Service manual

ETF7 TAPE MODULE
(Non-Dolby Version)
9-1
9-1
TABLE OF CONTENTS
Tape Module Wiring & variation table ....................... 9-1
Block diagram ............................................................ 9-2
Brief Introduction ....................................................... 9-3
Connector assignment............................................... 9-4
Tape deck electronics & Tape adjustments ............... 9-5
ETF7 Non-Dolby board layouts ................................. 9-6
Analog Circuit diagram .............................................. 9-7
Servo Circuit diagram ................................................ 9-8
Exploded views & parts list........................................ 9-9
Electrical parts list.................................................... 9-13
REC
FWD
CRO2*
REC
REV
MODE
SW
TAPE DECK
MOTOR
TO ETF BOARD
CONNECTOR 1710 (ND) 5P
CONNECTOR 1720 (DB) 6P
TO ETF BOARD
CONNECTOR 1770 (ND) 14P
CONNECTOR 1740 (DB) 14P
TO ETF BOARD
CONNECTOR 1730 (3P)
Tapedeck wiring (Double deck)
+
–
H
L
CRO2*
Mechanism B Mechanism A
* Not for Ferro version
Chrome/Ferro Chrome/Ferro Ferro
2624 - - 100nF
2701 , 2702 150pF 270pF 270pF
2703 , 2704 100pF 220pF 220pF
2717 , 2718 10nF 15nF 15nF
2721 , 2722 6,8nF 6,8nF -
2727 , 2728 470pF 1nF 1nF
3616 10k 1k 1k
3618 6k8 - -
3620 10k trimmer - -
3622 - 10k trimmer 10k trimmer
3672 4k7 - -
3676 47k - -
3687 220R 220R -
3688 680R - -
3723 , 3724 15k 18k 18k
3725 , 3726 10R 10R -
3727 , 3728 5k6 6k8 6k8
3729 , 3730 3k3 4k7 4k7
3743 , 3744 1k5 2k2 2k2
3745 , 3746 3k3 5k6 5k6
3754 , 3755 1M 47R 47R
Variations table for Analog Circuit
Autoreverse Non-autoreverse
ND/DD/FR ND/DD/FF
Autoreverse Non-autoreverse
ND/DD/FR ND/DD/FF
Chrome/Ferro Chrome/Ferro Ferro
3769 12k 8k2 8k2
3772 6k8 5k6 5k6
4785 - - 0R jumper
3774 15k 8k2 8k2
6614 1N4148 - -
7616 BC857B - -
7622 BC847B - -