Kenwood A-58 Service Manual page 14

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CIRCUIT DESCRIPTION
3-4. Pin function
Function
Detection of protection. ("H": Detected, "L" : Not detected)
| Analog signal input directly from the filter circuit. (Pin 2~4 ; 16kHz, 6.3kHz, 2.5kHz)
Analog signal input directly from the filter circuit. (Pin 5~8 : 1.0kHz, 400Hz, 160Hz, 63Hz)
Visual selector (NJM2279D) control signal output. ("H" : OFF, "L" : ON)
Selector (TC9163N, TC9164N) control DATA signal output.
Selector (TC9163N, TC9164N) control CLOCK signal output.
| O | Selector (TC9163N : SEL2, TC9164N : SEL1) control STROBE signal output.
Selector (TC9164N : SEL3) control STROBE signal output.
14 ST2 0
Ea aaa ee Center/Surround speaker relay control signal output. ("H" : ON, "L" : OFF)
| 46 | FRONTSP. | 0 | Front speaker relay control signal output. ("H" : ON, "L" : OFF)
| 17. | HEADPHONE ——s«| | Headphone relay control signal output. ("H" : ON, "L" : OFF)
| ig [csvorstB | o | Center/Surround speaker volume IC (TC9213P) control STROBE signal output.
| 19 [cysvoL.paTA sid Center/Surround speaker volume IC (TC9213P) control DATA signal output.
| 20 |csvo..cK |o| Center/Surround speaker volume IC (TC9213P) control CLOCK signal output.
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| 22 | MvoL.cL_ | O_| Main speaker volume IC (LC7538JM) control CLOCK signal output.
| 23 | Mvol.Di | O_| Main speaker volume IC (LC7538JM) control DATA signal output,
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(Dolby Pro Logic surround matrix decoder : LA2785, Dolby surround passive decoder : LV1010N)
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(Dolby Pro Logic surround matrix decoder : LA2785, Dolby surround passive decoder : LV1010N)
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(Dolby Pro Logic surround matrix decoder : LA2785, Dolby surround passive decoder : LV1010N)
( ON)
FRONT-MUTE | O | Signals to control muting circuit of front speaker. ("H" : OFF, 'L":
OMNI-MUTE lo | Signals to control muting circuit of OMNI speaker. ("H" : OFF, "L" : ON)
CE Detection of backup. ("H" : Others, "L" : Backup mode)
30, 31 SEL.B, SEL.A | 1 | Rotary encoder phase signal (Pin 30 : Phase B, Pin 31 : Phase A) input for input selector.
32 REMOCON ell Remote control signal input.
33, 34 | VOL.B, VOL.A rae Rotary encoder phase signal (Pin 33 : Phase B, Pin 34 : Phase A) input for volume.
35 ESET I Detection of reset signal. ("H" : Others, "L" : Reset)
System serial BUSY signal Input/Output.
VO | System serial DATA signal Input/Output.
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O | System clock output (8.4MHz)
GND
Power relay control signal output. ("H" : ON, "L" : OFF)
LED driver (M66310P) control DATA signal output.
LED driver (M66310P) control SHIFT CLOCK signal output.
FL tube grid 01G~10G (Pin 65~56) drive signal output. ("H": ON, "L" : OFF)
55~79 EGO1~SEG25 FL tube segment P01~P25 (Pin 48~41, 39~37, 35~33, 30, 29, 26~18) drive signal output.
Key scan 7~0 signal output. ("H" : ON, "L" : OFF)
80~87 SEG26/KS7~SEG33/KSO | O
FL tube segment P26~P33 (Pin 17, 16, 14~12, 9~7) drive signal output. ("H" : ON, "L" : OFF)
| 88 | SEG3a/KSm sO FL tube segment P34 (Pin 6) drive signal output. Key scan INI signal output. ("H": ON, "L" : OFF)
g990 [NC | ~_ | Notused.
91 Vcc I Power input for p-com. (+5V410%)
Not used,
95~97 KR2~KRO Key return signal input. ("H" : ON, "L" : OFF)
Pull down power input. (-30V)
A/D converter GND input. (Vss)
A/D converter reference voltage input. (+5V)
Name
PROTECT
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