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good and ok, very nice , good and ok, very nice, good and ok, very nice
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Super manual it contains all the things you need to service your Marantz 2100.
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A very easy to understand and use manual. Well worth the money.
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Very good information with clear drawings. Thanks!
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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.
The exerience with the resource has made this my prime source for technical data.
7 Troubleshooting
7-2-14 ABL Failure
Symptoms : � Full white luminance is too bright. (ABL minium is over 35 F/L) � Full white luminance is too dark. (ABL maximum is under 35 F/L) � The luminance of full white and No Video are almost same.
Display the full white pattern.
Check connections between CN202 and CN202_2.
No
Does full white luminance vary, adjusting ABL step with Softjig? Yes
Yes
Are full white and white square luminance almost same? No
Does the PWM duty of IC202�s Pin 21 vary adjusting ABL step? No Check and replace IC202 and around parts.
Yes
No
Is R121 right as CRT�s differential items? Yes
Replace R121 to higher or lower one that meets the spec.
Replace it.
Does the voltage of IC101�s Pin 8 vary between full white and No Video?
F/W: 4.1~4.3V No Video: 5.3~6.0V
Yes Check and replace IC101.
No Yes Check and replace D518, IC101.
Does T501�s Pin 8 voltage vary between full white and No Video?
F/W: 1.5~3.0V No Video: 5.5~7.0V
No No
Are 12 V line, R504, L504, Q501 and Q518 ok? Yes Are C509, D514, Q502 and Q506 ok? Yes Check and replace T501 and CRT.
Replace it.
No
Replace it.
7-16
CHA42*7L/5**7L
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