harman/kardon
TECH TIPS
Troubleshooting tips and solutions to common service problems
For models:
AVR7000/7200/7300/8000
AVR100/200/300/500
AVR110/210/310/510
AVR120/220/320/520
AVR125/225/325/525
AVR130/230/330/430/630
AVR135/235/335/435/635
AVR10
DPR1001
DPR1005
DPR2005
HK3370/3470/3375/3475
HK3250
TIP# HKTT2003-01 Rev5
Subject:
Backup Memory on AVR/DPR/HK series receivers
In the event of the complaint: “the receiver is losing its memory (any programmed system settings)
when the unit is turned off, or after the unit is unplugged (briefly*)”:
Check and replace:
Model Designator
Location
Description
Part
number
AVR10
C712
D709
Front PCB
0.047 Farad 5.5v capacitor
and 1N4148 diode
#3439247315
#2058322101
AVR7000
C730
Front PCB
0.047 Farad 5.5v capacitor
# P10790-ND or
# J3432147324X
AVR7200
C106
Front PCB
0.047 Farad 5.5v capacitor
# P10790-ND
AVR7300
C657
DSP PCB
0.047 Farad 5.5v capacitor
# H01-CEZXA0479MN-5
AVR8000
C726
Front PCB
0.047 Farad 5.5v capacitor
# 55230310NR or
# P10790-ND
AVR100/200
C412
Front PCB
0.047 Farad 5.5v capacitor
# CEGT-B473J-0J0
AVR300
C906
Front PCB
0.1Farad 5.5v capacitor
# J4433210421X
or # P10791-ND
AVR500
C906
Front PCB
0.1Farad 5.5v capacitor
# J4433210421X
or # P10791-ND
AVR110/210/310/510
AVR120/220/320/520
C216
Front PCB
0.047 Farad 5.5v capacitor
# P10790-ND
AVR125/225
C734,C885
Front PCB
two 0.1F capacitors in parallel
# BCESOHD104
AVR325/525
C106
Front PCB
0.047 Farad 5.5v capacitor
# P10790-ND
AVR130/230/330
BAT1
Front PCB
3.6v Battery
# HABGP40BVH3A3H
AVR135/235/335
BAT1
Front PCB
3.6v Battery
# HGP15BNH3A3H
AVR430/630
C657
DSP PCB
0.047 Farad 5.5v capacitor
# CEZXA0479MN-5
AVR435/635
C557
DSP PCB
0.047 Farad 5.5v capacitor
# H03-CEZXA0479MN-0
DPR1001
BC601
Main PCB
0.1Farad 5.5v capacitor
# CEGT-B104J-0J0
DPR1005/2005 C437
Processor
PCB
0.047 Farad 5.5v capacitor
# CEZXA0479MN-5
HK3370/3470
C301
Front PCB
0.1Farad 5.5v capacitor
# CEGT-B104J-0J0
HK3375/3475
C301
Front PCB
0.1Farad 5.5v capacitor
# CEGT-B104J-0J0
HK3250
C712
D709
Front PCB
0.047 Farad 5.5v capacitor
and 1N4148 diode
#3439247315
#2058322101
* After approximately two weeks of being disconnected from AC supply, even a normally functioning receiver may
lose any programmed settings and switch to default settings. (Four weeks for the DPR1005 & 2005)
hk3370/hk3470
harman/kardon
20
Summary of Contents for HK 3370
Page 24: ...4 BLOCK DIAGRAM HK3370 HK3470 24...
Page 29: ...29...
Page 30: ...30...
Page 31: ...31...
Page 32: ...32...
Page 33: ...33...
Page 34: ...34...
Page 71: ...3 Circuit Description CPU IC401 uPD780204GF 1 Pin Configuration hk3370 hk3470 harman kardon 71...
Page 75: ...1 1 1 1 1 1 MANUAL TUNING UP DOWN MANUAL TUNING UP DOWN KEY OFF 1 2 3 1 4 5 6 75...
Page 76: ...1 2 3 1 4 5 6 1 2 3 1 3 1 1 2 2 3 1 4 5 6 AUTO TUNING UP DOWN POWER ON 76...
Page 77: ...4 Pheriperal IC Operation 1 FUNCTION IC LC7821 1 3 77...
Page 82: ...HI M602H0 REMOTE RECEIVER hk3370 hk3470 harman kardon 82...
Page 84: ...hk3370 hk3470 harman kardon 84...
Page 85: ...IC 603 LA3401 hk3370 hk3470 harman kardon 85...
Page 86: ...hk3370 hk3470 harman kardon 86...
Page 87: ...hk3370 hk3470 harman kardon 87...
Page 88: ...hk3370 hk3470 harman kardon 88...
Page 89: ...hk3370 hk3470 harman kardon 89...
Page 90: ...hk3370 hk3470 harman kardon 90...
Page 91: ...hk3370 hk3470 harman kardon 91...
Page 103: ...hk3370 hk3470 harman kardon 103...
Page 104: ...HK3370 HK3470 P C BOARD MAIN MAIN 104...
Page 105: ...HK 3370 P C BOARD AMP AMP 105...
Page 106: ...P C BOARD AMP HK 3470 AMP 106...
Page 107: ...P C BOARD FRONT FRONT HK3370 HK3470 107...
Page 108: ...P C BOARD TUNER VR HP COIL TUNER VR HP COIL HK3370 HK3470 108...
Page 109: ...HK3370 HK3470 P C BOARD TONE POWER SW LED TONE POWER SW LED 109...
Page 110: ...HK 3370 SCHEMATIC DIAGRAM MAIN 110...
Page 111: ...SCHEMATIC DIAGRAM MAIN HK 3370...
Page 112: ...HK 3370...
Page 113: ...SCHEMATIC DIAGRAM MAIN HK3470 113...
Page 114: ...SCHEMATIC DIAGRAM MAIN HK3470...
Page 115: ...HK3470...
Page 117: ...SCHEMATIC DIAGRAM FRONT HK3370 HK3470 117...
Page 118: ...SCHEMATIC DIAGRAM FRONT HK3370 HK3470...
Page 119: ...HK3370 HK3470...
Page 120: ...SCHEMATIC DIAGRAM TUNER VR HP HK 3370 HK 3470 HEAD PHONE TUNER 120...
Page 121: ...12 WIRING DIAGRAM HK 3370 HK 3470 121...
Page 122: ...HK 3370 122...
Page 123: ...HK 3470 123...