Everything in the manual was excellent except for a couple of pictures of specific areas in the unit that were a little dark. Owners Manuals re-sent the pdf file & the problem was corrected. Excellent product! George
This is the original manufacturers service manual, with detailed info on the circit boards, explosion drawings of all parts in assembly order, and tuning instructions. The only thing missing is the information on the dimensions of the various drive belts. mail me if you need them. gcrossman_at_aol.com
This is a high quality manual with clear schematic and components layout diagrams ; with service procedure included.
Text excerpt from page 24 (click to view)
B CD C.B
A MAIN C.B
< CD SECTION >
1. Focus Bias Adjustment Make the focus bias adjustment when replacing and repairing the optical block.
Oscilloscope (DC range)
EYE PATTERN must be CLEAR and MAX VOLT / DIV: 200mV TIME / DIV: 0.5Âµs MAX
TP3 (RF) TP4 (VREF)
< TAPE RECORDER SECTION >
2. Bias Adjustment â¢ Test tape: TTA-630 â¢ Test Point: TP2 â¢ Adjustment location: L801 â¢ Method: L801 .............................................................. 85kHzÂ±2kHz 3. Azimuth Adjustment Condition: â¢ Test tape: TTA-320 â¢ Test point: PHONE JACK â¢ Adjustment location: Azimuth adjustment screw Method: Play back the test tape and adjust the screw so that the output is maximum.
1) Connect an oscilloscope to the test point TP3 (RF) and TP4 (VREF). 2) Turn on the power switch. 3) Insert test disc TCD-782 (YEDS-18) and play back the second composition. 4) Adjust SFR430 so that RF signal of the test point TP3 (RF) is MAX and CLEAREST.