Sony CCD-TRV312 Operating Instructions (primary manual), Service Manual, Page: 173 / 212

6-48
2-2. TAPE PATH ADJUSTMENT
Purpose :
Adjusts the head linearity.
Adjustment Error :
Noise appears on top and bottom of display
when playing back the tape recorded by other
machines.
1. Preparations for adjustments
1) Clean the tape running surface (tape guide, drum, capstan, pinch
roller).
2) Connect the adjustment remote commander to the REMOTE
terminal (JACK block).
3) Set the NORM-ADJUST (HOLD) switch to ADJUST (ON)
position.
4) Check that the main power is being supplied.
5) Select page : 6, address : 00, set data : 01 and press the PAUSE
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
.
9) Playback the tracking alignment tape.
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 .
11) After completing the adjustment, perform “2-1-4. Processing
after operation”.
VC-188 board CN102
1 PB RF
2 REC 2
3 GND
4 EMPH IN
5 CAM Y IN
6 DEEMPH OUT
7 BPF ADJ
8 RF SWP
9 CAP FG
S reel
TG-1
TG-2
TG-3
TG-4
Capstan
Pinch roller
T reel
Drum
Normal
Input side is
faulty
Output side is
faulty
Input side
Exit side