Alignment Procedures - Harman Kardon 730 Technical Manual

ALIGNMENT PROCEDURES
Step
1
2
3
Step
1
2
3
Step
1
2
3
SEPARATION ADJUSTMENT
INSTRUMENTS: Stereo Signal Generator
VTVM
NOTE: Set Function Selector Switch to FM.
Connect Signal Source to FM Antenna Terminals.
DIAL
FREQUENCY SIGNAL STRENGTH
SETTING
CONNECT OUTPUT TO
98MHz 1mV (60dB) Tune for Zero VTVM to Left
Right Signal Volts DC at Tape Out Jack
R220
(15 kohm)
98MHz VTVM to Right
Left Signal Tape Out Jack
Get best balanced minimum output after repetitive check between right and left above.
STEREO INDICATOR LAMP ADJUSTMENT
INSTRUMENTS: Stereo Signal Generator
NOTE: Set Function Selector Switch to FM.
Connect Signal Source to FM Antenna Terminals.
DIAL
FREQUENCY SIGNAL STRENGTH SETTING OUTPUT
98MHz 32µV (30dB) Tune for Stereo Indicator
(Stereo
Zero Volts Lamp
Signal) DC at
R220
(15 k ohm)
ADJUST
VR302
VR302
ADJUST
VR353
Check Pilot level that Stereo Indicator lights at 6% of pilot level and that the indicator does not light at 1 %.
Return pilot level to 9% and check Stereo Separation at 1 kHz, 100Hz and 1 0kHz.
QUIETING METER ADJUSTMENT
INSTRUMENT: FM Signal Generator
NOTE: Set Function Selector Switch to FM.
Connect Signal Source to FM Antenna Terminals.
DIAL
FREQUENCY
SIGNAL STRENGTH SETTING OUTPUT ADJUST
---
----- Quiet Point Quieting Meter VR351
on Band
---
-----
VR352
98MHz 20µV (26dB) Tune for Zero VR351
Volts DC at
R220
(15 k ohm)
- 3 -
ADJUST FOR
Minimum Output
Minimum Output
ADJUST FOR
Light ON
ADJUST FOR
Needle to Deflect
Over Zero (to Right)
To Indicate Zero
To Indicate 6
I
I>
Step
1
2
3
4
5
6
7
8
9
10
Step
1
FM ALIGNMENT PROCEDURE
INSTRUMENTS: FM Signal Generator modulated with 1000Hz at 100%. (75kHz)
AC/DC VTVM and Oscilloscope.
NOTE: Set Function Selector Switch to FM.
Connect ~ignal Source to FM Antenna Terminals.
DIAL CONNECT OUTPUT
FREQUENCY
SIGNAL STRENGTH
SETTING METER TO
--- - - - - - Quiet Point Oscilloscope to
on Band
R220 (15 kohm)
--- -----
Near -1dB of Limiter Tune for Oscilloscope to
98MHz Saturation Zero Volts Tape Out Jack
DC at
R220
(15 k ohm)
Repeat Steps 2 and 3 until no further improvement is noticed.
90MHz Approx. 10µV 90MHz Oscilloscope to
R220 (15 k ohm)
106MHz Approx. 1 0µV 106MHz
Repeat Steps 5 and 6 until no further improvement is noticed.
90MHz -3dB of Limiter Tune for VTVM and Oscilloscope
Saturation Zero Volts to Tape Out Jack
DC at
R220
(15kohm)
106MHz
Repeat Steps 8 and 9 until no further improvement is noticed.
MPX ADJUSTMENT
INSTRUMENT: Frequency Counter
Signal Generator
NOTE: Set Function Selector Switch to FM.
Connect Signal Source to FM Antenna Terminals.
DIAL
FREQUENCY SIGNAL STRENGTH SETTING CONNECT OUTPUT TO
98MHz 1mV (60dB) Tune for
Frequency Counter
(unmodulated) Zero Volts to LP301
DC at
R220
(15 k ohm)
- 4 -
ADJUST
IF Top
and Bottom
(on Front
End)
T201 Top
T201
Bottom
LO(on
Front
End)
TC0(on
Front
End)
LR1
LR2
LA
TCR1
TCR2
TCA
ADJUST
VR301
ADJUST FOR
Maximum Noise
Zero Volts DC
Maximum Symmetry
on Oscilloscope
Zero Volts DC
Zero Volts DC
Maximum Output
Maximum Output
ADJUST FOR
19kHz ±50Hz