SAMSUNG MM-L2, MM-L4 free download

File name SAMSUNG MM-L2, MM-L4.pdf

MICRO COMPONENT SYSTEM MM-L2 MM-L4 MM-L2G MM-L4G SERVICE MICRO COMPONENT SYSTME Push Open Manual CONTENTS 1. Alignment and Adjustments On/Standby 2. Exploded Views and Parts List Volume CD Repeat A B Band TUNER CD 3. Electrical Parts List EQ Up Timer Clock TAPE AUX Mute Down Tuning Mode S.Bass 4. Block Diagrams 5. PCB Diagrams 6. Wiring Diagram 7. Schematic Diagrams Push Open On/Standby Repeat A B Volume Band PTY RDS Display CD Sync. REC/ Pause TUNER CD Mute EQ TAPE AUX S.Bass Up Down Tuning Mode Power Sound Push Eject ELECTRONICS © Samsung Electronics Co.,Ltd. SEP. 2001 Printed in Korea Code no. AH68-20183R 1. Alignment and Adjustments (Only MM-L4/L4G) 40 1.85 -0.05V), Samsung Electronics 1-1 Alignment and Adjustments (OPTION) LW 1-2 Samsung Electronics Alignment and Adjustments (Only MM-L4/L4G) 1- 3 Tuner (Only MM-L2/L2G) FM Section 3030 2970 FM IF Adjustment SSG FREQ. Adjustment point (T101) Remark Freq. Setting 10.7MHZ DEV=40.0KHZ LEVEL=60dB FM DETECTOR COIL Maximum output (Figure 1-1) Tune to the lowest SET Oscilloscope TP1 TP2 4P OUTPUT *TP1:PIN 19 OF IC102 TP2:PIN 4 OF IC101 Input IF GENERATOR Figure 1-1 IF CENTER Adjustment FM Frequency Coverage Adjustment SSG.FREQ. 87.5MHZ 108MHZ FREQ.SETTING TUNE TO THE LOWEST TUNE TO THE HIGHEST ADJUST.POINT L101 CHECK REMARK 0.9V 6V Digital DC Voltmeter SET C160 + - Figure 1-2 FM Freq. Range Adjustment Samsung Electronics 1-3 Alignment and Adjustments FM Sensitivity Adjustment SSG.FREQ. 90MHZ 106MHZ FREQ.SETTING 90MHZ 98MHZ ADJUST.POINT L102 C161 REMARK MAX. OUTPUT MAX. OUTPUT MW Tuning Voltage (VT) Check Spec. 522KHZ : 0.9V+/-0.1V 1611KHZ : 7.25V+/-0.5V Adjustment Low(522KHZ) VT Basic , Adjust T105(OSC) FM Stereo Separation Check fc 98.0MHZ fs 1KHZ Main 53% Pilot 10% Level 66dB Spec Normal : 25dB Limit : 20dB RF Adjustment(Figure 1 2 3 Low Frequency(594KHZ), High Frequency(1404KHz),Usable Senc. (S/N 20dB) < 60dB Adjust T104(MW ANT), Gain Output Max. Adjust C162 Gain Output Max. FM Seek Stop Check fc Seek Stop 98MHZ fs 1KHZ Dev 40KHZ Level Spec. 23-30dB 60cm AM ANT Output Level FM ANT. GND SET AM SSG 450KHZ SET Speaker terminal OSCILLOSCOPE VTVM FM SSG VTVM Figure 1-3 FM Stereo Separation AND Seek Stop Check eparation Oscilloscope Figure 1-5 MW RF. Adjustment AM (MW) Section AM (MW) IF Adjustment IF GENERATOR Frequency Adjustment Point T102 Maximum output (Figure 1-4) 450KHZ 999KHZ AM IF COIL Seek Stop Check fc 999KHZ fs 400 HZ Dev 30% Level Spec. 40-70dB AM (LW) Section Tuning Voltage (VT) Check Spec. 144KHZ : 1.0V +/- 0.2V 290KHZ : 6.0V+/-0.5V Adjustment Low (144KHZ) VT Basic , Adjust T106(OSC) 60cm AM ANT T102 RF Adjustment 1 2 Low Frequency (170KHZ), High Frequency(270KHz),Usable Senc. (S/N 20dB) < 68dB Adjust T103 (LW ANT), Gain Output Max. Adjust C183 (LW ANT), Gain Output Max. IF GENERATOR 450KHZ SET OSCILLOSCOPE Figure 1-4 AM IF Adjustment 3 Seek Stop Check fc 212KHZ fs 400KHZ Dev 30% Level Spec. 40-70dB 1-4