Akai GX-747 dbx Service Manual

VR I 50KB VR2 20KB
(3- 3/4in) (7- l /21nl
r---.__
'·" ...._ _____________ _....
10. TAPE SPEED ADJUSTMENT
(Refe r to Fig. 7-10)
Set the Tape Speed Switch to 7 -1 /2 ips. and playback
the 1,000 Hz, 7-1 /2 Test Tape. Connect a frequency
counter to LINE OUT and adjust VR2 20 kB until
the counter reads, 1, 000 Hz ± 0.8%. Next. set the
Tape Speed
Swit ch to 3-3/4 ips. and adjust VR I 50
kB until the frequency counter reads 500 Hz± 1.0%.
POWER SUPPLY 8i
SYSCON PCB
Fig. 7-10
--------------- SERVICE MANUAL GX-74 7dbx ---------------
31

Akai GX-747 dbx Specifications

General

Track System	4-track, 2-channel stereo
Reel Size	up to 10.5 inch reel
Type	Reel to Reel
Heads	2 x erase
Motor	1 x capstan, 2 x reel
Tape Speed	9.5 cm/s, 19 cm/s
Wow and Flutter	0.03% (19 cm/s)
Signal to Noise Ratio	65dB
Input	1 x line, 1 x microphone
Output	1 x line
Dimensions	440 x 480 x 260 mm