SERVICE PROCEDURES-1
TX-SR705/SA705
1. Replacing the fuses
This symbol located near the fuse indicates that the
fuse used is show operating type, For continued protection against
fire hazard, replace with same type fuse, For fuse rating, refer to
the marking adjacent to the symbol.
Ce symbole indique que le fusible utilise est e lent.
Pour une protection permanente, n'utiliser que des fusibles de meme
type. Ce demier est indique la qu le present symbol est apposre.
2. To initialize the unit
This model uses not a capacitor but a EEPROM IC in order to retain radio presets and other settings. So, memory
contents will be kept eternally with no care.
1. Press and hold down
VCR/DVR
button, then press
STANDBY/ON
button when the unit is powered on.
2. After "
C l e a r
" is displayed, the preset memory and each mode stored in the memory are initialized and will
return to the factory settings, and turn to Standby mode.
4. Memory Backup
When a power amplifier of certain channel is broken and goes into Protect mode, the following parts in the channel
must be replaced at the same time, because these parts get damage together in most cases.
5. Replacing Power Amplifier Parts
3. Safety check out
REF NO.
PART NAME
DESCRIPTION
PART NO.
REMARKS
F901 FUSE
10A-UL/T-233
252330GR
!, <DC, DT>
F6901 FUSE
12A-TUL-250V
252301GR
!
F6902
FUSE
12A-TUL-250V
252301GR
!
<Notes>
<MK> : TX-SR705 Korean model
<MQ> : TX-SR705 Hong kong model
<MR> : TX-SA705 Chinese model
<MA> : TX-SR705 Australian model
<MT> : TX-SR705 Southeast Asian model
<MO> : TX-SR705 Saudi model
<MP> : TX-SR705 European model
<DC>
<DT>
: TX-SR705 USA and Canadian model
: TX-SR705 Taiwanese model
5A-UL/ T-233
F903 FUSE
!,
<DC>
252326GR
F903 FUSE
!,
<MP>
2.5A-SE-EAK
252075GR
F901
FUSE
5A-SE-EAK
252078GR
!, <MP, MA, MO, MK, MQ, MT, MR>
!, <DC, DT>
F910 FUSE
5A-UL/T-233
252326GR
5A-SE-EAK
252078GR
!, <MP, MA, MO, MK, MQ, MT, MR>
F910 FUSE
(U.S.A. model only)
After correcting the original service problem, perform the following safety check before releasing the unit to
the customer.
Leakage current Check
Measure the leakage current to a known earth ground (water pipe or conduct etc.) by connecting a leakage current
tester between the earth ground and exposed metal parts of the unit (input/output ground terminals, screw heads or
metal overlays etc.).
Plug the power supply cord directly into a 120Vac 60Hz wall socket and turn STANDBY/ON button on.
Any current measured must not exceed 0.5mA.
Front L ch
Q6051,Q6061
Q6031,Q6041
Q6011,Q6001
C6041,R6101
R6081,R6091
R6071,R6021
Front R ch
Q6052,Q6062
Q6032,Q6042
Q6012,Q6002
C6042,R6102
R6082,R6092
R6072,R6022
Center ch
Q6050,Q6060
Q6030,Q6040
Q6010,Q6000
C6040,R6100
R6080,R6090
R6070,R6020
Surround L ch
Q6053,Q6063
Q6033,Q6043
Q6013,Q6003
C6043,R6103
R6083,R6093
R6073,R6023
Surround R ch
Q6054,Q6064
Q6034,Q6044
Q6014,Q6004
C6044,R6104
R6084,R6094
R6074,R6024
Surround Back
L ch
Q6055,Q6065
Q6035,Q6045
Q6015,Q6005
C6045,R6105
R6085,R6095
R6075,R6025
Surround Back
R ch
Q6056,Q6066
Q6036,Q6046
Q6016,Q6006
C6046,R6106
R6086,R6096
R6076,R6026
