Teac TASCAM 32 - Page 3

TABLE
OF
CONTENTS
Introduction
to
the
32
and
{ts
Design
Philosophy .. ... eee eee eee cece eens 3
Features
and
Controls
..........0-22.05.
4
Basic
Information
........
cece
eee
eee
8
Entering
“Record”
6.60.
c2e
ease
essa
ees
9
Voltage
Conversion
......
0.0
e
eee
e
eee
11
Note
for
U.K.
Customers
............44.
11
Connection
and
Operation
of
the
DX-2D...
12
M-30
Recording
Mixer
..........
ee
eee
15
Accessory
Information
...........0...65
17
Specifications
of
the
32
.........--.+45.
19
The
dB;
Who,
What,
Why
............20-
21
Impedance
Matching
and
Line
Levels
......
25
Reference
Levels
.........0eeeeeee
cece
27
Calibration
2...
cc
ccc
eee
eee
29
More
Information
is
Available
...........
30
THEORY
OF
OPERATION-MAINTENANCE
CIEANING:
iialecerens,
Fate
OH
A
eae
Lies
32
Degaussing
(Demagnetizing)
.............
33
Test
Equipment/Materials
..............
33
1)
Alignment
Tapes
..........-2ee
eee
33
2)
VTVM
or
FET
Multimeter
..........
36
3)
Signa!
Generator
or
Oscillator
.......
36
4)
The
Oscilloscope
..........eeee
eee
37
5)
Test
Tapes
for
the
32
............--
39
Electrical
Adjustment
Procedure
.........
40
1)
Location
of
Electrical
Adjustments
...
40
2)
Reproduce
Calibration
............-.
41
3)
Input
Calibration
...........6..0--
42
Ay.
AbOUtThE
Bias
4
corsa
tad
ete
wats
43
5)
Bias
Level
Adjust
..........-.000e-
44
6)
Bias
Trap
Adjust
...........0e
eee
45
7)
Record
Level
Adjust...............
45
8)
The
Peak
Adjust
Circuit
............
46
Daily
Setup...
ces
eee
cece
eter
e
renee
47
General
Advice
on
Maintenance
..........
48
Service
Chart
......
0.0
cece
eee
eee
eee
49
MAINTENANCE
1. Circuit Description
1-1. Logic Used in the Tape Deck ...... 53
1-2. System Control IC .............. 53
1-2-1. Pin Assignments and
their Functions............. 53
1-2-2.
Block
Diagram
............4-5
54
1-2-3. Input Signals and
Resulting Modes............ 54
1-2-4.
Mode
Transition
.............
55
1-2-5.
Operation
with
more
than
One
Input Signal .........0.005. 55
1-2-6. Input/Output Levels.......... 55
1-2-7. Initial Reset Circuit .......... 56
1-3.
Power
Shut-Off
Circuit...........
56
1-4, Capstan and Brake Solenoid
Drive Circuit. ...... 0. eee ee eee 57
1-5. Reel Motor Drive Circuit ......... 59
1-6. Tape Direction Sensing and Counter
Clock Generation Circuit ........ 61
1-7. Counter Clock Pulse ............. 62
1-8. Motion Sensing Circuit ........... 62
1-9. F.F. and REW Operation ......... 63
1-10. Electrical Brake System .......... 63
1-11. Counter Zero Return ...........- 65
1-12. Punch In/Out Control Circuit...... 67
1-13. Edit Control Circuit ............. 69
1-14. Rec and Play Mute Signals ....... 69
1-15. Display Circuit .......... 000. eee 70
1-16. Amplifier Circuit Description ...... 71
1-16-1. Power Muting Circuit ......... 71
1-16-2. Bias and Record Control Circuit. 72
1-16-3. Reproduce Amplifier Circuit ... 74
2. Checks and Adjustments
2-1. Essential Test Equipment
Required: civ ecsc deen s eed s 77
2-2. Removing the Panels of the Deck ... 78
2-3. Capstan Thrust Clearance ......... 79
2-4. Brake Mechanism ..........05.555 79
2-5. Brake Torque ..........0ee cess 79
2-6. Reel Motor Torque.............. 80
2-6-1 Take-Up Torque ............. 80
2-6-2. Back Tension ..........20005 81
2-7. Pinch Roller Pressure ............ 81
2-8. Reel Table Height Adjustment ..... 82
2-9. TapeSpeed.......... cece we ees 82
2-10. Wow and Flutter Check .......... 82
2-11. Record/Reproduce Amplifier Checks
and Adjustments .........-..4. 83
Preliminary Adjustments ............. 83
2-11-1. Input Level Calibration ....... 85
2-11-2. Input Meter Calibration ....... 85
2-11-3. Reproduce Level Calibration ... 85
2-11-4. Reproduce Meter Calibration ... 86
2-11-5. Reproduce Frequency
Response ..........0020 ceee 86
2-11-6. Bias Tuning and Bias Trap
Adjustments .........-0 000. 86
2-11-7._ Recording Bias Adjustment .... 87
2-11-8. Recording Level Adjustment ... 88
2-11-9. Frequency Response (Overall) .. 88
2-11-10. Signal-to-Noise Ratio (Overall) .. 89
2-11-11. Erase Ratio... .... 0. eee eee 89
2-11-12. Channel Crosstalk ........ 0... 89
2-11-13. Distortion... . 2... ce tees 90
2-11-14. Headphones Output Level . .... 90
2-11-15. Mic Level Check .........0... 90
3. Exploded Views and Parts List ......... 91
Schematic Diagrams ..........00. 0 ce os Insert
*dbx Noise Reduction Unit DX-2D and Recording Mixer
M-30 are optional.