Service manual

24
K. Adjustment of the AUDIO AZIMUTH
a. Connect the AUDIO output JACK with an
AUDIO LEVEL METER.
b. Play back the ALIGNMENT TAPE(DP-2:STAIR
STEP 6KHz Signal).
c. Check if the AUDIO output signal level is over : -
9 ~-3dBm.
d. If the requirement of “c” is not satisfied, readjust
the AZIMUTH SCREW of the AC HEAD until
the AUDIO output is maximum.(Fig. 5.4)
e. Repeat at “Adjustment of the wave form of
DRUM Entrance/Exit”
L. X-POSITION
a. Connect the PT01 on the MAIN CIRCUIT
BOARD with a PATH ADJ.FIXTURE.
b. Play back an ALIGNMENT TAPE(DP-2: STAIR
STEP Signal).
c. Connect theS/W PULSE TEST PIN on the PATH
ADJ.FIXTURE with a CHANNEL-1 SCOPE
PROBE.
d. Connect the VIDEO OUT on the MAIN
CIRCUIT BOARD with a CHANNEL-2 SCOPE
PROBE(1V/div)
e. Check if the ENVELOPE is maximum when the
VR CONTROL on the PATH ADJ. FIXTURE is
in CENTER.
f. If not, readjust the X-POSITION by referring to
subitem “E”(Adjustment of the X-POSITION).
g. Repeat the process of subite, “F(PLAYBACK
AUDIO OUTPUT AUDIO OUTPUT JACK
AUDIO LEVEL METER
Test Point
Measurement Equipment
S/W PULSE TEST PIN PATH ADJ. FIXTURE
ENVELOPE TEST PIN PATH ADJ.FIXTURE
Measurement Equipment OSILLOSCOPE
VR CONTROL PATH ADJ.FIXTURE
S/T GUIDE ROLLER
TAPE TRANSPORT SECTION
Test Point
Adjustment