This document is just what I was looking for, it´s very useful, it contains adjustment procedures for the final stage of the power amp and also
has a complete wiring diagram and description of the main semiconductors used in the design.
Dear Sirs,
Thank you for the fast support, the manual does provide all necessary information to repair the radio. All schematics are in a good quality for reading.
The manual fits 100% to my requirements as a technican.
Kind regards Thomas
Text excerpt from page 9 (click to view)
Pin No.
44 45 46 47 48
Pin Name
HI-SP L POWER ON DSL 1 DSL ON BS MODE IN
I/O
O O O O O H : HI-SP L level H : POWER ON
Description
L : HI-SP H level L : POWER OFF
Output ON when in DSL 1 mode. (Not used) Output ON when in DSL ON mode. (Not used) H : Continues playback. BS enable L : Auto reverse playback. BS disable
ADJUSTMENT
1. Tape Speed Adjustment Settings : � Test tape : TTA � 100 (Tape center) � Test point : Phones Jack (J101) � Adjustment location : SFR301 � Dolby : OFF � DSL : OFF � Tape selector : NORMAL(AUTO) � Volume : Non � clip (MAX � 10 dB down) Method : Play back the test tape and adjust SFR301 so that the frequency becomes 3015 Hz ± 10 Hz. Then confirm WOW is less than 0.50%. TTA � 200 TP1(LCH), TP2(RCH), OFF NORMAL(AUTO) OFF MIN Soldered patterns �~ �
Procedure : Short the patterns via solder as shown in the table so the Dolby NR level is 32 mV ± 1.0 dB. Adjust so the specifications are satisfied in both the forward and reverse directions. Connect 10mF/16V coupling capacitors between test points and test equipment (connect the positive terminals to the test points). SOLDER PATTERN �~ � SOLDER POINT INCREASE LEVEL � only + 0.8 dB � only + 1.6 dB � and � + 2.3 dB � only + 0.8 dB � only + 1.6 dB � and � + 2.3 dB
