– 25 –
1 PULSE I Pulse signal input
2 NO-USE – Not used (Fixed at “L”)
3 METER-L I Digital peak level meter signal input (L-ch)
4 METER-R I Digital peak level meter signal input (R-ch)
5 AD-GND – Ground for A/D converter
6 TEST I Not used (Fixed at “L”)
7 NO-USE – Not-used (Open)
8 NO-USE – Not-used (Fixed at “L”)
9 SYS-GND – Ground for system
10 OSC-OUT O System clock output (4 MHz)
11 OSC-IN I System clock input (4 MHz)
12 RESET I Reset signal input
13 AUB-IN I Audio bus input
14 AUB-OUT O Audio bus output
15 NO-USE – Not used (Fixed at “L”)
16 NO-USE – Not used (Fixed at “L”)
17 NO-USE – Not used (Fixed at “L”)
18 NO-USE – Not used (Fixed at “L”)
19 NO-USE – Not used (Fixed at “L”)
20 DOLBY C/B O DOLBY B/C select signal output “L”: DOLBY B, “H”: DOLBY C
21
DOLBY ON/OFF
O DOLBY on/off select signal output “L”: DOLBY off, “H”: DOLBY on
22
CDSYNC-LED
O Control output to CD SYNC LED (D851)
23 SEG17 O Segment signal output to fluorescent indicator tube (FLT851)
24 SEG16 O Segment signal output to fluorescent indicator tube (FLT851)
25 SEG15 O Segment signal output to fluorescent indicator tube (FLT851)
26 SEG14 O Segment signal output to fluorescent indicator tube (FLT851)
27 SEG13 O Segment signal output to fluorescent indicator tube (FLT851)
28 SEG12 O Segment signal output to fluorescent indicator tube (FLT851)
29 SEG11 O Segment signal output to fluorescent indicator tube (FLT851)
30 SEG10 O Segment signal output to fluorescent indicator tube (FLT851)
31 SEG9 O Segment signal output to fluorescent indicator tube (FLT851)
32 SEG8 O Segment signal output to fluorescent indicator tube (FLT851)
33 SEG7 O Segment signal output to fluorescent indicator tube (FLT851)
34 SEG6 O Segment signal output to fluorescent indicator tube (FLT851)
35 SEG5 O Segment signal output to fluorescent indicator tube (FLT851)
36 SEG4 O Segment signal output to fluorescent indicator tube (FLT851)
37 SEG3 O Segment signal output to fluorescent indicator tube (FLT851)
38 SEG2 O Segment signal output to fluorescent indicator tube (FLT851)
39 SEG1 O Segment signal output to fluorescent indicator tube (FLT851)
40 FL-GND I Ground for fluorescent indicator tube (Fixed at “L” (–20 V))
41 GRID 1 O Grid signal output to fluorescent indicator tube (FLT851)
42 GRID 2 O Grid signal output to fluorescent indicator tube (FLT851)
43 GRID 3 O Grid signal output to fluorescent indicator tube (FLT851)
44 GRID 4 O Grid signal output to fluorescent indicator tube (FLT851)
45 GRID 5 O Grid signal output to fluorescent indicator tube (FLT851)
5-3. IC PIN FUNCTION DESCRIPTION
• MAIN BOARD IC801 HD6433724E66F (SYSTEM CONTROL)
Pin No. Pin Name I/O Function
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