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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 :)
HTC-WX5
Record Bias Adjustment (Deck B) Procedure: 1. 2. 3. 4. Press the p (CD) button while pressing the DIRECTION MODE button. While pressing the p (CD) button, press the ª (TAPE A) button, set the function to �deck B�. Insert a tape into deck B, press the r REC button, and then press the ( button to start recording. Mode: Record
INPUT POINT 1) 315 Hz } 50 mV (�23.8 dB) 2) 10 kHz AF OSC attenuator 600 � PFJ-1 set blank tape CS-123
Record Level Adjustment (Deck B) Procedure: 1. 2. 3. 4. Press the p (CD) button while pressing the DIRECTION MODE button. While pressing the p (CD) button, press the ª (TAPE A) button, set the function to �deck B�. Insert a tape into deck B, press the r REC button, and then press the ( button to start recording. Mode: Record
INPUT POINT 315Hz 50 mV (�23.8 dB) 600 � attenuator PFJ-1 set
CD SECTION
Note: 1. CD Block is basically constructed to operate without adjustment. Therefore, check each item in order given. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10M� impedance. 4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks. S Curve Check
oscilloscope
E-F Balance (1 Track Jump) check
oscilloscope BD board TP (TEO) TP (VC)
AF OSC
blank tape CS-123
Procedure: 1. Connect oscilloscope to test point TP (TEO) on BD board. 2. Turned Power switch on. 3. Put disc (YEDS-18) in to play the number five track. 4. Press the �P (Pause)� button. 5. Check the level B of the oscilloscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following: � A/B x 100 = less then ± 7 (%) � B = 500 ± 100 mVp-p
BD board TP (FEO) TP (VC)
Procedure : 1. Connect oscilloscope to test point TP (FEO). 5. Mode: Playback
recorded position level meter
1 track jump waveform
Center of the waveform
5.
Mode: Playback
recorded position set
PFJ-1
set
PFJ-1
level meter
2. 3. 4.
Connect between test point TP (FOK) and Ground by lead wire. Turn Power switch on. Put disc (YEDS-18) in and turned Power switch on again and actuate the focus search. (actuate the focus search when disc table is moving in and out.) Check the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 3 ± 1Vp-p.
S-curve waveform symmetry
0V
B A (DC voitage)
5.
output
output point
point
level : 500 mV ± 100 mVp-p
Symmetry
6.
Confirm playback the signal recorded in step 2 become adjustment level as follows. If these levels do not adjustment level, adjust the RV341 (LCH) and RV441 (R-CH) on the AUDIO board to repeat steps 3 and 4.
6.
Confirm playback the signal recorded in step 2 become adjustment level as follows. If these levels do not adjustment level, adjust the RV301 (LCH) and RV351 (R-CH) on the MAIN board to repeat steps 3 and 4.
A Within 3 ± 1 Vp-p B
Adjustment Location: [BD BOARD] (Conductor Side)
TP (RF) TP (VC) TP (FOK)
Adjustment level: The playback output of 10 kHz level difference against 315 Hz reference should be ± 1.0 dB. Adjustment Location: AUDIO board
Adjustment level: Output point from PFJ-1 playback level: 47.2 to 53.0 mV (�24.3 to �23.3 dB) Adjustment Location: MAIN board 6. After check, remove the lead wire connected in step 2. Note: � Try to measure several times to make sure than the ratio of A : B or B : A is more than 10 : 7. � Take sweep time as long as possible and light up the brightness to obtain best waveform. RF Level Check
oscilloscope
CN101
IC101 TP (TEO) TP (FEO)
IC102
[AUDIO BOARD] (Component Side)
[MAIN BOARD] (Component Side)
BD board TP (RF) TP (VC)
TP (GND) IC103
RV341(Lch),RV441(Rch) Record Bias
RV311(Lch),RV411(Rch) Playback Level (Deck A)
CNS102
RV301 Record Level (L ch)
Procedure : 1. 2. 3. 4. Connect oscilloscope to test point TP (RF) on BD board. Turned Power switch on. Put disc (YEDS-18) in and playback. Confirm that oscilloscope waveform is clear and check RF
IC102
RV301 RV401 RV441 RV341
CNP105
RV311 RV411
RV301(Lch),RV401(Rch) Playback Level (Deck B)
signal level is correct or not. Note: Clear RF signal waveform means that the shape ��� can be clearly distinguished at the center of the waveform.
CNS101 RV351 Record Level (R ch)
RF signal waveform
VOLT/DIV : 200mV TIME/DIV : 500ns
level : 1.3 ± 0.3 Vp-p
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