SERVICE PROCEDURE
ALIGNMENT PROCEDURES
1.MAIN AMP idling Adjustment
SET CONDITION
1) SEMI VOLUME POSITION at MAIN/SURROUND AMP Board
MAIN:VR101,VR102,VR103,VR104
SURROUND:VR501,VR601,VR701
NO Signal/No Load
AC Line Voltage:120V/60Hz.230V/50Hz
2) After turning on the unit keep it over than 25min (keep the power/Driver TR as normal temperature)
3) Adjust the voltage value of primary&secondary of wafer to be 25mV by rotating the semi volume of each channel
to the right
CHANNEL
ADJUSTMENT
MEASUREMENT
VOLTAGE
FRONT-L CH
VR104
P114
23+/-2mV
FRONT-R CH
VR101
P111
23+/-2mV
SURROUND-L CH
VR103
P113
23+/-2mV
SURROUND-R CH
VR102
P112
23+/-2mV
4) CAUTION
In case that power TR or DRIVER TR is needed to be replace for repairing the corresponding channel should be
adjusted again
FRONT AMP:Q437.Q333.Q335.Q439.Q438.Q334.Q336.Q440
SURROUND AMP:Q618.Q619.Q518.Q519.Q718.Q719
2.SURROUND BACK AMP idling Adjustment
SET CONDITION
1) SEMI VOLUME POSITION at CENTER/SURROUND BACK AMP Board
CENTER:VR501
SURROUND BACK:VR601.VR701
NO Signal/No Load
AC Line Voltage:120V/60Hz.230V/50Hz
2) After turning on the unit keep it over than 25min (keep the power/Driver TR as normal temperature)
3) Adjust the voltage value of primary&secondary of wafer to be 25mV by rotating the semi volume of each channel
to the right
CHANNEL
ADJUSTMENT
MEASUREMENT
VOLTAGE
CENTER
VR501
P501
23+/-2mV
SURR BACK-L CH
VR601
P601
23+/-2mV
SURR BACK-R CH
VR701
P701
23+/-2mV
4) CAUTION
In case that power TR or DVIER TR is needed to be replace for repairing the corresponding channel should
be adjusted again
CENTER AMP:Q519,Q517.Q516,Q518
SUR BACK AMP:Q618.Q617.Q618.Q619.Q716.Q717.Q718.Q719
3.Cautions for main adjustment
1) At MAIN/SUPPLY BOARD.use the below capacitor after discharging for sufficent time for preventing
possible damage from electrical spark
MAIN BOARD
C151.C152
AVR7550HD 15000/63V
SUPPLY BOARD
C3101,C3102
AVR7550HD 10000/63V
2)The checking for MAIN/SUPPLY BOARD should have the discharging circuit discharge
over 30sec.through(4R7Ohm 10W)resistor after push power sw off
AVR
7550HD
harman/kardon
34
Summary of Contents for AVR 7550HD
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Page 125: ...3 DAD1580BRT HDMI IC2039 4 ADA4410 6ACPZ HDMI IC2034 AVR 7550HD harman kardon 125 ...
Page 126: ...5 ADV7340BSTZ HDMI IC2032 AVR 7550HD harman kardon 126 ...
Page 127: ...6 BU4051BCF DSP IC4059 AVR 7550HD harman kardon 127 ...
Page 129: ...9 CD74HC4053M96 HDMI IC2036 AVR 7550HD harman kardon 129 ...
Page 130: ...10 CS4391A KZZ DSP IC4033 IC4038 IC4040 AVR 7550HD harman kardon 130 ...
Page 131: ...11 CS5368 CQZ DSP IC4017 AVR 7550HD harman kardon 131 ...
Page 132: ...12 D790E001BZDH275 DSP IC4023 IC4034 AVR 7550HD harman kardon 132 ...
Page 133: ...13 DM9161AEP ETHER IC5002 AVR 7550HD harman kardon 133 ...
Page 137: ...20 M12L64164A 5TG DSP IC4022 IC4027 IC4031 IC4042 AVR 7550HD harman kardon 137 ...
Page 138: ...21 M24256 BWMN6TP DSP IC4042 22 M24C08 WMN6TP HDMI IC2011 AVR 7550HD harman kardon 138 ...
Page 142: ...29 SN74LV125APWR DSP IC4061 IC4062 AVR 7550HD harman kardon 142 ...
Page 143: ...30 SN74LVC1G04DCKR HDMI IC2037 AVR 7550HD harman kardon 143 ...
Page 145: ...34 SN74LVC827APWR HDMI IC2014 AVR 7550HD harman kardon 145 ...
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Page 147: ...35 UPD70F3718GC8EAA DSP IC4041 AVR 7550HD harman kardon 147 ...
Page 148: ...36 XC9572XL 5VQG64C VQG64 DSP IC4015 AVR 7550HD harman kardon 148 ...
Page 152: ...43 NJM4556AD PROCESSOR IC1014 44 LC74763M VIDEO IC1518 AVR 7550HD harman kardon 152 ...
Page 153: ...45 TC9273CFG 004 PROCESSOR IC1000 IC1017 AVR 7550HD harman kardon 153 ...
Page 159: ...2 WIN24M576HZ DSP Y4001 AVR 7550HD harman kardon 159 ...
Page 161: ...5 KSM603TE2E FRONT RM3501 6 LP 200TL FRONT RM3502 AVR 7550HD harman kardon 161 ...
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