1-3
NOTES REGARDING COMPACT DISC PLAYER REPAIRS
1. Preparations
1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components
are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components
can be damaged, and for that reason components should be handled with care.
2) The pick-up is composed of many optical components and other high-precision components. Care must be
taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong
magnetism is present, or where there is excessive dust.
2. Notes for repair
1) Before replacing a component part, first disconnect the power supply lead wire from the unit
2) All equipment, measuring instruments and tools must be grounded.
3) The workbench should be covered with a conductive sheet and grounded.
When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is
because there is the possibility of damage by static electricity.)
4) To prevent AC leakage, the metal part of the soldering iron should be grounded.
5) Workers should be grounded by an armband (1M
Ω
)
6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent
static electricity changes in the clothing to escape from the armband.
7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.
CLEARING MALFUNCTION
You can reset your unit to initial status if malfunction occur(button malfunction, display, etc.).
Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside of
the volume knob for more than 3 seconds.
If you reset your unit, you must reenter all its settings(stations, clock, timer)
NOTE
: 1. To operate the RESET jump wire, pull the volume rotary knob and release it.
2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.
Summary of Contents for MDS902S
Page 9: ...1 8 MEMO ...
Page 17: ...2 15 2 16 MEMO MEMO ...
Page 18: ...2 17 PACKING ACCESSORY SECTION ...
Page 31: ...3 13 INTERNAL BLOCK DIAGRAM OF ICs 1 HA12237F BLOCK DIAGRAM ...
Page 32: ...3 14 2 NJW1190 BLOCK DIAGRAM 3 AF330W20FT 3 1 PIN CONFIGURATION ...
Page 33: ...3 15 3 2 BLOCK DIAGRAM 3 3 PIN DESCRIPTION ...
Page 34: ...3 16 4 AF350W01FT 4 1 PIN CONFIGURATION 4 2 BLOCK DIAGRAM ...
Page 35: ...3 17 4 3 PIN DESCRIPTION ...
Page 36: ...3 18 3 19 WIRING DIAGRAM ...
Page 37: ...3 20 3 21 BLOCK DIAGRAM ...
Page 40: ...3 26 3 27 3 AUDIO MAIN SCHEMATIC DIAGRAM ...
Page 41: ...3 28 3 29 4 DECK SCHEMATIC DIAGRAM ...
Page 42: ...3 30 3 31 5 USB AUX2 HEADPHONE AMP SCHEMATIC DIAGRAM ...
Page 43: ...3 32 3 33 6 I O JACK SCHEMATIC DIAGRAM ...
Page 44: ...3 34 3 35 7 AMP SCHEMATIC DIAGRAM ...
Page 45: ...3 36 3 37 8 WOOFER AMP SCHEMATIC DIAGRAM ...
Page 46: ...3 38 3 39 9 FRONT SCHEMATIC DIAGRAM ...
Page 47: ...3 40 3 41 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP VIEW ...
Page 48: ...3 42 3 43 MAIN P C BOARD BOTTOM VIEW ...
Page 49: ...3 44 3 45 2 SMPS POWER P C BOARD 3 SUB SMPS POWER P C BOARD ...
Page 50: ...3 46 3 47 4 FRONT P C BOARD TOP VIEW ...
Page 51: ...3 48 3 49 FRONT P C BOARD BOTTOM VIEW ...
Page 52: ...3 50 3 51 5 AMP P C BOARD TOP VIEW BOTTOM VIEW ...
Page 53: ...3 52 3 53 6 WOOFER AMP P C BOARD MEMO ...
Page 65: ...4 12 8 TRACKING SIGNAL 1 Tro 2 Tr 3 Tr 9 RF WAVEFORM ...
Page 66: ...4 13 10 DISK TYPE JUGEMENT WAVEFORM 1 F 2 FDO 3 SVRRF DVD CD ...
Page 67: ...4 14 MEMO ...
Page 68: ...4 15 4 16 SCHEMATIC DIAGRAMS 1 MPEG SCHEMATIC DIAGRAM ...
Page 69: ...4 17 4 18 2 SERVO SCHEMATIC DIAGRAM ...
Page 70: ...4 19 4 20 3 USB SCHEMATIC DIAGRAM ...
Page 71: ...4 21 4 22 4 INTERFACE SCHEMATIC DIAGRAM ...
Page 72: ...4 23 4 24 DVD P C BOARD TOP VIEW PRINTED CIRCUIT DIAGRAM ...
