Harman Kardon AVR 135 (serv.man3) Service Manual ▷ View online
TROUBLESHOOTING GUIDE
45
TROUBLESHOOTING GUIDE
SYMPTOM
CAUSE
SOLUTION
Unit does not function when Main
• No AC Power
• Make certain AC power cord is plugged into
Power Switch is pushed
a live outlet
• Check to see whether outlet is switch-controlled
Display lights, but no sound
• Intermittent input connections
• Make certain that all input and speaker connections
or picture
are secure
• Mute is on
• Press Mute Button
• Volume control is down
• Turn up volume control
Unit turns on, but front panel
• Display brightness is turned off
• Follow the instructions in the Display Brightness section
display does not light up
on page 28 so that the display is set to
VFD FULL
No sound from any speaker;
• Amplifier is in protection mode
• Check speaker wire connections for shorts at receiver and
light around power switch is red
due to possible short
speaker ends
• Amplifier is in protection mode
• Contact your local Harman Kardon service center
due to internal problems
No sound from surround or
• Incorrect surround mode
• Select a mode other than Stereo
center speakers
• Input is monaural
• There is no surround information from mono sources
• Incorrect configuration
• Check speaker mode configuration
• Stereo or Mono program material
• The surround decoder may not create center- or rear-channel
information from nonencoded programs
Unit does not respond to
• Weak batteries in remote
• Change remote batteries
remote commands
• Wrong device selected
• Press the AVR selector
• Remote sensor is obscured
• Make certain front panel sensor is visible to remote
or connect remote sensor
Intermittent buzzing in tuner
• Local interference
• Move unit or antenna away from computers, fluorescent
lights, motors or other electrical appliances
Letters flash in the channel indicator
• Digital audio feed paused
• Resume play for DVD
display and digital audio stops
• Check that Digital Input is selected
In addition to the items shown above, additional information on troubleshooting possible problems with your AVR 135, or installation-related issues, may be found in the list of
"Frequently Asked Questions" which is located in the Product Support section of our Web site at www.harmankardon.com.
"Frequently Asked Questions" which is located in the Product Support section of our Web site at www.harmankardon.com.
41
Processor Reset
In the rare case where the unit’s operation or the dis-
plays seem abnormal, the cause may involve the erratic
operation of the system’s memory or microprocessor.
plays seem abnormal, the cause may involve the erratic
operation of the system’s memory or microprocessor.
To correct this problem, first unplug the unit from the
AC wall outlet and wait at least three minutes. After the
pause, reconnect the AC power cord and check the
unit’s operation. If the system still malfunctions, a sys-
tem reset may clear the problem.
AC wall outlet and wait at least three minutes. After the
pause, reconnect the AC power cord and check the
unit’s operation. If the system still malfunctions, a sys-
tem reset may clear the problem.
To clear the AVR 135’s entire system memory includ-
ing tuner presets, output level settings, delay times and
speaker configuration data, press and hold the Tone
Mode Button
ing tuner presets, output level settings, delay times and
speaker configuration data, press and hold the Tone
Mode Button
5 button for three seconds. The unit
will turn on automatically.
NOTE: Resetting the processor will erase any configu-
ration settings you have made for speakers, output
levels, surround modes, digital input assignments as
well as the tuner presets. The unit will be returned to
the factory presets, and all settings for these items
must be reentered.
ration settings you have made for speakers, output
levels, surround modes, digital input assignments as
well as the tuner presets. The unit will be returned to
the factory presets, and all settings for these items
must be reentered.
If the system is still operating incorrectly, there may
have been an electronic discharge or severe AC line
interference that has corrupted the memory or
microprocessor.
have been an electronic discharge or severe AC line
interference that has corrupted the memory or
microprocessor.
If these steps do not solve the problem, consult an
authorized Harman Kardon service center.
authorized Harman Kardon service center.
AMPLIFIER SECTION BIAS ADJUSTMENT
CUP11651Y (BIAS PCB)
Measurement condition
. No input signal or volume position is minimum.
Standard value.
