Akai GX-747 dbx Service Manual

2. COMPOSI TI ON OF VARIOUS P.C BOARDS
1) Pre Amp P.C Board Tl015A5050, Equalizer P.C Board Tl009D530A and Bias Adjust P.C Board Tl009D530B
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PRE-AMP PCB Tl015A5050 J.
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REPLACE S>.FET'Y CRIT IC AL COMPONENTS ONLY WIT H MAN UFA CTURER 'S
RECOMMENOE.0 P,i,.RTS
TR 1 -- -- --- --2SC3068
TR3,8,9- -- -- 2SC863 !E, Fl
TR4 ,26-- - ---ZSC l312 {G,H.I
TR ~,12,13,16 , 21 1o 23
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TR6------ 2S8836(8,Cl
TR 7, 23- - - - -2SCl 3! 2R (G,Hl
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LOCATION OF COMPONENTS
TR
TR I -- -- G2
TR3----E4
TR4----F2
TRS----E4
TR6 to 8--F'4
TR9----G4
TRI0,1 1--H0 2
TR12----C3
TR13,J4-- C2
TRl6--- A2
TRl9---C2
TR20---82
TR2J--- 82
TR22 , 23--B3
TR24,25 --E 2
TR
26,27- - F2
TRlb---G4
TR4o---F4
TR! Ob ,l! b- 04
TR l2b - - - C3
TR l3 b,1 4b-C4
TRl6b---A2
TR 26b,27'o -F4
IC
ICI----A3
TERMINAL
P4----B1
PS-- -- E4
PG, 7- - - 03
P8,9--- F3
PI0 -- -84
Pl l, t2 ---CI
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----------,----------------------------------SERVICEMANUALGX-747dbx------.------------------------------------
43

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