Microcomputer's Terminal Description - Kenwood kac-X1R Service Manual

PREAMPLIFIER UNIT (X08-4310-10)
Ref. No. Application / Function
IC1 (1/2) Signal amplification
IC1 (2/2) Signal amplification
IC2 Frequency fixed LPF
IC3 Signal amplification
IC4 Frequency variable LPF
IC5,6 (1/2) Band-cut filter
IC6 (2/2) Reverse circuit
IC7 Frequency variable HPF
IC8 (1/2) Signal amplification
IC11 FL driver

MICROCOMPUTER'S TERMINAL DESCRIPTION

MICROCOMPUTER: 78F0533GK011A (X09-856: IC1)
Pin No. Pin Name I/O
1 P_CON I Clears the stop mode by turning the P-CON ON
2 D_CURENT I Detects the D-class over current
3 NC O Not used
4 PON_ILLUM O LOGO LED+B SW
5 FAN1 O FAN rotation control
6 RESET I Reset
7 D_POWER O D-class amplifier power supply control
8 POWER_ON_1 O Amplifier power supply control
9 FLASH_W I Used when writing in the flash
10,11 NC O Not used
12 REGC -
13 VSS -
14 EVSS -
15 VDD -
16 EVDD -
17,18 NC O Not used
19 NC O
20 5V_SW O SW5V ON: L
21 NC O Not used
22 PON_FL O FL power supply (Grid and Filament) control
23~33 NC O Not used
34 ROTARY_CW I Encoder pulse input
COMPONENTS DESCRIPTION
Mixes Lch and Rch to make Mono signal.
Buffer to send the signal that comes through LPF and Bass Boost to the Line Out.
LPF fixed at 400Hz.
Amplifies the signal that comes through SensVol and outputs it with low impedance.
LPF with variable frequency between 40~200Hz.
Attenuates the frequency in the specific range between 40~100Hz.
Changes the phase by 180 degrees.
Attenuates the frequency in the range of 15~60Hz that is lower than the specific frequency.
Amplifies the signal component to reduce noises in the subsequent BRF stages.
Communicate with the µ-com, generates the data for FL display and reads in KEY.
Application
KAC-PS1D/X1R
Operation / Condition / Compatibility
Truth Value
Processing Operation Description
Table
L: Clear the stop mode
Enters into the protection operations.
Output L fixed
H: ON, L: OFF, Initial condition "L"
q
H: Rotation, L: Stop, Initial condition "L"
H: D-class ON, L: D-class OFF
H: Amplifier power supply ON, Initial condition "L"
Output L fixed
Output L fixed
L: SW5V ON, Initial condition "L"
Output L fixed
H: ON, L: OFF
Output L fixed
Detects pulse width
5