Sony RDR-GX257 Servise Manual page 46
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Also See for RDR-GX257:
- Operating instructions manual (84 pages) ,
- Quick start manual (2 pages)
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2. WHEN PLAYING DISC, NO AUDIO OUTPUT
When playing DISC,
No audio output
YES
IC911
(PCM1780 ) pin14,15
(Audio_out R/L) are there
any signal?
YES
Audio
mute block
IC911 pin1,16(Z_mute) : H?
IC701 pin24(A_mute_L) : H?
(H:mute off,
L:on)
YES
IC910
TE
L 13942296513
(OPAMP) pin1,7 are there
any signal?
YES
IC801
(MM1763)
SCART model : pin34,
35,37,38
RCA model: pin37,38
are there any
signal?
YES
Check JACK & L/R/C
www
.
http://www.xiaoyu163.com
NO
pin5~8 (I2S,MCLK) :
IC911 pin11 (5V)
Check audio mute TR
NO
Q801,Q802,Q895,Q896
Q811,Q812,Q815,Q816
NO
12V & OPAMP application
NO
Check IC801 pin11,12
are there any signal?
pin31,32 (I2C) :
SW_12VA power
x
ao
u163
y
i
2 9
8
Check IC911
NO
.
pin2~4 (SPI ) :
YES
NO
Check
YES
Replace IC911
Q Q
Check
3
6 7
1 3
YES
Check IC801
NO
YES
SW_5.3VA,
NO
is O.K?
YES
Replace IC801
.
6-2
RDR-GX257/GX380
9 4
2 8
Check
FFC connector & MPEG IC
Check 5V
1 5
0 5
8
2 9
9 4
Check I2C line Micom
Tuner EEPROM
Check SW_5.3VA, SW_12VA
m
co
9 9
2 8
9 9
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