MZ-R501/R501PC

Pin No.

Pin Name

I/O

Description

 

 

 

 

 

223

SPDL MON

I

Spindle servo monitor signal input

 

 

 

 

 

 

224 to 226

(XAVLS), (SOUND 1, 2)

I

Not used (open)

 

 

 

 

 

 

227

XHOLD SW

I

HOLD switch (SW801) input terminal

“L”: hold ON, “H”: hold OFF

 

 

 

 

 

228

(SYCN REC)

I

SYNCHRO REC switch input terminal

“L”: OFF, “H”: ON Not used (open)

 

 

 

 

 

229

(SYNC LEVEL)

O

Not used (open)

 

 

 

 

 

230

PROTECT

I

Detection input terminal of the record check claw from the protect detection switch

(S803) “L”: recording possible condition, “H”: protect

 

 

 

 

 

 

 

231

FLASHVDD

Power supply terminal (for the internal FLASH ROM) (+2.4 V)

 

 

 

 

232

FLASHVSS

Ground terminal (for the internal FLASH ROM)

 

 

 

 

 

233

SLD 1 MON

I

Sled servo monitor signal input

 

 

 

 

 

234

VLON

O

Power supply control signal output for the laser diode drive to the power

control (IC901)

 

 

 

 

 

 

 

 

 

235

SLEEP

O

System sleep control signal coutput to the power control (IC901) “H”: sleep ON

 

 

 

 

236

FFCLR

O

Input latch output for the start switching to the power control (IC901)

 

 

 

 

237

(CHG GAIN)

O

Charge gain control signal output Not used (open)

 

 

 

 

 

238

(CHG)

O

Charge ON/OFF control signal output

“H”: charge ON Not used (open)

 

 

 

 

 

239

(TUN REG ON)

O

Not used (open)

 

 

 

 

 

240

XHP STBY

O

Headphone standby signal output to the headphone amp (IC302)

 

 

 

 

241

MIFVDD3

Power supply terminal (for the microcomputer I/F block) (+2.3 V)

 

 

 

 

242

MIFVSS2

Ground terminal (for the microcomputer I/F block)

 

 

 

 

243

(TEST2)

O

Input terminal for the main test (normally open)

 

 

 

 

 

244

NC

Not used (open)

 

 

 

 

 

 

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Image 29
Sony R501PC service manual Xhold SW, Sycn REC, Sync Level, Flashvdd, Flashvss, Vlon, Sleep, Ffclr, XHP Stby, MIFVSS2, TEST2