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W
t-'
W
51
- 0 0 -
GAIN
SELECT
TP~
~
~ C3~
r
---1- - - - - -
- - I
r--- -- - -- -----',
READ HEAD
+
+
r - - -
1
+
+ +
+
1
1
+
+
I
,..-o---i
TR 0/2
~
All
f -
T
VOLTAGE
~
'-t-r-
1
DIFFEREN- f'- ... ZERO
I
~
PRE AMP
I
CONTROLED
AGC AMP'
I
FILTER
I
_
TIATOR
CROSSING
1-7-1
~
-
U4
i=--
~~I
f--
-;.:;.
AMP
=-r;.
=-;..-......
!
-_
DETECTOR
rnM
-~
I
I
1
I
L _______
J
r----------..J
TRACK
SELECT
r--o--+-.....
+'"l
TR 113
~
A TT
~
PRE AMP
f--
VC--t
-
U5
~ ~
f--
TR 1/3
BIAS 6V
U7
TRO/2-
" - - -
I
I
r-----l--------,
!
U6
AGC
f4 -
1
1
I
1------ --
-s"2-l
DETECTOR
I l L . ,
TIME
I
r---9
9--r-
f4 -
1
TP7
I
DOMAIN
r -
1
J,
t:J
I
FILTER
GATE
t-o--o
RD
TP3
PI
L ______ - - - - '
1
r,:==================~TP8
I
L '-----',
r:----~-l-----J
All
r--r-
LEVEL
THRESHOLD
MONO-
R48
1_
DETECT
DETECTOR
r-r-
MULTI
r-
' -
~
r-;-
AMP
r
!
TPIO
.-L~T=H=R=ES=H=OL=D~
1
CONTROL l-
I
IL-~====~
______ . __
~
~~---------------------~
TPII ___
'----+--0 LTH
RMOOE
Fig. 309
Read circuit block diagrma
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