Sony Walkman MZ-R900 Servicehandleiding - Pagina 40

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Sony Walkman MZ-R900 Servicehandleiding
MZ-R900
Pin No.
Pin Name
204
XPD ADA
205
XCS LCD
206
LCD STB
207
LCD RST
208
REC LED
209
LD ON
210
TSB SLV CHK
211, 212
NC
213
MCUVSS1
214
CAV CLV SW
215
XOPT CTL
216
CS RTC
217
OFTRK
218
NC
219
XCS NV
XRST MTR
220
DRV
221
XRF RST
222
MCUVDD3
223
SPDL MON
224 to
NC
226
227
XHOLD SW
228
SYNC REC
229
NC
230
PROTECT
231
FLASHVDD
232
FLASHVSS
233
SLD MON
234
VLON
235
SLEEP
236
FFCLR
237
CHG GAIN
238
CHG
239, 240
NC
241
MIFVDD3
242
MIFVSS2
243
TEST2
244
NC
38
I/O
O
Power supply control signal output for the drive to A/D, D/A converter (IC301)
O
Chip select signal output to the liquid crystal display element
O
Strobe signal output to the liquid crystal display element
O
Reset control signal output to the liquid crystal display element Not used (open)
O
LED ON/OFF control signal output for REC display
O
ON/OFF control signal output terminal of the laser diode Not used (open)
I
TSB slave detection signal input terminal
I
Not used (open)
—
Ground terminal (for the microcomputer block)
O
CAV/CLV changeover control signal output Not used (open)
O
Power supply ON/OFF control signal output for DIN PD drive
O
Chip select signal output to the clock IC
I
Off track signal input from RF amp (IC501)
O
Analog muting control signal output "H": muting ON Not used (open)
O
Chip select signal output to EEPROM (IC804)
O
Reset control signal output to the motor driver (IC551)
O
Reset control signal output to RF amp (IC501)
—
Power supply terminal (for the microcomputer block) (+1.5V)
I
Spindle servo monitor signal input from the motor driver (IC551)
I
Not used (open)
I
HOLD switch (S801) input terminal "L": hold ON, "H": hold OFF
I
SYNCHRO REC switch (S802) input terminal "L": OFF, "H": ON
O
Not used (open)
Detection input terminal of the record check claw from the protect detection switch (S803)
I
"L": recording possible condition, "H": protect
—
Power supply terminal (for the internal FLASH ROM) (+2.4V)
—
Ground terminal (for the internal FLASH ROM)
I
Sled servo monitor signal input from the motor driver (IC551)
O
Power supply control signal output for the laser diode drive to the power control (IC901)
O
System sleep control signal output to the power control (IC901) "H": sleep ON
O
Input latch output for the start switching to the power control (IC901)
O
Charge gain control signal output to the power control (IC601)
O
Charge ON/OFF control signal output to the power control (IC601) "H": charge ON
O
Not used (open)
—
Power supply terminal (for the microcomputer I/F block) (+2.3V)
—
Ground terminal (for the microcomputer I/F block)
O
Input terminal for the main test (normally open)
—
Not used (open)
Description