Block Diagram - Philips FW-C355 Service Manual

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
PB EON. SW.
PLAYBACK
EQUALISATION HEF4952BT
2A0 2A1 2A2
IEC I IEC II
REC EON.
7730 #
REC EON. SW.
HEF4952BT
3A0 3A1 3A2
(HS) (REC) (CRB)
1A0
ALCEN
7787
REC
1A2
7780
1A1
7791
CRA
2A0
7792
NS/HS 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
REC Out
DOLBY B NR
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