Tech Tip Hktt2003-01; Tech Tips - Harman Kardon hk3370 Service Manual

hk3370/hk3470
harman/kardon
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
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
AVR10
AVR7000
AVR7200
AVR7300
AVR8000
AVR100/200
AVR300
AVR500
AVR110/210/310/510
AVR120/220/320/520
AVR125/225
AVR325/525
AVR130/230/330
AVR135/235/335
AVR430/630
AVR435/635
DPR1001
DPR1005/2005
HK3370/3470
HK3375/3475
HK3250
* 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)
AVR10
DPR1001
DPR1005
DPR2005
HK3370/3470/3375/3475
HK3250
Designator Location
C712
Front PCB
D709
C730 Front PCB
C106 Front PCB
C657 DSP PCB
C726 Front PCB
C412 Front PCB
C906 Front PCB
C906 Front PCB
C216 Front PCB
C734,C885 Front PCB
C106 Front PCB
BAT1 Front PCB
BAT1 Front PCB
C657 DSP PCB
C557 DSP PCB
BC601 Main PCB
Processor
C437
PCB
C301 Front PCB
C301 Front PCB
C712
Front PCB
D709

TECH TIPS

Description
0.047 Farad 5.5v capacitor
and 1N4148 diode
0.047 Farad 5.5v capacitor
0.047 Farad 5.5v capacitor
0.047 Farad 5.5v capacitor
0.047 Farad 5.5v capacitor
0.047 Farad 5.5v capacitor
0.1Farad 5.5v capacitor
0.1Farad 5.5v capacitor
0.047 Farad 5.5v capacitor
two 0.1F capacitors in parallel
0.047 Farad 5.5v capacitor
3.6v Battery
3.6v Battery
0.047 Farad 5.5v capacitor
0.047 Farad 5.5v capacitor
0.1Farad 5.5v capacitor
0.047 Farad 5.5v capacitor
0.1Farad 5.5v capacitor
0.1Farad 5.5v capacitor
0.047 Farad 5.5v capacitor
and 1N4148 diode
20
harman/kardon
TIP# HKTT2003-01 Rev5
Part number
#3439247315
#2058322101
# P10790-ND or
# J3432147324X
# P10790-ND
# H01-CEZXA0479MN-5
# 55230310NR or
# P10790-ND
# CEGT-B473J-0J0
# J4433210421X
or # P10791-ND
# J4433210421X
or # P10791-ND
# P10790-ND
# BCESOHD104
# P10790-ND
# HABGP40BVH3A3H
# HGP15BNH3A3H
# CEZXA0479MN-5
# H03-CEZXA0479MN-0
# CEGT-B104J-0J0
# CEZXA0479MN-5
# CEGT-B104J-0J0
# CEGT-B104J-0J0
#3439247315
#2058322101