Sony car audio cdx 2250 3500 service manual

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Ð 19 Ð SECTION 4 DIAGRAMS 4-1. IC PIN DESCRIPTION ¥ IC801 µPD17705GC-537-3B9 (SYSTEM CONTROL) Pin No. Pin Name I/O Pin Description 1 SIRCS I SIRCS input (A/D) 2 IN-SW I CD mechanism position detection 3 D-SW I CD mechanism position detection 4 SELF-SW I CD mechanism position detection 5 L-SW I LIMIT switch 6 LM-EJ O Loading motor control (Eject direction) 7 LM-LOD O Loading motor control (Loading direction) 8 AMP/ANT-ON O Power control for amplifier. 9 MONO O Force MONO output 10 SD I SD signal input 11 BAND-SW I Initialize switch input terminal 12 AREA1-SW I Initialize switch input terminal 13 AREA2-SW I Initialize switch input terminal 14, 15 RE1, 2 I Rotary encoder input 1, 2 16 SEEK O SEEK output 17 CD-ON I/O Servo drive power 18 FM-ON I/O FM select output 19 TU-ON I/O AM select output 20 NC Ñ Not used. 21 GND3 Ñ Ground 22 KEYIN3 I Not used (Connect to ground) 23, 24 KEYIN2, 1 I A/D key input 2, 1 25 ROT-IN I Rotary commander input 26 S-METER I FM and AM common signal meter A/D conversion input 27 TEST-SW I TEST mode select input 28 AM-IFC I AM center frequency input 29 FM-IFC I FM center frequency input 30 VDD2 Ñ Power supply (+5 V) 31 VCOH-FM I Local oscillation frequency input (FM) 32 VCOL-AM I Local oscillation frequency input (AM) 33 GND2 Ñ Ground 34 NC Ñ Not used. 35 EO1-PDOUT O Error out output 36 TESTO Ñ Connect to ground 37 AM-ON(TU-ON) O AM power output (AM select) 38 FM-ON(FM/AM) O FM power output (FM select) 39 LCL/DX O LOCAL/DX select (ÒHÓ : LOCAL, ÒLÓ : DX) 40 BEEP O BEEP output 41 ACC-IN I Accessory input 42 SCOR I SUBQ data read request 43 MUTE O System mute output 44 AMP-MUTE O Power amplifier mute output 45 TEL-MUTE O Telephone mute output 46 NC Ñ Fixed at ÒHÓ in this set. 47 VOL-CE O Electric volume chip select 48 VOL-CLK O Electric volume serial clock 49 VOL-DATA O Electric volume serial data 50 EMPHO O De-emphasis control output 51 PW-ON O System power control 52 MD-ON O Loading motor power 53 CD-ON O Servo drive power

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Ð 20 Ð Pin No. Pin Name I/O Pin Description 54 ILL-ON O Illumination output 55 C.ALARM I Caution alarm select input (Used/Not used) 56 NC I Not used (Connect to ground) 57 NC Ñ Fixed at ÒHÓ in this set. 58 LCD-CE O LCD drive chip select output 59 EZ-SEL I SHIFT + input 60 SENS I Information input from servo IC. 61 FOK I Focus OK input 62 LD-ON O Laser diode control 63 NC Ñ Not used. (Connect to ground) 64 [IN] ST/MONO I/O Used for both STEREO indicator display input and force MONO output. (FM) [OUT] MONO 65 LCD-CKO O LCD driver serial clock output 66 LCD-So O LCD driver serial data output 67 INH O INHbit output 68 SQ-CKo O Q data read serial clock output 69 CD-RST O Servo IC/DAC reset output 70 SQ-SI I Q data input 71 CD-SO O Serial data output to servo IC. 72 CD-LAT O Data latch output to servo IC. 73 CD-CKO O Serial clock output to servo IC. 74 VREF Ñ Not used. 75 GND1 Ñ Ground 76 X-OUT Ñ Crystal oscillator connection (4.5 MHz) 77 X-IN I Crystal oscillator connection (4.5 MHz) 78 BU-IN I Back-up detection 79 VDD1 Ñ Power supply (+5 V) 80 RESET I RESET input