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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
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Before returning the unit to the user, perform the following safety checks :
1. Inspect all lead dress to make certain that
leads are not pinched or that hardware is not
lodged between the chassis and other metal
partsin the unit.
2. Be sure that any protective devices such as
nonmetallic control knobs, insulating fish-
papers, cabinet backs, adjustment and
compartment covers or shields, isolation
resistor-capacity networks, mechanical
insulators, etc. Which were removed for the
servicing are properly re-installed.
3. Be sure that no shock hazard exists ; check for leakage
current using Simpson Model 229 Leakage Tester, standard
equipment item No. 21641, RCA Model WT540A or use
alternate method as follows : Plug the power cord directly
Into a 120 volt AC receptacle (do not use an Isolation
Transformer for this test). Using two clip leads, connect a
1500 ohms, 10watt Resistor paralleled by a 0.15uF capacitor, in serieswith all exposed metal cabinet parts and a known earth ground, such
as a water pipe or conduit. Use a VTVM or VOM with 1000 ohms per volt, or higher sensitivity to measure the AC voltage drop across the
resistor. (See diagram) Move the resistor connection to each exposed metal part having a return path to the chassis (antenna, metal,
cabinet,screwheads,knobs and control shafts, escutcheon, etc.) and measurethe AC voltage drop across the resistor. (This test shouldbe
performed with the 0.35 volt RMS or more is excessive and indicates a potential shockhazard which must be corrected before returning the
unit to the owner.
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1. Test Equipment Required.
2. Alignment and Test Points
3. AM IF and RF Alingment
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4. FM IF Alignment
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5. MPX Alignment, SM Alignment
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Pin No. Pin Name I/O ACTIVE
PORT NAME REMARK
96 FIP4 O H G5 FIP grid output
97 FIP3 O H G4 FIP grid output
98 FIP3 O H G3 FIP grid output
99 FIP1 O H G2 FIP grid output
100 FIP0 O H G1 FIP grid output
3. Timing Chart (IF Count)
1
2
3
4
5
6
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MANUAL TUNING UP/DOWN
MANUAL TUNING UP/DOWN KEY OFF
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- POWER ON
- AUTO TUNING UP/DOWN
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4. Pheriperal IC Operation
)
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2) PLL IC. (LC7218)
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<1> CHASSIS-TOP(44) REMOVAL.
Remove 9 screws(A,K) and then remove the Chassis-top(44).
<2> FRONT PANEL ASS'Y(AA) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step <1>.
2. Disconnect the connector(CN 301, Card-cable) on the Front P. C. Board(d) from connector(CN 115) on the
Main P. C. Board (i).
3. Disconnect the lead wire(CW 302, 5P) on the Front P. C. Board(d) from connector(CN 702) on the Volume
Volume P. C. Board (b).
4. Disconnect the connector(CN 801, 2P) on the Standby P. C. Board(g) from connector(CN 102) on the
Main P. C. Board (i).
5. Remove 1 screw(I) of Chassis-panel(37) and then lead wire(H 801, 1P) on the Phones P. C. Board(e).
6. Disconnect the lead wire(CW 301, 7p) on the Front P. C. Board(d) from connector(CN 113) on the Main
P. C. Board(i).
7. Disconnect the lead wire(CW 801, 3P) on the Phones P. C. Board(e) from connector(CN 401) on the Amp
P. C. Board(h).
8. Remove 1 screw(I) of Chassis-panel(37) and then lead wire(H 501, 1P) on the Tone P. C. Board (c).
9. Disconnect the lead wire(CW 701, 10P) on the Volume P. C. Board(b) from connector (CN 109) on the Main
P. C. Board(i).
10. Remove 9 screws(H, I) and then remove the Front Panel ASS'Y(AA).
<3> FRONT P. C. BOARD(d) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Remove the Front-panel ASS'Y(AA), referring to the previous step<2>.
3. Disconnect the lead wire(CW 302, 5P) from connector(CN 702) on the Volume P. C. Board(b).
4. Disconnect the connector(CN 302) from lead wire(CW 801,5P) on the Power P.C.Board (f).
5. Remove 15 screws(J) and then remove the Front P.C.Board(d).
<4> VOLUME P.C.BOARD(b) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Remove the Front-panel ASS'Y(AA), referring to the previous step<2>.
