Marantz SR5000, Service Manual

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6. ADJUSTMENT PROCEDURE
ALIGNMENT INSTRUCTIONS
(1) EQUIPMENT NEEDED
AM Standard Signal Generator
FM Standard Signal Generator
Oscilloscope
VTVM (AC,DC)
AM Test Loop Antenna (AM Adjustment)
FM Dummy Antenna (FM Adjustment)
Stereo Signal Generator (RDS IN : EUROPE ONLY)
Frequency Counter
Distortion Analyser
(3) AM RF ADJUSTMENTS
Signal generator : Connect to the AM Ant.
Coil through the loop antenna.
Adjust for the indication of VTVM of the wave form of scope
to be maximum.
Band NO Frequency Adjust for Adjustment
1 612 kHz
Max sensitivity
L12,T13
2 1503 kHz Max sensitivity CT1
3 Repeat steps 1 and 2 several times.
AM
Band NO Frequency Adjust for Adjustment
1 610kHz
Max sensitivity
L12,T13
2 1510 kHz
Max sensitivity
CT1
3 Repeat steps 1 and 2 several times.
AM
/U1B
/N1B, /K1B
FM-SG
MHz
Choke coil
output
DC EVM
UNIT
TP12
TP13
DISTORTION
ANALYSER
OUT
100 H
FM 75ome in
FM Dummy
Modulation Modulation freq.
1 kHz
1 kHz
AM
FM (EUR, OVC)
SR5000/N1B
SR5000/K1B
FM (USA)
SR5000/U1B
30 %
MONO : 40 kHz DEV.
STERO : L=R (40 kHz), PILOT (7.5 kHz) 47.5 kHz DEV.
RDS : RDS (1.2 kHz) 48.7 kHz DEV.
MONO : 75 kHz DEV. (100 %)
DTEREO : L=R (67.5 kHz), PILOT (7.5 kHz)
400 Hz
Item
Band
IMPORTANT
1.Check power-source voltage.
2.Set the function switch to band aligned.
3.Keep the signal input as low as possible to adjust accurately.
4.Modulation and modulation frequency.
NO Band Frequency Adjust for Adjustment
1 FM 87.50 MHz 1.6V L7
AM 522 kHz 1.0V L13
AM 520 kHz 1.0V L13
2
(2) FM, AM TRACKING VOLTAGE ADJUSTMENTS
AM,FM DC Voltmeter : Connect to test point TP1 and GND
FM
AM
GND
GND
TP1
DC EVM
UNIT
(4) FM RF ADJUSTMENTS
Signal generator : Connect to FM Ant. (FM 75 ohm) through
the dummy.
Adjust for indication of VTVM of the wave form of scope to
be maximum.
(5) FM MONO DISTORTION ADJUSTMENTS
Signal Generator : Connect to FM Ant. (FM 75 ohm) through
the dummy.
DC Voltmeter : Connect to TP2(+),TP3(-) through the choke
coil (100uH).
Distortion Meter : Connect to output L or R.
Band NO Frequency Adjust for Adjustment
1 100.10 MHz Max sensitivity L2,L5,L6,T1
3 Repeat steps 1 several times.
FM
Band NO Frequency Adjust for Adjustment
1 100.10 MHz DC Voltmeter 0V T11
2 100.10 MHz Minimum T.H.D T12
3 Repeat steps 1 and 2 several times.
FM
AM-SG
AM LOOP antenna
60cm
kHz
OUTPUT
terminal
AC EVM OSCILLOSCOPE
FM-SG
UNIT
OUTPUT
FM 75ome in
FM Dummy
MHz
OUT
AC EVM OSCILLOSCOPE
TUNER ADJUSTMENT POINT