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Alto PBM 8.250 Service Manual
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Alto PBM 8.250 Service Manual

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Summary of Contents for Alto PBM 8.250

  • Page 2 ! " %%%%%%%%%%%%%%%%%%%%%% %%%%%% %& " %%%%%%%%%%%%%%%%%%%%%%% %%% %%%( & ) * %%%%%%%%%%%%%%%%%%%%%%%%%%%%% ( " , %%%%% %%%%%%%% %%% % %%%%%%% % - $%% %%%%%% %%%%% %%% %% %%%%%%% %%% / %%%% %%%%%%%%% %%%%%%%%%% %% % & %%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%% %& $ %%%%%%%%%%%%%%%% (2...
  • Page 3 ! " %& , - . #3 4...
  • Page 4 " & 4 & 9 *#: & 7 & % & ( #*< 7< * 78 & 4 = 8 & 7 #*< +> ?$@ & 9 4 = 8 & & & & 8 +# = 8 & 4 &...
  • Page 5 &...
  • Page 6 Titel C1_11 C1_13 C2_11 C2_13 C3_11 C 3_13 C4_13 C5_11 C5_13 C6_11 C6_13 C7_21 C7_23 100N C4_11 C8_23 ALTO P MB8 PB M8_CTRL_BOARD 100N 100N 100N 100N 100N 100N 100N 100N 100N 100N 100N 100N 100N 100N 100N S ize...
  • Page 7 6K 8 6K 8 2K 7 8 B 73 NJM 4580M 8 B 9 ; B 77=B @ 8 B 9 ; B 77= B Titel ALTO PMB8 PBM8_CTRL_BOARD U15B U16B NJM 4580M NJM 4580M Size Model No: Rev ision PBM8.250 PBM8.500...
  • Page 8 $@A. B . 9 YELLO W LED ,@A. 100N 10dB NJM 4580M RED LED 680R U11A $@A. NJM 4580M Titel 100N ALTO PMB8 PBM8_CTRL_BOARD Size Model No: Rev ision PBM8.250 PBM8.500 Date: 17-Jan-200 5 Sheet File: MONITOR9.Sch Draw n By : KATY...
  • Page 9 . ++@ 1N4004 OPERATING 3mm G REEN LED 220uF /35V R111 3K 9 1/2W 1N4004 C < % $@A. Titel ALTO PMB8 PBM8_CTRL_BOARD Size Model No: Rev ision PBM8.250 PBM8.500 Date: 17-Jan-2005 Sheet File: DSP_POW ER.Sch Draw n By: KATY...
  • Page 10 R41 10K CONNECTORS R40 5K6 90STEREO JACK 100R 1/4W 90STEREO JACK 10uF/25V R2 27K RTN_R R_BUS NJM4580M FOOT SW. STEREO 10uF/25V 10uF25V FOOT_SW RETURN 220R RTN_L HEADPHONES 90STEREO JACK SWITCH 2C_3P L_BUS 100R 1/4W R4 10K 90STEREO JACK AMP_L L_BUS NJM4580M NJM4580M HEADER3...
  • Page 11 J1_2 J5_2 90STEREO JACK 90STEREO JACK CH1 LINE CH5 LINE J1_1 J5_1 XLR FEMALE XLR FEMALE C1_1 C5_1 47uF/63V 47uF/63V CH1 INPUT CH5 INPUT R1_2 R5_2 INPUT/WIRELE SS C1_2 C5_2 C5_6 R1_7 R5_7 R1_6 R5_6 R1_4 C1_6 R5_4 C1_3 C5_3 S1_1A R1_9 R5_9...
  • Page 12 CN-PCB6.3 R1_39 MPSA42 J1_10 R1_40 PTC 65R 5mm RED LE D R1_34 100R GND1 Vic- F1_2 CN-PCB6.3 -73V_A (FOR PBM8.250=4A) Titel ALTO PBM8-CH1 DRIVE Size Model No: Revision PBM8.250 VER040406 17-Jan-2005 Date: Sheet File: PBM8AMP.250-CH1 .Sch Draw n By: C.C.LIN...
  • Page 13 NJM4580L Vic2- J2_7 CN-PCB6.3 J2_8 D2_2 1N4004 F2_1 +73V_B R2_36 R2_35 Vic2+ D2_1 120K 100K CN-PCB6.3 D2_5 KUB8J(8A) C2_1 (FOR PBM 8.250=4A) ZD15V1.3W J2_3 J2_9 47uF/100V GND1 OUTPUT_2 OUTPUT_2 Q2_5 GND1 R2_38 MPSA92 D2_4 Q2_6 CN-PCB6.3 R2_39 MPSA42 J2_10 R2_40...
  • Page 14 OUTPUT_1 Q1_5 G ND1 R1_38 D1_4 MPSA92 Q1_6 CN-PCB6.3 R1_39 MPSA42 J1_10 R1_40 PTC 65R 5mm RED LE D R1_34 100R GND1 Vic- F1_2 CN-PCB6.3 -73V_A (FOR P BM8.250=4A) Titel ALTO PBM8-CH1 DRIVE Size Model No: Revision PBM8.500 VER040406 17-Jan-2005...
  • Page 15 Q2_6 CN-PCB6.3 R2_39 MPSA42 J2_10 R2_40 PTC 65R 5mm RE D LED R2_34 100R GND1 Vic2- F2_2 CN-PCB6.3 -73V_B (FOR PBM8.250=4A) Titel ALTO PBM8-CH1 DRIVE Size Model No: Revision PBM8.500 VER040406 Date: 17-Jan-2005 Sheet File: PBM8AMP.500-CH2.Sch Drawn By : C.C.LIN...
  • Page 16 P O W ER SUP P LY CO NNECTOR PGND +17V VCC1 1N4004 OPERATING 3mm G REEN LED 220uF /35V R111 3K 9 1/2W 1N4004 PGND Title -17V Size Number Revision Date: 17-Jan-2005 Sheet of File: D:\JHB\AUDIO\MIXER\ALTO\POWER MIXER\pbm8\SCH&PCB\PBM8 Drawn By: 1101\PBM8.ddb...
  • Page 20 8 ( (...
  • Page 21 8 ( (...

