2-2. TAPE PATH ADJUSTMENTVC-188 board CN102
1PB RF
Purpose :Adjusts the head linearity.2REC 2
Adjustment Error :Noise appears on top and bottom of display3GND
when playing back the tape recorded by other4EMPH IN
machines.
5CAM Y IN
1. Preparations for adjustments6DEEMPH OUT
1) Clean the tape running surface (tape guide, drum, capstan, pinch7BPF ADJ
roller).8RF SWP
2) Connect the adjustment remote commander to the REMOTE
terminal (JACK block).9CAP FG
3) Set the NORM-ADJUST (HOLD) switch to ADJUST (ON)
position.Input sideExit side
4) Check that the main power is being supplied.
5) Select page : 6, address : 00, set data : 01 and press the PAUSENormal
button.
6) Select page : F, address : 02, set data : 03 and press the PAUSE
button.
7) Turn off the power supply once, then turn it on.
8) Connect an oscilloscope.
CH1: VC-188 board CN102 pin 1.
External trigger : VC-188 board CN102 pin 8.Input side is
9) Playback the tracking alignment tape.faulty
WR5-1NP : NTSC
WR5-1CP : PAL
10) Check to see that RF waveform is flat at input and exit sides on
oscilloscope.
If it not flat. Tape Path Adjustment� of the 8mm Video
Mechanism Section Adjustment Manual B Mechanism .Output side is
11) After completing the adjustment, perform O2-1-4. Processingfaulty
after operation�.
TG-3
Capstan
TG-2
TG-4
TG-1
Drum
Pinch roller
T reel
S reel
6-48 |
ACEC
