33
10. Audio Output Confirmation (AC Head Tilt/Height
Adjustment
Test Points:
Audio Out
Audio Out Jack
Observe:
Oscilloscope
1). Connect the oscilloscope to the audio output jack on VCR.
2). Playback the 400-1000Hz Audio Alignment Tape.
3).Confirm that the audio output signal is between –8dBm and
–10dBm.
NOTE:
If the audio signal is not within the specification, readjust the
A/C Head Tilt Screw and the A/C Head Height Nut slightly to
maximize the audio output. Refer to Fig. 11 for adjustment
screw location.
11. AC Head Azimuth Adjustment
Test Points:
Audio Out
Audio Out Jack
Observe:
Oscilloscope
1). Connect the oscilloscope to the audio output jack on VCR.
2). Play back the 400-1000Hz Audio Alignment Tape.
3).Adjust the AC Head Azimuth Screw for maximum audio out-
put (specification = –12dBm to 14dBm). Refer to Fig. 11 for
adjustment screw location.
4).After completing the adjustment procedure, reconfirm "Fine
Adjustment of Envelopes at Drum Entrance/Exit Parts".
12. X-Axis Adjustment (Fig. 19)
Test Points:
CTL Pulse Test Pin
Path Adj. Fixture
Envelope Test Pin
Path Adj. Fixture
Observe:
Oscilloscope
Adjust:
VR Control
Path Adj. Fixture
S/T Guide Rollers
Transport Mech.
1).Connect the Path Adj. Fixture to PT01 on the Main circuit
board.
2).Play back the Alignment Tape (Color Bar Signal).
3. Connect the channel-1 scope probe to the CTL pulse test pin
on the Path Adj. Fixture.
4).Connect the channel-2 scope probe to the envelope test pin on
the Path Adj. Fixture. Externally trigger the scope using the
SW pulse test pin on the Path. Adj. Fixture.
5).Adjust the VR Control on the Path Adj. Fixture to its center
range position.
6).Using a flat blade screwdriver, adjust the X-Axis Position
Point by turning Adjust Boss so that the envelope waveform
is as shown in Fig. 19 when the VR Control on the Path Adj.
Fixture is turned fully CCW or CW.
7).After completing the adjustment procedure, perform the
"Playback Phase Adjustment".
Fig. 19 X-Axis Adjustment
Summary of Contents for DV- K504N-SJ
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Page 60: ...59 ELECTRICAL ADJUSTMENTS Fig 1 Circuit Board Location...
Page 92: ...91 INTERCONNECT WIRING DIAGRAM K584N K484N K384N K284N...
Page 93: ...92 POWER SUPPLY SCHEMATIC DIAGRAM FREE VOLTAGE K584NY SJ M K584NZ SJ M K584NZ SG M...
Page 95: ...94 2HD HEAD AMP SCHEMATIC DIAGRAM K384N K284N K304N...
Page 96: ...95 4HD HEAD AMP SCHEMATIC DIAGRAM K584N K484N K504N...
Page 97: ...96 VIDEO AUDIO SCHEMATIC DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 98: ...97 PIF INPUT SELECTOR SCHEMATIC DIAGRAM 9V USE K584NY SJ M K584NZ SJ M K584NZ SG M...
Page 100: ...99 TIMER SYSCON SCHEMATIC DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 101: ...100 POWER SUPPLY BLOCK DIAGRAM FREE VOLTAGE K584NY SJ M K584NZ SJ M K584NZ SG M...
Page 103: ...102 2HD HEAD AMP BLOCK DIAGRAM K384N K284N K304N...
Page 104: ...103 4HD HEAD AMP BLOCK DIAGRAM K584N K484N K504N...
Page 105: ...104 VIDEO AUDIO BLOCK DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 106: ...105 PIF INPUT SELECTOR BLOCK DIAGRAM K584N K484N K384N K284N K504N K304N...
Page 109: ...108 MAIN PCB 2HEAD 4HEAD...
