User manual FOSTEX ADDA-2 PCB SUPPLEMENT

[. . . ] Grounding or Polarization - The precautions that should be taken so that the grounding or polarization means of an appliance is not defeated. Power Cord Protection - Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance. Cleaning - The appliance should be cleaned only as recommended by the manufacturer. [. . . ] Wall or Ceiling Mounting - The appliance should be mounted to a wall or ceiling only as recommended by the manufacturer. Ventilation - The appliance should be situated so that its location or position does not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings. 16. 17. D-25/D-30 ADDA-2 TABLE OF CONTENTS 1. 10 NOTES * Adjustment procedures, parts list, pattern drawing and circuit diagrams are given in this manual to assist the service technician in maintaining the D-25 / D-30 with ADDA-2 PCB assy. * For your information, the followings are the serial number of D-25 / D-30 with ADDA-2 PCB assy. D-25 USA/CND EUR UK D-30 USA/CND EUR UK : 0200407 and onwards : 0600407 and onwards : 0700191 and onwards : 0920866 and onwards : 0920881 and onwards : 0920901 and onwards 3 D-25/D-30 ADDA-2 1. DA Level Adjustment D-25 / D-30 5030 AUDIO OUT (XLR) CH 1 CH 2 BAL IN (XLR) UNBAL OUT (RCA) CH 1 CH 2 AC VOLTMETER Fig. 1 Adjusting points : R192 (for CH 1) on ADDA-2 PCB R292 (for CH 2) on ADDA-2 PCB 1. Sampling Frequency REF Marker position : 44. 1kHz : -12dB 2. Connect the Model 5030 input (XLR) to the D-25/D-30 audio output CH 1 and CH 2 and an AC volt meter to the Model 5030 (RCA) as shown in Fig. Playback the 1kHz, 0dB section (PROG NO. Adjust R192 (CH 1) and R292 (CH 2) on the ADDA-2 PCB so that the AC volt meter reading is +2dBV. By this adjustment, a 1kHz, +16dBm sine wave should appear at the D-25/D-30 audio output. 4 D-25/D-30 ADDA-2 1-2. AD Level Adjustment CH 1 UNBAL IN CH 2 OSC CH 1 5030 UNBAL OUT BAL IN CH 2 AC VOLTMETER BAL OUT CH 2 CH 1 CH 1 AUDIO IN (XLR) CH 2 AUDIO OUT (XLR) D-25 / D-30 Fig. 2 Adjusting points : R191 (for CH 1) on ADDA-2 PCB R291 (for CH 2) on ADDA-2 PCB 1. REF Marker position Sampling Frequency A1, A2 INPUT MONITOR Key : -12dB : 44. 1kHz : ON position 2. Connect the sine wave oscillator, Model 5030, and AC volt meter with D-25/D-30 as shown in Fig. Output a 1kHz, +4dBm sine wave signal from the sine wave oscillator. [. . . ] R001 R002-005 R006-013 R021 R022 R023 Part No. 8230112101 8230500103 8230500104 8230500562 8230500112 8230500100 R152, 252 8230500472 ST, CARBON, 1/10W, 4. 7K, 5% R153, 253 8230500182 ST, CARBON, 1/10W, 1. 8K, 5% R154, 254 8230500103 ST, CARBON, 1/10W, 10K, 5% R155, 255 8230500101 ST, CARBON, 1/10W, 100, 5% R156, 256 8230500103 ST, CARBON, 1/10W, 10K, 5% R157, 257 8230500183 ST, CARBON, 1/10W, 18K, 5% R158, 258 8230500332 ST, CARBON, 1/10W, 3. 3K, 5% R159, 259 8230500392 ST, CARBON, 1/10W, 3. 9K, 5% 6 D-25/D-30 ADDA-2 Ref. R160, 260 R161, 261 R162, 262 R163, 263 R181, 281 R182, 282 R183, 283 R184, 284 R185, 285 R186, 286 R191, 291 R192, 292 Part No. [. . . ]