Jvc XMP 55 Service Manual

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1-24-15 XM-P55 XM-PJ1 XM-P55 XM-PJ1 CAUTION CAUTION Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. Safety Precaution Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. Packing Parts List Accessories Parts List

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XM-P55 XM-PJ1 2-1 37 38 PEAK RF 39 RFAGC 40 AGCI 41 COMPO 42 COMPP 43 ADDC 44 OPO 45 OPN 46 RFO 47 MORFI 48 1 2 MORFO 24 23Vcc 3TADJ 22 EQADJ 21 VREF 20 F0CNT 19 XSTBY 18 XLAT 17 SCLK 16 SWDT 15 TEMP R 14 TEMP I 13 GND I J 3 VC 4A 5B 6C 7D 8E 9F 10 PD 11 APC 12 APCREF 36 35 BOTM ABCD 34FE 33AUX 32ADFG 31ADAGC 30ADIN 29ADFM 28SE 27CSLED 26TE 25WBLADJ Peak, Bottom DetectorAGC, EQ USER Comp USER OP Amp RF Amp 3T Detector ABCD Amp I-V Amp APCTEMP Amp MUX FE AmpADIP Amp TE/SE Amp CPU Command I/F CXA2523AR(IC310):MD RF & Servo 1.Block Diagram 2.Pin Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20I-V converted RF signal I input. I-V converted RF signal J input. Vcc/2 voltage output. A current input for main beam servo signal. B current input for main beam servo signal. C current input for main beam servo signal. D current input for main beam servo signal. E current input for side beam servo signal. F current input for side beam servo signal. Reflection light quantity monitor signal input. Laser APC output. Reference voltage input for the laser power intensity setting. Connect to GND. Connects the temperature sensor. Connects the temperature sensor. outputs the reference voltage. Data input for microcomputer serial interface. Shift clock input for microcomputer serial interface. Latch signal input for microcomputer serial interface.Latched when low. Standby setting pin. Normal operation when high Standby when low. Internal current source setting pin. I J VC A B C D E F PD APC APCREF GND TEMPI TEMP R SWDT SCLK XLAT XSTBY F0CNTI I O I I I I I I I O I - I I I I I I I Pin No. Symbol I/OFunction Description of Major ICs

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XM-P55 XM-PJ1 2-24 Command data1 data2 data3 data4 data5 data6 data7 Ope.mode State PLY P REC P EEP R EEP S Self diagnosis Function of MD Power Supply ------------- Use to a battery charger by more than 1.3volt Establishment ------------ Set up the horizontal 1. The method of changing to the self-diagnosis mode turns off the power supply of the main body first. 2. The power supply of the main body is turned on while pushing "PLAYMODE +DISPLAY+A.B.BASS "of the remote control unit at the same time. 3. It changes into the self-diagnosis mode, and the self-diagnosis starts. Test 's Command for the self-diagnosis mode =00: Wait to Test command =DD: Going to Resume's EEPROM initialize =DE: Going to servo's EEPROM initialize =E2: Turn on the leaser of PLAY =D3: Turn up the laser =D4: Turn down the laser =D1: Turn off the laser =D5: Rewind to the FEED =D6: Adjust to the PRE DISC =D7: Adjust to the MO DISC =92: Break out the trouble The following are displayed and it stops at the NG generation. The KEY input afterwards is disregarded. Disc mark RandomRepeat FAV DISPLAY button A.C.BASS (Active Clear Bass) button Play Mode butto n [Indicators on the display of the remote control] VOL JOG MODE A.C.BASS BASS MONOBattery