BASF 6106 - Page 65

4.4.
LOCATION OF
TESTPOINTS, IC's,
POTENTIOMETERS AND CONNECTORS
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-TERMINATOR CHIP
POT I FUNCTION
R
47
R 69
Drive Motor Adjust
Jitter Adjust
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Connector
Function
J1
Signal
-
Interface
J2
Read/Write
-
Head
J3
1,3
Head Load
Solenoid
2,4
Door
Lock Solenoid
5,6
Write
Protect
Phototfansistor
7,8
Index
Phototransistor
11-18
SteppeT
Motor
J5 DC-
Connector
J6
2,4
Drive
Motor
3,5,6
Track
Zero
Switch
Test Points
Signal
TJ1
1,2
Write
Current
Signal
3,5
Read Signal
(Preamp. Output)
6
GND
7,9
Read Signal
(Differentiator
Input)
8 Jitter
Voltage
10
Erase
Current
T.P.
11,12
Write Current
T.P.
TJ2
1
DISK CHANGE FF/
2 PWRONRESET/
3
N.O.
TRACK
ZERO SWITCH
4 IN USE-
FF
5 MOTOR
ON
6 TRACK
00
7
GND
8 INDEX
4-15