Akai GXR 88 Service Manual

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ABBREVIATIONS FOR SERVICE MANUAL

MODEL GX-R88

Abbreviation Explanation Abbreviation Explanation
AC Alternating Current MICOM MlcroCOMpLIter
A/D Analog/Digital MIN MlNute
AF Anto Fader MPX Multi PleX
AM Auto Monitor NC Not Connected (No Connection)
AMP AMPlifier NFB Negative Feed Back
AR Anti Recording NORM NORMal
BEF Band Elimination Filter NR Noise Reduction
BSS Blank Search System OSC OSCillator (SOCillation)
CH CI-Iannel P Pulse
CN Cam Normal PIBI Play Back
COMP COMParator QMSS Quick Memory Search System
CR Cam Reverse R Right
CS Cam Stop REC RECord (RECording)
D/A Digital/Analog REV REVerse
DC Direct Current ROT ROTation
DET DETector REW REWind
DISCRI DISCRIminator SEC SECond
EQ EQualizer SELE SELEctor
FF Fast Forward SENS SENSitivity
FLD FLuorescent Display SEPP Single Ended Push Pull
FREQ FREQuency SIG SIGnal
FWD ForWarD SPECT SPECTrum
GND GrouND STD STanDard
H High SW SWitch
HPF High Pass Filter SYSCON SYStem CONtrol
IND INDicator TP Test Point
IPLS Instant Program Location System VOL VOLume
L Low VOLT VOLTage
LED Light Emitting Diode VR Variable Resistor
M Motor XTAL crysTAL

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VI.

VH.

VIII.

D(.

SECTION 1

SERVICE MANUAL

TAB LE CNTENTS

SPECIFICATIONS ........................................ 4
DISMANTLING 0F UNIT .................................. 5
CONTROLS ............................................ 6
PRINCIPAL PARTS LOCATION .............................. 7
MECHANICAL ADJUSTMENT ............................... 9
5-1 PINCH ROLLER PRESSURE MEASUREMENT ............. 9
5-2 WINDING TORQUE MEASUREMENT IN EACH MODE IIIIIIII 9
5-3 HOW TO INSTALL VOLUME (VR901) AND CAM WHEEL ,,,,, 10
54 POTENTIO METER PRESET VOLTAGE ADJUSTMENT ........ 11
5~5 TAPE SPEED ADJUSTMENT ............................ 13
HEAD ADJUSTMENT ..................................... 14
6-1 TAPE GUIDE HEIGHT ADJUSTMENT ..................... 14
6-2 REC/PB HEAD AZIMUTH ADJUSTMENT .................. 15
6-3 HEAD HEIGHT ADJUSTMENT ......................... 15
6-4 HEAD BLOCK PROJECTION ADJUSTMENT ................ 15
ELECTRICAL ADJUSTMENT ................................ 16
7-1 PRE-AMPLIFIER PC BOARD ADJUSTMENT ................ 16
7-2 TUNING ADJUSTMENT POINT ......................... 18
7-3 QUICK REVERSE SENSITIVITY ADJUSTMENT .............. 20
DC RESISTANCE OF HEADS ............................... 21
P.C BOARD TITLES AND IDENTIFICATION NUMBERS ........... 22

For basic adjustments, measuxing methods, and operating principles, IefeI (0 GENERAL TECHNICAL
MANUAL.

SERVICE MANUAL GX-R88