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UD-301/351
CIRCUIT DESCRIPTION
Function
IN/OUT
OUT
OUT
Pin Name
PD7
PFO
PK1
[ Unused
Unused
Unused
| S10
P7B : Ol
(For DECK B)
45
$11
OUT
| P8B:
<4
(For DECK B)
46
$12
OUT
| P9B:
<4
(For DECK B)
47
$13
OUT
| P17B:
DUBB,
HIGH
48
$14
OUT
| P16B:
DUBB, NOR
49
$15
OUT
| P12B: B
(DOLBY NR TYPE indication)
50
$16
OUT
P13B: C (ALso used as key-scan output)
(DOLBY NR TYPE indication)
51
$17
OUT
P11B:
DOLBY
NR (Also used as key-scan output)
52
$18
OUT
P3B:
B (Also used as key-scan output)
(Deck B indication)
53
$19
OUT
| P1B:
A
(Also used as key-scan output
(Deck A indication)
54
$20
OUT
| P4B:
<4 (Also used as key-scan output) (For Deck A)
55
$21
f OUT
| P5B: ® (For Deck A)
56
$22
OUT
| P10B:
(Endless indication)
OUT
P2B: TAPE =
(Permanetly lit)
OUT
| P14B: CCRS
OUT
| P6B:
@
(For Deck B)
OUT
| Unused
OUT
OUT
| Unused
OUT
| Unused
T
Unused
T
Unused
OUT
Unused
Ts
Unused
Unused
Positive power supply terminal (+5 V)
NC
Specification of playback equalizer. ''H'' = 70 p
Unused
Specification of BIAS
Control of BIAS oscilation. ''H'' = ON (Oscillation)
Chip enable terminal
Unused
Test mode 2 (For PCB jig). '''L'' = ON.
16
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