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Composition of the parts: (Refer to the block diagram, Fig. 1)
POWER (power supply), JACK, MAIN, panel, motor (turntable), CD unit, LCD unit
Outline of the parts: (Refer to the block diagram, Fig. 1)
1. POWER (power supply) (Fig. 9)
SW power supply with multiple correspondence from 100 to 240 V
AC inlet and fuse differ according to the destination (the constants are used in common).
Output of +20 V, +15 V, +7 V, +5 V, +3.3 V, -15 V
Power supply for +20 V motor
Power supply for +15 V analog operation amplifier
Power supply for -15 V analog operation amplifier, power supply for LCD
Power supply for +7 V CD unit motor
+5 V system power supply
+3.3 V system power supply
+1.8 V system power supply (generated at the MAIN circuit board)
2. JACK
Composed of I/O JACK, SW, turntable drive circuit, analog circuit, etc.
Headphone JACK: 6.3 mm specification, stereo, 20 mW (at the time of a 32 ohm load)
Headphone volume: Variable
LINE OUT: RCA pin type, L/R ch
Digital output: COAXIAL
Control: Used with connection of stereo MINI, DZ, or MZ
Mode switching switch: Turntable mode (scratching is possible, turntable speed)
Brake: The brake at the time of turntable mode becomes variable.
3. MAIN
System control is performed.
Composed of the three microcomputers UI, SC, and MD.
UI microcomputer: Control of the main panel
SC microcomputer: Mainly control of sound processing, LCD display, audio output
MD microcomputer: Mainly control of data reading, CD and SD data reading
4. Panel
Composed of switches, LEDs, adjustment controls, etc.
Panel switches, LED control, volume control
A/D method by resistance division, divided into 10 steps
5. Motor
This is the turntable motor circuit board.
It is composed of the motor common with SL1200.
6. CD unit
CD drive unit for CAR, with antivibration construction, max. 4x speed.
The MAIN circuit board uses an ATAPI connection.
7. LCD unit
This is a display LCD unit with 128 x 128 full dots and blue mode.
Explanation of the main signals:
UI microcomputer
• Panel control
SW10 to 40: SW input
CD/SD: CD/SD switching input
REV: Reverse switch input
PCON: Pitch control switch input
CP0, 1, CPLED, CPDATA, CPCLK: LED control
STROBE: Stroboscope output
CD mode (scratching is not possible, the turntable does not turn)
SW input for SD open detection, CD/turntable switching, and switches other than
EJECT
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