Akai GXF 31 Service Manual 2

This is the 19 pages manual for Akai GXF 31 Service Manual 2.
Read or download the pdf for free. If you want to contribute, please mail your pdfs to info@audioservicemanuals.com.

Page: 1 / 19
left right
Akai GXF 31 Service Manual 2

Extracted text from Akai GXF 31 Service Manual 2 (Ocr-read)


Page 1

SECTION 2

SERVICE MANUAL

MODEL GX-F3-ėI

TABLE OF CONTENTS

I. SPECIFICATIONS ....................................... 2- 2
II. CONTROLS ........................................... 2- 3
III. PRINCIPAL PARTS LOCATION ............................. 2- 4
IV. VOLTAGE AND CYCLE CONVERSION ........................ 2- 5
V. MECHANICAL ADJUSTMENT .............................. 2- 6
VI. HEAD ADJUSTMENT .................................... 2- 9
VII. AMPLIFIER ADJUSTMENT ................................ 2-11
VIII. DC RESISTANCE 0F HEADS ............................... 2-13
IX. CLASSIFICATION OF VARIOUS P.C BOARDS .................. 2-13

1. RC BOARD TITLES AND IDENTIFICATION NUMBERS .......... 213

2. COMPOSITION OF VARIOUS P.C BOARDS ................... 2-14

For basic adjustments, measuring methods, and operating principles, refer to GENERAL TECHNICAL
MANUAL.

Page 2

I. SPECIFICATIONS

TRACK SYSTEM

4 Track 2 Channel Stereo System

TAPE Philips Type Cassette

TAPE SPEED 4.76 cm/s t 1.0% (1-7/8 ips. 1 1.0%)

HEADS Twin Field Super GX head for recording/playback x l
Erase head x l

MOTORS FG servo DC. motor for direct capstan drive x 1

DC. motor for reel drive x 1

WOW & FLUTTER

0.10% WTD (DIN)
0.035% WRMS

TAPE WINDING TIME

90 sec. using a C-60 cassette tape

FREQUENCY RESPONSE Normal: 20 to 17,000 Hz -ú:3 dB
00;. 20 to 18,000 Hz 13 dB
Metal: 20 to 19,000 Hz :3 dB
FREQUENCY RANGE Normal; 15 to 18,000 Hz
C00,: 15 to 20,000 Hz
Metal: 15 to 21,000 Hz
SIGNAL TO NOISE RATIO Metal: 60 dB

(measured via tape with peak recording level)

Dolby B-type NR switch ON: Improves up to 5 dB at 1 kHz, 10 dB
above 5 kHz

Dolby C-type NR switch ON: Improves up to 15 dB at 500 HZ, 20 dB
at 1 kHz to 10 kHz

HARMONIC DISTORTION

1 kHz, 3rd hannonic distortion

Metal: 018%
INPUT MIC: 0.25 mV (600 ohms)
Line: 70 mV (47 kohms)
OUTPUT Line. 410 mV (less than 2 kohms)
Phone: 1.3 mW (8 ohms)
DIN Input: 20 mV (10 kohms)
Output: 410 mV

POWER REQUIREMENTS

100V, 50/60 Hz for Japan

120V, 60 Hz for USA and Canada

220V, 50 Hz for Europe except UK

240V, 50 Hz for UK and Australia

110V/120V/220V/240V, 50/60 Hz switchable for other countries.

POWER CONSUMPTION

U, C, A Models 22W
J Mode] 20W

DIMENSIONS 440(W) x 100(H) x 345(1)) mm
(17.3 x 3.9 x 13.6")
WEIGHT 518 kg (12.8 lbs)

* For improvement purposes, speciÔ¨Ācations and design are subject to change without notice.
* -úDolby" and the Double D symbol are trademarks of Dolby Laboratories.
(Manufactured under license from Dolby Laboratories).

2-2