Akai GX-635D Service Manual page 26

S t e p Adjustment Item
Test Tape
Supply Signal
Mode
Adjustment
Point
Remarks
Tape Guide
Height
Optional
FWD
Tape Guide
Height
Adjustment
Nut
1) Adjust so that tape travels smoothly and
does not twist.
2) Do not thread tape over tension arm.
2
FWD Recording
Head Height
Optional
FWD
(a) (b) (c)
Upper edges of Left Ch. head core and tape
are the same height.
FWD Erase
Head Height
Confirmation
Optional
FWD
Upper edge of Left Ch. head core is 0.1 mm
higher than upper edge of tape.
4
FWD Playback
Head Height
Optional
FWD (d) (e) (f)
Upper edges of Left Ch. head core and
tape are the same height.
FWD Playback
Head Azimuth
Alighment
8,000 Hz
3-3l4 ips
Test Tape
FWD
(f) Maximum output, both channels.
6
FWD Playback
Head Angle
Alignment
9,000 Hz
3-3l4 ips
Test Tape
FWD (h)
Adjust head gap surface so that there is no
change in output level when tension is
applied to the supply reel side.
1
FWD Recording
Head Azimuth
Alignment
Scotch #2ll Tape
15,000 Hz
-20 dBm
REC
( c ) Maximum output. both channels.
8
FWD Recording
Head Angle
Alignment
Scotch #211 Tape
15,000 Hz
-20 dBm
REC
(c)
Adjust head gap surface so that there is no
change in output level when tension is
applied to the supply reel side.
NOTES: l.
Chart-4
As perfect head adjustments aÍe vital to tape deck performance, be sure that these adjustments are carried
out properly.
Be careful not to use a magnetized driver or other magnetized tools in the vicinity of the heads.
Use only new tape as level variation is likely to occur when using old tape.
Demagnetize heads with head demagnetizer before and after head adjustment'
S e t t a p e s p e e d t o 7 - 1 l 2 i p s .
Adjustments outlined in Chart 4 are only for FWD side heads. However, adjustments for REV side heads
are exactly the same.
2 .
J ,
Á ï .
5 .
6 .
29