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In this part: 1) we repair associated defects. 2) we adjust the playback frequency response. 3) we change the playback head with subsequent adjustment and tuning. Individual correction on the playback amplifier for a specific head. 4) tuning and adjustment of the recording head. https://yadi.sk/i/aMHedaby_BSU4Q - Operation Manual https://yadi.sk/i/dT2mc2Wp3REo6u - Album of circuit diagrams https://yadi.sk/i/ip7TMn3u3ZQzux - Repair instructions https://yadi.sk/i/TkTzHJXr3ZR22c - Setup instructions https://yadi.sk/i/6zwY1VYR3ZR26p - Technological process of adjusting mechanical and electrical parameters.