Sony D8MM-01 Training Manual Download

Page: 1 / 44

Training Manual

Circuit Description and Troubleshooting

Course: D8MM-01

Digital
Camcorder

Summary of Contents for D8MM-01

Page 1: ...Training Manual Circuit Description and Troubleshooting Course D8MM 01 Digital Camcorder S ...

Page 2: ... Layout 11 Tape Speed 12 Sub Track Information 13 Tape Wrap Angle 14 Video Signal Block 15 Table of Contents D8 Record 15 D8 Playback 15 Analog 8mm Playback 15 D8 Record Playback 17 D8 Record 17 D8 Playback 23 Analog 8mm Playback 27 Audio Signal Block 29 D8 Record 29 D8 Playback 29 Analog 8mm Playback 29 Servo Block 31 Analog Mode 31 D8 Mode 31 Mech Initialization 33 Determining Recording Type 33 ...

Page 3: ...he new D8 circuitry will not be troubleshot to component level That is because the main board VC 213 contains components that use BGA technology BGA stands for Ball Grid Array This means that the leads for these components are actually balls that are located underneath the IC These ICs cannot be removed or installed using conventional soldering technology The equipment needed is very expensive so ...

Page 4: ...2 NOTES ...

Page 5: ...Hz The rest of the area inside the Y spectrum is for the side bands produced by the frequency modulation of the video Since greater picture detail is located in the higher frequencies of the Y signal the side bands contain the picture detail This means that if we can extend the side bands area we can produce more detail This is more evident when comparing the amount of side band informa tion in th...

Page 6: ...nk equipped VHS machine This is an optional accessory and is only necessary if you want to use the Laserlink function This accessory contains a composite video output that is con nected to your video display s input It also contains separate left and right audio outputs that are connected to the component that will be pro ducing your sound In order to use the system you simply point the camera in ...

Page 7: ...anical switch to move the IR cut filter in and out When the NightShot switch is turned ON it turns ON the Laserlink LEDs located in front of the camcorder as well as physically moving the IR cut filter The light emitted by these LEDs is projected in front of the camcorder and acts like a spotlight The LEDs allow images to be seen in the dark up to three meters away Optional accessories are availab...

Page 8: ...municate with any other device without a need for a hub or a PC to be connected The system uses scalable architecture that will allow older slower devices to communicate with newer faster devices at the slower rate Different combinations of faster and slower devices can be used on the same bus Hardware There is hardware currently available to support speeds of 100 200 and 400 Mb s Megabits per sec...

Page 9: ...s or a new device is added to the system Three steps occur when these events happen IDs Cleared All previous ID information is erased Tree ID The device which is the bus master assigns each node a specific address This is called the Tree ID Process Self ID After IDs have been assigned the system allows time for each device to identify itself to the other nodes in the network Multi Speed Transactio...

Page 10: ...h the IEEE 1394 standard The most notable are Firewire which is an Apple trademark and i LINK which is the Sony trademark Future Developments IEEE1394 seems poised to take its place as the home networking stan dard of the future Its high speed and ease of use are part of the keys that may one day make it the bond between all the components in your home Sony along with other industry leaders is wor...

Page 11: ...is sues related to making digital recordings using standard 8mm tapes are not to be recognized as servicing issues There is one drawback to the use of existing tapes Due to the nature of the Digital 8 format the recording time will be half what it would be in a standard analog 8mm format This means that an E6 120 type cassette would only have a 60 minute recording time instead of the usual 120 min...

Page 12: ...rs located in the lens assembly area that are designed to sense camcorder motion i LINK This is Sony s IEEE1394 interface It allows you to edit dub archive or playback between two digital components with virtually no generation loss These digital components include camcorders com puters DTV set top boxes and many more Data Code Stores the time and date of the recording on the tape The user can acc...

Page 13: ...tions per minute rpm In the D8 system the heads put five swipes or tracks on the tape for each frame of video These swipes are broken down into sub tracks and there are two sub tracks for every track The reason for this is to keep the technology similar to the DV format which uses ten tracks per frame of video The drum speed needs to be increased in order for the system to use five tracks per fram...

