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HCD-RV7/RV8
35
35
[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
• Waveforms
– BD Board –
1
IC103
qg
(RFAC) (CD Play Mode)
1.05
±
0.3 Vp-p
Approx.
250 mVp-p
2
IC103
qh
(FE) (CD Play Mode)
Approx.
350 mVp-p
3
IC103
qk
(TE) (CD Play Mode)
0.75
±
0.1 Vp-p
4
IC103
wk
(RFDC) (CD Play Mode)
– VIDEO Board –
ea
IC504
1
(BCK)
3.3 Vp-p
474 ns
es
IC504
3
(LRCK)
2.7 Vp-p
22.7
µ
s
ed
IC504
qh
(MCLK)
3.4 Vp-p
59.5 ns
ef
IC303
1
(VIN), IC505
7
(CSIG)
(Video CD Play Mode)
480 mVp-p
H
eg
IC303
6
(VOUT)
(Video CD Play Mode)
600 mVp-p
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