Is output
voltage of IC1 pin 37
(TP35) approx.
1.3 V *1
Is voltage
on both sides of R5
at least 0.025 V?
1
NO
YES
NO
YES
Faulty optical pickup
Is there
output from IC3
pin 92?
Is voltage of
IC1 pin 2 (left side of R8)
approx. 1.9 V?
*1
Is voltage
on both sides of R5
at least 0 V?
Is voltage
of IC1 pin 36
2.6 V? *1
YES
Is current
flowing equal to at
least 1.2 times value
indicated on pick
FPC? *2
2
YES
NO
Is output of
IC3 pin 92 OK?
Is voltage of
IC1 pin 2 (left side of R8)
approx. 1.9 V?
*1
NO
YES
NO
YES
NO
YES
3.3V
0V
3.3V
0V
NO
YES
NO
YES
*2: Indicated value:
Current equal to that on both
sides of R5 divided by 1
™
Faulty IC1
Is voltage
of IC9 pin 3
2.6 V?
YES
Faulty L5
Faulty IC9
NO
NO
Faulty IC3
Faulty IC1
Faulty optical pickup
For measurements of IC1,
refer to the item 8.5.2. of
"Operation Checks and
Component Replacement
Procedures".
*1:
Faulty Q1
Faulty optical pickup
Faulty IC1
Faulty IC3
Faulty optical pickup
Summary of Contents for SJ-MD150
Page 5: ...4 Caution for AC Mains Lead 5 ...
Page 10: ...10 ...
Page 15: ...15 ...
Page 16: ...16 ...
Page 17: ... Check the MD servo P C B B side as shown below 17 ...
Page 19: ...19 ...
Page 20: ...20 ...
Page 21: ...21 ...
Page 22: ...8 7 Replacement for the belt and loading motor Follow the Step 1 Step 3 of item 8 1 22 ...
Page 23: ...23 ...
Page 25: ...25 ...
Page 36: ...30 TEST02 Test terminal Not used open 36 ...
Page 48: ...48 ...
Page 57: ...20 MD Mechanism Unit Parts Location 57 ...
Page 58: ...21 Packaging 58 ...
Page 59: ...F000300000YM KH 59 ...