  • Page 22: Test Procedure

    6. TEST PROCEDURE PCB test procedure. Assemble the unit according to the sample, turn the power switch on the panel to ON, when there is no signal between CH1 (J1-11) and CH2(J2-11), these three LED indictors (D2, D1-16, D2-16) light up. Then D1-4 and D2-4 are lunar, use the multimeter to check the voltages on R1-11, R2-11(+15V),R2-12, R1-12(-15V).
  • Page 23 @D * E# D & /D * #*< 73 7< * 78 = 9 % E! -D 7 E+> @$5D) 7< * 78 73 ) $@ - E, $/ > % I #*< 73 = 9 ( ) E, $/ >...
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  • Page 25 7< * 78 73 ) E, $/ > % I #*< 73 = 9 ( ) E, $/ > % I > 9 #% > 7< 9 73 ) E, $/ > % I #3 4 73 ) E, $/ >...
  • Page 26 @ D 6 E #*< @/D 6 E 7< 7 + 2 5 + 2 0 + 1 5 + 1 0 -1 0 -1 5 -2 0 -2 5 -3 0 1 0 0 2 0 0 5 0 0 1 0k 2 0k...
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  • Page 28 > % = *( *9 8 #*< , #*< @ A6 > % @ J = *( *9 8 #*< , 7< 7 @ A6 > % @ J & = *( *9 8 8 *%C 9 /-A6 > % @ J @AD <...
  • Page 29 @ D + #*< *4 9 8 E= K 8 D -100 -110 -120 l12.at2 @?D & #*< = 9 . 9 = 7< * 78 = 9 . 9 = *< #4 ) #*< > #< 7 #*< = 9 . 9 = 7<...
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  • Page 37 " 8 @$@ 8 $@ 8 # @ A/ @ -6 è 8 @$ 8 $ 8 # @ / @ -6 // è 8 @$- 8 $- 8 # @ / @ -6 5 L è 8 @$/ 8 8 $/@ 8 $/ 8 $/@ 8 @$-@ 8 @$- 8 $-@ 8 $- 8 # @ /- @ -6 - AL è...
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This manual is also suitable for:

Pbm 8.500Pbm8.250