Sony MZ-R900 Service Manual - Page 40

Sony MZ-R900 Manual

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MZ-R900 Pin No. Pin Name I/O Description 204 XPD ADA O Power supply control signal output for the drive to A/D, D/A converter (IC301) 205 XCS LCD O Chip select signal output to the liquid crystal display element 206 LCD STB O Strobe signal output to the liquid crystal display element 207 LCD RST O Reset control signal output to the liquid crystal display element Not used (open) 208 REC LED O LED ON/OFF control signal output for REC display 209 LD ON O ON/OFF control signal output terminal of the laser diode Not used (open) 210 TSB SLV CHK I TSB slave detection signal input terminal 211, 212 NC I Not used (open) 213 MCUVSS1 - Ground terminal (for the microcomputer block) 214 CAV CLV SW O CAV/CLV changeover control signal output Not used (open) 215 XOPT CTL O Power supply ON/OFF control signal output for DIN PD drive 216 CS RTC O Chip select signal output to the clock IC 217 OFTRK I Off track signal input from RF amp (IC501) 218 NC O Analog muting control signal output "H": muting ON Not used (open) 219 XCS NV O Chip select signal output to EEPROM (IC804) 220 XRST MTR DRV O Reset control signal output to the motor driver (IC551) 221 XRF RST O Reset control signal output to RF amp (IC501) 222 MCUVDD3 - Power supply terminal (for the microcomputer block) (+1.5V) 223 SPDL MON I Spindle servo monitor signal input from the motor driver (IC551) 224 to 226 NC I Not used (open) 227 XHOLD SW I HOLD switch (S801) input terminal "L": hold ON, "H": hold OFF 228 SYNC REC I SYNCHRO REC switch (S802) input terminal "L": OFF, "H": ON 229 NC 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) (+2.4V) 232 FLASHVSS - Ground terminal (for the internal FLASH ROM) 233 SLD MON I Sled servo monitor signal input from the motor driver (IC551) 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 output 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 to the power control (IC601) 238 CHG O Charge ON/OFF control signal output to the power control (IC601) "H": charge ON 239, 240 NC O Not used (open) 241 MIFVDD3 - Power supply terminal (for the microcomputer I/F block) (+2.3V) 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) 38

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38
MZ-R900
Pin No.
Pin Name
I/O
Description
204
XPD ADA
O
Power supply control signal output for the drive to A/D, D/A converter (IC301)
205
XCS LCD
O
Chip select signal output to the liquid crystal display element
206
LCD STB
O
Strobe signal output to the liquid crystal display element
207
LCD RST
O
Reset control signal output to the liquid crystal display element
Not used (open)
208
REC LED
O
LED ON/OFF control signal output for REC display
209
LD ON
O
ON/OFF control signal output terminal of the laser diode
Not used (open)
210
TSB SLV CHK
I
TSB slave detection signal input terminal
211, 212
NC
I
Not used (open)
213
MCUVSS1
—
Ground terminal (for the microcomputer block)
214
CAV CLV SW
O
CAV/CLV changeover control signal output
Not used (open)
215
XOPT CTL
O
Power supply ON/OFF control signal output for DIN PD drive
216
CS RTC
O
Chip select signal output to the clock IC
217
OFTRK
I
Off track signal input from RF amp (IC501)
218
NC
O
Analog muting control signal output
“H”: muting ON
Not used (open)
219
XCS NV
O
Chip select signal output to EEPROM (IC804)
220
XRST MTR
DRV
O
Reset control signal output to the motor driver (IC551)
221
XRF RST
O
Reset control signal output to RF amp (IC501)
222
MCUVDD3
—
Power supply terminal (for the microcomputer block) (+1.5V)
223
SPDL MON
I
Spindle servo monitor signal input from the motor driver (IC551)
224 to
226
NC
I
Not used (open)
227
XHOLD SW
I
HOLD switch (S801) input terminal
“L”: hold ON, “H”: hold OFF
228
SYNC REC
I
SYNCHRO REC switch (S802) input terminal
“L”: OFF, “H”: ON
229
NC
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) (+2.4V)
232
FLASHVSS
—
Ground terminal (for the internal FLASH ROM)
233
SLD MON
I
Sled servo monitor signal input from the motor driver (IC551)
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 output 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 to the power control (IC601)
238
CHG
O
Charge ON/OFF control signal output to the power control (IC601)
“H”: charge ON
239, 240
NC
O
Not used (open)
241
MIFVDD3
—
Power supply terminal (for the microcomputer I/F block) (+2.3V)
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)