Akai GXM 30 Service Manual

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GX-M30

GX-M50

STEREO CASSETTE DECK

GX-M30
MODEL GX' M50

ALSO APPLICABLE TO BLACK PANEL MODEL

SECTIONI SERVICEMANUAL..I................. 3
SECTIONZ PARTSLIST................... ....... 41
SECTION 3 SCHEMATIC DIAGRAM ............ 75

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III.

g.<

VII.

VIII.

XI.

SECTION 1

SERVICE MANUAL

TABLE OF CONTENTS

TECHNICAL DATA ....................................... 4
1. Model GX-M30 ........................................ 4
2. Model GX~M50 ........................................ 5
DISMANTLING OF UNIT ................................... 6
CONTROLS ............................................ 7
1. Model GX-M30 ........................................ 7
2. Model GX-MSO ........................................ 8
PRINCIPAL PARTS LOCATION .............................. 9
1. Model GX~M30 ........................................ 9
2. Model GX-MSO ........................................ 10
VOLTAGE CONVERSION .................................. 11
IPLS OPERATION .......... . .............................. 12
l. IPLS (Instant Program Locating System) ........................ 12
2. DESCRIPTION OF KEYBOARD OPERATION ..... ' ............. 14
MECHANISM ADJUSTMENT ................................ 16
1. FLYWHEEL LOOSE PLAY ADJUSTMENT ..................... 16
2. PINCH ROLLER PRESSURE MEASUREMENT .................. 16
3. TAKE-UP TORQUE AT VARIOUS MODES .................... 16
4. BACK TENSION MEASUREMENT .......................... 16
5. PLUNGER POSITION ADJUSTMENT ........................ 16.
6. LEAF SWITCH TIMING ADJUSTMENT ....................... 17
7. TAPE SPEED ADJUSTMENT .............................. 17
HEAD ADJUSTMENT ..................................... 18
1. TAPE GUIDE HEIGHT ADJUSTMENT ........................ 19
2. REC/PB HEAD PROJECTION ADJUSTMENT ................... 19
3. RECORDING/PLAYBACK HEAD HEIGHT ADJUSTMENT .......... l9
4. RECORDING/PLAYBACK HEAD AZIMUTH

ALIGNMENT ADJUSTMENT .......... 19
AMPLIFIER ADJUSTMENT ................................. 20
1. Model GX-M30 ........................................ 20
2. Model GX-MSO ........................................ 24
DC RESISTANCE OF VARIOUS HEADS ........................ 28
CLASSIFICATION OF VARIOUS P.C BOARDS ................... 28
1. P.C BOARD TITLES AND IDENTIFICATION NUMBERS ........... 28
2. Model GX-M3O COMPOSITION OF VARIOUS P.C BOARDS ......... 29
3. Model GX-MSO COMPOSITION OF VARIOUS P.C BOARDS ......... 33

For basic adjustments7 measuring methods, and operating principles, refer to GENERAL TECHNICAL
MANUAL.

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CONTROLS

1. Model GX-M30

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Fig. 1 Controls

POWER SWITCH 12. LINE RECORDING LEVEL CONTROLS

1.

2. CASSETTE RECEPTACLE 13. LEFT AND RIGHT MICROPHONE JACKS

3. PEAK/VU INDICATORS 14. HEADPHONE JACK

4. INDEX COUNTER AND RESET BUTTON 15. OUTPUT LEVEL CONTROL

5. MEMORY BUTTON 16. BIAS ADJUSTER (JPN, AAL MODELS ONLY)
6. IPLS BUTTON 17. TAPE SELECTOR SWITCH

7. PEAK/VU SELECTOR BUTTON 18. REC MUTE

8, DOLBY NR BUTTON 19. OPERATING KEYS

9, FL DISPLAY BAR METERS 20. LINE INPUT JACKS
10, MICROPHONE/DIN RECORDING LEVEL CONTROLS 21. DIN JACK IU/T, CSA, CEE, U.K. MODELS ONLY)
11. RECORDING INDICATOR LAMP 22. LINE OUTPUT JACKS

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MEMO

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