Mitsubishi E-45P Service Manual page 10

ADJUSTMENT PROCEDURE FOR DA.R4s,P
Before adiustmont
.
Set the modulation of the AM signal generator to 4OOHZ, 3096.
Connect the AM test loop antenna to the AM signal generator.
o Set the modulation of the FM signal çnerator to 1kHz, 1OO%.
Each set cannot be adjusted
The commander is necessary
indipendently. The sets must be connected with the signaf cable.
for operation.
No.
Measured
item
InpuVOutput and procedure
Point of
adiustment
Adiustment for
Remarkt
1 AM
I F
Adjustment
.
Set the AM signal generator to 999kHz
t0.SkHz and radiate to LB by means of the
AM test loop antenna. (signal level 100d8/m)
o Connect the AC voltmeter to TPI (L ch) or
T P 2 ( R c h ) a n d T P 3 ( G N D ) .
.
Set the function to the MW position and
999kHz in the state of reception.
T1
12
Adjust so that
the output is
maximized.
2
FM
I F
Adjurtment
o Set the FM signal generator to 98.00MH2 and
connect it to the FM antenna terminal through
the 300S1 balanced dummy. (signal level l mV)
o Set the function to the FM position and
98.00MH2 in the state of reception.
o Connect the distortion meter to TPI (L ch) or
T P 2 ( R c h ) a n d T P 3 ( G N D ) .
.
Connect the DC voltmeter to TP4 and TPS.
L3
Adjust so that
the output
voltage becames
0v r 0.05v.
3
L2
Adjust so that
the distortion is
minimized.
4
Adjust by repeating the steps 2 and3 alternately so that the output voltage becomes within the
specified range and the distortion is minimized.
5
MW
Cover4e
Adjustment
. With the function set to the MW position, set
the unit in the reception state whose minimum
receiving frequency is 522kHz.
o Connect the DC volmeter to TPG and TP3
( G N D ) .
L 7 Adjust so that
the output
voltage becomes
1.0vr0.05v.
6
o As in the above step, set the unit in the recep-
tion state whose maximum receiving frequency
i s 1 6 1 l k H z .
TCl Adiust so that
the output
voltage becomes
9.OVr0.1V.
7
Adlust by repeating the steps 5 and 6 alternately so that the output voltage becomes within the
specified range.
I
MW
Tradcing
Adjustment
o Radiate each of the tracking point frequencies
given below from the AM test loop antenna
to L8. (signal level 56dB/m)
o Receive each of the tracking point frequencies
given below by means of the Ten key or Tuning
Up/Down Switch.
.
Connect the AC voltmeter to TPl (L chl or
T P 2 ( R c h l a n d T P 3 { G N D ) .
'
Tracking point frequency
1404kHz
999kHz
603kHz
L8
TC2
Adjust so that
the output
is maximized
at each tracking
point.
I
Repeat adiustment at each tracking point alternately.
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