Laney_CD650_Service_Manual电路图.pdf
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1、Laney Service Information CD650 Mixer/Amplifier Part Number - SM3041 RadioFans.CN 收音机爱 好者资料库 Laney Contents 1.DWG 3044 3.DWG 3010 4.DWG 9324 Preamp Diagram Channel 8.Preset Adjustment on PCB 9323 9.DWG 9323 Power Amp Diagram 15.Contact (Issue 2) Service Schematic 2.DWG 2615 Mains Wiring Block Diagra
2、m 5.DWG 9324 Preamp Diagram Masters 6.DWG 9324 Preamp Diagram Channel 7.DWG 9324 Preamp Diagram Masters 10.DWG 9323 Power Amp Diagram 11.Pre- amp PCB Assembly List 12.Output PCB Assembly list 13.Final Assembly List 14.Cabinet Assembly List (Issue 2) (Issue 3) (Issue 3) (Issue 2) (Issue 3) RadioFans.
3、CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 23/11/99 Issue 1 Preset Adjustment PCB 9323 To reset the amplifier bias following service or device replacement, follow these steps. 1. Before powering up the unit for the first time after replacing devices, Turn R27,R28,R127 and R128 (All 1K presets) fully cloc
4、kwise. This will bias the output devices into minimum conduction. Failure to do this may result in the amp appearing to draw excessive current, Especially if powered through a “Current limit” device. 2. Reset amplifier DC offset for Channel 1 by measuring between P2 (0V) and P107 (Speaker). Set to 0
5、V DC. 1mV, by Adjusting PS102. 3. Reset amplifier DC offset for Channel 2 by measuring between P2 (0V) and P7 (Speaker). Set to 0V DC. 1mV, by Adjusting PS2. 4. Measure DC mV across TS109 Sense and Emitter junction. Adjust R128 until a reading of 10mV 1mV is obtained. 5. Measure DC mV across TS105 S
6、ense And Emitter junction. Adjust R127 until a reading of 10mV 1mV is obtained. 6. Recheck Across TS109 as above. Reset if necessary to 10mV. 7. Check S, E junction of all four devices on channel 1 (TS105,TS109,TS111,TS114) This Should be 10mV 3mV. This completes Channel 1 re-biasing. 8. Measure DC
7、mV across TS9 Sense And Emitter junction. Adjust R28 until a reading of 10mV 1mV is obtained. 9. Measure DC mV across TS5 Sense And Emitter junction. Adjust R27 until a reading of 10mV 1mV is obtained. 10. Recheck Across TS9 as above. Reset if necessary to 10mV. 11. Double check S, E junction of all
8、 four devices on channel 2 (TS5,TS9,TS11,TS14) This Should be 10mV 3mV. This completes the amplifier re-biasing. In practice, It may be easier to disconnect the Pre-Amp loom and facia from the rear chassis. Assembly List For ( 006347 ) Preamp PCB Assembly Stock CodeItemQty Req 103815K .25W RESISTOR1
9、 1300ORO SHORTING LINK69 1303100R 5% RESISTOR2 130610K 5% RESISTOR44 13091M 5% RESISTOR6 1310100K 5% RESISTOR25 1311470R 5% RESISTOR2 13124K7 5% RESISTOR18 13148K2 5% RESISTOR22 131547K 5% RESISTOR11 131622K 5% RESISTOR13 131739K 5% RESISTOR7 13186K8 5% RESISTOR12 13263K3 5% RESISTOR39 13271K 5% RES
10、ISTOR22 133133K 5% RESISTOR3 1504 100R 2.5W RESISTOR 1 1920ZERO OHM RESISTOR38 200447UF 50V RADIAL3 201310UF 50V CAPACITOR40 2014100UF 35V RADIAL1 20242.2UF 63V RADIAL13 20251UF 63V RADIAL2 2026.47UF 63V RADIAL2 20274.7UF 63V RADIAL9 2200220NF 100V 10MM2 240833NF 250V 10MM2 240968NF 250V 10MM4 24131
11、N5 100V 5mm8 24141NF 100V 5mm2 24152.2NF 100V 5mm12 24174.7NF 100V 5mm4 2419100NF 63V 5mm9 242022NF 100V 5mm2 242110NF 100V 5mm4 2423330PF 100V 5mm2 242547NF 100V 5mm6 242615NF 100V 5mm6 260110PF 50V 10% COG6 260247PF 50V 10% COG5 2603100PF 50V 10% COG6 2604270PF 50V 10% COG3 2605470PF 50V 10% COG21
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