Page 14: ...m sec This allows digital 8 to have a track pitch width that is close to that of analog 8 This allows for the use of the same heads for analog playback and digital recording and playback A n a lo g 8 m m D ig ita l 8 T r a c k In fo r m a t io n A n a lo g D ig ita l T r a c k s p e r fr a m e 2 5 T r a c k s p e r s e c o n d 6 0 1 5 0 D r u m r o ta tio n s p e e d 1 8 0 0 rp m 4 5 0 0 rp m T r ...

Page 15: ... an ID block which contains an index ID PP ID still picture search marker Skip ID and absolute track number The data block contains subcode data for time code REC date and REC time Parity information is also contained in this sector The subcode sector contains 3725 bits per sub track In addition to the sectors there are three Gap areas between the four sectors They are called Gap 1 2 and 3 and con...

Page 16: ...e is no longer available in US camcorders and hasn t been for several years Camcorders that use a B mechanism use switching to limit the effective wrap of the tape to 180 degrees D8 uses the B mechanism and also does not need the entire 211 degree wrap D8 uses switching to limit the effective wrap angle to 177 degrees The first 87 degrees of this effective wrap are used to put down the first sub t...

Page 17: ...and Subcode data This data is then streamed to the Head Amplifier It also outputs the compressed video to the IEEE1394 inter face as well as analog signals for the viewfinder and Line Out Head Amp The head amp adds a clock signal and amplifies the data It is then ap plied to the heads and recorded on the tape D8 Playback Head Amp The head amp receives the signal from the heads and amplifies and eq...

Page 18: ...16 ...

Page 19: ...era signal processing block This would be the core IC in an analog 8mm camera This IC outputs Y and C signals to IC601 BBI IC601 BBI The BBI functions as an A D Converter for the Line Input signal It out puts 8 bits of Y and 4 bits each of the color difference signals Cb and Cr It also outputs horizontal and vertical sync signals Compression Block The block diagram below outlines the steps that ne...

Page 20: ...18 ...

Page 21: ...vel of the compression circuit relatively smooth The macro blocks are divided into ten bands Note There are ten sub tracks of video in one frame Shuffling works by building the compression blocks out of macro blocks that are not adja cent to each other While shuffling may randomize the data it does oper ate on a preprogrammed equation This is so the data can be de shuffled before recording The fra...

Page 22: ...20 ...

Page 23: ...s This is the final step in a compression system that took the 162Mbps of data and converted it down to 25Mbps Audio Signal Baseband Processing The audio signal is frequency converted so that its sample rate matches the video signal The signal will not be compressed Audio Signal Interleave The audio data is interleaved into the video data However it is not pro cessed by the video compression circu...

Page 24: ...22 ...

Page 25: ...LL An oscillator is phase compared to the data input from the EQ circuit The phase comparator output is used to control the oscillator so that it is the same frequency and phase as the incoming data The oscillator output is used to clock the playback data A D Converter The A D Converter converts the analog RF signal to a digital signal It outputs seven bits of parallel data to IC104 TRX IC104 TRX ...

Page 26: ...24 ...

Page 27: ...s section takes the one DC and 63 AC coefficients in a DCT block and converts them to the original uncompressed data stream IC303 LIP This IC contains the three layers needed for an IEEE1394 connection The three layers are the physical link and transaction layers See the section on IEEE1394 for more details IC351 VFD De shuffling Now that decompression is complete the data must be put back in its ...

Page 28: ...26 ...

Page 29: ...nal This is because the analog 8mm signal is going to be processed so its signal can be output on the IEEE 1394 bus It should be noted here that the data output here does not contain time code information This is because it was not put on the original recording It also outputs signals for use by the viewfinder IR Transmit and Line Output circuits IC643 AOI The Y and C signals are output by IC351 V...

Page 30: ...28 ...