3. Disconnect the connector(CN 702) from lead wire(CW 302, 5P) on the Front P. C. Board(d).
4. Disconnect the connector(CN 703) from lead wire(CW 802, 2P) on the Volume2 P. C. Board(a).
5. Disconnect the connector(CN 701) from lead wire(CW 501, 10P) on the Tone P. C. Board(c).
6. Disconnect the lead wire(CW 701,10P) from connector(CN 109) on the Main P. C. Board(i).
7. Full out the Volume Knob(1).
8. Remove 1 hexagon nut(3), 1 washer(4) and then remove the Volume P. C. Board(b).
<5> VOLUME2 P. C. BOARD(a) ASS'Y(AD) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Remove the Front-panel ASS'Y(AA), referring to the previous step<2>.
3. Disconnect the lead wire(CW 802, 2P) from connector(CN 703) on the Volume P.C.Board(b).
4. Full out the Volume Knob(1).
<6> VOLUME2 P. C. BOARD(a) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Remove the Front-panel ASS'Y(AA), referring to the previous step<2>.
3. Remove the Volume P. C. Board(b) ASS'Y(AD), referring to the previous step<5>.
4. Full out the Volume2 P. C. Board(a).
<7> TONE P. C. BOARD(c) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Remove the Front-panel ASS'Y(AA), referring to the previous step<2>.
3. Disconnect the lead wire(CW 501, 10P) from connector(CN 701) on the Volume P. C. Board(b).
4. Pull out the Balance-knob(5).
5. Remove 4 screws(J) and then remove the Tone P. C. Board ASS'Y(AC).
6. Remove 4 hexagon nut(3) and then remove the Shield-balance(12).
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<8> PHONES P. C. BOARD(e) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Remove the Front-panel ASS'Y(AA), referring to the previous step<2>.
3. Disconnect the lead wire(CW 801, 3P) from connector(CN 401) on the Amp P. C. Board(h).
4. Remove 2 screws(E) and then remove the Phones P. C. Board(e).
<9> POWER P. C. BOARD(f) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Remove the Front-panel ASS'Y(AA), referring to the previous step<2>.
3. Disconnect the lead wire(CW 801, 5P) from connector(CN 302) on the Front P. C. Board(d).
4. Remove 2 screws(J) and then remove the Power P. C. Board(f).
<10> STANDBY P. C. BOARD(g) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Remove the Front-panel ASS'Y(AA), referring to the previous step<2>.
3. Remove 2 screws(J) and then remove the Standby P. C. Board(g).
<11> TUNER P. C. BOARD(j) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Remove 21 screws(G,K) and then remove the Chassis-back(41).
3. Pull out the Tuner P. C. Board(j).
<12> RADIATOR ASS'Y(AB) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Disconnect the connector(CN 401) from lead wire(CW 801, 3P) on the Phones P. C. Board(e).
3. Disconnect the lead wire(CW 403, 4P) from connector(CN 111, CN 112) on the Main P. C. Board(i).
4. Disconnect the lead wire(CW 402, 10P) from connector(CN 107) on the Main P. C. Board(i).
5. Disconnect the lead wire(CW 401, 4P) from connector(CN 108) on the Main P. C. Board(i).
6. Remove 7 screws(I) and then pull out the Radiator Ass'Y(AB).
<13> AMP P. C. BOARD(h) REMOVAL.
1. Remove the Chassis-top(44), referring th the previous step<1>.
2. Remove the Radiator Ass'Y(AB), referring to the Previous step<12>.
3. Disconnect the connector(CN 402) from lead wire(posistor, 2P) on the Radiator-main (21).
4. Remove 4 screws(D) and then remove the Amp P. C. Board(h).
<14> POWER TRANS(38) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Disconnect the lead wire(2P) from connector(CN 103) on the Main P. C. Board(i).
