Tascam DA 98HR Service Manual
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Extracted text from Tascam DA 98HR Service Manual (Ocr-read)
Page 1
TASCAM
TEAC Professional Division
SERVICE MANUAL
DA-98HR
Digital Multitrack Recorder
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.
INSTRUCTIONS FOR SERVICE PERSONNEL
Effective : October, 2000 4A3489
8-0029
Page 2
CONTENTS
1_ SPECIFICATIONS .............................. 3
2.TECHNICALINFORMATION ------~--nn----u7
2-1. Activation of test mode ---------------------- 7
2-2. Activation of VTR mode --------------------- 7
2-3. Displaying ROM version numbers ~~~~~~~~~~~~~ 7
2-4. Displaying SUB MPU version numbers - ~ - - 7
2-5. Displaying the voltage of battery ~~~~~~~~~~~~~~ 7
2-6. Displaying the hed drum utilized time ~~~~~~~~~~ 7
2-7. Displaying the servo error history ~~~~~~~~~~~~~~ 7
2-8. KEY PCB check mode ....................... 8
2-9. How to use the built-in oscillator ~ -
2-10. Removing the FRONT MPU ~~~~~~~~~~~~~~~~~ 8
2-11. Removing the SYS ROM ~~~~~~~~~~~~~~~~~~~~ 8
2-12. Checking the optional IF-AN98HR (A/D board
and D/A board) ........................... 9
2-13. Changeover of Reference level ~~~~~~~~~~~~~~ 9
2-14. EXTERNAL CONTROL l/O ----------------- 12
3. ASSEMBLING THE MECHANISM ASS'Y . ~ - . . - . - - 19
3-1. Flowchart of assembling -------------------- 19
3-2. Installation of the mechanical parts ~~~~~~~~~~~ 20
4. MECHANISM ADJUSTMENTS 26
4-1. Preparation .................... 27
4.2_ Test tape ................................. 27
4-3. Adjusting the tension arm position ~~~~~~~~~~~~ 28
4-4. Adjusting the torque ........................ 25
4-5. Adjusting the tape travel ~~~~~~~~~~~~~~~~~~~~ 29
4-6. Confirming the travel in F.FWD, REW and
REV mode ............................... 32
5. ELECTRICAL ADJUSTMENTS - - - - . - - - - ' ' ' - - - - -35
5-1. Check and adjustment points ~~~~~~~~~~~~~~~~ 35
5.2_ Test tape ................................. 36
5-3_ +5 V suppjy check ......................... 36
5-4. P.G. (Phase generator) position adjustment ~ ~ - ~ 36
5-5. Offset adjustment in the VCO free-running
frequency automatic compensation circuit ~~~~~ 37
5-6. Playback equalizer adjustment ~~~~~~~~~~~~~~~ 38
5.7_ RF level check ............................ 39
5-8. Playback error rate check - - - . 40
5-9. Recording current adjustment ~~~~~~~~~~~~~~~~ 41
5-10. Recording/playback RF level check ~~~~~~~~~~ 43
5-11. Recording/playback error rate check --------- 43
6. EXPLODED VIEWS AND PARTS LIST
7. PC BOARDS AND PARTS LIST
8. INCLUDED ACCESSORIES
...........45
..53
Efl
1111; .......................................... 3
2.5-7:7j)b4>77jx-=/3> ................... 7
2-1.7T-XFE- lefiéb ----------------------------- 7
2-2.VTR¥- muggy ............................... 7
2-3. ROM®I§A§3 yfifi .............
2»4. SUB mum/(~73 >§fx -- ~7
2-5. I\'-y-?U ngEfifl-V --------------
2-6. FfiAEléiiéfiflaFefiOE/fi ---------------------- 7
2-7. vafilaafimofifi ......................... 7
2-8. KEY P089117 7%7 l~" ........................ g
29. wasnwsworsmmz .......
2-10. FRONT MPurMi L75 -------------
2-11. svs ROMer b7:- ----------------------------- 8
2-12. 7T7) a y lF-AN98HR (A/Drri- F, D/Atie F)
(7);: ~y 7i::u.\( --------------------------- 9
Z13.'J77I/PXI/NJLUJEEKOVT ............ 9
2-14. EXTERNAL CONTROL I/Olzour -- .12
3_ x 71 Ass'Ymgfij ............................. 19
3-1.$Eި7n~-:Hvil~ -------------------------- 19
3-2. X figrammnw ------------------------------ 20
4_ mggfigg ................................... 26
4-1. iElirE-m
4-2. 7:2 I~7~7 ...............
4-3. 7)? a >7~Afi§§fi¥ ..................... 28
4-4. |~Jlx7§fi§g ..................................... 28
4-5. -? 7 jflfilfl -------------------------------- 29
4-6. FF, REW, REV REE Ffioifiiéiis ------------ 32
5. Efifiifig ................................... 35
5-1. ififlifififih; UEfiEEfifi ----------------------- 35
5.2. 5-2 |~7-#7 ................................... 35
5-3. Realé+5vm-§£ ------------
5-4. PG (Phase Generator) fifiafifi ---------------
5-5. V007 U -5 >l§ii§§ifi§lfilfl§lfi§
097nm rem ------------------------------ 37
56. air narfi~§R¥ ------------------------- 38
5-7. RFI/NwfiEEE .................................. 39
5-8. E$15~v~ bit/E533 ......
5-9. easiamem ---------
5-10. Eafifii RFI/NMEEE ........... 43
5»11.§B§ifi$l5~b# HEEE ------------------- 43
6.5}fl.tl\-yl}1|~ .......................... 45
Igfilt/t-yuzp .......................... 53