Denon AVR-1604, Service Manual

Page: 7 / 71

7
7
AVR-1604/684 / AVC-1580
ADJUSTMENT
Tuner Section
(AVR-1804/884 only)
CONNECTION DIAGRAM OF MEASURING INSTRUMENTS
FM
STEREO
MODULATOR
FM SSG
Digital
Voltmeter
75ohm
T402 T403
IC402
VR402
TUNER B'D
R471
20
+14
−
10
dB
AM
T402 T403
IC402
TUNER B’D
R471
VR401
FM ALIGNMENT
Input Output Adjustment
Step
Alignment
Item
Tuning
Frequency
Setting
Type Frequency
Input
Level
Modulation Coupling Type Connect to Points Adjust to
1
Center
Adjustment
98.1MHz
(98.0MHz)
FM SSG 98.1MHz 60dB
µ
Mono
1kHz 100%
Antenna
Terminal Digital
Voltmeter
R471 T402
±
50mV
2 Distortion
98.1MHz
(98.0MHz)
FM SSG 98.1MHz 60dB
µ
Mono
1kHz 100%
Antenna
Terminal Distortion
Meter
Output
Terminal (L)
T403
Minimum
Distortion
3 Repeat Steps 1 and 2
4 Signal Level
98.1MHz
(98.0MHz)
FM SSG 98.1MHz 20dB
µ
OFF
Antenna
Terminal Light “TUNED” on
FL Display
VR402
AM ALIGNMENT
Output Adjustment
Step
Alignment
Item
Frequency Input
Type Connect to Points Adjust to
Remarks
1 Signal Level
999 (1000)
kHz
AM SSG
 
VR401
Light “TUNED” on
FL Display
SSG OUTPUT
74dB
µ
(EMF)