Sharp MS722 Service Manual - Page 13

MD-MS722/C/W/MS721W Test disc ADJUSTMENT MD adjustment needs two types of disc, namely recording disc (low reflection disc) and playback-only disc (high reflection disc). Type Test disc Parts No. 1 High reflection disc MMD-110 (TEAC Test MD) 2 Lowreflection disc MMD-212 (TEAC Test MD) 88GMMD-110 88GMMD-212 3 Low reflection disc Recording minidisc UDSKM0001AFZZ Note: Use the low reflection disc on which music has been recorded. Entering the TEST mode 1. Setting at port (in standby state, disc-free state or power nonconnected state) (1) Set the port as follows. TEST1 : "Low" TEST0 : "High" (2) Press the PLAY button in the standby state (it is allowed to insert the disc or to connect the power supply). (3) Test Mode STOP [ _ T E S T _ ] 2. Setting by special button operation (in standby state) (1) Holding down the DISP button and ENTER button, press the PLAY button. (2) Normal mode setting initialization (BASS setting, VOL setting, etc.) (3) Indication of microcomputer version for one second [ 7 0 2 A f X ] (Only Serial No. 811XXXXX) [ 9 0 8 A f X ] (From Serial No. 812XXXXX) Destination Microcomputer version EEPROM version (4) Whole LCD lighting for 2 seconds (5) Test Mode STOP [ _ T E S T _ ] *When the PLAY button is pressed during indication (3) and (4), the process proceeds to (5). Leaving the TEST mode (1) Press the STOP button in the TEST mode stop state or version indicating state or whole LCD lighting state. (2) EEPROM rewrite-enable area updating, adjustment error setting (so as to adjust all the items when the power supply is turned on in the normal mode) (3) Change to standby state Shipping setting method Holding down simultaneously the VOLUME-DOWN key and PLAY key of the set unit without disc, supply the power from the DC IN plug. After the indication "INIT" -> "BYE OK" disappears, release the power supply of DC IN. Test Mode 1. AUTO 1 Mode 2. AUTO 2 Mode 3. MANUAL 1 Mode 4. MANUAL 2 Mode 5. RESULT 1 Mode 6. RESULT 2 Mode 7. TEST-PLAY Mode • Perform preliminary automatic adjustment. • If the combination of mechanism and pickup PWB has been changed, be sure to start from AUTO1. • Perform ATT (attenuator) automatic adjustment. • Perform continuous playback (error rate display, jump test) • Temperature is displayed. (Updating in real time) • Seeing the displayed adjustment value, perform preliminary manual adjustment. (Error rate indication, jump test) • Temperature is displayed. (Updating in real time) • Seeing the displayed adjustment value perform manfully the preliminary adjustment. (Error rate indication, jump test) • Continuous playback is performed (error rate display, jump test). • The value adjusted in AUTO1 or MANUAL1 is indicated. • (Execution in servo "OFF" state"). • The value adjusted in AUTO 2 or MANUAL 2 is indicated. • Adjustment value is changed manually. (error rate display, jump test). • Continuous playback from the specified address is performed. • 1 line, 10 lines or 400 lines manual jump is performed. • C1 error rate display (pit section), ADIP error rate display (groove section) • The temperature correction is performed only when servo start is performed, but the posture correction is not performed during continuous playback. 8. TEST-REC Mode • Continuous record from the specified address is performed. • Change of record laser output(servo gain is also changed according to laser output). • The temperature correction is performed only when servo start is performed, but the posture correction is not performed during continuous recording. 9. NORMAL Mode • The mode is changed from the TEST mode to the normal mode without adjustment. • In the normal mode the internal operation mode, memory capacity, etc. areindicated. • In the normal mode both temperature correction and posture correction are perfomed. 10. DIGITAL INPUT Mode • Digital input information is displayed. 11. ERROR INFORMATION • Error information is displayed. Mode • Error information is initialized 12. EE-PROM Mode • Factors of digital servo are changed manually. (Each servo is turned on individually.) • Cut-off frequency of BASS1, BASS2 and BASS3 is selected manually. • Temperature detection terminal voltage is measured, and the reference value is set. • Defaults are selected and set. • Setting of EEPROM protect area is updated. (In case of protect releasing) 13. INNER Mode • Determine the position where the INNER switch is turned on. (only high reflection disc). • The temperature correction is performed only when servo start is performed, but the posture correction is not performed. - 13 -