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It's complete and helpful manual with good quality of scan. Thanks very much.
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.
Exactly what was needed to assess the product - excellent value and great service
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.
AUDIO SYSTEM ADJUSTMENTS
â¢ Adjust both Lch and Rch. [Connection]
Audio generator 600 â¦ Attenuator VCR Audio level meter or distortion meter 47 kâ¦
CH1 RF SWP
OK CH2 NG
AUDIO LINE IN Feed signal both channelssimultaneously.
AUDIO LINE OUT
Hi-Fi Audio System Adjustment (SLV-ED60/ED70/EZ60/EZ70) â¢ Set switches and knobs to the following positions to make adjustment unless otherwise specified. INPUT SELECT switch ................... LINE AUDIO MONITOR .......................... STEREO [Adjustment Sequence] 1. AF Switching Position Adjustment 2. Frequency Response Check 3. Overall Level Characteristic and Distortion Factor Check 4. Overall S/N Check 1. AF Switching Position Adjustment (MA-350 BOARD) Purpose: Adjust the interval between A CH and B CH of tape playback output. Improve the interchangeability with other tapes and sets. When it is out of order, noisy sound is increased and big noise is heard. Mode Signal Measurement point Measuring Instrument Specified Value PB Alignment tape SP mode color bar CH1: Pin 3 of CN203 CH2: Pin 1 of CN203 Oscilloscope Fig. 7-2-5 2-4-1.
2. Frequency Response Check Purpose: Confirm that the frequency characteristic is within the specification. Mode Signal REC and PB (SP, LP mode) 400 Hz, â7.5 dBs 20 Hz, â7.5 dBs 20 kHz, â7.5 dBs Audio output terminal Audio level meter 0 Â± 2 dB
Measurement point Measurement equipment Specified value
Note: Tape path adjustment must have been completed. Confirmation Method: 1) Supply a signal of 400 Hz, â7.5 dBs to both L and R channels of Audio Line Input. 2) Connect the audio level meter to the Audio Line Output. 3) Adjust the attenuator so that the audio level meter will indicate â7.5 dBs. 4) Make recording. 5) Set an audio line input signal to 20 Hz and make recording. 6) Set an audio line input signal to 20 kHz and make recording. 7) Playback a recorded portion, and measure output levels at 400 Hz and 20 Hz and 20 kHz. 8) Confirm that the 20 Hz and 20 kHz playback output level within a range of the 400 Hz playback output level 0 Â± 2 dB.
Adjusting Method: 1) Connect MA-350 board JS450 to the GND for about 1 second to activate the RF switching position adjustment mode. 2) Press the record button to activate the AF switching position adjustment mode. 3) Check appear âA Hâ on FL display. 4) Using the channels + and â buttons, minimize a chipped portion. At this time, confirm that a noisy sound is not heard. 5) Press the pause button.