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1. Measure the voltage at TP605 in the Eject mode. ( V eject )
2. Playback a 25M Master Tape.(A picture is not appeared on the
monitor. )
3. Set the items in the Service Menu as follows.
D01 PB PLL PHS L : 0
D02 PB PLL SL L : -20
D41 VITERBI MODE : OFF
B42 PB MODE : PB H
4. Measure the Voltage at TP503 ( V play )
5. Adjust B31 PB PLL VCO L so that the voltage is in the specification.
6. Confirm the red segment is not displayed on the Error meter of L1
and L2.
7. If it is not, adjust D01 PB PLL PHS L and D02 PB PLL SL L and
return to the step 5.
6.6.7. PLL Lock Confirmation (25M Mode, RP Lch)
Board
Specification
Test Point
Adjustment Point
Input Signal
Mode
Tape
M.EQ
1. Measure the voltage at TP505 in the Eject mode. ( V eject )
2. Playback a 25M Master Tape.
Note:
A normal picture is not appeared on the monitor.
3. Set the items in the Service Menu as follows.
D15 RP PLL PHS L : 25
D16 RP PLL SL L : -5
B42 PB MODE : RP H
4. Measure the Voltage at TP505 ( V play )
RF EQ (H3)
V play - V eject <= ±
0.05V
TP505
Service Menu
Playback
VFM3580KM (Color Bar
Portion)
Oscilloscope
104
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