Pdr-04 – Pioneer PDR-04 User Manual
Page 65
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
PDR-04
6.3.15 WBL Balance Adjustment
Adjustment 2
' Objective
Symptom when out
of adjustment
To adjust the gain balance of the wobble signal.
Player does not record or search or pause CD-R discs.
• Measurement instru
ment connections
Connect the oscilloscope to
CN104 (TP1), Pin 5 (WBL).
[ This connection must be via a
high-pass filter (180pF+3.9kQ).]
[ Settings ]
5 mV/div.
20 pS/div.
______
pc mode
Player state
• Adjustment
location
Disc
Test mode, play
VR106 (WBL. BALANCE)
(HEAD BOARD assy)
STD-R03
[ Procedure ]
(1) Move the pickup to midway across the disc (R = 35mm) with the MANUAL / TRACK SEARCH FWD ►► or REV
keys.
(2) Press the FINALIZE key, the PLAY ► key, then the PAUSE ll key in that order to close the respective servos and put
the player into play mode.
(3) Adjust VR106 (WBL. BALANCE) so that the amplitude of waveform at CN104 (TPl), Pin 5 (WBL) is minimum.
Out of adjustment
Optimum adjustment
65