Teac CT-M511S, Руководство по обслуживанию

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Model: CTM511/5S, CTM631/5S, CTM711/5S - Stereo Televisions
Symptom: All sets have in common a 12 Volt Zener Diode ((ZD 402 - 12V/1W) short and
limiting Resistor (0.68
Ω
and/or 6.2
Ω
) open, or vertical collapse (TDA 3653B)
and/or Horizontal output transistor (2SD1555 or 2SD1547) short.
Confirmation: Check B+ as 112V/(143V respectively CTM 7xx) up by ~ 30 to 40Volts
Check 12 Volt rail and if not there....
Check Zener Diode (ZD 402) for short (near Vertical heatsink)
(CTM511/515) Check R423 open
(CTM631/635, CTM 711/715) Check R435 open (near EHT TRX)
Instruction: Replace all faulty components and the following Capacitors in the Power supply.
CTM CTM CTM
Old Value New Value 511/515 631/635 711/715
47uF/25V 47uF/63V C909 C910 C910
10uF/50V 10uF/100V C910 C908 C908
Also check the B+ rail capacitor and replace it if the powersupply failed as outlined above.
Model Location Original: Replace with:
CTM511 or 515 C915 47uF/160V 47uF/160V
CTM631 or 635 C926 22uF/160V 22uF/160V
CTM711 or 715 C925 100uF/150V 100uF/160V
Special Note:
When a unit is repaired for the symptoms as described above and the Capacitors are not
replaced, because it is not apparent that they are faulty, it will result in a repeated
breakdown within days after completion of the repair.
It is imperative that all Televisions with the above model number, irrespective of the
original complaint, have the outlined power supply Capacitors replaced as a matter of
preventative service
.
Should you require any more information, please fax your enquiry on (03) 646 5554 to the attention
of the Technical Manager.
TEAC AUSTRALIA
TECH MEMO
23.07.94