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COMMODORE TECHTOPICS

Issue 1, 1984 : Datasette 1

Model: 1530, 1531

PROBLEM: External noise interfereces cause a LOAD ERROR with some newer model datasettes. An engineering change has been issued; however, the possibility remains that some units have reached the field uncorrected.

SOLUTION:

PCB Assy #CMR-001-0 PCB Assy #017-5001-01 PCB Assy #NP-090
1.REMOVE the 150pF cap at C4 and REPLACE with a Ceramic 470pF 50WV 1.REMOVE the 150pF cap at C4 and REPLACE with a Ceramic 470pF 40WV 1.Check C4 for 470pF cap
2.ADD C9 across R17 and R18 2.ADD C9 across R17 and R18
Note: use pins on SW1 - resistors are printed type
2.ADD C9 across R1 and R2

[Schematic] [Schematic]
PCB Assy #:
CMR-001-0
017-5001-01
PCB Assy #:
NP-090

Note - Correct values:

C4 Ceramic capacitor .470pF +/- 20% 50 Working Volts
C9 Ceramic capacitor .0033uF+/- 20% 50 Working Volts


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This page has been created by Sami Rautiainen.
Read the small print. Last updated January 19, 2006.