Ctl Head Position Check And Adjustment - Sony BVW-55 Maintenance Manual

5-7. CTL Head Position Check and Adjustment

Note
The CTL head position adjustment is closely related to the AT head position adjust-
ment.
Be sure to check the AT head position when the CTL head position is adjusted.
Tools
. Alignment tape CR2-1B:
. Oscilloscope (Tektronix 2465B or equivalent)
. Nutdriver (d = 4.5 mm):
Preparation
1. Turn the power off
2. Connect the oscilloscope
CH-1 : TP804 (Y RF)/MD-122 board
TRIG : TP807 (Y SW)/MD-122 board
Oscilloscope setting :
CH-1 : 1 V to 200 mV/DIV
TRIG : 5 V/DIV
TIME : 5 ms/DIV
3. Switch setting
Set the switch S100-1 (cassette compartment
lock) on the SV-206 board to ON.
4. Set the alignment tape
Set the CR2-1B and put a weight on the cassette
so that it does not rise up.
Weight about 1000 g is suitable.
BVW-55 P2
8-960-096-01
7-700-751-01
. Connection of the oscilloscope
CH-1 : TP804 (Y RF)
TRIG : TP807 (Y SW)
F E
TP805
TP803
TP802
TP801
5-7. CTL Head Position Check and Adjustment
D C B A
E501
TP807
TP806
TP804
MD-122 BOARD, B Side
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