3. Disconnect the lead wire(3P) from connector(CN 104) on the Main P. C. Board(i).
4. Disconnect the lead wire(6P) from connector(CN 105) on the Main P. C. Board(i).
5. Disconnect the lead wire(3P) from connector(CN 106) on the Main P. C. Board(i).
6. Remove 4 screws(B) and then remove the Power trans(38).
<15> MAIN P. C. BOARD(i) REMOVAL.
1. Remove the Chassis-top(44), referring to the previous step<1>.
2. Remove the Tuner P. C. Board(j), referring to the previous step<11>.
3. Disconnect the connector(CN 109) from lead wire(CW 701, 10P) on the Volume P. C. Board(b).
4. Disconnect the connector(CN 108) from lead wire(CW 401, 4P) on the Amp P. C. Board(h).
5. Disconnect the connector(CN 115) from connector(CN 301, card cable) on the Front P. C. Board(d).
6. Disconnect the connector(CN 107) from lead wire(CW 402, 10P) on the Amp P. C. Board(h).
7. Disconnect the connector(CN 106) from lead wire(3P) on the Power-trans(38).
8. Disconnect the connector(CN 105) from lead wire(6P) on the Power-trans(38).
9. Disconnect the connector(CN 113) from lead wire(CW 301, 7P) on the Front P. C. Board(d).
10. Disconnect the connector(CN 104) from lead wire(3P) on the Power-trans(38).
11. Disconnect the connector(CN 111, CN 112) from lead wire(CW 403, 4P) on the Amp P. C. Board(h).
12. Disconnect the connector(CN 102) from lead wire(CN 801, 2P) on the Standby P. C. Board(g).
13. Disconnect the connector(CN 103) from lead wire(2P) on the Power-trans(38).
14. Disconnect the connector(CN 101) from Ac cord(40).
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1SS133 (40V 0.11A) DO-40 T
MTZ15C 14.35-15.09 DO40 T
MTZ18C 17.42-18.33 DO40 T
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3.3Mohm 1/2W ERC12UGK335V
PRO1 1W 10ohm 5% R-SHAPE T
PRO1 1W 4.7ohm J R-SHAPE T
PRO1 1W 4.7ohm J R-SHAPE T
PRO1 1W 4.7ohm J R-SHAPE T
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0.1F J 5.5V SCDA5R5104A T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
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PRO1 1W 47Ohm 5% R-SHAPE T
PRO1 1W 47Ohm 5% R-SHAPE T
PRO1 1W 47Ohm 5% R-SHAPE T
PRO1 1W 47Ohm 5% R-SHAPE T
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1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
MTZJ5.1B 4.94-5.20 DO34 T
MTZJ6.2B 5.96-6.27 DO34 T
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PRO1 1W 82ohm 5% R-SHAPE T
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Ref. No. Part No. Description
BLOCK SUB
ZBNG-00700-4ZL BOND-ADHESIVE #575
ZBNG-01300-5ZL LOCKER-SCREW #1401B
# ZGSI-01000-9PN GREASE-SILICON G-746
ZSBR-00010-060 SOLDER-BAR SN60
# ZSWR-00010-F60 SOLDER-WIRE D1.0 SN60
BLOCK MECHA
ANTL-00060-E50 ANTENNA-LOOP AAN-007 19.5uH 7T 125x93
ANTT-00054-075 ANTENNA-T TYPE 75ohm W/TER(Y)-1200m/m
BAMN-00010-150 BATTERY MANGANESE R03(AAAM) 1.5V 10.5x44.5
FGFB-O2002-831 FUSE GLASS 2A 125V 51S
FGFB-O3151-831 FUSE GLASS 315mA 125V 5x20 U/C SB
FGFB-O8002-331 FUSE GLASS 8A 125V 5x20 U/C SB
KDAC-0575D-H00 CORD-AC KKP-10W WITH CORE
LLA3-20401-E10 CARD CABLE 1.25x20Px360xCx(0.1x0.8)
MAAF-03600-022 WINDOW-FL HK3470RDS ACRYL T=3.0 (L
MAAF-16130-014 LENS-VOLUME HK3370 PMMA(IF-850)
MAAF-16990-014 LENS-POWER HK3370 ACRYL
MAAF-17040-014 FILTER-FL HK3370 PVC T0.5
MAAF-17070-004 SHEET-WINDOW PE(DRAFTING FILM)
MEAC-05060-002 RADIATOR-MAIN A6063 T-5+AL
MJAF-03580-012 KNOB-FUNCTION HK3370 ABS
MJAF-06570-011 PANEL-FRONT HK3370 ABS
