Philips FW-V330/21M Service Manual page 42

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
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
PB EON. SW.
PLAYBACK
HEF4952BT
EQUALISATION
2A0 2A1 2A2
IEC I IEC II
REC EON.
7730
REC EON. SW.
HEF4952BT
3A0 3A1 3A2
(HS) (REC) (CRB)
CRB
1A0
7787
REC
7780
7791
CRA
7792
NS/HS
(NS)
7622
9792 #
For Dolby version only
4794 #
PB A ADJ
1A0
MPX
#
NOM/HI SPEED
REC EON.
ALCEN
SUPPLY CTRL
1A2
MOTOR VCC
SUPPLY CTRL
1A1
NS/HS CTRL
DECK(S) SW.
2A0
4x
STATUS TO
VOLTS CONV.
HS
AD1
3A0
DATA
STROBE
9-2
PB In
PB Out
7630
REC Out
DOLBY B NR
Rec In
CXA1101M
PB B ADJ
2A2
MUTE
DOLBY
1A1
2A2
7640
RECORD AMP
REC ADJ
NJM4560D
NOM/HI SPEED
REC EON.
3A0 NS
SOLENOID
SOLENOID
SUPPLY CTRL
2x
AD2
1A0
7610
CLK
2A1
SHIFT
2A2
REGISTER
REC
HEF4094BT
NS/HS (NS)
PB Out
ATTEN
7788