Microcomputer's Terminal Description; System Μ-Com: Ic1 On X34- (Electric Unit) - Kenwood KDC-1032 Service Manual

KDC-1032/132/132CR
KDC-133/233/234SGY
Ref. No. Application / Function
CD SIGNAL PROCESSOR
IC2
built-in µ-COM
IC3 4ch BTL DRIVER
IC4 LPF (LOW PASS FILTER)
Q1 APC (AUTOMATIC POWER CONTROL)
Q2 DIGITAL +5V SW
Q3 Q4 SW
Q4 ANALOG +8V SW
Q5, 6 CURRENT AMP

MICROCOMPUTER'S TERMINAL DESCRIPTION

SYSTEM µ-COM: IC1 on X34- (ELECTRIC UNIT)
Pin No. Pin Name
1 TDF DET
2 8EJE SW
3 NC
4 AVSS
5 L-RST
6 L-CE
7 AVREF1
8 NC
9 IC10-DATA
10 IC10-CLK
11 L-DATAL
12 L-DATAL
13 L-CLK
14 R-DATA
15 R-QUAL
16~18 NC
19 FUNC OUT
4
COMPONENTS DESCRIPTION
Focusing, tracking, sled and spindle servo processing.
Automatic adjustment (focusing, tracking, gain, offset and balance) operations.
Digital signal processing (DSP, PLL, sub-codes, CIRC error correction, audio data
interpolation processing) operations, and microcomputer function.
Focusing coil, tracking coil, spindle motor and sled motor driver, disc loading and
eject operation.
2nd low pass filter for audio signals
LD power control
ON when P. ON signal goes "Lo"
ON when P. ON signal goes "Lo" (SW+5V is ON)
ON when P. ON signal goes "Lo" (Q3 is ON)
Current driver
I/O Application
I Panel detection
I
- Not used (output L)
-
O LCD driver reset
O LCD driver select
-
- Not used (connected to pin 9)
I/O E2PROM communication data for IC10
O E2PROM communication clock for IC10
I Communication data from LCD driver
O Communication data to LCD driver
O Communication clock to LCD driver
I Communication data from RDS
I Communication qualification from RDS
- Not used (output L)
O Function output result
Operation / Condition
Truth value table Processing Operation Description
H: Panel detached, L: Panel attached
H: Eject completed
Always L-output for models that do not support 8cm CD
H: When panel detached, L: Reset
Normally H, L when Power OFF
H: Select (Panel communication)
L-output when panel detached
H for no communication
H for no communication
H for no communication, L when panel detached
Pull Down at over X34
L-output when panel detached
L-output when panel detached
L-output for models without RDS
L-output for models without RDS
H: OK, L: NG