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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
9A-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
REC
7780
7791
CRA
7792
NS/HS
(NS)
7622
9792 #
For Dolby version only
4794 #
PB A ADJ
PB B ADJ
1A0
MPX
7640
#
NOM/HI SPEED
REC EON.
NOM/HI SPEED
ALCEN
SOLENOID
SUPPLY CTRL
1A2
MOTOR VCC
SUPPLY CTRL
1A1
NS/HS CTRL
DECK(S) SW.
2A0
4x
STATUS TO
VOLTS CONV.
HS
AD1
3A0
CLK
DATA
STROBE
9A-2
PB In
PB Out
7630
DOLBY B NR
REC Out
Rec In
CXA1101M
2A2
MUTE
DOLBY
1A1
7788
2A2
RECORD AMP
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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