Akai GX 650 D Schematic
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Extracted text from Akai GX 650 D Schematic (Ocr-read)
Page 2
STEREO TAPE DECK
MODEL G X _650 D
SECTION 1 SERVICE MANUAL ......................... 1
SECTION 2 PARTS LIST .............................. 27
SECTION 3 SCHEMATIC DIAGRAM ....................... 48
SECTION 1
SERVICE MANUAL
TAB LE OF CONTENTS
I. TECHNICAL DATA ....................................................... 2
II. DISMANTLING 0F UNIT ................................................. 3
III. ARRANGEMENT 0F PRINCIPAL PARTS ....................................... 4
Iv. MECHANISM ADJUSTMENT ................................................. 5
I, CAPSTAN SHAFT LOOSE PLAY ADJUSTMENT ................................ 5
2. BRAKE SOLENOID POSITION ADJUSTMENT .................................. 5
3 BRAKE TENSION ADJUSTMENT ........................................... 6
4. PINCH ROLLER SOLENOID POSITION ADJUSTMENT ............................ 7
5. SHIFTER SOLENOID POSITION ADJUSTMENT ................................ 7
6. PINCH ROLLER PRESSURE ADJUSTMENT ................................... 8
7. REEL TAELE HEIGHT ADJUSTMENT ................ 8
8. TAPE GUIDE HEIGHT ADJUSTMENT . ........ 9
9. TENSION LEVER HEIGHT ADJUSTMENT .................................... 9
10. CONFIRMATION OF POINT AT WHICH LEFT AND RIGHT TENSION
ARMS OPERATE ................................................. 10
11. TENSION ARM RETURN TENSION ADJUSTMENT .............................. II
12. HALL IC(DN835) AND ROTARY MAGNET CLEARANCE ADJUSTMENT . . 11
V, HEAD ADJUSTMENT ...................................................... 12
VI. AMPLIFIER SYSTEM ADJUSTMENT ........................................... 14
1. DC POWER SUPPLY VOLTAGE ADJUSTMENT ................................. l4
2. TAPE SPEED ADJUSTMENT .............................................. 14
VII. DC RESISTANCE OF VARIOUS COILS .......................................... 16
VIII. CLASSIFICATION OF VARIOUS P.C. BOARDS .................................... 17
1. RELATION OF P.C BOARD TITLE AND NUBMER ............................... 17
2. COMPOSITION OF VARIOUS P.C BOARDS .................................... 17
For basic adjustments, measuting methods, and operating principles. refer to GENERAL OPERATING PRINCIPLES AND
ADJUSTMENTS.
Page 7
TENSION LEVER
.-POS|T|ON AT WHICH MICRO
SWITCH IS CUT
MICRO SWITCH
2mm
AFTER BEING CUT THE MICRO
SWITCH OPERATES AT A MINIMUM
OF 2mm BELOW THE CUTTING POINT
6 T0 7qr.
DIAL TENSION GAUGE
Fig. 17
Fig. 18
10. CONFIRMATION OF POINT AT WHICH 11. TENSION ARM RETURN TENSION
LEFT AND RIGHT TENSION ARMS
OPERATE
Confirm that the left and right micro switches ope-
rate at the positions indicated in Fig. 17.
A DJ USTMENT
Bend the oval shaped lug terminal and adjust the
strength of coil spring so that as shown in Fig. 18,
when the tension arm returns in the direction of
the arrow, the tension registered with a tension
gauge is 6 to 7 gr,
10
A-A
Ill
REEL TABLE
it Imm
C
STOP DETECTION RC
BOARD TY-IOO5
«KAI
30g;
Q
>121
©
STOP DETECTION RC
BOARD TY-IOOS
in
Fig. 19
12. HALL IC (DN835) AND ROTARY
MAGNET CLEARANCE ADJUSTMENT
Adjust the Stop Detection P.C Board in the directions
indicated by the arrow mark so that the gap between
the Hall IC and the rotary magnet is 1 mm as shown
in the Fig.19.
1|