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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.
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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 it´s clear shematics :)
NO.22 Hi-Fi TROUBLESHOOTING(2) (Hi-Fi Models) FLOW CHART NO.24 LINEAR SOUND MODE TROUBLESHOOTING (1)
VC-A310X/NZ VC-H725X VC-H730X/NZ
No linear sound recording (E-E mode is possible) No Hi-Fi sound recording(E-E mode is possible)
NO Check the AUDIO MUTE (H) line between pin
Is there "L" level at pin (99) of IC201? (99) IC201 and pin (81) of IC701.
NO Replace IC651. YES
Check peripheral circuit of IC651 as YES shown in table. Is there a signal at pin(4) of IC201? Replace IC201.
L-ch pins(16),(17),(18),(19)
R-ch pins(35),(34),(33),(32) NO
Is the supply voltage 12V fed to pin(2) of Check PC 12V line.
YES YES
YES T601? Check Hi-Fi 5V line.
NO
Is there signal (Bias) at pin (5) of T601? Q603) and FE BIAS CTL line.
of IC651?
NO Is there signal (Bias + Audio sig.) at pin (6)
YES of T601? NO Is the supply voltage of 5V fed to pin(25)
Check the Bias oscillation circuit(T601,Q602,
Is there REC FM signal outputted to the pins(21) (24)(ch-1)/pins(21) to (22)(ch-2)
of IC651 ? YES
YES Check peripheral circuits of T601.
Is there H level at pin(29) of IC651? Check AH-MZ harness.
YES
NO YES
Check the MH-AM harness and A/C head.
Check or replace the cylinder. Check the Hi-Fi CTL (H) line between pin (29) IC651and pin(22) of IC701.
FLOW CHART NO.25 LINEAR SOUND MODE TROUBLESHOOTING (2) YES No linear sound playback (E-E mode is possible) Check the record AGC setting resistor
R678 at pin(37) of IC651.
46
Is there a signal at pin(100) of IC201?
YES YES
Are MH-AA harness and the PB AMP. Replace IC651. NO peripheral parts normal?
FLOW CHART NO.23 Hi-Fi SOUND MODE TROUBLESHOOTING(3) (Hi-Fi Models) Clean A/C Head.
YES
No Hi-Fi sound playback(E-E mode is possible) NO Is the azimuth height of A/C head properly
adjusted?
Replace IC651. YES
YES Replace A/C head.
Readjust azimuth height. Is there playback envelope signal(about NO Is the supply voltage of 5V fed to pin(25) 300mVp-p) outputted to the pins(29),(30) of IC651? NO
of IC651? A-H.SW.P. signal pin(27) Is there "L" level at pin (99) of IC201? YES (99) IC201 and pin (81) of IC701. IC651?
NO
Check the AUDIO MUTE (H) line between pin
YES Check peripheral circuit of IC651 as shown in table. NO
L-ch pins(16),(17),(18),(19) Check the A-H.SW.P. line between pin
Is there a signal at pin(11) of IC201? Replace IC201.
NO
R-ch pins(35),(34),(33),(32) YES (27) IC651 and pin(28) of IC701.
YES Is there audio signal inputted at pin(62) Check line between pin (11) of IC201 and
Replace IC651. IC651? pin (62) of IC651.
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