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There are currently no product reviews.
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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 :)
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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.
TAPE DECK ADJUSTMENTS
1. HEAD REPLACEMENT
� After replacement, demagnetize the heads by using a degausser. � Be sure to clean the heads before attempting to make any adjustments. � All wiring should be returned to the original position after work is completed.
2. HEAD AZIMUTH ADJUSTMENT
(1) Load the test tape(VTT-703, etc., 10 kHz) for azimuth adjustment. (2) Press the PLAY button. (3) Use a cross-tip screwdriver to turn the screw for azimuth adjustment so that the left and right output are maximized. (4) Press the STOP button. (5) After completion of the adjustment, use thread lock(TB-1401B) to secure the azimuth-adjustment screw.
3. AC BIAS FREQUENCY ADJUSTMENT
(1) Connect counter to T201(BS). (2) R/P switch in recording state. (3) Adjustment T801 a plastic screw , AC bias frequency : 80 kHz.
4. MOTOR SPEED ADJUSTMENT
(1) Insert the test tape(TCC-119, etc., 3,000 Hz). (2) Press the PLAY button. (3) Use a flat-tip screwdriver to turn the SVR(located inside the rear of the motor) to adjust SVR so that the frequency counter become 3,000 Hz.
5. CHECKING THE MECHANISM TORQUES AND TENSION
� Clean the head, capstan and pinch roller before making any measurement.
Measurement Cassette for measurement PLAY F.FWD REW Take-up torque PLAY : TW-211A F.FW/REW : TW-2231 30 - 60 gr.cm 55 - 120 gr.cm. 55 - 120 gr.cm. Back tension PLAY : TW-2111A 2.0 - 4.5 gr.cm --------Tape tension Drive-power cassete TW-2412 60 gr or more. ---------
This is a basic adjustment.
IC BLOCK DIAGRAM & DESCRIPTION
IC903 LA6541D(CD Driver)
Vcc 24 Vref 23 11k VIN4 22 VG4 21 Vo8 20 Vo7 19 Vcc GND Vo6 18 Vo5 17 VG3 16 11k VIN3 15 CD 14 RES 13
Level Sift
BTL Driver
BTL Driver
Level Sift
RESET
Level Sift
BTL Driver
BTL Driver
Level Sift
Regulator
11k 1 Vcc 2 Mute 3 VIN1 4 VG1 5 Vo1 6 Vo2 GND 7 Vo3 8 Vo4 9
11k 10 11 12
VG2
VIN2 Reg OUT Reg IN
-3-
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