Harman Kardon HK 3490 Service Manual page 11

harman/kardon
<8>FRONT PCB(43-1) REMOVAL
1. Remove the Top-cabinet, referring to the previous step<1>.
2. Remove the Front Panel ASS'Y, referring to the previous step<2>.
3. Remove the Potentiometer PCB(43-4) , referring to the previous step<3>.
4. Remove the PHONE PCB(43-3), referring to the previous step<4>.
5. Remove the Volume PCB(43-5), referring to the previous step<5>.
6. Remove the POWER LED PCB(43-2), referring to the previous step<6>.
7. Remove the Front input video PCB(43-6), referring to the previous step<7>.
8. Remove 12 screws(S3) and then remove the Front PCB(43-1).
<9>TUNER MODULE(34) REMOVAL
1. Remove the Top-cabinet, referring to the previous step<1>.
2. Disconnect the connector(CON1-Card cable) from connector(CN26) on the Input PCB(45).
3. Remove 2 screws(S5) and then remove the Tuner Module(47).
<10>VIDEO PCB(43-8) REMOVAL
1. Remove the Top-cabinet, referring to the previous step<1>.
2. Disconnect the connector(CN85-Card cable) from connector(CN85) on the Input PCB(45).
3. Remove 4 screws(S8,S5) and then remove the Video PCB(43).
<11>DSP PCB(46-1) REMOVAL
1. Remove the Top-cabinet, referring to the previous step<1>.
2. Disconnect the connector(CN51,52,71-Card cable) from connector(CN51,52,71) on the Input PCB(45).
3.Disconnect the connector (CN51) from lead wire(BN51-11P) on the Tr PCB(46-2).
4. Remove 5 screws(S8,S5,S14) and then remove the DSP PCB(46-1).
<12>INPUT PCB(46-1) REMOVAL
1. Remove the Top-cabinet, referring to the previous step<1>.
2. Disconnect the connector(CN21-Card cable) from connector(CN21) on the Main PCB(44-1).
3. Disconnect the connector (CN24) from lead wire(BN24-5P) on the Main PCB(44-1).
4. Remove 7 screws(S5,S14) and then remove the DSP PCB(46-1).
<13>POWER TRANS(30) REMOVAL
1. Remove the Top-cabinet, referring to the previous step<1>.
2. Disconnect the connector (CN15,CN12) on the Trans PCB(43-7) from lead wire(BN15-3P,BN12-2P) on the Main
PCB(44-1).
3. Disconnect the connector (CN11,CN14,CN15) on the Main PCB(44-1) from lead wire(BN11-3P,BN14-13P,BN15-
3P) on the Trans PCB(43-7)
4. Remove 4 Trans screws(S15) and then remove the Power Trans(42).
<14>MAIN PCB ASS'Y(44) REMOVAL
1. Remove the Top-cabinet, referring to the previous step<1>.
2. Remove the Power Trans(43-7),referring to the previous step<13>.
3. Remove the TUNER MODULE(34), referring to the previous step<9>.
4. Remove the VIDEO PCB(43-8), referring to the previous step<10>.
5. Remove the DSP PCB(46-1), referring to the previous step<11>.
6. Remove the INPUT PCB(46-1), referring to the previous step<12>.
HK 3490/230 Service Manual
Page 11 of 70