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There are currently no product reviews.
 ;
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.).
 ;
The Service Manual for the Kenwood KR-V55R provided by owner-manuals.com was as described/advertised. The contents provided the necessary information to effect a diagnosis of the unit. The schematics above all else was instrumental in tracing the the signal flow from component to component.
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This manual was the factory original. Excellent value and contained all the details I needed. Easy dowwnload provided the information when I needed it.
Block Diagram
VA-175 (2/2)
VA-175 (2/2)
Block Diagram
FROM 1/2 CN1 77 CN1 81
15
Y(EN)
HD OUT
AT,1-77
Y SYNC OUT SYNC VD OUT
DM,1-81/AD,1-82 IC1002(1/2) 5,6 3 + RV1201 VBS SET UP LEVEL IC1101 1 +9V 2 REG TP1102 1 FL1102 LPF PAL + AMP BUFF CLAMP R-Y 2
IC1201 Y AMP 6
DL1201 DELAY
Q1203 BUFF
Q1204 BUFF
34 TO 1/2 CN1 AT,1-78 DM,1-79
78 CN1 SKIN BLK OUT 79 CHROMA BLK
11 TO 1/2 FROM 1/2 51 CLP3 FL1101 +12.5V NTSC Q1103 Q1104 Q1110 Q1101-Q1102 NTSC I/V AMP I SIG S1101 I/V PAL ON/OFF LPF
BLK
13 TO 1/2 FROM 1/2 FROM 1/2 BLK2 DL SYNC SYNC OUT 18 21 R-Y(EN) B-Y(EN)
16 IC1102
Q1111 RV1103 I/V BLACK BAL TP1101 CHROMA ENCODER 8 BUFF
FL1104 LPF RV1104 CHROMA LEVEL
TP1103 Q1112 BUFF
Q1105 CLP2 5 TO 1/2 Q/U AMP + S1102 Q/U ON/OFF
FL1103 LPF +
Q1106,Q1107 AMP RV1101 Q/U BAL
Q1108 BUFF
Q1109 CLAMP 4 B-Y CONT L ALT SC SC 6 14 15 3
Q SIG BF BF IC1001 BURST SET L1003 C1005,C1006 LPF
Q1001 BUFF RV1003 BF LEVEL
Q1002 BUFF RV1004 BF PHASE
Q1004 BUFF Q1003 BUFF
RV1102 Q/U BLACK BAL
SC
RV1001 RV1002 BF BF START STOP
L1105,C1129 LPF
IC1002(2/2) 1,2 7 L ALT
BLKG
IC1003(1/3) 12,13 11
IC1003(2/3) IC1003(3/3) 1 3 4,5 6 2
Q1113 BUFF
FL1105 SC SHIFT
Q1114 BUFF
HD CLP
24 TO 1/2
Q1201 DL SYNC BUFF
FL1201 LPF
Q1202 BUFF RV1202 SYNC LEVEL +
Q1205-Q1208 VBS Y AMP
VBS(WF)
32 TO 1/2
CHU LOCK
59 TO 1/2 CN1 H CONT OUT 80 AU,1-78
Q1209,Q1210 BUFF RV1203 VBS LEVEL
IC1202 3 VBS 1 6 AMP Q1211 BUFF
TP1201 VBS 1(X)OUT
CN1 45 MB,CN11-A1
VBS1 DIAG
57 CN1 47
VBS 2(X)OUT I SIG Q SIG VBS3 S1201 VBS3/SYNC IC1203 3 VBS 3 6 AMP Q1212 RV1204 VBS3 BAL BUFF VBS3 DIAG
MB,CN11-A2
VBS 3(X)OUT
CN1 49
MB,CN11-A3
SYNC CV1202 VBS3 FREQ
55
Y(CB)
1
TO 1/2
VA-175 (2/2)
CCU-550/550P
CCU550-VA175UC (2/2) BLOCK/M#1, #2
R-Y(CB)
5
TO 1/2
B-Y(CB)
8
TO 1/2
CCU-550/550P
3-9
3-9
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