X-Value Adjustment; Adjustments After Replacing Drum Assembly - Hitachi DV-RV8500E/UK Service Manual

Adjustment / Maintenance > Deck Mechanism Adjustment

5-3-3 X-value adjustment

1) Connect oscilloscope CH-1 to the H/SW
terminal on VCR P.C.B, and CH-2 to the RF
terminal.
2) Use CH-1 (H/SW) to trigger the oscilloscope.
3) Play back the color-bar portion of alignment
tape, and activate auto tracking.
4) Slightly loosen the screw that secures the A/
C head (do not loosen excessively).
5) Insert a 3-4 Philips (+) screwdriver into the
hole in chassis of X-value adjustment
mechanical block, tilt the screwdriver to the
left and right until the CH-2 FM ENV
output is maximal.
6) Tighten the securing screw.

5-3-4 Adjustments after replacing drum assembly

After replacing the drum assembly, check and adjust the following:
1) Guide roller height adjustment
2) X-value adjustment
3) Head switching adjustment
(CH2) (CH1)
RF H/SW
VCR P.C.B
(a) Connection Diagram
X-VALUE Adjusting SLIT
Fixing Screw
A/C Head Ass'y
(b) Adjustment screw diagram
Fig. 5-3-5 X-Value Adjustment
5 - 5
Oscilloscope
CH-1 CH-2
H/SW RF
(VCR P.C.B)
(VCR P.C.B)
Hole in Chassis
Left
Right