Hitachi MX-W50 - GENERAL ADJUSTMENT INSTRUCTIONS; RADIO SECTION ADJUSTMENTS; FM TUNER ADJUSTMENT

MX-W50
GENERAL ADJUSTMENT INSTRUCTIONS
@RADIO SECTION
These adjustments are made after the Upper Case and the FL meter P.W.B. have been removed.
@ Adjustment points
Perform adjustment at least 3 minutes after the power has been switched on.
LINE OUT PHONO AUX MAIN P.W.B.
e@eeeeeceone
IFT
TP.1
SS R109 L153
[AM TRACKING ADy.
oWye~__
R156 TP. 10
T202
AM IF AMP. ADJ.
[AM COVERING ADu.
FM “S”CURVE ADJ.
FM DISCRIMINATOR ADJ.
1¢301 4 Fig. 18
TP.6 4
FM TUNER ADJUSTMENT
FUNCTION: FM FM MODE: MONO
+
@® Sweep Generator &) Signal Generator Oscilloscope Ct) DC Null Meter
Dist.
@ VTVM Frequency Counter —— Distortion Meter
Connection
Sequence
Output
=
Indication
®2eE
|2
©
Q
@®
+—
TP.
2
TP.
1
100k
O.1u
o-
WH)
TP. 3
100k O14
“S$” curve oWt 10.7 MHz pms
ae 2}
FM antenna 4
Discriminator S 3 98 MHz (Nite 3)
60dB
400Hz, 22.5Hz Dev. .
Antenna terminal F
MPX VCO (75 ohms) RT301 19 kHe—t 50 Hz
60 dB Non Mod.