Akai GX-630D

4. RECORDING AND PLAYBACK
(Refer to Figs. 13, 14)
Step
Adjustment Item
Test Tape
Supply Signal
Bias Leak
Dolby Noise
Reduction
Adjustment
Mode
Adjustment
Point
Less than
—50 VU
at monaural.
: Test Tape Adjustment
s
tep
|
Adjustment
Item
Süpply
Siendl
Mode
Point
Result
Remarks
1 Playback Level 700 Hz 7-1/2 ips PLAY VR-1 0+1.5 dB
Adjustment 0 VU Test Tape 50 kB (0.775V)
VU Meter ;
2 Sensitivity hen PLAY ven o vu
Adjustment est Tape EE
; | Recording Level En ee HE VR-2 0 +1.5 dB
| Adjustment cort 10 kB (0.775V)
Franlenes SCOTCH #211 Tape 1,000 Hz
4
Response
1,000
Hz
REC
C-25
to
Tape
Speed
3-3/4
ips.
Adiustment
10,000
Hz
80P
10,000
Hz
Recheck
recording
level.
ij f
—20 VU recording flat
5 Bias Leak REC Less than Less than —20 VU
—30 VU
Chart 2
AMPLIFIER ADJUSTMENT (Model GX-630DB)
1 Playback Level 700 Hz 7-1/2 ips PLAY VR-1 0 +1.0 dB
Adjustment 0 VU Test Tape 50 kB (0.775V)
VU Meter 700 Hz 7-1/2 ips vR3
Sensitivity 0 VU Test Tape PLAY 0 VU
2 be 2 kB
Adjustment
bd
Recording Level SCOTCH #211 Tape 8
3 Adjustment 1,000 Hz REC En en
(Low Noise Tape) 0 VU recording "
Recording Level AKAI LN-150-7
4 Adjustment Tape 1,000 Hz REC Ne en pd
(Wide
Range
Tape)
0
VU
recording
Ë
Preäubne SCOTCH #211 Tape 1,000 Hz
5 be ea 1,000 Hz REC C-25 to Tape Speed 3-3/4 ips.
dinners 10,000 Hz 80P 10,000 Hz _|_Recheck recording level,
he —20 VU recording flat
|
Refer to Item V-5
below.
mE
Chart 3
NOTES: I) Set tape speed to 3-3/4 ips for frequency response adjustment and to 7-1/2 ips for all other adjustments.
2) Set Tape Selector to “LOW NOISE” except where otherwise noted.
3) Set Monitor Switch to “TAPE” except where otherwise noted.
4) Output Volume at maximum.
5) New test tape should be used.
6) The letter b following an adjustment part number indicated “Right Channel”.
14