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Symptom
AMP Sound Dead.
1. "LEFT" Channel dead.
2. "RIGHT" Channel dead.
3. "CENTER" Channel dead.
4. "REAR" Channel dead.
5. "REAR CENTER" Channel dead.
AC-3/DTS Failure.
(DSP Sound Mode)
Video Output Dead.
Video down output Dead.
Video up output Dead.
Cause and Remedy
B) TONE I.C check.
1. Signal IN/OUT terminal check.
2. I.C voltage check. ( +7.5)V, ( -7.5 )V
3. I.C CLK/DATA/STB/MUTE
A) Signal Mute TR's inferior.
B) Connector disconnection & disjunction.
Change or close insertion of the connector.
C) Speaker wire's disjunction.
Close insertion of the speaker wire.
D) Signal switching IC check.
1. I.C voltage check ( +7.5 )V, ( -7.5 )V
2. Switching I.C control data check.
3. Switching I.C signal IN/OUT check.
A) I.C Regulator check.
DIGITAL IN + ( 5 )V, ANALOG IN + ( 5 )V
IN + ( 3.3)V, OUT + ( 1.2 )V
IN + ( 5 )V, OUT + ( 3.3 )V
B) DIR check.
1. OSC check.
2. RMCK, RBCK, RLRCK, RDATA Check.
3. Micom Interface Port Check.
C) DSP Check.
1. INTREQ Check.
2. LRCK Check.
3. Micom Interface Port Check.
4. SDATA 1, 2, 3,4 Check.
D) D/A Check.
1. LRCK/BCK/SDATA check.
2. Signal out check.
A) Video Regulator voltage check.
1. DC voltage check. B+ ( 9 )V, B+ ( 5 )V, B- ( -5)V I.C No. ( 204,203,205)
B) Video selector control IC check.
1. DC voltage check. B+ ( 5 )V, B- ( -5)V
2. DC voltage check. B+ ( 5 )V, B- ( -5)V
3. Micom control data check.
C) Video input detect port check.
1. Micom CV, SV, COMPONENT-V detect port.
A) Video voltage check.
1. DC voltage check. B+ ( 3.3)V
B) S-Video input signal check.
1. Yin, Cin signal check.
A) Micom Interface Port Check.
1. SCL, SDA port check.
B) C-Video Input video input signal check.
S-Video Input video input signal check.
C) Component video output check.
19
Ref No.
I.C No. ( 401 )
I.C PIN No. ( 16,18 )
I.C PIN No. (69,68,70,71)
Q 507,509,510,511
CP ( 411)
I.C No. ( 401 )
I.C Pin No. ( 16,18)
I.C PIN No. (69,68,70,71)
I.C No. ( 801 )
I.C No. (807 )
I.C800
X-TAL ( 800 )
I.C Pin No. ( 09) ( 15 ) ( 16 ) ( 17 )
I.C Pin No. ( 66,67,73,74,75 )
I.C No. ( 805)
I.C Pin No. ( 108 )
I.C Pin No. ( 16,107 )
I.C Pin No. ( 66,67,68,69,70,71)
I.C Pin No. ( 92,94,95,97 )
I.C No. ( 800)
I.C Pin No. ( 17,18,19)
I.C Pin No. ( 49,47,45,43,41,39,37,35 )
IC NO(201)/IC PIN No.(7,18)
IC NO(217,218)/IC PIN No.(16,7)
I.C Pin No. ( 7,8,17,18 )
I.C NO. ( 402 ) / I.C Pin No. ( 10,13,15)
I.C NO. ( 209 ) / I.C Pin No. (5 )
I.C Pin No. ( 1,8 )
I.C NO. ( 402 ) / I.C Pin No. (17,18 )
I.C NO. ( 217) / I.C Pin No. (11,12,14)
I.C NO. (218) / I.C Pin No. (1,5,12,14 )
I.C NO.(201) / I.C Pin No.(20,22,24)
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