Philips MC-50/22 - ETF6-LE Tape Module

ETF6-LE TAPE MODULE
(Non-Dolby / Single Deck)
9-1
9-1
TABLE OF CONTENTS
Block Diagram ........................................................... 9-1
Brief Introduction & Connector assignment .............. 9-2
Tape Module Wiring & variation table ....................... 9-3
Tape Mechanism electronics & Tape adjustments .... 9-3
ETF board layouts - Components & Chips ............... 9-4
Analog Circuit diagram .............................................. 9-5
ETF board layouts - Components & Chips ............... 9-6
Servo Circuit diagram ................................................ 9-7
Exploded views & parts list........................................ 9-8
Electrical parts list.................................................... 9-10
BLOCK DIAGRAM
Deck B (Rec/Pb) switches, sensors & motor
4x
DECK(S) SW.
STATUS TO
VOLTS CONV.
2x
SOLENOID
SUPPLY CTRL
SOLENOID
SUPPLY CTRL
MOTOR VCC
SUPPLY CTRL
NS/HS CTRL
Deck A (Pb) switches, sensors & motor *
NOM/HI SPEED
REC EON.
IEC I IEC II
REC EON.
REC EON. SW.
HEF4952BT
OSCILLATOR
REC
CRB
Line-In
Playback
Head*
Rec/Pb
Head
Erase
Head
BIAS SYM
ELECT. SW.
BIAS ADJ
Erase
Bias
REC
ALCEN
PRE-AMPLIFIER
AN7318S
SOURCE SEL
HEF4952BT
1A0 1A1 1A2
Rec current
ATTEN
ALC
PLAYBACK
EQUALISATION
PB EON. SW.
HEF4952BT
2A0 2A1 2A2
SHIFT
REGISTER
HEF4094BT
3A0 REC CRB
PB Out
ATTEN
#
CLK
DATA
STROBE
# For Non-dolby version only
Only 1 channel is presented.
* Not for Single deck
& Provision only
NOTE:
MicroProcessor Control / Communication lines
Direct / Indirect Control lines from Shift Registers
AD1 AD2
7710
7720
7740
7730
1A0
2A1
2A2
REC
NS/HS (NS)
HS
NS/HS
(NS)
3A0
2A0
CRA
7792
7622
7610
Date: wk0050
#
1A2
1A1
ALCEN
1A0
REC
7787
7791
7780
7786
CRA
CRB
*
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