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6. FM Muting Level Adjustment
Turn the variable resistor R212 until the word TUNED is not shown in the display. Then adjust the resistor R212 in the
opposite direction until TUNED is shown in the display.
Step
Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment
Point
Adjustment
Value
1
Signal generator output to FM
antenna terminal. (75
W
)
98 MHz
6.3
m
V (16 dB)
MONO 1 KHz/
Dev. 40 KHz 53.3%
(Europe)
MONO 1 KHz/
Dev. 75 KHz 100%
(USA)
98 MHz
(P2)
R212
“TUNED”
indicate on FLD
2
Over mentioned level
+3 dB
AUTO
SCAN
Only Confirm
“TUNED”
indicate on FLD
7. FM STEREO Distortion Adjustment
Adjust the L channel with the RF signal modulated only L channel first and confirm the R channel with the RF signal
modulated only R channel.
Step
Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment Point
Adjustment
Valve
1
Signal generator
output to FM antenna
terminal. (75
W
)
98 MHz
500
m
V (54 dB)
L or R 1 kHz/
Dev. 40 kHz 53.3%
PILOT 19 kHz/
Dev. 6 kHz 8% (Europe)
L or R 1 kHz/
Dev. 67.5 kHz 90%
PILOT 19 kHz/
Dev. 6.75 kHz 9% (USA)
98 MHz
(P2)
IF COIL
in
FRONT END
Distortion level
Minimum
at TAPE-OUT
2
R218
Distortion level
Minimum
at TAPE-OUT
REMARK: Adjustment with R218 is not necessary when the distortion level is less than 0.5% with adjusting IF coil.
8. FM STEREO Separation Adjustment
Step
Input Signal Source
Connection
Signal
Frequency
Source Signal Output
Level and Modulation
Reception
Frequency
Adjustment
Point
Adjustment
Value
1
Signal generator output to FM
antenna terminal. (75
W
)
98 MHz
Same specification as
FM STEREO distortion
adjustment.
Input only L channel
98 MHz
(P2)
R211
Output level
Minimum
at TAPE-OUT
channel R
2
98 MHz
Same specification as
FM STEREO distortion
adjustment.
Input only R channel
98 MHz
(P2)
R211
Output level
Similar as Rch
at TAPE-OUT
channel L
9. On Screen Display VCO Adjustment
Step
Input Signal Source and
Connection
Measuring
Position
Measuring Equipment
Input
Selector
Adjustment
Point
Adjustment
Value
1
Color bar or other standard
video signal.
Video signal generator
output to LD video input.
IC QX60
26pin and
GND
DC voltmeter
(Impedance > 10k
W
/V)
LD
CX67
2.5V
±
0.1V
REMARK: Connect the TV monitor to the monitor output terminal of the product.
1 9
Harman Kardon
Dolby Digital Audio/Video Receiver
AVR75/85
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