The delivery of this manual was very fast, less than 8 hours. The manual is very clear and concise, and helped a great deal in the repair and final setup of the Hitachi HMA-G2 Amplifier.
Great service. The manual was exactly what I was looking for: schematic + layout. I managed to fix the player. Highly recommended!
Text excerpt from page 160 (click to view)
Fig. 5-3 shows the waveform timing of the 2.8 V DC-DC converter circuit.
Fig. 5-3 Waveform timing chart (When MiniDisc is operated on rechargeable lithium-ion battery) 4. Generating the REC DRIVE logic voltage 5 V is generated form the CLV circuit voltage 2.8 V by the step-up converter consisting of the REC DRIVE IC506 pin 7 [VG], L514, D502 and C565. The generated 5 V is used for the logic circuit inside IC506.
