LDA MID DiY stereo audio amplifier kit assembly instructions
General assembly advice
It is the sole responsibility of the builder to ensure that the equipment complies with the electrical safety requirements. The use of wooden and plastic boxes is not recommended due to the risk of fire.
Recommended transformer: See PSSR2Sc assembly instructions.
Assembly instructions of kit components
APBFa/APBMa assembly instructions or DPBsc assembly instructions
MID2/MID2A assembly instructions
Connection scheme
Click below for the connection scheme:
Mark the two LDA17 boards "1" and "2". Do the same for the two ABPF/APBM/DPB boards. Always connect boards marked "1" together and connect boards marked "2" together. Do not mix up connections between boards marked "1" with those marked "2".
List of connections between boards
PSSR2S - LDA17
|
PSSR2S |
LDA17 |
Connection type |
Remarks |
|
J96/J97(+VCC) |
J9(+VCC) |
solder - solder |
wire min. 0,75 mm2 |
|
J100/J104(PGND) |
J13(PGND) |
solder - solder |
wire min. 0,35 mm2 |
|
J101/J105(ZGND) |
J11(ZGND) |
solder - solder |
wire min. 0,35 mm2 |
|
J102/J106(GND) |
J3(GND) |
solder - solder |
wire min. 0,25 mm2 |
|
J98/J99(-VCC) |
J12(-VCC) |
solder - solder |
wire min. 0,75 mm2 |
|
J115(RLYIN1)* J113(RLYIN2)* |
J10(AOUT) |
solder - solder |
wire min. 0,75 mm2 |
* Connect the LDA17 marked "1" to "RLYIN1" and connect the LDA17 marked "2" to "RLYIN2" on the PSSR2S board.
MID2(A) - PSSR2S
|
MID2(A) |
PSSR2S |
Connection type |
Remarks |
|
J86(SV_1) |
J110(+9V), J111(GND) |
connector - solder |
wires min. 0,25 mm2 |
LDA17 - APBF/APBM
|
LDA17 |
APBF/APBM |
Connection type |
Remarks |
|
+ER(J5/J7), -ER(J6/J8) |
J51(ERV) |
solder - connector |
observe +/- polarity; see LDA17 assy instructions |
LDA17 - DPB
|
LDA17 |
DPB |
Connection type |
Remarks |
|
+ER(J5/J7), -ER(J6/J8) |
J52(ERV) |
solder - connector |
observe +/- polarity; see LDA17 assy instructions |
PSSR2S - APBF/APBM
|
PSSR2S |
APBF/APBM |
Connection type |
Remarks |
|
J92(PROT1)** J93(PROT2)** |
J53(PROT) |
connector - connector |
observe polarity when assembling connector |
PSSR2S - DPB
|
PSSR2S |
DPB |
Connection type |
Remarks |
|
J92(PROT1)** J93(PROT2)** |
J54(PROT) |
connector - connector |
observe polarity when assembling connector |
** Connect the ABPF/APBM/DPB marked "1" to "PROT1" and connect the ABPF/APBM/DPB marked "2" to "PROT2" on the PSSR2S board.