Adjustment Procedures - Harman Kardon FL8550 Service Manual

ADJUSTMENT PROCEDURES

Reference Disk for adjustments: Sony YEDS - 18
Mode: FL8550
Testing Equipment:
i. 5020 Frequency Response Analyzer
ii. Oscilloscope
iii. Frequency Counter
iv. Frequency Generator (Kenwood AG-203A)
Adjustment Procedure
(A) Focus Adjustment
i. Connect Jitter Meter between TP1 (R51) and Vref (J6), then play a CD disc.
ii. Adjust VR1 until Jitter Meter get the minimum point.
iii. Connect Oscilloscope as the same as the last step. Waveform will be read as
diamond shape and voltage is about 1.1v as perfect. (see the figure 1)
Fig. 1
21
FL8550