- 1-4 -
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.
Armband
Conductive
Sheet
Resistor
(1 Mohm)
Resistor
(1 Mohm)
Summary of Contents for XBS341 Series
Page 1: ...SERVICE MANUAL MODELS XBS341...
Page 10: ...2 1 SECTION 2 AUDIO PART...
Page 12: ...3 2 VCR ELECTRICAL TROULBESHOOTING...
Page 13: ...3 3...
Page 27: ...SECTION 4 MECHANSIM OF VCR PART...
Page 39: ...4 12...
Page 41: ...4 14...
Page 51: ...4 24...
Page 58: ...5 1 DVD ELECTRICAL TROUBLESHOOTING 1 Test debug flow SECTION 5 DVD PART...
Page 59: ...5 2...
Page 60: ...5 3...
Page 61: ...5 4...
Page 62: ...5 5...
Page 63: ...5 6...
Page 67: ...5 10 2 Tray close waveform 3 Tray open waveform...
Page 69: ...5 12 6 LASER POWER CONTROL RELATED SIGNAL NO DISC CONDITION 7 DISC TYPE JUDGEMENT WAVEFORM...
Page 70: ...5 13...
Page 71: ...5 14 8 FOCUS ON WAVEFORM...
Page 72: ...5 15 9 SPINDLE CONTROL WAVEFORM NO DISC CONDITION...
Page 73: ...5 16 10 TRACKING CONTROL RELATED SIGNAL System checking...
Page 74: ...5 17 11 RF WAVEFORM 12 MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT ASPDIF...
Page 75: ...5 18 13 MT1379 VIDEO OUTPUT WAVEFORM 1 Full colorbar signal CVBS 2 Y...
Page 76: ...5 19 3 C 14 AUDIO OUTPUT FORM AUDIO DAC 1 Audio related Signal...
Page 77: ...5 20 MEMO...
Page 80: ...2 2 2 3 BLOCK DIAGRAM...
Page 81: ...2 4 2 5 AUDIO SHEMATIC DIAGRAMS U COM SCHEMATIC DIAGRAM...
Page 82: ...2 6 2 7 FUNCTION POWER SCHEMATIC DIAGRAM...
Page 83: ...2 8 2 9 MAIN AMP SCHEMATIC DIAGRAM...
Page 84: ...2 10 2 11 WIRING DIAGRAM...
Page 86: ...2 14 2 15 PRINTED CIRCUIT DIAGRAM MAINAMP FRONT P C BOARD SOLDER SIDE...
Page 87: ...2 16 2 17 MAINAMP FRONT P C BOARD COMPONENT SIDE...
Page 88: ...2 18 2 19 FUNCTION POWER P C BOARD SOLDER SIDE...
Page 89: ...2 20 2 21 FUNCTION POWER P C BOARD COMPONENT SIDE...
Page 90: ...3 17 3 18 VCR SHEMATIC DIAGRAMS SYSTEM SCHEMATIC DIAGRAM...
Page 91: ...3 19 3 20 A AUDIO V VIDEO SCHEMATIC DIAGRAM...
Page 93: ...3 23 3 24 HIFI TUNER SCHEMATIC DIAGRAM...
Page 94: ...3 25 3 26 A V JACK SCART SCHEMATIC DIAGRAM...
Page 96: ...3 29 3 30 PRINTED CIRCUIT DIAGRAMS TUNER P C BOARD...
Page 97: ...3 31 3 32 VCR P C BOARD...
Page 98: ...3 33 3 34 VCR P C BOARD...
Page 99: ...5 22 5 21 DVD PART SCHEMATIC DIAGRAMS MPEG SCHEMATIC DIAGRAM...
Page 100: ...5 23 5 24 SERVO SCHEMATIC DIAGRAM...
Page 101: ...5 25 5 26 AUDIO SCHEMATIC DIAGRAM...
Page 102: ...5 27 5 28 INTERFACE SCHEMATIC DIAGRAM...
Page 103: ...5 29 5 30 VOLTAGE SHEET IC TR...
Page 104: ...5 31 5 32 PRINTED CIRCUIT DIAGRAM DVD P C BOARD SOLDER SIDE...
Page 105: ...5 33 5 34 DVD P C BOARD COMPONENT SIDE...
Page 107: ...MEMO MEMO...
Page 109: ...MEMO MEMO...
Page 115: ......
