Marantz 2270 Restoration
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Highlights
All controls and switches cleaned using DeoxIT D5
Protection-Relay replaced with Omron MY2 24VDC
Diffuser paper replaced behind tuner scale
Any non-working festoon lamps replaced
All electrolytic capacitors replaced
Set voltage adjustment to 35VDC
Set DC offset alignment to 0VDC
Set idle-current adjustment to 5mVDC
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Chassis
Qty 2 - 10000uf/80V (snap-in)
Qty 1 - 33uf/6.3V (signal meter)
Qty 2 - 2.2uf/250V (optional)
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P400 Tone Amplifier
Qty 1 - 100uf/35V
Qty 2 - 10uf/35V
Qty 4 - 3.3uf/25V (use film)
Qty 2 - 1uf/35V (use film)
Qty 2 - 1uf/25V (use film)
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P700 Phono Amplifier
Qty 1 - 100uf/50V
Qty 2 - 22uf/6.3V tantalum (use electrolytic)
Qty 4 - 2SC1000 transistor (use KSC1815)
Qty 2 - 2SC458 transistor (use KSC1845)
Qty 2 - 1S1212 diode (one 1N4148 for each)
Qty 1 - VD1212 diode (two 1N4148 in series)
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P750 Power Amplifier
Qyt 2 - 22uf/35V
Qyt 4 - 10uf/35V
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P800 Power Supply and Protection-Relay
Qty 1 - 470uf 63V
Qty 1 - 470uf 16V
Qty 2 - 330uf 50V
Qty 1 - 220uf 10V
Qty 1 - 47uf 16V
Qty 1 - 10uf 50V
Qty 1 - 3.3uf 50V
Qty 1 - Relay Omron MY2 24VDC
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*Some voltage ratings differ from OEM
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Marantz 2270 Documentation