. Ideal current = 48mA (
±
5%)
. Ideal DC Voltage = 25.92mV (
±
5%)
DC VOLTMETER..............Connect to CN81,CN82,CN83,CN84,CN85,CN86,CN87
NO.
Channel
Adjust for
Adjustment
1
Front Left
25.92mV (±5%)
VR83
CN82
VR86
2
Front Right
25.92mV (±5%)
25.92mV (±5%)
25.92mV (±5%)
25.92mV (±5%)
VR84
CN86
VR82
3
Center
VR85
4
Surround Left
VR86
CN81
VR87
5
Surround Right
VR87
VR81
CN87
6
7
Surround Back Left
Surround Back Right
25.92mV (±5%)
25.92mV (±5%)
VR82
VR81(235&335 ONLY)
......
......
0
1
0
0-QdlnuhmfsgdSnoB`ahmds
QdlnudsgdRbqdvr
4
3
5
CHR@RRDLAKX
}
02
00
0/
6
8
02
2
01
7
6
4
5
7
8
3
2
1
0
QdlnudsgdRbqdvr
1-QdlnuhmfsgdEqnmsO`mdk
0
8
}
5
2
7
3
6
QdlnudsgdRbqdvr
3-QdlnuhmfsgdL`hmOBA
0
1
4
}
0
7
06
18
}
0
15
QdlnudsgdRbqdvr
03
02
01
00
11
0/
8
7
6
12
14 15
3
5
4
2
1
0 04 05
2-QdlnuhmfsgdQd`qO`mdk
1/
07 08
10
@UQ024.12/
13
16 17
2
4
6
7
8
02
03
04
8
00
0/
12
13
12
13
14
15
16
1/
10
17
18
25
2/
21
23
24
11
R1
R1
R2
R1
R0
R1
R3
R3
R0/
R4
R4
R6
R0
R8
R4
R4
R4
R3
R3
R3
R3
R5
w1
R00
R0/
R7
R02
R01
30
08
35
34
0
1
3
5
06
05
22
R1
R1
R03
R1
R0
07
20
R3
26,8
0
BNO00637D
28
HMOTSOBA@RR&X
STMDQLNCTKD'DTQ(
UHCDNOBA@RR&X
30
3/
CHFHS@KHMOTS.NTSOTSOBA
28,0
3/,2
3/,3
3/,4
3/,3
3/,4
BMUL8/03LR06/K
BNO00636D
3/,0
SQ@MROBA
SQ@MROBA
HMOTSOBA
UHCDNOBA
0
0
0
0
0
0
0
0
JMNA+ONVDQ
AQ@BJDS+RHCD
JMNA+ETMBSHNM
JMNA+ETMBSHNM
BG@RRHR+ANSSNL
QTAADQ+BTRGHNM
QTAADQ+BTRGHNM
B@AHMDS+SNO
AQ@BJDS+EHO
AQ@BJDS+OBA
OK@SD+RGHDKC
OK@SD+RGHDKC
HMCHB@SNQ+ONVDQ
AQ@BJDS+OBA
RGDDS+UNKTLD
AQ@BJDS+OBA
AQ@BJDS+SQ@MR
RTOONQS+BTRGHNM
AQ@BJDS+OBA'G.S(
BNQC+ONVDQ
SQ@MR+ONVDQ
EQNMSO@A@RR&X
SQ@MR+ONVDQ
EQNMSO@A@RR&X
ATRGHMF+@BBNQC
L@HMOBA@RR&X
2/
27
24
25
26
25
26
O@MDK+QD@Q
22
23
23
20
21
21
08
GNKCDQ+KDC
GD@SRHMJ
GNKCDQ+OBA
16
17
18
17
18
15
14
ENNS
11
12
13
12
13
10
1/
03
JMNA+LNLR
07
06
04
05
05
JMNA+CDK@X
JMNA+RDS
00
02
01
0/
8
1
BLC0@287
ONVDQKDCOBA
CNVMKN@COBA
@BNTSKDSROBA
