Roland SH-2000 - Component Schematics and Layouts; OP-12 C Schematic and Layout

4. OP-12C (OP-12C: 149-012C; OP-128: 149-0128)
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µPC1458C
CA1458G
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4
TOP VIEW
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CA3080
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TOP VIEW
c
BOE 25C828 R
seE 25A733 Q
D.S 25K30A Y/GR
TOP VIEW
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~ 152473 (15953, 151555)
C J Metal Oxide Film Resistor
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NOV 10 1977 SH-2000
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NOTE:
1.. At present, FET 25K30A GR is used for Q 504 and 505 ..
In older products 25K30A Y is used, which can be
changed to 25K30A GR by changing R513 and 514
(33KQ) to 100KD, at the same time ..
2 .. R575, 47KQ is mounted on foil pattern side in older
PCB (OP-12B) .. Difference between OP-12C and B is
solely that point. They are interchangeable ..
lk#Roland