Pioneer EFX-500, Service Manual

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EFX-500
18
A
B
C
D
1 2 3 4
1 2 3 4
2.5 SOUSA (2/2), MIDI, 7SEG and HP. BOARD ASSY
2/2
E G
G
MIDI BOARD ASSY
(DWX1911)
J201
SOUSA BOARD ASSY
(2/2)
(DWG1505)
E
2/2
E
1/2
A
1/3
E
1/2
20
20
TP- HL6
V : 5V/div. H : 0.2mS/div.
GND
JA602-4pin(MIDI IN), JA601-5pin(MIDI OUT)
V : 2V/div. H : 20mS/div.
19
19
MIDI IN
MIDI OUT
GND
GND
19
: AUDIO SIGNAL (HEADPHONE)
SIGNAL ROUTE
Voltage [ V ]
No.
1
2
3
4
5
6
7 0
0
0
0
0
4.97
0
Voltage [ V ]
No.
8
9
10
11
12
13
14
4.74
4.74
4.74
4.97
0
4.97
4.97
IC603 (BU4066BCF)
Voltage [ V ]
No.
1
2
3
4
5
6
7 0
4.97
4.77
0
0
4.95
0
Voltage [ V ]
No.
8
9
10
11
12
13
14
4.95
0
4.94
0
4.94
0
4.97
IC601 (TC74HCU04AF)
Voltage [ V ]
No.
1
2
3 0
0
0
Voltage [ V ]
No.
4
5
6 4.97
0
4.97
IC602 (PC900V)
Voltage [ V ]
No.
1
2
3
4 -4.5 - 4.5
-0.2 - 0.2
-0.2 - 0.2
-11.8
Voltage [ V ]
No.
5
6
7
8 -0.2 - 0.2
-0.2 - 0.2
-4.5 - 4.5
11.9
IC703 (NJM4556AD)
(ANALOG SW)
(INVERTER)
(PHOTO CAPRER)
MIDI SW LEVEL
H - SLEW
L - OUTPUT
STBY
STBY
STBY
EARTH METAL FITTING
CABLE HOLDER