Page 31: ...the camcorder The audio input is converted to a digital signal by the ADC section of the block The signal is then sent to the DSP Compression stage to be pro cessed The DSP Compression block interleaves the audio data with the video data Once this is done the audio signal follows the same path as the video signal until it is put on the tape by the video heads Keep in mind that the audio signal is ...

Page 32: ...30 ...

Page 33: ...s controlling the mechanism while the servo is in digital mode This IC checks for proper information coming from all of the sensors and switches These sensors and switches have the same functions that they normally would on an analog 8mm camera This IC controls the speed and phase of the drum and capstan motors Drum The drum FG pulses are used to determine the drum speed in record mode Comparing t...

Page 34: ...32 ...

Page 35: ...ed is not digital the unit will stop adjust the servos and playback in the analog mode If the tape is not rewound The mechanism will pull the tape out of the cassette until it is in the fully loaded position The mech reverse plays the tape in the analog 8mm mode for ap proximately one second The mech plays the tape in the analog 8mm mode for approximately one second The mech reverse plays the tape...

Page 36: ...34 ...

Page 37: ...of life on the RM 95 If there are you may have problems with an individual supply to one circuit or a switching problem Try to turn the unit ON using the RM 95 If the unit does not turn ON check the indi vidual supplies If there are no signs of life from the RM 95 you can start by checking for Ever 3V at CN911 38 If this voltage is present it is probable that the problem is on the VC 213 Board If ...

Page 38: ...OARD SEE NOTE1 STEP1 REMOVE THE ORIGINAL BOARD EEPROM S IC402 IC901 STEP2 REMOVE THE NEW BOARD EEPROM S IC402 IC901 STEP3 INSTALL THE ORIGINAL BOARD EEPROM S ON THE NEW BOARD DO NOT INSTALL THE NEW BOARDS EEPROM S ON THE ORIGINAL BOARD THAT WILL BE DONE DURING THE BOARD REFURB ORDER A NEW VC 213 BOARD SEE NOTE1 INSTALL NEW VC 213 BOARD COMPLETELY FILL OUT THE CORE CREDIT FORM SUPPLIED WITH THE NEW...

Page 39: ...del we would choose Model Selection from the menu by pointing to it with the mouse and clicking the left mouse button when the selection text turns purple and the hand with finger extended is seen This will bring us to the Model Selections screen We have three selec tions to make in the model selection screen Model name Destination and Port Address Model name of course means the name of the model ...

Page 40: ... selected The adjustments from the service manual are listed in a window below the Address selection but tons This screen will be used to do all uploading and downloading of data We will give an example now of the Upload Download process Upload Download To upload the data from the camcorder press the Read button The following screen will be displayed The only difference between this screen and the...

Page 41: ...something such as the replacement of the VC 213 board we would then want to write that data back into the camera This is done by selecting Full page loading from the File drop down menu at the top left of the Radar W window When we select Full Page loading the following window is displayed Next select the file named by serial number that you want by left click ing it with the mouse After this left...

Page 42: ...icking the left mouse button Follow the instructions in the dialog box and click OK when complete The window behind the dialog box shows the steps that are being followed in the adjustment They are generally hard to follow and should be ignored The following screen will appear Click OK This ends the adjustment and returns you to the Adjustment menu We will not be doing any more Auto Adjustments si...

Page 43: ... you the Self Diagnostic his tory and the present Emergency codes These can be read from the camcorder by pressing the Read button in that window You can also clear the emergency information from this screen Auto Test can be used for scripting sequences as was used in Lanc A script would contain operation that the camcorder would complete such as Play 10 seconds Rewind 5 seconds and Stop The camco...

Page 44: ...42 ...

Search results

Summary of Contents for D8MM-01

Reviews:

Related manuals for D8MM-01

Brands by name

Popular brands

Sony D8MM-01, Training Manual

Search results

Summary of Contents for D8MM-01

Reviews:

Related manuals for D8MM-01

Brands by name

Popular brands