Harman Kardon HK690I - Additional Controls and Indicators; Tone Adjustment Controls; Balance and Tape Operation Controls; Source Selection and Memory Functions

put
d indi-
dB
3. FM ALIGNMENT
Conditions: Set the function switch to FM.
Set the muting switch to off (m=).
step| Item Connections required Alvan ‘Adjustment method
Adjust so that the wave-
4 Connect the FM signal generator |98.14MHz| 98.1MHz | 1201 (A) | forms in steps 1 and 2
- (1kHz 100% modulation) to FM i beconie the same level:
A ie 3002 BAL ANT terminals At this time tuned indi-
2 | discrimi. | through the 3009 balanced 98.06MHHe| 98.12 | T201 (A) | At this tr
nator dummy. z
| adjustment | «Connect the oscilloscope and ‘Adjust so that the dis-
3 distortion meter to TAPE 1 OUT | 98-1MHz | 98.1MHz | 7201 (8) | tortion becomes mini-
terminals. mum.
4 Repeat steps 1 through 3.
Tuned Adjust so that the tuned
§ | indicator VR201 indicator lights at 10uV
__| adjustment | , same as above. input.
Connect the DC voltmeter to Adjust so that the DC
Signal TPQ (+) and ground (—). voltage becomes 11V at
6 | indicator VR202 AmV input. And then,
adjustment confirm the five signal
indicator lights.
98.1MHz
7 (unmo- | 98.1MHz VR151 19.00kHz + 0.02kHz
ulation)
Confirm the stereo indi-
8 «Connect the stereo modulator, | 9g. imiz | 98.1MHz | VR351__| cator lights at 302V
(L + R = 45.5%, L — R = 45.5%, +£2dB input.
19kHz = 9%) to FM signal — ~
generator. Set the stereo modu-
PX Apply signal generator output to lator to 19kHz only.
9 si FM 3002 BAL ANT terminals 98.1MHz | 98.1MHz | VR152 | Adjust so that L and R
_
|
Adiustment
|
through
the
3002
balanced
Outpur
level
beams
dummy.
minimum.
Connect the frequency counter to’ Adjust so that the right
TP10 (+) and ground (—-). channel output becomes
Connect the oscilloscope and AC minimum when only the
voltmeter to TAPE 1 OUT left channel of the stereo
10 terminals. 98.1MHz | 98.1MHz | VR301_ | modulator modulated
and so that the left chan-
2 nel output becomes mini-|
‘ mum when only the
right channel modulated.