At Head Head-To-Tape Contact Check - Sony BVW-55 Maintenance Manual

5-11. AT Head Head-to-tape Contact Check

5-11. AT Head Head-to-tape Contact Check
Tools
. Alignment tape CR8-1A:
. Oscilloscope (Tektronix 2465B or equivalent)
. Bamboo stick
Preparation
1. Turn the power off
2. Connect the oscilloscope
CH-1 : TP303 (CH1 PB SIG)/AU-262 board
CH-2 : TP403 (CH2 PB SIG)/AU-262 board
TRIG : TP807 (Y SW)/MD-122 board
Oscilloscope setting :
CH-1 : 200 mV/DIV
CH-2 : 200 mV/DIV
TIME : 1 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 CR8-1A and put a weight on the cassette
so that it does not rise up.
Weight about 1000 g is suitable.
5-40
8-960-097-45
. Connection of the oscilloscope
CH-1 : TP303 (CH1 PB SIG)/AU-262 board
CH-2 : TP403 (CH2 PB SIG)/AU-262 board
TRIG : TP807 (Y SW)/MD-122 board
A B C
TP303
F E
TP805
TP803
TP802
TP801
D E F G
TP403
TP302
TP402
AU-262 BOARD, A Side
D C
B
E501
TP807
TP806
TP804
MD-122 BOARD, B Side
H
1
2
3
4
5
A
1
2
3
4
BVW-55 P2