HCD-RV7/RV8
3535
C
MAIN BOARD (3/4)
CN304
[3.3]
[3.3]
[8.2]
[8.2]
[0]
[∗] {2.9}
<<2.9>>
[1.5]
{∗} <<∗>>
(CAPSTAN)
CAPSTAN MOTOR
CONTROL SWITCH
TAPE SPEED
(NORMAL)
TAPE SPEED
(HIGH)
ROTATION
DETECT
SENSOR (DECK A)
ROTATION
DETECT
SENSOR (DECK B)
+3.3V
+3.3V
CAPM
−
CAPM+
CAPMH/L
ATRGM+
TRGMGND
BTRGM+
S1001
(DECK A PLAY)
S1002
(DECK B PLAY)
S1003
(DECK A HALF)
S1005
(DECK A REC)
S1006
(DECK B HALF)
S1009
(DECK B REC)
C1001
33
10V
PM902
(DECK B)
PM901
(DECK A)
+3.3V
+3.3V
7-15. SCHEMATIC DIAGRAM – SW Board –
•Voltages are dc with respect to ground under no-signal
conditions.
[]: TAPE PLAY (DECK A)
{ } : TAPE PLAY (DECK B)
〈〈 〉〉 : REC
∗
: Impossible to measure
(Page 40)
• Waveforms
– BD Board –
1 IC103 qg (RFAC) (CD Play Mode)
1.05 ± 0.3 Vp-
Approx.
250 mVp-
2 IC103 qh (FE) (CD Play Mode)
Approx.
350 mVp-p
3 IC103 qk (TE) (CD Play Mode)
0.75 ± 0.1 Vp-
4 IC103 wk (RFDC) (CD Play Mode)
– VIDEO Board –
ea IC504 1 (BCK)
3.3 Vp-
474 ns
es IC504 3 (LRCK)
2.7 Vp-
22.7 µs
ed IC504 qh (MCLK)
3.4 Vp-
59.5 ns
ef IC303 1 (VIN), IC505 7 (CSIG)
(Video CD Play Mode)
480 mVp-
H
eg IC303 6 (VOUT)
(Video CD Play Mode)
600 mVp-
H
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
1
3
9
4
2
2
9
6
5
1
3
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
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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