Sony KV-SW29M31 Service Manual ▷ View online
– 5 –
KV-SW29M31/M91/M50/M90/M60K/SW29N90
RM-W103 RM-W104 RM-W109 RM-W150
5. HANDLING OF SELF-DIAGNOSTIC SCREEN DISPLAY
Since the diagnosis results displayed on the screen are not automatically cleared, always check the self-diagnostic screen
during repairs. When you have completed the repairs, clear the result display to "0".
during repairs. When you have completed the repairs, clear the result display to "0".
Unless the result display is cleared to "0", the self-diagnosis function will not be able to detect subsequent faults after
completion of the repairs.
completion of the repairs.
[Clearing the result display]
To clear the result display to "0", press buttons on the remote commander sequentially when the self-diagnostic screen is
displayed, as shown below:
To clear the result display to "0", press buttons on the remote commander sequentially when the self-diagnostic screen is
displayed, as shown below:
Channel [8]
/ "0"
[Quitting Self-diagnostic screen]
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
To quit the entire self-diagnostic screen, turn off the power switch on the remote commander or the main unit.
6. SELF-DIAGNOSTIC CIRCUIT
[+B overcurrent OCP ]
Occurs when an overcurrent on the +B (135V) line is detected by pin 97 of IC001
(A Board). If the voltage of pin 97 of IC001 (A Board) is less than 3.9V, the unit will
automatically go to standby.
(A Board). If the voltage of pin 97 of IC001 (A Board) is less than 3.9V, the unit will
automatically go to standby.
[Vertical NG]
Occurs when an absence of the vertical deflection pulse is detected by pin 116 of
IC001 (A Board).
IC001 (A Board).
[IK $AKB%]
If the RGB levels* do not balance within 15 sec after the power is turned on, this error
will be detected by IC001 (A Board). TV will stay on, and indicator will start to Blink 5
times.
will be detected by IC001 (A Board). TV will stay on, and indicator will start to Blink 5
times.
[Supply Voltage Protection]
Occurs when IC001 internal Supply Voltage Protection detects less than 4.2V due to
unproper power supply to IC001. TV cuts off high voltage power of anode CRT. No
picture will be detected eg IC607, IC604 go faulty.
unproper power supply to IC001. TV cuts off high voltage power of anode CRT. No
picture will be detected eg IC607, IC604 go faulty.
* (Refers to the RGB levels of the AKB detection Ref pulse that detects 1K)
A BOARD
IC001
Y/CHROMA JUNGLE
A BOARD
IC503
V.OUT
A BOARD
IC001
SYSTEM
A BOARD
IC003
MEMORY
FROM
C BOARD
IC751 PIN 5
IK
EHTO
RED LED
DISPLAY
SDA1
V.GUARD
SDA
5
F.B-PLS
3
116
45
97
7
A BOARD
FROM
Q511
COLLECTOR
30
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KV-SW29M31/M91/M50/M90/M60K/SW29N90
RM-W103 RM-W104 RM-W109 RM-W150
SECTION 1
DISASSEMBLY
1-2.
SPEAKER REMOVAL
1-1.
REAR COVER REMOVAL
1-6.
SERVICE POSITION (KV-SW29M60K)
2 Rear cover
1 Eleven screws
(BVTP 4
× 16)
1 Two screws
(Washer Head)
(+P4
(Washer Head)
(+P4
× 16)
1-3.
CHASSIS ASSY REMOVAL
(EXCEPT KV-SW29M60K)
1-4.
CHASSIS ASSY REMOVAL
(KV-SW29M60K)
1-5.
SERVICE POSITION
(EXCEPT KV-SW29M60K)
– 7 –
KV-SW29M31/M91/M50/M90/M60K/SW29N90
RM-W103 RM-W104 RM-W109 RM-W150
2 One screw
(+BVTP 3
(+BVTP 3
× 12)
4 Two Hooks
3 One screw
(+BVTP 4
(+BVTP 4
× 16)
6 Two screws
(+BVTP 3
(+BVTP 3
× 12)
5 Terminal Bracket
1 One screw
(+BVTP 3
(+BVTP 3
× 12)
7 J3 Board
1-7.
TERMINAL BRACKET AND J3 BOARD
REMOVAL (EXCEPT KV-SW29M60K)
2 One Screw
(+BVTP 3
(+BVTP 3
× 12)
3 One screw
(+BVTP 4
(+BVTP 4
× 16)
6 Two screws
(+BVTP 3
(+BVTP 3
× 12)
5 Terminal Bracket
1 One screw
(+BVTP 3
(+BVTP 3
× 12)
7 J3 Board
4 Two Hooks
1-8.
TERMINAL BRACKET AND J3 BOARD
REMOVAL (KV-SW29M60K)
3 F Board
2 One Hook
1 One screw
(+BVTAP 3
(+BVTAP 3
× 12)
1-9.
F BOARD REMOVAL
(EXCEPT KV-SW29M60K)
2 Four Hooks
3 F Board
1 One Screw
(+BVTP 3
(+BVTP 3
× 12)
4 Two Hooks
5
K Board
3
B Board
1 Three screws
(+BVTAP 3
(+BVTAP 3
× 12)
2 Five
connectors
connectors
1-11. B AND K BOARDS REMOVAL
(KV-SW29M60K)
1 Six Hooks
2
H5 Board
2
H4 Board
1 Four
Hooks
Hooks
1-12. H4 AND H5 BOARDS REMOVAL
(EXCEPT KV-SW29M60K)
1-10. F BOARD AND BRACKET, F PWB
REMOVAL (KV-SW29M60K)
– 8 –
KV-SW29M31/M91/M50/M90/M60K/SW29N90
RM-W103 RM-W104 RM-W109 RM-W150
1-16. D3 BOARD REMOVAL
3 Five Hooks
1 Four Hooks
4
H5 Board
2
H4 Board
1-13. H4 AND H5 BOARDS REMOVAL
(KV-SW29M60K)
2 Five screws
(3
(3
× 12),(+)BVTAP
1 One screw (washer head)
(+P 3
(+P 3
× 12)
3 Four Hooks
4 A Board
1-14. A BOARD REMOVAL
(EXCEPT KV-SW29M60K)
2 Five screws
(+BVTAP 3
(+BVTAP 3
× 12)
1 One screw
(washer head)
(+P 3
(washer head)
(+P 3
× 12)
4 Four Hooks
3 A Board
1-15. A BOARD REMOVAL (KV-SW29M60K)
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