A/C Head Azimuth And X-Value Adjustment - Panasonic AJ-D400P Service Manual

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1-21. A/C Head Azimuth and X-value Adjustment.

AS shown in the below figure.

-250us ≤ t1 ≤ +250us

-250us ≤ t2 ≤ +250us

A/C Head each screws

VFM3582KM, VFM3682KM

1. Playback the X-value alignment tape.

2. Adjust A/C Head Azimuth (refer to Azimuth adjustment procedure) so that the CTL and Lack part of

CUE(t2) is match in the phase.

3. Confirm the lack track of envelope, and select the HSW correspond with it ( The lack track is correspond

HSW high with L ch).

4. Adjust X-value so that the reference of HSW and CTL trigger (select the next trigger at duty 6 to 4

portion: refer to below figure) are match in the phase(t1). To adjust X-value, loosen the screw C and D,

adjust the hole E by VFK0357. After adjustment tighten the screw C and D with 2.5Kg torque. At this

time adjust the phase simultaneously with Azimuth so that the CTL and CUE phase is kept.

5. Hit the top plate ( portion L as shown in below figure ) of A/C Head lightly by a pointed end of Eccentric

driver , then confirm the phase is not shifted finally.

t1:CUE phase shift

t2:CTL phase shift

TP500:R/P ENV(RF Board)

TP300:R/P HSW (RF Board)

TP505:CUE AUDIO (LCD Board)

TP107:CTL (SERVO Board)

Oscilloscope

VFK0357(Eccentric Driver)

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