Mitsubishi da f603

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MI I SU BISHI I,
A AUDIO SYSTEMS
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CONTENTS

SPECIFICATIONS ............................................................. 2
FRONT PANEL TERMINOLOGY AND FUNCTIONS .................................... 2
DISASSEMBLY PROCEDURES .................................................... 3
ADJUSTMENTS ............................................................... A
INTERNAL DIAGRAMS AND PINOUT OF INTEGRATED CIRCUIT ........................ 3
BROOK DIAGRAM ............................................................ 10
WIRING DIAGRAM ............................................................ I'I
SCHEMATIC DIAGRAM ......................................................... 13
PRINTED CIRCUIT BOARDS ..................................................... 15
EXPLODED VIEW OF CABINET .................................. x ............... 17
PARTS LIST ................................................................. 18

AMITSUBISHI ELECTRIC CORPORATION

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A.-F603

ADJUSTMENTS
No 1:2:1 Input/Output and procedure Azarnnfim AdII-lflmml '0'
, 1 AM 0 Set the IF sweep frequency to 455kHz T5 Adjust T5 and T8 so that the
I IF j C Connect IF sweeps OUT terminal to TB waveform is maximum and
2 Adjustment j loop antenna E symmetrical as in Fig. 4.
[MW model i Connect IF sweep's IN terminal to TPl. I
(Fig. 5i
2 FM 0 Set the IF sweep frequency to 10.7MHz. T6 Adjust T6 and T7 so that the
r IF 0 Connect lF sweeps OUT terminal to T7 . sweep waveform is maximum
. j Adjustment the FM antenna terminal through the 3009 and symmetrical as in Fig. 5.
'V [FM mode] balanced dummy. (signal level 1 mV)
f (Coarse) IF sweep's IN terminal to TP2 and
l IF sweep's ground terminal to TP7 (GND)
lFig. 7i
3 FM VCO l 0 Connect digital voltmeter across TPS
Check and TP7 (6ND) (Fig, 8)
j l 0 Set the function to the FM position, the
1 reception frequency to BSMHZ and check
that voltage is 1.6 1 0.05V.
'. I Set frequency to 108MHz and check that
'~ I the voltage is 8 t OOSV.
. r
4 FM IF r 0 Set the FM signal generator to SSMHz and TE I Adjust for minimum distortion.
j Adjustment connect to the FM antenna terminal T7
[FM model through the 3009 balanced dummy. (Signal
(Fine) level 1 mV)
0 Set the function to the FM position and the
reception frequency to QBMHz.
l 0 Connect a distoution meter to the audio
I: output of the onetouch connector, (Fig. 9)
5 MW VCO 0 Connect digital voltmeter across TPS and T3 Adjust T3 until voltage becomes
1' Adjustment TP7 (GND). (Fly. 8) 0.9 1' 0.05V.
I 0 Set the function to the MW position, and
the reception frequency to 522kHz (min.
ll frequency).
l I 0 Set the reception frequency to 1,611kHz TC3 Adjust T63 until voltage becomes
, (max, frequency). 9.14 i 0.05V.
0 Repeat the above adjustments two or three times until both adjustments are at best level.
6 MW 0 Radiate each of the tracking point fre~ TI Adjust so that the output is
Tracking quencies given below from the AM test loop TCI maximum at each tracking point,
Adjustment (signal level 56dB/mi
0 Receive each of the tracking point Ire-
I . quencies given below by means at the key
-'- or Tuning Up/Down Switch.
0 Connect the AC voltmeter to the audio
output of onetouch connector. (Fig. 10)

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