I PURHASED THIS PRODUCT BECAUSE I WAS HAVING PROBLEMS WITH MY CDR20 HARMAN KARDON RECORDER. WHICH I PURCHASED NEW 12 YEARS AGO. AFTER REVIEWING THE MANUAL, I WAS ABLE TO ADJUST THE TENSIONER IN THE SYSTEM. WORKS LIKE A CHAMP!.
SAVED ME AT LEAST 100.00 WHICH WAS WHAT A SERVICE REPAIR STATION WANTED. GREAT MANUAL EASY TO READ. SPECIALLY AFTER I PRINTED THE PAGES WHICH DEALT WITH MY RECORDER. THANKS A LOT!!!!!!!!
I have never bought a service manual which is as competely readable as this althogh it was a scanned pdf. Thank you for this succesful manual also cheaper than other sites.
Text excerpt from page 17 (click to view)
Note:
Connect a probe (10: 1) of the oscilloscope test point for adjustment. Connect ground ( ) terminal of oscilloscope probe to TP3 (VREF) for all adjustment.
2. Tracking Balance Check
Oscilloscope (DC range)
1. Focus Bias Adjustment Make the focus bias adjustment when replacing and repairing the optical block.
Oscilloscope (DC range)
TP1 (TE) TP3 (VREF)
+ –
TP2 (RF) TP3 (VREF)
+ –
1) Connect an oscilloscope to test points TP1 (TE) and TP3 (VREF). 2) Start up the CD test mode. 3) Insert the test disc TCD-782 (YEDS-18) and enter the traverse mode of the CD test mode. 4) Confirm that the traverse waveform on an oscilloscope is vertically symmetrical as shown in the figure below. 5) After confirming the waveform, release the CD test mode.
1) Connect an oscilloscope to test points TP2 (RF) and TP3 (VREF). 2) Turn on the power switch. 3) Insert test disc TCD-782 (YEDS-18) and play back the second program. 4) Adjust SFR101 so that RF signal of the test point TP2 (RF) is MAX and CLEARREST.
A VREF B A=B
MAX 1.4 ± 0.1 Vp-p 0V EYE PATTERN must be CLEAR and MAX
VOLT/DIV: 20mV TIME/DIV: 1mS
VOLT/DIV: 0.5V TIME/DIV: 0.5µS Note: The current of the laser signal can be checked with the voltages on both sides of R46 (voltage across 10Ω). The difference for the specified value shown on the label must be within ± 6.0mA.
