28
28
HCD-SV2D
HCD-SV2D
7-4. SCHEMATIC DIAGRAM — MAIN SECTION —
•
See page 41, 42 for IC Block Diagrams.
•
See page 39 for Waveforms.
•
See page 45 for IC Pin Function Description.
NO.
VOLTAGE CHART
IC501
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VOLT
4.9
4.9
4.9
0
0
0
0
0
–
5.0
0
0
0
4.8
0
0
NO.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
VOLT
4.9
0
0.3
0
0.2
4.9
0.2
5.1
–
5.0
5.0
5.0
2.8
3.8
3.8
0.4
NO.
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
VOLT
4.9
5.0
0
5.0
3.3
2.4
0
3.0
2.8
–
0
4.9
4.9
0
4.9
3.2
NO.
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
VOLT
3.4
4.8
0.3
0
4.9
4.9
0
0
4.9
0
4.9
0
0
4.9
4.9
4.9
-32.4
-32.9
-38.6
NO MARK : FM
< > :TAPE REC
4.5
0
8.8
17.0
10.8
11.0
9.9
16.3
17.8
18.0
0
17.8
5.1
5.1
0
0
0.7
9.9
4.1
4.7
5.0
5.0
5.0
5.0
9.9
4.1
9.9
4.7
2.6
0
4.9
0
0
0
0.6
0.6
4.7
9.2
5.3
0
5.2
5.2
9.6
0
0
5.2
5.2
0
0
5.1
0
0.3
12.4
0
4.9
12.3
0
12.4
12.4
0
0
5.0
0.3
11.3
5.7
10.6
10.3
0.2
0.7
0.7
0.6
0
5.0
5.0
4.9
5.0
4.9
4.2
4.9
4.9
2.6<-7.0>
2.6
<-7.0>
2.6
<-7.0>
0<0>
0<0>
0<0>
0<0>
0<0>
0<-14.9>
0<-14.9>
0<-14.9>
0<-0.7>
0<-0.7>
9.5 <0.4>
9.6
<9.0>
0<0.8>
0
0.7
0
0.7
1.7 <0.8>
0
0
0
0
1.2
2.2
1.7
2.3
1.2
0
0
1.2
2.0
7.1
1.4
2.0
1.2
0
0
0
0.7<0>
0.7
<0>
0
5.0
5.0
5.0
0
5.0
5.0
4.9
4.9
4.3
4.3
4.3
4.3
5.0
5.0
0
0
5.2
4.9
4.9
2.5
2.5
2.5
2.5
2.5
2.6
2.5
0
2.3
2.5
2.5
2.5
2.6
2.5
2.5
2.5
2.6
2.6
2.6
2.5
2.6
5.2
DOWNLOAD
PORT
TO TUNER PACK
SPEAKER
IMPEDANCE
USE 6
Ω
IC503
IC502
IC401
IC402
IC201
IC301
IC102
TV IN
+
L
R
–
–
+
MAIN BOARD
HEAD
(PLAYBACK/ERASE)
L-CH
R-CH
REC/PB
HEAD
(Page 37):E3,SP,TH
(Page 38):US MODEL
50V
222
222
2.7K
2.7K
0.18
0.18
0.18
0.18
E3,SP,TH
R581
1
*
US:4.7k
E3:15k
SP,TH:91k
BA15218F-E2
RESET SWITCH
EPROM
TAPE REC/PB AMP
MUTE
MUTE
Q215
REC DETECT
Q201-Q205
REC/PB SWITCH
Q210, Q211
MUTE
INVERTER
+9V REG
SWITCH
LED DRIVE
Q504-506
+5V REG
SWITCH
+5V REG
SWITCH
CURRENT
DETECT
+10V REG
+9V REG
-33V REG
RELAY DRIVE
MIC AMP
ECHO
Q401, Q402
MIC MUTE
Q403
BUFFER
BUFFER
BUFFER
MUTE SWITCH
SWITCH
POWER
CONTROL
POWER
CONTROL
MIXER AMP
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299