Tandberg TPA 3003 Service Manual
This is the 8 pages manual for Tandberg TPA 3003 Service Manual.
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Extracted text from Tandberg TPA 3003 Service Manual (Ocr-read)
Page 1
I [il[i I[;l fi J o*,.'-o 'd" JTTlTrl *, ro' Fr 1n,,, grc l= [t lElv rrIETgr c;"' Ftij lri,r *|t|fjff ii'r ; ,. I t ' ' :. l,]H_*f fit " hlf P ; HFtfT F , ' '."': jt :Y-,'j'"VEl l. . .l ororlQf ? o'*'lI ol03 IlllI.,,, .- lrvt ,++-++Jir 3K tl;l _* El;l;Elgi T cles ri ' ir' ALL BOARDS ARE SEEN FROM THE SOLDER SIDE Po wer amplifier b oard, left channel lfi:: _** lT#HlfiA | ;; , =E ,uA-* I J Tr lrr H+ **, f HH t+'F tl:ru EIE1fiar sfr ;r [_ll r* Il:'; -'-l'ttEEHtr ,* ? r iur -t+ .r, A.*,+ H6 tff Hff -^.rt [ ,h f ri- r lsf J'r I u try r ='Y? F*flEFF=i Ftri:i 'r:31 li:!, :T fI.'M It5 61l I ET;TrrF?: _: HHAHHFT;, H =e i,,fitf rle :rl,llL Jllr;"r J 't'- Power arnplifier board, right channel
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o.r o r----lF< */ n/ // Power supply board I t 6"'6\ ,.lGtH{'+il m*Fd, E q'&:'HH'rc c30{.-1tr* c30l*-f[* .-l----l- R 21 3\zx .!----t{ ct rtR B6lotE rcls elg ail i ? ' st o ._ s.d >l r-he - *l*( il rn llP 6t 3l - ul .llR ol c ' L--:rt + B .1_____J{R 20!t\21 0 + - tt> .TE I efQ<1 \c agl ..-3i?rlvl? , f-i li'lll.lI l.l rll l.l 5 Output power amplifier board Adjustments Ouiescent current Test condition: Approx. 10 min. warming up time from cold con- dition without signal applied. Connect a VT\M across R203/R204 for left/ right channels respectively, i.e. between the top terminals of R203 and R205/R204 and R206, see figure. Adjust Rl17/R118 (t) for 40 mV reading on the VTVM. Peak clipping Connect an oscilloscope to left/right speaker output across 8 ohms load. Apply a I kHz signal and drive the amplifier to just below clipping point. Adjust R127/R128 (r ) r" that the Peak Clipping indicators on the front lights up. Then fine adjust the potentiometers down until the lights just goes off. rd> FRONT l_J t_J i t_i L_l Li r_i l-l r-l l-l l-l Measuring p oint, quie s cent current.