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 ;
nice completed SERVICE MANUAL as the description THANK YOU !!!-
;
Hard to find service manual describing the PLL circuit of the AKAI AP-306.
Thanks to have it available.
;
Gut, sehr gut! It helps me much! I couldn't find this schema nowhere. Good quality
42WP37
SU-Board Block Diagram
SU
Scan Out (up) Board Vf
30 31 32 44 45 46 81 82 83 84 87 92 93 94 95
IC6401
A
TO SC41
FSI FCL FCLK PRO VF5V SU41
31 11 32 12 33 13 34 14 35 15 36 16
PDP SCAN DRIVER HV64 HV63 HV62
86 76 75 74
SU1
A40 B40 A39 B39
FSI FCL FCLK PRO VF5V
FSI FCLK FCL PRO
85
89 90 91
48 PIN OUTPUT
HV18 HV17
16 15
To 1st 80pins of
A17 B17
Vf5
37 17 88
A16 B16
SCAN ELECTRODES
Vf
50 30
Vf
34 35 41 42 78 79 97 98
FSO1
Vfo
Q6401
Vf
30 31 32 44 45 46 81 82 83 84 87 92 93 94 95
A2 B2 A1 B1
B
TO SC42
Vf
SU42
71 51
IC6402
Vf PDP SCAN DRIVER FS01 HV64 HV63 HV62
76 75 74
80 60 85 86 89 81 61
VSCN
82 62 83 63
VSCN
FCLK FCL
64 PIN OUTPUT HV03 1 HV02 100 HV01
99
Vfo
90 70
Vfo
PRO
90
SU2
A40 B40 A39 B39
FS02 Vf5
91
88
34 35 41 42 78 79 97 98
C
Vf
Vfo
A25 B25 A24 B24
To 2nd 80pins of SCAN ELECTRODES
30 31 32 44 45 46 81 82 83 84 87 92 93 94 95
IC6403
PDP SCAN DRIVER FS02 FCLK FCL
89 A2 B2
SELECTOR
85 86
HV64 HV63 HV62
76 75 74
A1 B1
64 PIN OUTPUT HV03 1 HV02 100 HV01
99
PRO FS03
90 91
Vf5
88
SU3
A40 B40
D
34 35 41 42 78 79 97 98
A39 B39
Vfo To 3rd 80pins of
A33 B33 A32 B32
Vf
SCAN ELECTRODES
30 31 32 44 45 46 81 82 83 84 87 92 93 94 95
IC6404
PDP SCAN DRIVER FS03 FCLK FCL PRO HV64 HV63 LATCH HV62
76 75 74 A2 B2 A1 B1
85 86 89 90 91
64 PIN OUTPUT HV03 1 HV02 100 HV01
99
E
Vf5
88
SHIFT RESISTOR Vfo
34 35 41 42 78 79 97 98
SU-Board Block Diagram
SU-Board Block Diagram
1
2
3
4
5
6
7
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