Abgleichvorschriften / Adjustment Procedures
4. CD Part
Measuring instruments: Oscilloscope, Test CD (e.g. 5A).
Function switch: CD
Adjustment
1. Tracking Offset
Oscilloscope to testpoint TP3 (TSO) and ground of the
test probe to testpoint TP1 (V. REF).
2. RF Level
Oscilloscope to testpoint TP2 (RFOUT ) and ground of
the test probe to testpoint TP1 (V. REF).
Insert Test-CD 5A and play track-number 5.
3. Tracking Balance
Oscilloscope to testpoint TP3 (TSO) and ground of the
test probe to testpoint TP1 (V. REF).
Insert and play the CD. Press and hold down button 5 or
6 during the adjustment process.
CD Servo Board
2 - 6
Preparations
Adjustment Process
±
Adjust to 0V
0.9mV with VR704.
±
Adjust to 1.1V
0.2V with VR701.
pp
With VR702 adjust the signal symmetrically to the zero
line.
0
DC
RR 740 CD / RR 770 CD
±
1.1V
0.2V
pp
A
A=B
B
GRUNDIG Service