Sony MZ-R501 Service Manual page 28

MZ-R501/R501PC
Pin No. Pin Name
169 CLK SEL
170 OPEN CLOSE SW
171 GND SW
172 SET CODE0
173, 174 SET CODE1, 2
175 SET CODE3
176 MIFVDD1
177 MIFVSS1
178 (AOUT SEL)
179 SI0
180 SO0
181 SCK0
182 (XGUM ON)
183 BEEP
184 NC
185 VD SEL
186 (XMUTE)
187 LCD RST AUX
188, 189 NC
190 XPATCH
191 OPT DET
192 XJACK DET
193 (XMIC DET)
194, 195 PD S0, PD S1
196 MIFVDD2
197 to 199 MODE1 to 3
200, 201 HD CON 1, 2
202 REC WBL SW
203 XCS ADA
204 XPD ADA
205 XCS LCD
206 LCD STB
207 LCD RST
208 (REC LED)
209 (LD ON)
210 (TSB SLV CHK)
211, 212 (K-TAI-MON), (K-TAI-SW)
213 MCUVSS1
214 CAV CLV SW
215 XOPT CTL
216 (CS RTC)
217 OFTRK
218 MUTE
219 XCS NV
220 XRST MTR DRV
221 XRF RST
222 MCUVDD3
28
I/O
O System clock select signal output to the power control (IC901)
Open/close detection switch (S806) of the upper panel input terminal (A/D input)
I
"L": when upper panel close
O Control signal output to the ground (GND) changeover switch
O Input terminal for the set (fixed at "L" in this set)
O Input terminal for the set (open in this set)
O Input terminal for the set (fixed at "L" in this set)
— Power supply terminal (for the microcomputer I/F block) (+2.3 V)
— Ground terminal (for the microcomputer I/F block)
O HP/LINE changeover signal output Not used (open)
Serial data input from the nonvolatile memory (IC804) and liquid crystal display
I
element module
Serial data output to the nonvolatile memory (IC804), A/D converter (IC301) and
O
liquid crystal display element module
Serial clock signal output to the nonvolatile memory (IC804), A/D converter (IC301)
O
and liquid crystal display element module
Battery pack detection switch input terminal for the charge
I
"L": there is battery pack for the charge Not used (open)
O Beep sound control signal output Not used (open)
O Not used (open)
O VD power supply changeover signal output terminal Not used (open)
O Analog muting control signal output terminal "L": muting ON
O Reset control signal output terminal to the liquid crystal display element "L": reset
O Not used (open)
I Patch function detection input terminal "L": patch function Fixed at "L" in this set
I DIN plug detection signal input terminal
I LINE IN plug detection signal input terminal
I Microphone plug detection signal input terminal Not used (open)
O PD IC mode changeover signal output to the optical pick up
— Power supply terminal (for the microcomputer I/F block) (+2.3 V)
Power supply control signal output (for the over write head drive) to the over write
O
head drive (IC601)
O Over write head control signal output to the over write head drive (IC601)
O LPF changeover switch input terminal when REC/PB control Not used (open)
O Chip select signal output to A/D converter (IC301)
O Power supply control signal output for the drive to A/D converter (IC301)
O Chip select signal output to the liquid crystal display element
O Strobe signal output to the 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 Not used (open)
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 Not used (open)
I Off track signal input from RF amp (IC501)
O Analog muting control signal output "H": muting ON
O Chip select signal output to EEPROM (IC804)
O Reset control signal output to the motor driver (IC701)
O Reset control signal output to RF amp (IC501)
— Power supply terminal (for the microcomputer block) (+1.5 V)
Description
Not used (open)