neptunlabs

• A65/75 Service Manual Issue 1.0 DiVA A65, A75 & P75 Plus Amplifi ers ARCAM ARCAM. • Contents List Contents list Circuit description Service guide Circuit diagrams Component overlays Circuit board parts list General assembly parts list. • SIM Module Power Amplifier The connector PL161 (P75 only) allows the fitting of the ARCAM The new topology is a high gain voltage feedback design, with a SIM module. In order to allow this to operate LK172 & LK173 must bipolar output stage. • A65, A75 & P75 Service Guide Fault diagnostics Fault Action No power Check mains fuse Check transformer connections Check power supply rails Stuck in protection Check power supply rails Check protection circuit voltages Check for dry joints on o/p devices Intermittent audio on one channel Check for dry joints around o/p devices.

• LEFT CHANNEL L942C5_1. 78 Card Deck Edition Miniature Tarot Tarot. 0.SCH PROTECTION SP2_SEND_L SP2_RETN_L PWRLEFT OP_L PHONO & INPUTS L942C3_1.0.SCH TONE CONTROL L942C4_1.0.SCH SELOPL SELOPL SELOPR SELOPR PWRLEFT ACSENSE HPSW2 HPSW2 PWRRIGHT TAPECONTROL TAPOL PROT_OP_L TAPOL TAPOR PROT_OP_R TAPOR SP2_SEND_L PROTECTION MUTE SP2_RETN_L HPSW1 HPSW1 OP_L RIGHT CHANNEL OP_R L942C6_1.0.SCH SP2_SEND_R. • +38V_L +37V C600 + C603 C614 C613 100U EL 100V 100N PE 100V 100U 50V YXF LOW Z R601 R602 R615 100N PE 100V 100R MF 100R MF 47R MF 0V_HF 0V_HF D601 0V_HF ZENER 400MW 27V Q601 Q600 Q602 BC556B BC556B BC556B. • D907 MOTSUP900 1N4003F C920 C918 1M0 25V 100N CD Z905 0V_DIG 0V_DIG BA6109 VOLM901 VOLMOT900 C913 10N CD 1Y271 SK900 R905 FFC10V 33K MF C912 Q900 R901 0V_DIG BC556B 10N CD 12K MF VOLM900 Disp H Disp F Disp D Disp B Z907A 0V_DIG.