AIWA LCX-337EZ
Service Manual

Pin No. 36 37 38 39, 40 41 42

Pin Name TES HFL SLOF CV�, CV+ RFSM RFS�

I/O O O I I O I

Description Pin from which TES signal is output to DSP. �High Frequency Level� is used to judge whether the main beam position is on top of bit or on top of mirror. Sled servo off control input pin. CLV error signal input pin from DSP. RF output pin. RF gain setting and EFM signal 3T compensation constant setting pin together with RFSM pin.

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SLC SLI DGND FSC TBC NC DEF CLK CL DAT CE DRF FSS VCC2 REFI VR LF2 PH1 BH1 LDD LDS VCC1

O I � O I � O I I I I O I � � O I I I O I �

�Slice Level Control� is the output pin which controls the RF signal data slice level by DSP. Input pin which control the data slice level by the DSP. Digital system GND. Output pin to which external focus search smoothing capacitor is connected. �Tracking Balance Control� EF balance variable range setting pin. No connection. Disc defect detector output pin. Reference clock input pin. 4.23 MHz of the DSP is input. Microprocessor command clock input pin. Microprocessor command data input pin. Microprocessor command chip enable input pin. �Detect RF� RF level detector output. �Focus Search Select� focus search mode (± search/+ search) select pin. Servo system and digital system Vcc pin. Pin to which external bypass capacitor for reference voltage is connected. Reference voltage output pin. Disc defect detector time constant setting pin. Pin to which external capacitor for RF signal peak holding is connected. Pin to which external capacitor for RF signal bottom holding is connected. APC circuit output pin. APC circuit input pin. RF system Vcc pin.

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