Harman Kardon HK 3370, Service Manual

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2. Pin Description
Pin No. Pin Name I/O ACTIVE PORT NAME REMARK
1 Vdd - H +5V System power supply
2 P37 I H KR4 Key read 4
3 P36 I H KR3 Key read 3
4 P35 I H KR2 Key read 2
5 P34 I H KR1 Key read 1
6 P33 - - - Not used
7 P32 - - - Not used
8 P31 O H/L PWR_LED(RED) L:AMBER L:GREEN H:RED
9 P30 O H/L PWR_LED(GRN) L:STBY H:OPER L:PROT
10 RESET I L System reset Low reset
11 X2 - - OSC Main system osc.
12 X1 I - OSC -
13 Vpp - - Conneced to Vss
14 XT2 - - - Not used
15 P04/XT1 I H/L OPT_RDS Rds on/off
16 Vdd - H +5V System power supply
17 P27 - - Not used
18 P26 - - Not used
19 P25 I L PWR DOWN Detect power off
20 P24 O H PWR_RLY Power Relay on/off
21 P23 O H VR_UP Volume up
22 P22 O H VR_DOWN Volume Down
23 P21 I L PROTECT Detect protection
24 P20 O H PWR_MUTE Power Mute
25 AVss - L GND Analog ground
26 P17 O H PRE_MUTE Pre mute
27 P16 O H TUNER_MUTE Tuner mute
28 P15 I H/L IF_IN IF conter in
29 P15 O H PLL CE
30 P13 O H PLL CLOCK
31 P12 O H/L PLL DATA
32 P11 I L TUNED Tuned in on : L
33 P10 I L STEREO Stereo in on : L
34 Avdd - H +5V Analog power supply
35 Avref - L GND
36 P03 - - Not used
37 INTP2 I L RDS CLK Rds clock in
38 P01 I H RDS DATA Rds data in
39 P00 I L REMOCON IN Remocon data in
40 Vss - L GND Ground
41 P74 O H/L 78211 CLK
42 P73 O H/L 78211 CE
43 P72 - - Not used
44 P71 - - Not used
45 P70 - - Not used
46 Vdd - H +5V
uPD780204GF QFP Type
hk3370/hk3470 harman/kardon
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