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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
 ;
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 :-)
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.
5
6
7
8
Protection circuit that activates against a POW ERR error
2 When the main power supply becomes LO level because of short-circuit or disconnection of connectors
2 -1 Short-circuit-detection circuit for the amplifier power circuit (+15 V[VP+15], VD+5, -12 V [VA-12]) Circuit for shutting the power off when VP+15, VD+5, or VA-12 is short-circuited to ground (GND) 2 -3 Checking for VA+12 or VM+12 is short to Gnd or Not.
A
E
IF/AF Assy
DVD+12 VD+12 VA+12 Q8771 2SD2012 VP+15 VA+12 VP+15
M
MOD. AMP Assy
VD+5 R108 27k
B
VD+5
VH+ (VP+15) Q101_2/2 C8771 D101 (D102)
B E2 (Q103_2/2) B2 C2 C2 E2
Q101_1/2 E (Q103_1/2)
C
+ +
Q102_2/2 (Q104_2/2)
B2
B
R102 (R105) 10k
to XPROTECT C (µ-com) Q102_1/2 (Q104_1/2)
E
R101 (R104) 1k + C101 (C102) 1/50
B
R109 820 D8701 to XPROTECT (µ-com) GNDM D8702
A
R103 (R106) 10k
D105 (D106) VH� (VA�12)
� In Normal mode, as Q101 (Q103) (E2, B2, C2) and Q102 (Q104) (E2, B2, C2) are on, the voltage at Point A is about 5 V. The voltage at Point B is therefore about the same. As Q101 (Q103) (E, C, B) is off, Q102 (Q104) (E, C, B) is also off. (1) When VH+(VP+15) is short-circuited to GND As the voltage at Point B becomes almost ground potential, and Q101 (Q103) (E, C, B) then Q102 (Q104) (E, C, B) are turned on, the level of XPROTECT becomes low. � The microcomputer detects the XPROTECT level and shuts the power to the unit off. (2) When VH-(VA-12) is short-circuited As the electric potential of VE at Q102 (Q104) (E2, C2, B2) becomes the same as that at VB, Q102 (Q104) (E2, C2, B2) is turned off. Following this, Q101 (Q103) (E2, B2, C2) is turned off, which changes the voltage at Points A and B to a value other than 5 V. Therefore, Q101 (Q103) (E, C, B) then Q102 (Q104) (E, C, B) are turned on, the level of XPROTECT becomes low. (3) When VD+5 is short-circuited The level of the XPROTECT line becomes low. The microcomputer detects the XPROTECT level and shuts the power to the unit off. 2 -2 Short-circuit-detection circuit for the DVD power supply (VP+8)
If VFDP is short-circuited to GND, or if the DC electric potential at FL AC1 becomes GND level (in Normal mode: about -27 V) because of a failure in the DC bias circuit of FL AC1, Q107 then Q115 are turned on, and the level of XPROTECT becomes low. � The microcomputer detects the XPROTECT level and shuts the power to the unit off.
C
3 When the FAN connector is disconnected or when rotation of the fan is interrupted
M
MOD. AMP Assy
VD+5 VPF+15 1/50 R3654 1.8k R8772 R8771 10 10k
C
to XPROTECT (µ-com)
R108 27k
C2
D3658 UDZS7.5B
B
A
Q3651_2/2 RN1901
B2
Q3652 DTA124TK R3657 33(1/4W) FAN+ D3655 1SS355 C8773 FAN� D3656 S5688G R3656 22k V-12F 1/50
D
Q3651_1/2 C3652 D3657 RN1901 47/50 1SS355 R3655 8.2k Q3654 2SD2144S
M
MOD. AMP Assy
VD+5 R108 27k
VP+8 D104 1SS355
If no fan is connected between FAN+ and FAN-, or when the fan cannot rotate because of a foreign object caught in the blades, the BASE of Q3652 becomes OPEN, and Q3652 and Q3651 (E, C,
E
XPROTECT
Q106 DTC124EUA Q107 DTA124EUA TUNER
B) are turned off. Then Q3651 (E2, B2, C2) is turned on, and the level of XPROTECT becomes low. � The microcomputer detects the XPROTECT level and shuts the power to the unit off. When FAN+ and FAN- are short-circuited, the electric potential at Point A becomes higher than GND level by the addition of the values at D3656 and D3657. As this value is lower than that at D3658, Q3651 (E, C, B) is turned off, Q3651 (E2, B2, C2) is turned on, and the level of XPROTECT becomes low.
F
As the TUNER line is fixed to GND level, Q107 is always on. If the level at VP+8 falls to GND level because of short-circuit, etc., Q106 is turned on, and the level of the XPROTECT line becomes low. � The microcomputer detects the XPROTECT level and shuts the power to the unit off.
XV-EV61
5 6 7 8
C8772 0.047
E2
E
+
R3658 2.2k
131
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