Akai GX-F44R

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SECTION 1
SERVICE MANUAL
TABLE OF CONTENTS
SPECIFICATIONS 200.0805. cdsb area Ea ORS eM ERE Dh 4
DISMANTLING OF UNIT... 6... eee 5
CONTROUES 3 26 208 ne ere ot OEY Sie A A eee ee aks 6
PRINCIPAL PARTS LOCATION .. 10... 0.00.00. cc eee es 7
VOLTAGE AND CYCLE CONVERSION... ........-...0.0 000000 0e 8
1. VOLTAGE CONVERSION ... 2.22... 0 cee eee 8
2. CYCLE CONVERSION, 4. festi8 Sle les 8 ey icanlnee Be Es, adie Coe aie Be ads 8
SYSCON BLOCK DIAGRAM............ 2.0... cee eee eee 9
DOLBY C-TYPE NOISE REDUCTION .............. 00000000000] 11
he OUTLINE’. » 522n side ita ol sad cies Gia. g 2a alee Oig cl A 2d ade eae 11
2. CIRCUIT COMPOSITION ....... 00.00.00 cece ee eee 1]
3./CEIRCUET OPERATION csi feces Se age slags, Walk lente ieg ites SMe tea dein 12
4. ACTUAL CIRCUIT OPERATION. .......... 00.2. ..0 00000000. 15
MECHANICAL ADJUSTMENT ........... 2.000. e eee cee eee 20
1. FLYWHEEL LOOSE PLAY ADJUSTMENT ...................4, 20
2. PLUNGER POSITION ADJUSTMENT .............0..22. 00005. 21
3. PINCH ROLLER PRESSURE MEASUREMENT .................. 22
4. WINDING TORQUE MEASUREMENT IN EACH MODE ............ 22
5. TAPE SPEED ADJUSTMENT ............ 0.0.0.0 0.00 eee 22
HEAD ADJUSTMENT ......... 0... cc cece ee eens 23
1. ERASE HEAD HEIGHT ADJUSTMENT ...................20.0. 23
2. ERASE HEAD INSTALLATION ANGLE ADJUSTMENT ........... 23
3. TAPE GUIDE HEIGHT ADJUSTMENT..................0..0.-. 24
4. REC/PB HEAD HEIGHT ADJUSTMENT ................-.-00 0005 24
5. REC/PB HEAD AZIMUTH ADJUSTMENT ................-.... 24
ELECTRICAL ADJUSTMENT .......... 0.0.0.0 cece ee eee eee -. 25
1. QUICK REVERSE SENSITIVITY ADJUSTMENT ................ 25
2. PRE AMPLIFIER ADJUSTMENT... ....... 0.0.0.0 2 00. c ee eae 27
3. DOLBY ADJUSTMENT ............ 0.0... 0.0 ee eee 27
DC RESISTANCE OF VARIOUS COILS .....................0045 28
CLASSIFICATION OF VARIOUS P.C BOARDS ................... 28
1. P.C BOARD TITLES AND IDENTIFICATION NUMBER ........... 28
2. COMPOSITION OF VARIOUS P.C BOARDS .................04. 29
For basic adjustment, measuring methods, and operating principles, refer to GENERAL TECHNICAL
MANUAL.