Sharp RX-100H Serviceanleitung Seite 18

| RX-100H
©
6. Adjustment of ATF Offset
Mount a blank tape, record without signals and reproduce
: —
the recorded part.
" Adjusting Setting Instrument Connection
' Part
"VR301- O+50 mv TP13 (ATF offset) :
GND connect an
jig for ATF.
Set VR302 to the same angle.as that of VR301.
7. Checking of Mechanism Linearity
Play back the commercially available music tape.
Checking Setting Instrument Connection
Part
Waveform as shown in | TP1(GND)
Fig. 35-3 | tP2IRF) TP3(HSW)
8. Adjustment of PG Phase
Mount a blank tape, and set record mode.
'Adjusting Setting/Adjusting Instrument Connection _
Part
Sa. J e Magnify the max. TP7(ATF pilot}
amplitude GND
part. Setin TP19(SCK)
the center
of screen.
Apply trigger at TP19, and check TP? with oscilloscope.
Mount an adjusting tape (Sony's TY-711), and set playback mode.
Arrange the ATF
pilot signal of pertinent
track in the same
position as that of
record mode waveform,
and then set it in the
center of the screen.
9. Adjustment of Relative Speed Correcting Circuit
Mount a commercially available music tape, and set
playback mode.
Adjusting Setting/Adjusting Instrument Connection
Part
VR157 Set equal voltage. Output voltage of R286
(5.6 kohm)} BI154
{2) pin (red)
ELECTRONIC VOLTMETER -
MAIN PWB
TP13 |
10k ohm 10k ohm
TP 13 TPI
02~ 38 nF
NP OR
GND
GND
ATF OFFSET
Figure 28-1
OSILLOSCOPE
PG PHASE
_EN NLARGEMENT
PG PHASE
Figure 28-2
ELECTRONIC ELECTRONIC
VOLTMETER VOLTMETER
=99-.
REIATIVE SPEED CORRECTING
Figure 28-3