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Nice to have the service manual for the Sony DCR-TRV345E now. The document is of excellent quality.
MACKIE HR824 26 pages English-only Service Manual contains:
1) HR824 technical overview with the description of front and rear panel switches.
2) HR824 specs
3) Block Diagram
4) Wiring Diagram
5) Packaging management
6) Spare part & final assembly list (for PCB rev A and B) + exploded view
7) Test Procedures (where, how to measure voltage...) including Test Point diagram on the PCB.
8) IC and Transistor charts.
Excellent guide: very clear, good scan quality enabling us to print readable diagram :-)
Mackie HR824 make extensive use of surface mount devices (SMD). Service on the HR824 must
only be undertaken by experienced service technicians with the right tools, experience and patience to perform surface mount rework when needed.
This Service manual is very well scanned and its clean to read, no any anti-theft words that un-english could understand. I got my CCD600 working with this manual and itΒ΄s clear shematics :)
I was very pleased with the service provided and was surprised at how good the quality was of the manual. I thought it may be a third generation copy or so, but it is as good as the websites that charge 3 times this much. I repair some electronics for family and friends without charge, so this is perfect for me. Thank you very much.
The service was great and the document was also great. Highly recommend!!!!
If anyone has a users manual... Please email me. need one. $ email@example.com
6.2 CHECKING THE GRATING AFTER CHANGING THE PICKUP UNIT
â¢ Note : The grating angle of the PU unit cannot be adjusted after the PU unit is changed. The PU unit in the CD mechanism module is adjusted on the production line to match the CD mechanism module and is thus the best adjusted PU unit for the CD mechanism module. Changing the PU unit is thus best considered as a last resort. However, if the PU unit must be changed, the grating should be checked using the procedure below.
â¢ Purpose : To check that the grating is within an acceptable range when the PU unit is changed. â¢ Symptoms of Mal-adjustment : If the grating is off by a large amount symptoms such as being unable to close tracking, being unable to perform track search operations, or taking a long time for track searching. â¢ Method : â¢ Measuring Equipment â¢ Measuring Points â¢ Disc â¢ Mode
â¢ Oscilloscope, Two L.P.F. â¢ E, F, REFO â¢ ABEX TCD-784 â¢ TEST MODE
L.P.F. 100kâ¦ 390pF Xch Ych
100kâ¦ 390pF L.P.F.
â¢ Checking Procedure 1. In test mode, load the disc and switch the 5V regulator on. 2. Using the ] and [ buttons, move the PU unit to the innermost track. 3. Press key 3 to close focus, the display should read "91". Press key 2 to implement the tracking balance adjustment the display should now read "81". Press key 3 2 times. The display will change, returning to "81" on the fourth press. 4. As shown in the diagram above, monitor the LPF outputs using the oscilloscope and check that the phase difference is within 75Â° . Refer to the photographs supplied to determine the phase angle. 5. If the phase difference is determined to be greater than 75Â° try changing the PU unit to see if there is any improvement. If, after trying this a number of times, the grating angle does not become less than 75Â° then the mechanism should be judged to be at fault. â¢ Note Because of eccentricity in the disc and a slight misalignment of the clamping center the grating waveform may be seen to "wobble" ( the phase difference changes as the disc rotates). The angle specified above indicates the average angle. â¢ Hint Reloading the disc changes the clamp position and may decrease the "wobble".