InterM ACR60 & 120 free download

File name InterM-ACR60_120 cd+rec.pdf

SERVICE MANUAL C O M P A C T D I S C RECEIVER ACR-60/120 http://www.inter-m.com MADE IN KOREA NO: 9007978900 ELECTRICAL ADJUSTMENT PROCEDURE AMP SECTION 1. OFF SET VOLTAGE A. Setting Set the master volume controls minimum. B. Connection C. Adjustment Control OFFSET until voltmeter is the "0" position. 2. IDLE CURRENT A. Setting Set the master volume controls minimum. B. Connection CONTENTS Electrical Adjustment Procedure Micom Data (CD) Specifications Electrical Parts List Top and Bottom View of P.C. Board Wiring Diagram Block Diagram Schematic Diagram Exploded View of Cabinet & Chassis / Mechanical Parts List Ass'y Drawing 1, 2, 3 4, 5, 6, 7 8 9, 10, 11, 12 13, 14, 15 16 17 18, 19, 20, 21, 22, 23 24, 25 26, 27 C. Adjustment Adjust IDLE so that the current through the R56, R57, R58, R59 become 10 milliampere. When that voltage across the IDLE2 TO IDLE3 becomes 10 millivolt, the current becomes 10 milliampere. 1 AM SECTION 1. IF ALIGNMENT A. Set up the test equipment as Fig. 1-1 and set the genescope output level to 110dB (300mV). B. Adjust T603 so that the figure developed or the oscilloscope become laterally symmetrical with the axis of symmetry at 450kHz and it has a maximum amplitude as well. FM SECTION 1. IF ALIGNMENT A. Set up the test equipment as Fig. 2-1. B. Adjust the cross T604 and T605 so that the S curve developed on the oscilloscope become point symmetry to the centry frequency poine of 10.7MHz with a maximum amplitude. C. If the genescope is not available, set the unit detuned and adjust the cross of T604, T605 so that noise output is maximized. Fig. 1-1 2. RF TUNING ALIGNMENT A. Set up the test equipment as Fig. 1-2. B. Set AM SG to 30% modulation at 400Hz and 30-40dB output. C. Set the up and down switch of the frequency display to 603 (or 600) kHz. Adjust AM SG to 603 (or 600) kHz, adjust T602 (RF) to maximize audio frequency output level. D. Set the up and down switch of the frequency display to 1404 (or 1400) kHz, adjust AM SG to 1404 (or 1400) kHz, and adjust AM trimmer capacitor C605 to maximize audio frequency output level. E. Repeat steps and so that output is maximized at the given frequencies. Fig. 1-2 2 3 MICOM DATA (CD) KS88-SERIES MICROCONTROLLERS Samsung's KS88 series of 8-bit single-chip CMOS microcontrollers offers a fast and efficient CPU, a wide range of integrated peripherals, and various mask-programmable ROM sizes. Among the major CPU features are: ­ Efficient register-oriented architecture ­ Selectable CPU clock sources ­ Idle and Stop power-down mode release by interrupt ­ Built-in basic timer with watchdog function A sophisticated interrupt structure recognizes up to eight interrupt levels. Each level can have one or more interrupt sources and vectors. Fast interrupt processing (within a minimum of four CPU clocks) can be assigned to specific interrupt levels. FEATURES Memory · ROM: 32-Kbyte (KS88C2432/P2432) · ROM: 16-Kbyte (KS88C2416/P2416) · RAM: 1056-Byte (KS88C2432/P2432, KS88C2424/P2424)