Sony D-NF400 - ATRAC Walkman Portable CD Player, Service Manual

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D-NF400/NF401
MAIN BOARD IC3 TC9327AF-04CDW (DTS MICRO CONTROLLER)
Pin No. Pin Name I/O Description
1 to 4 COM1 to COM4 O Common drive signal output to the liquid crystal display Not used
5 to 20 S1 to S16 O Segment drive signal output to the liquid crystal display Not used
21 MODEL1 I Key setting selection terminal Fixed at “L” in this set
22 RE2 O AM mode DC/DC converter frequency shift signal output terminal Not used
23 RE1 O AM mode DC/DC converter on/off control signal output terminal
24 MODEL2 O Not used
25 DESTVSS_O O Destination setting terminal
26 AO_O O AO signal output to the LCD unit
27 CS_O O Chip select signal output to the LCD unit
28 LCD-REQ_I I Request signal input from the system controller
29 XLID-OPEN_I I CD lid switch signal input terminal
30 EEP DO/DI_IO I/O Serial data input/output terminal Not used
31 EEP-SK_O O Serial data transfer clock signal output terminal Not used
32 EEP-CS_I O Chip select signal output to the EEPROM
33 XL/O_I I Line out jack detection terminal Not used
34 RM-KEY_I I Not used
35 DEST I Destination setting terminal
36 AD-KEY3_I I Not used
37 KEY2 I Key input terminal
38 TU-ON_O O Tuner on request signal output to the system controller
39 CD-ON_I I CD on request signal input from the system controller
40 TU-AVLS_O O Not used
41 TV-L-ON_O O Not used
42 AD-KEY1_I I Key input terminal
43 BATT_I I Battery voltage detection input terminal
44 HIDC_I I High DC voltage monitor input terminal
45 AD-DC_REF I Reference voltage (+1.5V) input terminal (for DC)
46 CDU-SDI_I I Serial data input from the system controller and EEPROM
47 CDU-SDO_O O Serial data output to the system controller and EEPROM
48 CDU-SCK_I I Serial data transfer clock signal input from the system controller
49 TU-BEEP_O O Beep sound control signal output to the electrical volume
50 VOL-PWM_O O Volume control PWM signal output for the electrical volume
51 TU-HOLD_I I HOLD switch signal input terminal
52 BAND-CTL2_O O Tuner band selection signal output terminal “H”: AM
53 BAND-CTL1_O O Tuner band selection signal output terminal “H”: FM
54 ACK-CD_O O CD acknowledge signal output to the system controller
55
MONO/LOCAL-
CTR_O
O Local/DX or Mono/Stereo selectionl signal output terminal
56 S/W IDEN_I O Line/headphone out selection signal output terminal Not used
57 XTU-TEST_I I Test mode setting input terminal “L”: test mode, Normally: “H”
58 XTU-BASS1_O O Bass on/off control signal output to the electrical volume
59 XTU-BASS2_O O Bass line/headphone out selection signal output to the electrical volume
60 +B ON/OFF_O O Tuner system power supply on/off control signal output “H”: tuner power on
61 IF-REQ_O O Intermediate frequency request signal output terminal
62 TU-MUTE_O O Muting on/off control signal output to the electrical volume
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