CHFHS@KHMOTSOBA
BNMMDBSNQOBA
26,4
26,5
26,5
26,3
27,0
26,8
26,7
BNO00635D
27,1
26,6
L@HMOBA
LNLROBA
OGNMDOBA
BLC0@276
BLC0@287
BJE0/@143Y
26,0
BI@1A/32Y@
BKS4U/26YD
BNO00634D
BKS4U/26YD
BNO00634D
26,2
26,1
JGQ0@/17
SNMDOBA
JDXOBA
EHOOBA
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
0
3
0
0
0
0
0
0
0
0
0
0
0
BLG0@104
BT@0@118
JGF0@/4/
JGF0@/4/
BLC0@1/8
BJB3A034R35
BJB3A034R35
BLC0@306
BGF0@0/3
BLX0@137
BLX0@137
BGD0@06/
BLC0@376
BLC0@376
BJK1@/58G32
BLC1@332
BAS0@708J017
BAS0@8/2LLYB11
BAS0@8/2LLYB11
BAS0@8/4LAXB11
BAS0@8/3LAYB11
BAS0@8/3LAYB11
BLJ0@/0/
BLB0@1//
BLB0@1//
BAB0@036LAYB11
BFK0@110
0
0
2
0
3
3
1
0
1
1
0
0
1
1
0
3
0
0
0
0
0
0
0
1
0
0
0
0
0
0
GNKCDQ+UNKTLD
HMCHB@SNQ+UNKTLD
HMCHB@SNQ+UNKTLD
CDRBQHOSHNM
B@O+UNKTLD
B@O+UNKTLD
O@MDK+EQNMS
JMNA+QNS@QX
AC@FD+G@QL@M.J@QCNM
2
EHKSDQ+EHO
VHMCNV+EHO
5
7
6
4
3
0
1
1
MN
BLG0@103
BFK0@111
BFK0@111
O@QSRMN-
BFW0@227LAB11
BFW0@227LAB11
JFA0@000W
BLY0@/77
BAM0@063LAB11
BFV0@255QCYG32
BFT0@206Y
0
0
0
0
0
P+sx
2
0
0
0
0
0
R0
R01
R02
R03
R02
R03
R8
R00
R0/
R6
R7
R7
R5
R4
R3
R1
R2
R2
MN
06
BSA2*7IEB
RBQDV
RBQDV+RODBH@K
RBQDV
RBQDV
RBQDV
RBQDV
BGC3@/01
BSA2*7IEY
BSA2*05FEY
BSA2*7IEY
BSA2*05FEY
RBQDV+RODBH@K
RBQDV+SQ@MR
RBQDV
RBQDV
RBQDV
RBQDV
RBQDV
RBQDV
RBQDV
RBQDV
RBQDV
RBQDV
BSA3*5EEB
BGC0@/01Y
BSA2*5I
BSA2*0/FEY
BGC0@/12
BGC0@/12
BSA2*0/F
BSVR2*0/F
BSVR2*0/F
BSV2*01I
BSA2*7I
BSV2*7I
4
0
1
0
1
3
1
08
5
18
18
2
0/
8
26
0
0
CDRBQHOSHNM
O@QSRMN-
P+sx
26,2
26,0
26,4
26,5
3/,4
3/,3
27,0
3/,0
27,1
3/,2
28,0
26,3
26,7
36
31
01
32
33
3/,1
31
A@CFD+LNCDK
JFA0@035Y
0
32
HMRTK@SNQ+ETMBSHNM
BLW0@037
1
33
HMRTK@SNQ+RDS
BLW0@038
1
BTRGHNM
BTRGHNM+QTAADQ
35
34
BGF0@05/
BGF0@046
0
0
0
36
A@CFD+SNO
BFA0@041Y
0
1
1
BLW0@06/
HMRTK@SNQ+ONVDQ
37
1
BLW0@062
HMRTK@SNQ+ETMBSHNM'K(
38
37
38
@UQ024.12/DWOKNCDUHDV
Click on the first or last page to see other AVR 135 (serv.man3) service manuals if exist.