
(RED)
3
-Lch
(ORG)
4
Rch 6 MOTOR +(CW)
TRAY
MOTOR
Lch 5 MOTOR -(CCW)
4
3 COM
S8
2 OPEN
S7
1 CLOSE
S1
5
1 REV REC
Lch
Rch S2
MOTOR
+12V
2 METAL
GND
S3
3 CrO2
S4
PHOTO REFLECTOR 4 MODE
5 COM
6 MOTOR –(CCW)
7 MOTOR +(CW)
8 12V
9 GND
S5
10 HALF
11 SOL
SOL
12 HALL OUT
S6
6
13 FEW REC
CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to
parts list). indicates safety critical components. For continued protection against risk of fire, replace only with same type
7
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
(X28-2932-71) (C/5)
R219 C221
220K 0.01
12.9V
EH
L3
ABSO. PEAK
6 1
DET. DET.
2
STABILIZING THARMAL DETECTING
4 3
POWER SOURCE PROTECTION CIRCUIT
COMPARATOR
ABSO. PEAK
DET. DET.
HX
L4
6 1
2 R220
220K
4 3
+
C222
0.01
CN12
EH 1
EH GND 2
Q44
Rch 3
PLAY/REC
GND 4 RELAY SELECT.
Q44
+
K1
Lch 5
Q31,32
PLAY
MUTE
Q33
Q31
REC:0V
PLAY:12.9V
Q32
REC:4.4V
PLAY:0V
REC:5.0V
PLAY:0V
R214
10K
R213
10K
IC6
12.3V
MOTOR
DRIVE
CN6 R44 1K
MOTOR + 6
0.6V
MOTOR – 5
+
4
COM 3
OPEN 2
CLOSE 1
CN2
R1 100
REC R 1 43
METAL 2
R3 100
CrO2 3 42 R54
47K
R2 100
MODE 4 46
COM 5
Q6 R8
4.7K
MOTOR – 6
5.0V
12.2V Q8
11.6V
MOTOR + 7
41
12V 8 CPM
CONT.
GND 9
R5 100
HALF 10 39
SOL 11 Q9 12.3V
SOLENOID
HALL OUT 12 61
CONT.
R6 100
40
REC F 13 38
Q7
R10
3.3K
E F
Q45
ERASE OSC
C230
10P
EH
L9
R224
6 1
10
5 2
1/4W
Q46
4 3
VCA
C233
10u16
7.3V
R230
Q41
10
VCA
1/4W
EH CONT. REC:4.8V
12.6V
7.9V
IC8 12.9V
R234 Q42
DOLBY
10 Q43
HX PRO
+
REC:0V
Q48 Q47
Q47,48
+
BIAS
CONT.
9.8V
IC7
1.3V
(1/2)
C203 4
10u16 1 3.7V
3
+
2
5
+
R203 R205 R207
160 6.2K 150K
+ 0.7V
C207
PB EQ
0.022
C208
0.022
R206
+
R204 6.2K R208
160 0.7V 150K
7
3.7V
C204
6
10u16
8
+ IC7
9
1.3V (2/2)
CN11
12 11 10 9 8 7 6 5 4 3 2 1
12 11 10 9 8 7 6 5 4 3 2 1
CN5
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.
World of free manuals
G H
(X28- ) (B/5)
Q27
L1 MPX
NC
4 5
6.5V
3 2 1
Lch
61
62
6.5V
R107
1.5K 63
R158 18K
64
6.4V
C105
1u50 65
+
C103 +
66
R105 10u16
6.2V 7.0V
39K
67
7.0V C143
NORMAL:0V 1u50 68
CRO2/METAL:5.0V
+
69
70
71
+
7.0V
72
C154
1u50 6.2V 73
+
+
R106 7.0V
74
39K
CN4 CN10 C104
10u16
LEV. R 75
( 45 ) 15 15
+
REC MUTE
C106 + 6.4V 76
( )
74 14 14 14
LINE MUTE
1u50
( 75 ) 13 13 13 6.2V
C212 C144
OSC 3300P 1u50
77
( 59 ) 12 12
+
OSC ATT
78
( )
76 11 11 R209 C211
PLAY. L 1.5K 3300P
R108 79
10 10
1.5K 6.5V
400/12.5k 80
( 77 ) 9 9
120/70
( 78 ) 8 8 R210
PLAY. R 1.5K
7 7
A. GND
6.5V
6 6
3 2 1
D. GND
5 5
S. DATA 4 5
Rch
4 4 4
S. BUSY
3 3 3
NC
D22
5V
2 2
L2
MPX
MUTE +B
1 1 1
R162
25.8V
12K
CN3 CN9
Q28
REC. R Q30
Q29
10 10
BIAS. R
9 9 29
13V
8 8
BIAS. L
7 7 32
R164 22K
CLK
( 48 ) 6 6 39
R160 120K
DATA
( 51 ) 5 5 40
ST
( )
52 4 4 41
RESET
3 3 42
REC. L
2 2 46
LEV. L
( 44 ) 1 1 50
5.1V
I J
1/7/2013
Q23
+
C127 R121
+ 2.2u50 1.1K
+ +
+ +
R113
+ +
REC:0V
22K
6.5V
VREF
EQ
RECT
VOL
1A
DOLBY
B/C NR
BIAS
LMA
VR3
+
SBIT
SBIT
–
VR2 DAC
DAC
E. VOL
VR1
GND
GND
VR1
E. VOL
SBIT
VR2 DAC
SBIT
–
DAC
VR3
+
LMA
REF
DOLBY
1A B/C NR
EQ
RECT
VOL
VREF
6.5V
REC:0V
R114
22K + +
+ +
+ +
R130
C128 R122
47K
2.2u50 1.1K
+
+
Q24