Studer-A80-tape-loc 维修电路原理图.pdf
RadioFans.CN 收音机爱 好者资料库RadioFans.CN 收音机爱 好者资料库Korrigenda Notieren Sie bitte die untenstehenden Korrekturen an den angegebenen Stellen im Buch. P. 6/11 Baugruppe ndert auf 1.328.044.82: * D1.D4, D7, D8 mit 15mm Abstand zur Platine montiert D6 (6V8) wird neu 6V3 * D8 (5V1) wird neu 4V3 * D18 neu, 1N4448, in Serie zur Basis von Q3, Kathode zur Basis. Leiterbahn Basis Q3-Kathode D8 trennen. * Q1 (BD596) wird neu BD900A * R1 (10k) wird neu 4k7 * R3 (68) wird neu 120 * R8 (1k5) wird neu 470 * Q5: Fehler im Schema, Emitter und Kollektor sind vertauscht; Q5 ist ein PNP-Typ. C7 neu, 10/10V SAL, parallel zu R2, + weist auf Anschluss J3 R17 neu, 68, in Serie mit D6. (* nderungen bereits gltig fr 1.328.044.81) P. 6/15 Baugruppe ndert auf 1.328.036.81: C17 neu, 150p, zwischen Pin10 und Pin8 von IC10 Date printed: 12.05.06 Corrections Please note the following corrections at the indicated places in the manual. P. 6/11 Assembly is modified to 1.328.044.82: * D1.D4, D7, D8 mounted with 15mm distance from PCB D6 (6V8) changed to 6V3 * D8 (5V1) changed to 4V3 * D18 new, 1N4448, in series to the base of Q3, cathode towards base. Cut the track from base Q3 to cathode D8. * Q1 (BD596) changed to BD900A * R1 (10k) changed to 4k7 * R3 (68) changed to 120 * R8 (1k5) changed to 470 * Q5: Error in the diagram, emitter and collector are swapped; Q5 is a PNP type. C7 new, 10/10V SAL, in parallel with R2, + towards connector J3 R17 new, 68, in series with D6. (* Modifications valid for 1.328.044.81 as well) P. 6/15 Assembly is modified to 1.328.036.81: C17 new, 150p, between pin10 and pin8 of IC10 PROFESSIONAL AUDIO EQUIPMENT Telephone: +41 (0) 44 870 75 11 Althardstrasse 30, CH-8105 Regensdorf, Switzerland Telefax: +41 (0) 44 840 47 37 A80 Autolocator - Y-IHALT.doc Page 1 Professional Audio GmbH A80 Autolocator Alignment instructions for Stabilizer 1.328.044.82: ? Connect nominal load to INTSUP, pin 10 - 14 of J3 (e.g. Autolocator) (ca. 2.5 A / DC). ? Adjust R4 for +6V ( 0.02V) EXTSUP on pin 15 / 16 of plug J3. ? Interrupt mains supply voltage t = 0 ? Monitor the internal supply voltage drop of INTSUP of 5.2V (nominal value) on a storage scope. ? Adjust the pot. meter R13 that way, that the delay of the signal Y-IHALT changes from the high level into low level in the time window which is given by the values of +5.05V and +4.75V of the supply voltage INTSUP. (see drawing below). The signal Y-IHALT is used to enable the Microprocessor when the supply voltage is fully present and to stop the MPU in case of power failures.(see diagram below). Make sure that the Stabilizer board 1.328.044.xx is modified to Index .82.
