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BLOCK DIAGRAM
Line-In
ATTEN
7710
Playback
SOURCE SEL
Head
HEF4952BT
1A0 1A1 1A2
Rec current
Rec/Pb
Head
BIAS SYM
HD SW.
REC
BIAS ADJ
Erase
Head
Bias
Erase
OSCILLATOR
REC
CRB
NOTE:
# For Non-dolby version only
Only 1 channel is presented.
MicroProcessor Control / Communication lines
Direct / Indirect Control lines from Shift Registers
9-2
7720
PRE-AMPLIFIER
AN7318S
ALCEN
ALC
7740
PLAYBACK
PB EON. SW.
HEF4952BT
EQUALISATION
2A0 2A1 2A2
IEC I
IEC II
REC EON.
#
7730
REC EON. SW.
HEF4952BT
3A0
3A1
3A2
(HS) (REC) (CRB)
1A0
7787
ALCEN
REC
1A2
7780
1A1
7791
CRA
2A0
7792
HS
NS/HS
(NS)
7622
3A0
9792 #
For Dolby version only
4794 #
PB A ADJ
PB B ADJ
1A0
MPX
7640
RECORD AMP
NOM/HI SPEED
REC EON.
NOM/HI SPEED
SOLENOID
SUPPLY CTRL
MOTOR VCC
SUPPLY CTRL
NS/HS CTRL
DECK(S) SW.
4x
STATUS TO
VOLTS CONV.
AD1
CLK
DATA
STROBE
9-2
PB In
PB Out
7630
DOLBY B NR
REC Out
Rec In
CXA1101M
2A2
MUTE
DOLBY
1A1
7788
2A2
REC ADJ
NJM4560D
REC EON.
3A0
NS
SOLENOID
SUPPLY CTRL
2x
AD2
1A0
7610
2A1
SHIFT
2A2
REGISTER
REC
HEF4094BT
NS/HS (NS)
PB Out
ATTEN
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