Harman Kardon HK-3470 Schematic

harman/kardon

hk3370/3470

STEREO RECEIVER

PRELIMINARY

SERVICE MANUAL

ESD WARNING……………………..…….…….2

LEAKAGE TESTING………………..…….…....3

BASIC SPECIFICATIONS hk3370………..…..4
BASIC SPECIFICATIONS hk3470………..…..5
FRONT PANEL CONTROLS hk3370.….…….6
REAR PANEL CONNECTIONS hk3370…..…8
REMOTE CONTROL FUNCTIONS HK3370..10
FRONT PANEL CONTROLS hk3470.……….12
REAR PANEL CONNECTIONS hk3470…..…15
REMOTE CONTROL FUNCTIONS HK3470..17

TROUBLESHOOTING GUIDE…...….….....…19

ALIGNMENT PROCEDURES…………….…..20
WAVEFORMS……………………………..…..23

harman/kardon, Inc.

250 Crossways Park Dr.

Woodbury, New York 11797

CONTENTS

BLOCK DIAGRAM…………..………………28
EXPLODED VIEW HK3370………….……..29
EXPLODED VIEW HK3470…….……...…..30
DISASSEMBLY PROCEDURES…………..31
MECHANICAL PARTS LIST HK3370.……39
ELECTRICAL PARTS LIST HK3370.….…40
MECHANICAL PARTS LIST HK3370.……57
ELECTRICAL PARTS LIST HK3370.….…58
IC DESCRIPTIONS………………….……..75
PCB DRAWINGS……………………...……86
SCHEMATICS………………….……………92
WIRING DIAGRAM………………………...103
PACKAGE………………….………………..104

SCHEMATIC DIAGRAM

78

95

MAIN

HK3470

SCHEMATIC DIAGRAM

98

AMP/TONE/ETC.

POWER AMP

TONE

POWER LED

VR/LED

POWER SW

SCHEMATIC DIAGRAM

80

99

FRONT

HK3370 / HK3470

SCHEMATIC DIAGRAM

102

TUNER/VR/HP

HK 3370 / HK 3470

TUNER

HEAD PHONE

12. WIRING DIAGRAM

82

103

HK 3370 / HK 3470

30

20

3. Circuit Description

HK3370 / HK3470

8

75

CPU(IC401) :uPD780204GF

1. Pin Configuration

2. Pin Description

HK3370 / HK3470

9

76

uPD780204GF QFP Type

Pin No. Pin Name I/O ACTIVE

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

PORT NAME REMARK

Pin No. Pin Name I/O ACTIVE

HK3370 / HK3470

10

77

47 P127 - - Not used
48 P127 - - Not used
49 P125 - - Not used
50 P124 O H/L 78211 DATA
51 P123 - - Not used
52 P122 - - Not used
53 P121 - - Not used
54 P120 - - Not used
55 P117 O H VMAX VMAx on/off
56 P116 O H SPK1_RLY Speaker1 relay on/off
57 P115 O H SPK2_RLY Speaker2 relay on/off
58 P114 O H SPK1_LED Speaker1 led on/off
59 P113 O H SPK2_LED Speaker2 led on/off
60 P112 O H SPK12_LED Speaker1/2 led on/off
61 P111 - ­62 P110 - ­63 P107 O H VR_LED Volume led on/off
64 P106 I H/L OPT_STEP L:E.U. , H:USA
65 P105 I H/L OPT_3400/3700 L:3400, H:3370
66 FIP33 O H S18 FIP segment output
67 FIP32 O H S17 FIP segment output
68 FIP31 O H S16 FIP segment output
69 FIP30 O H S15 FIP segment output
70 FIP29 O H S14 FIP segment output
71 FIP28 O H S13 FIP segment output
72 FIP27 O H S12 FIP segment output
73 FIP26 O H S11 FIP segment output
74 FIP25 O H S10 FIP segment output
75 FIP24 O H S9 FIP segment output
76 FIP23 O H S8 FIP segment output
77 FIP22 O H S7 FIP segment output
78 FIP21 O H S6 FIP segment output
79 Vload - - Vload FIP DRIVER VOLTAGE
80 FIP20 O H S5 FIP segment output
81 FIP19 O H S4 FIP segment output
82 FIP18 O H S3 FIP segment output
83 FIP17 O H S2 FIP segment output
84 FIP16 O H S1 FIP segment output
85 FIP15 O H G16 FIP grid output
86 FIP14 O H G15 FIP grid output
87 FIP13 O H G14 FIP grid output
88 FIP12 O H G13 FIP grid output
89 FIP11 O H G12 FIP grid output
90 FIP10 O H G11 FIP grid output
91 FIP9 O H G10 FIP grid output
92 FIP8 O H G9 FIP grid output
93 FIP7 O H G8 FIP grid output
94 FIP6 O H G7 FIP grid output
95 FIP5 O H G6 FIP grid output

PORT NAME REMARK

IC 701 : BA6208

HK3370 / HK3470

64

78

IC 302 : HI-M602HO

HK3370 / HK3470

65

79

IC 303 : KIA7042AP

KIA

70

42AP

816

IC 111 : KA78XX

HK3370 / HK3470

66

80

IC 112 : KA79XX

GND

REFERENCE

I1 I2

VOLTAGE

R1

R2

Output

Q2

Rsc

Out

In

Input

+

Q1

-

PROTECTION

CIRCUITRY

IC 603 : LA3401

HK3370 / HK3470

67

81

IC 102 : LC7821

HK3370 / HK3470

68

82

IC 602 : LC7218JM

IC 108 : LTV817B

HK3370 / HK3470

69

83

IC 304 : BR24C04

IC 604 : TDA7479D

HK3370 / HK3470

70

84

IC 601 : LA1266 AM/FM IF

Front End : FE601 (FTA3-509HA) U.S.A. Version

HK3370 / HK3470

63

85

Front End : FE601 (FTA4-460H) E.U. Version