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There are currently no product reviews.
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It's complete and helpful manual with good quality of scan. Thanks very much.
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The service was quick and simple, finding the service manual easy and it appears to be the original with colour schematics. It contained the info I was after and so sorted the problem.
I have copied it to CD and attached the envelope to the inside back cover of the owners manual. Good manual and excelent service. Robin Wood, Wood Electronics, New Zealand.
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Exactly what was needed to assess the product - excellent value and great service
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Nice to have the service manual for the Sony DCR-TRV345E now. The document is of excellent quality.
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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 :-)
Note:
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.
R-216(G) R-216(IN) R-216(W) R-216(Y)
TEST PROCEDURES PROCEDURE LETTER COMPONENT TEST
A
MAGNETRON TEST NEVER TOUCH ANY PART IN THE CIRCUIT WITH YOUR HAND OR AN INSULATED TOOL WHILE THE OVEN IS IN OPERATION. CARRY OUT 3D CHECKS. Isolate the magnetron from the high voltage circuit by removing all leads connected to the filament terminal. To test for an open circuit filament use an ohmmeter to make a continuity test between the magnetron filament terminals, the meter should show a reading of less than 1 ohm. To test for a short circuit filament to anode condition, connect ohmmeter between one of the filament terminals and the case of the magnetron (ground). This test should be indicated an infinite resistance. If a low or zero resistance reading is obtained then the magnetron should be replaced. MICROWAVE OUTPUT POWER (IEC60705) The following test procedure should be carried out with the microwave oven in a fully assembled condition (outer case fitted). Microwave output power from the magnetron can be measured by IEC 60705, i.e. it can be measured by using water load how much it can be absorbed by the water load. To measure the microwave output power in the microwave oven, the relation of calorie and watt is used. When P(W) heating works for t(second), approximately P x t/4.187 calorie is generated. On the other hand, if the temperature of the water with V(ml) rises �T (�C) during this microwave heating period, the calorie of the water is V x �T. The formula is as follows; P x t / 4.187 = V x � T+ 0.55 x mc (T2-T0)/4.187 Our condition for water load is as follows: Room temperature (T0) ... around 20°C Water load ..................................1000 g Heating time .............................. 52 sec. T2 ............................ Final Temperature P (W) = 4.187 x V x �T / t + 0.55 x mc (T2-T0)/t Power supply Voltage .............. Rated voltage Initial temperature (T1) ...................... 10±1°C Mass of container (mc) ......................... 330 g P = 80 x �T + 0.55 x mc (T2-T0)/52
Measuring condition: 1. Container The water container must be a cylindrical borosilicate glass vessel having a maximum material thickness of 3 mm and an outside diameter of approximately 190 mm. 2. Temperature of the oven and vessel The oven and the empty vessel are at ambient temperature prior to the start of the test. 3. Temperature of the water The initial temperature of the water is (10±1)�C. 4. Select the initial and final water temperature so that the maximum difference between the final water temperature and the ambient temperature is 5�C. 5. Select stirring devices and measuring instruments in order to minimize addition or removal of heat. 6. The graduation of the thermometer must be scaled by 0.1�C at minimum and an accurate thermometer. 7. The water load must be (1000±5) g. 8. �t� is measured while the microwave generator is operating at full power. Magnetron filament heatup time is not included. NOTE: The operation time of the microwave oven is �t + 3� sec. 3 sec. is magnetron filament heat-up time. Measuring method: 1. Measure the initial temperature of the water before the water is added to the vessel. (Example: The initial temperature T1 = 11�C) 2. Add the 1 litre water to the vessel. 3. Place the load on the centre of the shelf. 4. Operate the microwave oven at HIGH for the temperature of the water rises by a value � T of 10 �C. 5. Stir the water to equalize temperature throughout the vessel. 6. Measure the final water temperature. (Example: The final temperature T2 = 21°C) 7. Calculate the microwave power output P in watts from above formula.
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