Kenwood KRF-X7775D Service Manual page 26

P Q
(X08-3XXX-XX)
1
IC36,37
INVERTER (33MHz OSC)
2
C608 1000P
53
BMSTR
R625 1 54
+B VDD
55
CS
R626 10K 56
SBTS
57
GND
58
58
58 WR
59
59
59 RD
60
GND
R627 1
61
+B VDD
62
C609 1000P
GND
63
REDY
64
SW
65
CPA
C610 1000P
66
+B
VDD
R628 1
67
3
+B VDD
68
GND
R629 10K
69
ACK
70
70 MS0
71
71 MS1
72
GND
73
GND
74
MS2
75
C612 1000P MS3
76
FLAG11
3.3V R641 1 77
+B VDD
78
FLAG10
R630 100
79
79 FLAG9
R631 100 80
80 FLAG8
81
GND
82
82 82 DATA0
R632 100
82
83
83 R633 100 83 DATA1
4
83
84
84 R634 100 84 DATA2
84
C613 1000P
R642 1
85
+B VDD
86
86 R635 100 86 DATA3
86
87
87 87 DATA4
R636 100
87
88
88 88 DATA5
R637 100
88
89
GND
90
90 90 DATA6
R638 100
90
91
91 91 DATA7
R639 100
91
92
92 DATA8
R643 1 93
+B VDD
5
C614 1000P
94
GND
R640 1 95
+B VDD
96
C611 1000P
96 DATA9
97
97 DATA10
98
98 DATA11
99
GND
100
100 DATA12
101
101 DATA13
102
NC
103
NC
104
104 DATA14
6
3.3V
+3.3V
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.
7
R S
C607
9P
IC37 IC36
C606 R624
9P 1K
C605
1000P
3.3V
+B
R622 1
+B +3.3V
37
IC31
DSP
+3.3V +3.3V
T U
IC45 4
GND
5
3
6
DIGITAL
2
INPUT
7
BUFFER
1
8
VCC
3.3V
+3.3V +3.3V
3.3V
+B
IC35
C112
INVERTER 47P
(DSP REQUEST)
C114
47P
C113
15P
208
NC
207 R672 10K
IRQ2
R671 100
206
IRQ1 206
205 R670 100
IRQ0
204
GND
203
NC
R669 100
202
201
NC
C629 1000P
201
FLAG3
R668 1
200
VDD +B
R667 100
199
FLAG2 199
R666 100
198
FLAG1 198
197
FLAG0
196
GND
195
195
ADDR0 195
194
194
ADDR1 194
193
193
ADDR2 193
C628 1000P
192
VDD +3.3V
R664 1
191
VDD +3.3V
190
190
ADDR3 190
189
189
ADDR4 189
188
188
ADDR5 188
187
GND
186
GND
185
185
ADDR6 185
184
184
ADDR7 184
183
183
ADDR8 183
C627 1000P
182 R663 1 3.3V
VDD +3.3V
181
GND
180
180
ADDR9 180
179
ADDR10 179
178
ADDR11 178
177
GND
C626 1000P
R662 1
176
VDD +B
175
ADDR12 175
174
ADDR13 174
173
ADDR14 173
R661
172
VDD +B
171 1
ADDR15 171
C625
170
ADDR16 170
169 1000P
ADDR17 169
168
GND
167
GND
166
ADDR18 166
165
ADDR19 165
164 C624 1000P
ADDR20
163 R660 1
VDD +B
162
ADDR21
161
ADDR22
160
ADDR23
C623 1000P
159
GND
158 R659 1
VDD +B
157 R658 100
RESET 157
C622 1000P
+3.3V
DOLBY and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.
Noise reduction circuit made under license from Dolby Laboratories Licensing Corporation.
V W
R119
R121 1K 4.7K
80
IC6
DIR
R111 1K R110 10K
15 14
3 AUTO DET RX4
R127 10K
13
R112 10K RX OPT
16
RX3
P/S
12 C108 0.1
R113 1K
17 RX2 12
2 FS96 DET
11 C109 0.1
R114 1K 18
RX1 11
1 ERF
10 C107 0.1
19
R108
AVSS
LRCK
1
9 3.3V
20
AVDD +B
SDTO
21
8 R107 18K
BICK
R
7 R106 1K
PDN
C105 0.1
R105 C104
1.5K 12.288MHz 22P
6
XTO
22
DAUX
C102 C103
23 5 1000P 22P
MCKO2
XTI
24
R125 100
MCKO1 4
V/TX 4
C110 0.01 R102 100
3
R115 1K 25 C101
6 CS 0.1
3
TX OPT
R116 1K 26 TVDD +B
10 CCLK 2
DVSS
R117 1K 27
9 CDTI
R118 470 R101 10
28 1 3.2V
8 CDTO DVDD +B
58
71
59
IC42 IC41
IC39
(BOTTOM VIEW)
IC41,42
LATCH CONT.
+B
R734
1
3.3V
+3.3V
3.3V
+B +B
SDRAM (DSP) SDRAM (DSP)
IC34 IC33
26 25 25 26 25
VSS VDD +B VSS VDD
27 24 24 27 24
189 A4 A3 190 189 A4 A3
28 23 23 28 23
188 A5 A2 193 188 A5 A2
29 22 22 29 22
185 A6 A1 194 185 A6 A1
30 21 30 21
184 A7 A0 195 184 A7 A0
31 20 20 31 20
183 A8 A10 48 183 A8 A10
32 19 19 32 19
180 A9 A11 174 180 A9 A11
33 18 18 33 18
NC CS 70 NC CS
34 17 17 34 17
47 CKE RAS 42 47 CKE RAS
35 16 16 35 16
37 CLK CAS 43 37 CLK CAS
36 15 15 36 15
46 UDQM WE 44 46 UDQM WE
37 14 14 37 14
NC LDQM 46 NC LDQM
38 13 13 38 13
+B VDDQ VDDQ +B +B VDDQ VDDQ
39 12 12 39 12
133 DQ8 DQ7 128 86 DQ8 DQ7
40 11 40 11
127 DQ9 DQ6 132 88 DQ9 DQ6
41 10 10 41 10
VSSQ VSSQ VSSQ VSSQ
42 9 42 9
122 DQ10 DQ5 126 87 DQ10 DQ5
43 8 43 8
123 DQ11 DQ4 118 107 DQ11 DQ4
44 7 44 7
+B VDDQ VDDQ +B +B VDDQ VDDQ
45 6 45 6
121 DQ12 DQ3 117 101 DQ12 DQ3
46 5 46 5
111 DQ13 DQ2 116 98 DQ13 DQ2
47 4 47 4
VSSQ VSSQ VSSQ VSSQ
48 3 48 3
108 DQ14 DQ1 113 97 DQ14 DQ1
49 2 49 2
109 DQ15 DQ0 112 96 DQ15 DQ0
50 1 50 1
VSS VDD +B VSS VDD
+3.3V
3.3V
X Y
DIGITAL
MUTE
IC38
R126
2.2
+B
IC39,40
R665
8BIT LATCH
100
(DSP SUB u-COM)
+B
IC40
+3.3V
+B
190
R719 100
193 195
194 153
195
48
174
59
70
82
42
83
43
84
44
86
46
+B +B
82
84
87
88
83
90
90
91
+B
R721 100
91 179
R722 100
100
165
104
92 R723 100
169
+B
58
+3.3V