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Exactly as described, a Service Manual complete with the schematics and PCB layout delivered in a timely manner. Many thanks for the great service.
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some of the writing is a bit blur but the part in the schmatic was great and i have fixed the machine thanks
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Well.. I'd searched for this manual and although I found many copies online I was pleased to find your website with a well balanced pricing system and easy to search and follow links. That together with the very quick response time was just what I was looking for.. being a very impatient tech.. ;-) I had the service manual in front of me within a short time.
Bookmarked.. and you can bet I will always come here first for my service & user manuals..
best regards
Ed(Tony) Foley
G7WHK
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I will definitely be back for more information when I need it.
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The service manual when downloaded and printed out was clear and easy to read. I would have liked to have been able to enlarge some details, but this was not possible as the file permissions did not allow this. The service was very good. The time taken from placing my order to downloading the document was only a few minutes.
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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