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This is the second Manual I have ordered from owner-manuals, I give it five stars because it is exactly what I expected given the age of the equipment. So the contents look a bit aged and the pictures a bit grainy, it fulfills my needs and I am glad I can still get hold of them.
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thank u so much for this manual that was so cheap that i thought it was a scam but i gambled anyway because it was too good of a deal to pass up and behold,the manual has everything and details of everything even the screws and im still amazed and very happy with my manual .so take my word and jump on it before they realize how cheap they selling thier manuals..thank you so much for taking time to read my thoughts
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I do not have very much to say.
The price is quite covenient, delivery was better as promised (about 12 ours, against the specified 24 hours if I remember well), and the quality of the PDF is more than acceptable.
The Service Manual of Sansui R30 itself is also satisfactory: good graphic for schematics and layouts, simple and well structured.
Giovanni Bianchi
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Happy to find finally a schematic for this amplifier. The schematic is of good quality, the pcb layout is useless: all is black. Never the less, it is very easy to find the components on the board using the schematics.
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Hard to find manual was ready the next day. Scans were very legible (including schematics). All the essential parts of the service manual were present (adjustment procedure, schematics, and parts list). It would have been nice if the rest of the manual was included (disassembly procedure, theory of operation, etc.).
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2
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Protection circuit that activates against a PRTCT ERR error
A
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 (VH+[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 Short-circuit-detection circuit for VFDP
D
6CH AMP Assy
VD+5 R108 27k
E
TRADE2 Assy
D
6CH AMP Assy
VD+5
VD+5
VH+ (VP+15) Q101_2/2 D101 (D102)
B E2 (Q103_2/2) B2 C2 C2 E2
Q101_1/2 (Q103_1/2)
E
B
R108 to 27k XPROTECT C (µ-com) Q102_1/2 (Q104_1/2)
E B
R101C (R104) 1k + C101 (C102) 1/50
B
R102 (R105) 10k
Q102_2/2 (Q104_2/2)
B2
to XPROTECT (µ-com) Q115 DTA124EUA Q114 2SD2114K (VW) VA-12
R114 82k R112 1k R113 220k
FL AC2
A
R103 (R106) 10k
R109 820 D105 (D106) VH� (VA�12)
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, Q114 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.
* ( )means the wiring No. of VP+15 line.
� 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.
C
(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)
3 When the FAN connector is disconnected or when rotation of the fan is interrupted
D
6CH AMP Assy
VD+5 VPF+15 R3654 1.8k
C
D
to XPROTECT (µ-com)
R108 27k
C2
D3658 UDZS3.9B
B
A
Q3651_2/2 RN1901
B2
Q3652 DTA124TK R3657 33(1/4W) FAN+ D3655 1SS133 FAN� D3651 1SS133
E2
E
+
R3658 2.2k
Q3651_1/2 C3652 D3657 RN1901 47/50 1SS355 R3655 8.2k Q3654 2SD2144S
D
E
6CH AMP Assy
VD+5 R108 27k
VP+8 D104 1SS355
R3656 22k V-12F
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 Q3651-1/2 (E, C, B) are turned off. Then Q3651-2/2 (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.
XPROTECT
Q106 DTC124EUA Q107 DTA124EUA TUNER
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.
98
1 2
XV-DV333
3 4
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