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Philips VR678/02 Service Seite 95

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3-23
<— ov
A: DC, 1 V/Div, 2ms/Div
A: AC, 50mV/Div, 20us/Div
:
A: AG, 200mV/Div,
IC 7085 Pin 12
Connector 1530 Pin 2
IC 7010 Pin 12
i <— 2.8V
A: AC, 200mV/Div,
A: DC, 100mV/Div, 10us/Div
AAG, 100mV/Div, 20us/Div
IC 7400 Pin 21/22
Connector 1530 Pin 6
IC 7520 Pin 6
A: DC, 6 V/Dv, 5us/Div
A: AC, 500mV/Div, 20us/Div
A: AC, 500mV/Div, 20us/Div
Connector 1503 Pin 1
Connector 1526 Pin 9
IC 7520 Pin 43
A: AC, 100mV/Div, 20us/Div
A: AC, 200mV/Div, 20us/Div
AAG, 200mV/Div, 20us/Div
Connector 1524 Pin 2
IC 7010 Pin 14
Connector 1525 Pin 14
3-23
Block Diagram Digital
10 BOARD
MOTHER
BOARD
DECK
ELECTRONICS
_(DE)
34
C-F/R
CAPSTA
LOADING
MOTOR
;
18/1637
DECK
CONTROLLLER
1/150
ce
>
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3
==
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7085 TMP91C642
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:
CPU CORE
3/1508
17/1637
TMO2
1
7
MOTOR DIRECTION
40
Ga 1050
|
a
Ae
<—
RESET >
RST
42
59
:
7030
.
|
5
7080-A
1
10
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me
1
24
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|
|
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=
22
HPI
(Hi-P)
=
S.
-
CTL
PROCESSING
29
20
HP2
(Hl~S)
=
7080--B
SAA 1310
7/1503
1/1635
cm
18__HSC
(sP/LP
CONTROL,
tae
are
VISERASE
2
36
HSC2
HEAD
6/1503
' 2/1635
CTLGND
19
CROT
10 BOARD
at
FEP
REEL-DISC
+
23
Ty
RIGHT
i
7080-C
16
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7
15
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|
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LED
TAPE
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31
RAF
60
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(WR~AT
wl
TAPE _START
54
|
51
pan
1
1
PRO~
TEC-
TED
INIT
FMHT
(FMES) . 55
5__IPBV.
(PB)
22
|
29
TRV
_(FMEP)
50
7
ENVC
$
UAV2,
53
6
ceeedena
ANALOG
59
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FBAS/YC
47
sure
27.
FLY/ER
UNI
44
37
REFVHS
rm
as
REFSVS
Sah Cay,
SVHS~DET
45
17
32
AUTO ME
32
|
3716:
9
be
AUTO SEC
46 | |
33
SC18
48
SERIAL
PORT
t
62]
64
63
he 8
3
<
+
37
>~—
6/1637
AUDIO _LEVEL-L
24
—_
>
7/1637
=
3a
AUDIO LEVEL:
:
e—Sb0Ck
F
a
,__
STROBE
DATA
}
EDIT]
/ EDIT
TRIGGER
EDIT2
/ PREROLt
EC—CLK
EC-BUSY
BUS—iNIT
>—
SDA
1-40
SCL-F
AA
VIDE-V17307 / Druck 9

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