i have a few TPSL2's and WM-3's. All have been serviced and cleaned up and work great. But a few of them have that LEFT then RIGHT step in volume when first played. Obvs this can only be a capacitor issue. But I do t want to recap ALL caps, just the main culprits for now. Any pointers as to the caps in question as well as values / location greatly appreciated.
Since you are still waiting for a reply I'll point out that it is normally Electrolytic capacitors (which should contain liquid which can eventually dry out) that have the highest failure rate. Do you know how many there are in the TPS-L2 ?
Just for fun i tried to investigate the issue and reported my findings in this thread http://stereo2go.org/forums/threads/sony-wm-3-amplifier-problem.1466/. Actually i could not pin-point a specific culprit, but my bets are on the Capacitors linking the pre-amp with the power amp (C210/C211 for left channel) or the capacitor in the filter section of the EQ/preamp (C205). It's either those or a faulty pre-amp IC (which i sincerely hope is not the case) My WM-3 will soon be in good hands which, i hope, will be able to fix it. I will report back as soon as i have some news
Doublecee, could you check the DC bias on the IC101 and IC201 on either a WM-3 or a TSP-L2 with the delay problem ? With a voltage meter, just measure the voltage of pin 5 and pin 6 of the two chips versus ground. The two IC's are on the left side of the board, near the play/ffw/rew/stop buttons, pins are numbered from tight to left 1 -> 8. IC above is right channel, below is left channel. Pin 5 bias should be 0.6 V while pin 6 should be 0.9 V; tolerances of +/- 0.2 V are perfectly fine. thanks
