Akai AX-890 User Manual

4-3. ADJUSTMENT
NOTE:
1. Set the S.S.G to 1 kHz, 75 kHz deviation for [U],
[S], [B], or [E] model and 1 kHz 40 kHz deviation
for [V] model during FM section adjustment.
2. Set the S.S.G to 1 kHz, 30 % modulation during
AM section adjustment. The frequencies indicated
in < > are for the [E] version model.
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'3[ FM TUNING INDICATOR
1. 98.0 MHz, 22 dBu (MONO)
2. 98.0 MHz (preset 1 ch but FM MONO)
3. Tuning Indicator on the FLD, VR1
4. * Tuning indicator is lit at 22 dBy input.
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i 2 MONO USABLE SENSITIVITY "|
1. 98.0 MHz, 3 dBy (MONO)
2. 98.0 MHz (preset 1 ch but FM MONO)
3. T2
4. © Connect the distortion meter to the LINE OUT,
* Minimum distortion
| 4| DISTORTION (STEREO
1. 98.0 MHz, 60 dBy (STEREO L or R channel only)
4 2. 98.0 MHz (FM AUTO, preset 1 ch)
3. T2
4. ¢ Connect the distortion meter to LINE OUT.
* Minimum Distortion (less than 1.0 %)
Note: Never turn the T2 more than + 90°,
CENTER VOLTAGE
1. 98.0 MHz,60 dBu (MONO)
2. 98.0 MHz (FM AUTO, preset 1 ch)
3.71 ,
4. ¢ Connect the DC Digital Voltmeter to both ends
of TP2(R8).
* 045
#| 1. 98.0 MHz, 60 dBy (STEREO L or R channel only)
| 2. 98.0 MHz (FM AUTO, preset 1 ch)
3. VR2
1 4. ¢ Connect the milli-voltmeter to LINE OUT.
* Minimum output level for opposite channel.
Seo =
ADJUSTMENT ITEM
1. S.S.G frequency & output level
2. Set's tuning frequency & mode
3. Test point, adjustment part
4. Remarks (¢) & result (*)
&
Test Point Adjustment Part
1c61
TP1
T33KY
(RED) KY
T34KY
(ORG) KY
T35
TU-CD PCB
Vv
FRONT
SERVICE MANUAL
1. 162 kHz, 74 dBy (Low) & 279 kHz <297 kHz>,
74 dBy (High)
2. 162 kHz (preset 4 ch), 279kHz <297 kHz> (preset
| 5 ch)
3. T32 (Low), VC32. (High)
4. ¢ Connect the distortion meter to LINE OUT.
* Minimum distortion & maximum output level.
* For best results, repeat Low and High
adjustments several times
4{MWSENSITIVTY
1. 603 kHz, 74 dBy (Low) & 1,404 kHz, 74 dBy |
(High)
2. 603 kHz (Low) (preset 8 ch) 1,404 kHz (High)
(preset 7 ch)
3) 3. T31 (Low) & VC31 (High)
1 4. ¢ Connect the distortion meter to LINE OUT.
%* Minimum distortion & maximum output level.
* For best results, repeat Low and High
adjustments several times.
1,404 kHz (preset 7 ch)
33
Connect the Digital DC Voltmeter between
TP1 (JW 91) and GND.
. 279 kHz <351 kHz> (preset 10 ch)
. TP1 (JW 91) & T34
. © Connect the Digital DC Voltmeter between
TP1 and GND.
* 5.44 0.05V <8.2.+ 0.05V>
1. 198 kHz, 74 dBy
2. 198 kHz (preset 6 ch)
3. T35
4. Connect the milli-voltmeter to LINE OUT.
1 %& Maximum output level
1. 999 kHz, 55 dBu
2. 999 kHz (preset 9 ch)
3. Tuning indicator on the FLD, VR3
4, * Tuning LED is lit.

Akai AX-890 Specifications

General

Brand	Akai
Model	AX-890
Category	Stereo System
Language	English