Nakamichi 481 Service Manual - page 26
4. MEASUREMENT INSTRUMENTS
(1) Audio Generator (20 Hz — 200 kHz)
(2) AC Millivolt Meter (with dB measures)
(3) Oscilloscope (DC — 5 MHz)
(4) Distortion
Meter
(5) Speed & WOW/Flutter Meter
(6) Frequency Counter (DC — 1 MHz)
(7) Ohm
Meter
(8) DC Volt Meter
(9) AC Volt Meter
(10) Torque Gauge (DA09013A)
(11) 15kHz Azimuth Tape (DA09004A)
(12) 3 kHz Speed & Wow/Flutter Tape (DA09006A)
(13) 1 kHz Track Alignment Tape (DA09007A)
(14) 400 Hz Level Tape (DA09005A)
(15) 20 kHz PB Frequency Response Tape (DA09001A)
(16) 15 kHz PB Frequency Response Tape (DA09002A)
(17) 10 kHz PB Frequency Response Tape (DA09003A)
(18) Reference EXII Tape (DA09O21A)
(19) Reference SX Tape (DA09025A)
(20) Reference ZX Tape (DA09037A)
(21) Tilt check Gauge M-9039 (DA09039A)
(22) EH Tilt Check Gauge M-9040 (DA09O4OA)
(23) EH Stroke Check Gauge M-9042 (DA09042A)
(24) EH Stroke Check Gauge M-9051 (DA09O51A)
(25) Stroke Check Gauge M-9047 (DA09047A)
(26) Record Head Mounting Gauge M-9048 (DA09048A)
(27) Audio Analyzer T-1 00
(including Distortion, Wow/Flutter, Speed, Oscillator and dB meter)
Notes: 1. (10) — (27) are the products of Nakamichi Corporation.
2. EH Stroke Check Gauge M-9042 (DA09042A) should be used for the Models from serial Nos. A30601001 to
A30604798, and EH Stroke Check Gauge M-9051 (DA09O51A) is for the Models bearing serial Nos. A30604799
and greater.