JVC KD-LX333R Service Manual page 21

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3.Pin function
Pin No. Symbol
1 Vcc
2 FNI
3 FPI
4 TPI
5 TNI
6 MDI
7 LDO
8 SEL
9 TEBC
10 TEN
11 TEO
TE
L 13942296513
12 RFDC
13 GVSW
14 VRO
15 FEO
16 FEN
17 RFRP
18 RFRPIN
19 RFGO
20 RFGC
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21 AGCIN
.
22 RFO
23 RFN
24 GND
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I/O
- 3.3V Power supply pin
I Main-beam amp input pin
I Main-beam amp input pin
I Sub-beam amp input pin
I Sub-beam input pin
I Monitor photo diode amp input pin
O Laser diode amp output pin
I APC circuit ON/OFF control signal,laser diode (LDO) control signal input or
bottom/peak detection frequency change pin.
SEL
GND OFF
HIZ
Vcc
I Tracking error balance adjustment signal pin
Adjusts TE signal balance by eliminating carrier component from
PWM signal(3-state output, PWM carrier = 88.2kHz) output from
TC9490F/FA TEBC pin using RC-LPF and inputting DC.
TEBC input voltage:GND~Vcc
I Tracking error signal generation amp negative-phase input pin
O Tracking error signal generation amp output pin.
Combining TEO signal and RFRP signal with TC9490F/FA configures
tracking search system.
O RF signal peak detection output pin
I AGC/FE/TE amp gain change pin
GVSW
GND
HIZ
Vcc
O Reference voltage (VRO) output pin *VRO = 1/2 Vcc when Vcc = 3.3V
Focus error signal generation amp output pin
O
Focus error signal generation amp negative-phase input pin
I
Signal amp output pin for track count
O
Combining RFRP signal TEO signal with TC9490F/FA configures tracking
search system.
Signal generation amp input pin for track count
I
RF signal amplitude adjustment amp output pin
O
RF amplitude adjustment control signal input pin
I
Adjusts RF signal amplitude by eliminating carrier component from PWM
signal (3-state output, PWM carrier = 88.2kHz) output from TC9490F/FA
RFGC pin using RC-LPF and inputting DC.
x ao *RFGC input voltage : GND-Vcc u163
y
RF signal amplitude adjustment amp input pin
I
i
O RF signal generation amp output pin
I RF signal generation amp input pin
- GND pin
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2 9
8
Function
APC
LDO
circuit
Connected to Vcc
through 1k resistor
Control signal output
ON
Control signal output
ON
Q Q
3 6 7 1 3 1 5
Mode
CD-RW
CD-DA
CD-DA
co
.
KD-LX333R
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9
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