2-4. TAPE PATH ADJUSTMENT
2-4-1. Preparations for Adjustment
1) Clean the tape path face (tape guide, drum, capstan shaft, pinch
roller).Normal
2) Connect the adjustment remote commander.
3) Turn on the HOLD switch of the adjustment remote
commander.CH1
4) Select page: 3, address: 33, and set data: 08.
5) Connect the oscilloscope to CPC jig for BX/BK.
Channel 1: PB RF (MON)
Channel 2: SWP
Note:Connect a 75W resistor between the test point PB RF (MON)CH2
and GND.
75W resistor (Parts code: 1-247-804-11)
6) Playback the SW/OL standard tape. (WR5-2D)
7) Check that the oscilloscope RF waveform is flat at the entrance
and exit.
If not flat, perform the following section 2-4-2. until it is flat.Entrance side faulty
8) Perform OProcessing after operations�, after completing
adjustment.CH1
Test point of CPC jig for BX/BK
Pin No.Signal NamePin No.Signal Name
3BL1EVF VCO
7EVF VG5BL 4.75CH2
9PB RF (MON)
13BPF MONI10GND
17TMS15REC RF (RF IN)
20TDI19TDOExit side faulty
16SWP18TCK
8CAP FG14IR VIDEO
Note:Pin No. are those of CN1011 of VC-256 board.CH1
Table 5-2-1.
[Processing after operations]
1) Connect the adjustment remote commander, and turn on the
CH2
HOLD switch.
2) Select page: 3, address: 33, and set data: 00.
3) Remove the power supply from the unit.
Fig. 5-2-2.
5-31 |
ACEC
