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The ease of this purchase was a good start. The content of this manual was exactly all I needed to retore my Tandberg 64.
All of the mechanical and electrical information is contained in the manual and the quality of the document makes reading the data easy.
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I found this manual to be complete in every detail. Besides the schematic it has a complete set of alignment instructions which are easy to understand. It also includes a complete parts list as well as an explanation of how the power supply and safety shutdown circuits operate. Even a schematic of the tuner is included.
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The product was good and just what I needed, however I had moderate difficulty with the down load because the sight would not recognize my pass word. I was finally given a direct link to the manual and that worked.
RDA-7.1 ADJUSTMENT PROCEDURE-1
BIAS & DC Offset Adjustment
1. Connect the assembled channel to the power transformer. 2. Connect the power cord into an AC wall outlet. 3. Turn ON the unit. After about 3 seconds the two green LED's should turn ON. Measure the following voltages and make sure they are within the specifications. C7 (+) : 70 V +/- 3 V C9 (-) : -70 V +/- 3 V L1 : 0 V +/- 0.1 V 4. Connect the DC voltmeter to the test points TP1 (-) and TP2 (+) and adjust the voltage to 4 mV using the R46 BIAS adjustment trimming resistor. 5. Allow the channel to warm up for 30 minutes, adjusting the bias currents every 10 minutes. 6. Measure the output DC voltage and adjust it as close to zero as possible using the R24 trimming resistor.
Main Chassis Check
1. 2. 3. 4. 5. 6. 7. Assemble the chassis / power supply. Connect the power cord into an AC wall outlet. Turn ON the unit. The blue ON LED should come ON. Turn OFF the unit and plug a remote control plug into the Remote IN jack. Turn ON the unit. The Red Standby LED should be ON. Apply 12V to the remote control plug. The unit should turn ON, the blue LED should be ON. Measure the secondary voltages on all power cables going to the channels. Each secondary should read 50 VAC +/- 2 VAC.
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