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An excellent document to assist in the repair of my old personal tape player. It includes full circuit diagrams and physical layout drawings and full instructions on disassembly and fault finding.
Well worth the meagre price.
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Very good conversation, Pretty fast Service, wood do it again,
Have paid by Paypal, so i got the Service Manual online after 15 Min.
Very helpfully.
Greeting from Germany,
Hans
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Good-quality scans. Detailed description. I hope I can repair the machine.
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High-quality scanning. Detailed description. Recommend for all technician. A+++
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This is a good quality scan of the original Service Manual from Nordmende, Germany. Contains the circuit diagram, PCB layout, adjust/tune instructions as well. It is NOT in English but in GERMAN language! That was quite right for my german friend from the lower east side in Berlin.
Performance Tests Output Standing Wave Ratio (SWR) Test
thermistor mount that can be operated at two different resistances and can accurately measure the power absorbed. The thermistor mount type Agilent 478A with option H75 or option H76 normally operates at a DC resistance of 200� giving an impedance at RF of 50� and �L close to zero. When the thermistor bridge is set to 100� the RF impedance is 25� giving a nominal � L of 0.33. The effective efficiency of the thermistor mount remains constant under these two conditions so that the power ratio between operation at 200� and 100� can be accurately measured. If the two reflection coefficients are �1 and �2 and these give the power measurements of P1 and P2 respectively (but the available power remains the same) then the two relationships can be equated as follows: Equation 2-6:
P1
1 � �s �1 1 � �s �2 --------------------------- = P --------------------------1 � �1
2 2
2
2
1 � �2
2
Where: Therefore: Equation 2-7:
2 P 1 ( 1 � �2 2 ) 1 � �s �2 ------ ------------------------- = -------------------------P2 ( 1 � � 2) 1�� � 2 1 s1
Where: The left side of the equation can be replaced by the factor M as follows: Equation 2-8:
1 � �s �2 M = -------------------------1 � �s �1
2
2
Where: This cannot be directly solved for �S because it is a complex quantity. In order to solve for � S additional values of load reflection coefficient are required with a phase difference of approximately 120o. However an approximate solution using two values of �L can give adequately accurate results provided the phase angle of the source is within ±40o of 0o or ±180o.
Agilent E4416A/E4417A Service Guide
2-29
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