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DA-98HR
Tascam DA-98HR Service Manual
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Effective : October, 2000 4A3489
S-0029
SERVICE MANUAL
INSTRUCTIONS FOR SERVICE PERSONNEL
BEFORE RETURNING APPLIANCE TO THE CUSTOMER, MAKE LEAKAGE-CUR-
RENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT.
D
D
A
A
-
-
9
9
8
8
H
H
R
R
Digital Multitrack Recor
der
2
Table of Contents
Default Chapter
2
Table of Contents
2
1 Specifications
3
Tape Recorder Section
3
Inputs and Outputs
4
IF-AN98HR (Option)
5
2 Technical Information
7
Activation of Test Mode
7
Activation of VTR Mode
7
Displaying ROM Version Numbers
7
How to Use the Built-In Oscillator
8
KEY PCB Check Mode
8
Removing the FRONT MPU
8
Removing the SYS ROM
8
A/D Board (ANALOG INPUT)
9
Changeover of Reference Level
9
Checking the Optional IF-AN98HR (A/D Board and D/A Board)
9
A/D Board
10
D/A Board
11
External Control I/O
12
J11 Pin Assignment
13
CONTROL I/O Serial Input/Output Signal Format
14
Recommended Circuit for a Controlling Device
15
Recommended Circuit (for Basic Control)
17
Recommended Circuit (for Full Function)
18
3 Assembling the Mechanism Ass'y
19
Flowchart of Assembling
19
Installation of the Mechanical Parts
20
Installing SECTOR GEAR ASS'Y
21
Installing SLIDE MGS SUB ASS'Y
21
Installing SLIDE MGT SUB ASS'Y
21
Installing MODE SW ASS'Y
22
Installing BAND BRAKE ASS'Y
23
Installing PINCH ROLLER SUB ASS'Y
23
Final Checking of Gear Meshes
24
Replacing BRUSH ASS’Y
25
4 Mechanism Adjustments
26
Preparation
27
Cleaning the Head Drum
27
Connecting the Oscilloscope
27
Test Tape
27
Adjusting the Tension Arm Position
28
Adjusting the Torque
28
Confirming the Take-Up Torque of the Take-Up Reel
29
Confirming the REV Take-Up Torque
29
Cautions When Replacing the Reel Table
29
Adjusting the Tape Travel
29
Linearity Check
31
Final Checking of each Guide
31
How to Set the Track-Off Mode
31
Confirming the Travel in F.FWD, REW and REV Mode
32
Cautions When Replacing the Drum
34
5 Electrical Adjustments
35
Check and Adjustment Points
35
+5 V Supply Check
36
P.G. (Phase Generator) Position Adjustment
36
Test Tape
36
DTRS Mode
37
HR Mode
37
Offset Adjustment in the VCO Free-Running Frequency Automatic Compensation Circuit
37
Checks in Confidence Mode
38
Checks in Normal Mode
38
ME Tape
38
Playback Equalizer Adjustment
38
RF Level Check
39
Playback Error Rate Check
40
Recording Current Adjustment
41
Recording/Playback Error Rate Check
43
Recording/Playback RF Level Check
43
6 Exploded Views and Parts List
45
7 Pc Boards and Parts List
53
Mother Pcb
53
Servo Pcb
54
Counter Pcb
54
Dsub Pcb
55
Bnc Pcb
55
Rf Play Pcb
56
Rf Rec Pcb
57
Sys Pcb
58
Key Pcb
60
If98Ad Pcb (If-An98Hr)
61
Mother Pcb Assy
65
Servo Pcb Assy
65
8 Included Accessories
71
Schematic Diagram
73
Wiring
73
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Tascam DA-98HR Specifications
General
Brand
Tascam
Model
DA-98HR
Category
Recording Equipment
Language
English
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