I cannot directly host or attach PDF files, but I can tell you exactly where to find the official Harman Kardon AVR 70 Service Manual .
The Service Manual (different from the Owner's Manual) contains schematics, PCB layouts, parts lists, and adjustment procedures. harman kardon avr 70 service manual
| Category | Feature | | :--- | :--- | | | High-current, ultra-wide bandwidth design (stable into 4 ohm loads) | | Audio Inputs | 5 analog audio inputs (including CD, Tape, Video 1-3) | | Digital Audio | 2 optical + 1 coaxial digital input | | Video | Composite video switching (3 in, 1 out). No HDMI. | | Tuner | AM/FM with 30 presets (RDS in some regions) | | Connectivity | Front-panel auxiliary input (3.5mm minijack); Headphone jack | | EZ Set/EQ | Automatic speaker calibration using supplied microphone | | Remote | System remote (can control HK DVD/CD players) | | Dimensions | 17.3" W x 6.6" H x 15.8" D (440 x 168 x 402 mm) | | Weight | ~18 lbs (8.2 kg) | I cannot directly host or attach PDF files,