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 MDD262
Page 9: ...1 8 MEMO ...
Page 15: ...2 11 2 12 MEMO MEMO ...
Page 16: ...2 13 PACKING ACCESSORY VIEW ...
Page 30: ...3 14 2 HA12237F ...
Page 35: ...3 19 MEMO ...
Page 47: ...4 12 8 TRACKING SIGNAL 1 Tro 2 Tr 3 Tr 9 RF WAVEFORM ...
Page 48: ...4 13 10 DISK TYPE JUGEMENT WAVEFORM 1 F 2 FDO 3 SVRRF DVD CD ...
Page 49: ...4 14 MEMO ...
Page 50: ...4 15 4 16 SCHEMATIC DIAGRAMS 1 MPEG SCHEMATIC DIAGRAM ...
Page 51: ...4 17 4 18 2 SERVO SCHEMATIC DIAGRAM ...
Page 52: ...3 INTERFACE SCHEMATIC DIAGRAM 4 19 4 20 ...
Page 53: ...4 21 4 22 DVD P C BOARD TOP VIEW PRINTED CIRCUIT DIAGRAM ...
Page 54: ...4 23 4 24 DVD P C BOARD BOTTOM VIEW ...
Page 55: ...4 25 4 26 MEMO MEMO ...