MJAF-08870-013 KNOB-CHOICE HK3370 ABS
MJAF-08880-013 DECO-CHOICE HK3370 ABS
MJAF-15640-014 FOOT(A) AVR200
MJAF-16050-024 KNOB-STANDBY HK3470RDS ABS-720
MJAF-16070-024 KNOB-BALANCE HK3470RDS ABS-720
MJAF-16100-024 KNOB-VOLUME HK3470RDS ABS-720
MJAF-16140-004 SUPPORT-PCB ABS-720
MJAF-16980-014 KNOB-POWER HK3370 ABS
MJAF-17030-004 GUIDE-LED ABS
MJAG-00280-003 CORD-BUSH NIFCO
MJAG-04540-004 CABLE-TIE-L80 *
MLAG-13850-014 BADGE-H/K HK3370 AL
MMAC-12060-004 TERMINAL-GND
MMAC-15650-004 SCREW-RADIATOR
MMAC-16400-004 SCREW-T/P-TOOTH 3X10 BLACK
MMAC-17070-004 JACK-CONNECT
MMSC-00900-004 AIR-STAPLER
MMTC-00751-003 SCREW-TAPPING BHW T2T 3x8 FE-ZY
MPAC-04812-002 CHASSIS-BOTTOM US COATING T1.2
MPAC-04950-012 CHASSIS-TOP AVR200 SECC(T0.6) + P
MPAC-05040-022 CHASSIS-BACK HK3470 SECC T0.8
MPAC-16220-004 BRACKET-RADIATOR(S) US COATING T1.0
MPAC-16880-004 SHIELD-BALANCE ET-HD T0.5
MRAG-13040-004 CUSHION-A FELT 437x10x0.5 S
MRAG-13050-004 CUSHION-A FELT 250x10x0.5 S
MRAG-13250-004 CUSHION-A EVA T=5.0
MRAG-13930-004 TRANSISTOR-MICA MICA
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EB 0.33uF J 50V 7.2x9.5 T
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1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
MTZ15C 14.35-15.09 DO40 T
MTZ18C 17.42-18.33 DO40 T
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3.3Mohm 1/2W ERC12UGK335V
PRO1 1W 10ohm 5% R-SHAPE T
PRO1 1W 4.7ohm J R-SHAPE T
PRO1 1W 4.7ohm J R-SHAPE T
PRO1 1W 4.7ohm J R-SHAPE T
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0.1F J 5.5V SCDA5R5104A T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
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1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
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47ohm 1W 5% ERG(X)1SJ470E
47ohm 1W 5% ERG(X)1SJ470E
47ohm 1W 5% ERG(X)1SJ470E
47ohm 1W 5% ERG(X)1SJ470E
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1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
1SS133 (40V 0.11A) DO-40 T
MTZJ5.1B 4.94-5.20 DO34 T
MTZJ6.2B 5.96-6.27 DO34 T
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PRO1 1W 82ohm 5% R-SHAPE T
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CPU(IC401) :uPD780204GF
1. Pin Configuration
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2. Pin Description
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
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Pin No. Pin Name I/O ACTIVE
PORT NAME REMARK
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
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IC 701 : BA6208
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IC 302 : HI-M602HO
IC 303 : KIA7042AP
KIA
70
42AP
816
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IC 111 : KA78XX
IC 112 : KA79XX
GND
REFEREN CE
I1 I2
VOLTAG E
R1
R2
O u t
Output
+
Q1
-
Q2
PRO TECTIO N
CIRCUIT RY
Rsc
In
Input
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IC 603 : LA3401
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IC 102 : LC7821
IC 602 : LC7218JM
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IC 108 : LTV817B
IC 304 : BR24C04
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IC 604 : TDA7479D
IC 601 : LA1266 AM/FM IF
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Front End : FE601 (FTA3-509HA) U.S.A. Version
Front End : FE601 (FTA4-460H) E.U. Version
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