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MICRO COMPONENT SYSTEM MM-B7/ ZB7 SERVICE MICRO COMPONENT SYSTEM TUNER Manual CONTENTS 1. Alignment and Adjustments 2. Exploded Views and Parts List 3. Electrical Parts List 4. Block Diagrams Open/Close Down Tuning Mode Up Demo Standby/On Band CD 5. PCB Diagrams 6. Wiring Diagram 7. Schematic Diagrams TAPE Volume Phones AUX Rec/Pause REV.Mode Sound Mode Push Eject Full Auto Remote Control Operation ELECTRONICS © Samsung Electronics Co.,Ltd. MAY. 2002 Printed in Korea Code no. AH68-01107R 1. Alignment and Adjustments 1. Tuner FM THD Adjustment SSG FREQ. Adjustment point (FM DET) Output 98 MHz FM DETECTOR COIL 60 dB Output GND FM S.S.G FM Antenna SET Terminal Input Speaker Terminal output Oscilloscope Input Distortion Meter Minumum Distortion (0.4% below) (Figure 1-1) Figure1-1 IF CENTER and THD Adjustment FM Search Level Adjustment SSG FREQ. Adjustment point (SVR1) Output 98 MHz BEACON SENSITIVITY SEMI-VR(20K) 28 dB(±2dB) 20 k 28 dB FM Antenna SET FM S.S.G GND FM IN * Adjustment Location of Tuner PCB AM(MW) OSC Adjustment 522~1611 KHz MO 1~7.0±0.5V AM(MW) RF Adjustment 594 KHz MA Maximum Output(Fig1-4) Adjust SVR1 so that "TUNED" of FLT is lighted (Figure 1-2) AM(MW) RF Adjustment 150 KHz LA Maximum Output(Fig1-4) ITEAM Received FREQ. Adjustment point LW OSC Adjustment 146~290 KHz LO 2~7.0±0.5V *Adjust FM S.S.G level to 28dB Figure1-2 FM Auto Search Level Adjustment Output AM(MW) I.F Adjustment SSG FREQ. Frequency Adjustment point 450 kHz 522 kHz AM IF OUTPUT AM SSG 450KHZ INPUT 60cm AM IF AM ANT IN Speaker Terminal Maximum output (Figure 1-3) VTVM OUTPUT Oscilloscope Figure1-3 AM I.F Adjustment Fig 1-4 OSC Voltage Samsung Electronics 1-1 Alignment and Adjustments 2. Cassette Deck 2-1. To Adjust Tape Speed Notes 1) Measuring tape: i) MTT-111 (or equivalent) (Tapes recorded with 3kHz) ii) MTT-5512 (or equivalent) 2) Connect the SPK OUT of the MAIN PCB to the frequency counter as in figure 1-5. MAIN PCB Frequency Counter 2-2. To Adjust PlayBack Level/REC Notes 1) Before the actual adjustment, clean the play/recording head. 2) Measuring tape : i) MTT-114N(or equivalent 10kHz AZIMUTH control) ii) MTT-5512 3) The cassette deck is connections as shown in figure 1-7. SPK OUT output Figure 1-5 Step Item Pre-Setup Condition SPK OUT (connected to the frequency counter) Pre-Setup 1) Deck :MTT-111 2) Press PLAY SW button To Adjust Standard Remark 1 NOR SPEED Control CVR1 3KHz ±1% range 1. Adjust Deck Play Level Step Item Pre-Setup Condition SPK OUT (VTVM is connected to the scope) Pre-Setup After putting MTT 114N into Deck - Press FWD PLAY button. To Adjust - T the control urn screw to as shown in Figure 1-6. Standard Remark 1 Recording /Play head MAIN PCB SPK OUT VTVM AZIMUTH Max output and same phase (both channels) Oscilloscope After adjustment secure it with REGION LOCK. (GND) In Out 2. Adjust Deck REC BIAS Step Item Pre-Setup Condition Pre-Setup After putting MTT - AZIMUTH control screw (