3-10
4. OSD CIRCUIT
(1) No OSD display.
(2) I
2
C BUS CHECK
KEY doesn’t working.
Is 5V applied to the IC501
Pin79?
Does LED or FLD change
when a function button is
pressed?
No OSD or F.OSD display.
Is 5.3V applied to the
IC501 Pin53?
Does oscillation occur at
the IC501 Pins44, 45?
Replace the IC501.
The I
2
C waves don’t
come out.
Does Power appear at the
Pull up impedence
(R569, R507)?
Replace the IC501.
Refer to “SMPS 5.3VA
Trouble Shooting”.
Replace the defective
switches.
Refer to “SMPS 5.3VA
Trouble Shooting”.
Check or Replace the phe-
ripheral Circurity.(L511,
R518, C596, C595)
Refer to “SMPS 5.3VA
Trouble Shooting”.
YES
YES
YES
YES
NO
NO
NO
NO
NO
2. SERVO CIRCUIT
(4) KEY doesn’t working
Summary of Contents for ABV341 Series
Page 2: ......
Page 36: ...3 34 3 35 2 TU IF CIRCUIT DIAGRAM PB REC...
Page 39: ...3 40 3 41 5 JACK CIRCUIT DIAGRAM...
Page 41: ...3 44 3 45 7 TIMER CIRCUIT DIAGRAM XBV343...
Page 42: ...3 46 3 47 8 TIMER CIRCUIT DIAGRAM XBV342...
Page 45: ...3 52 3 53 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE...
Page 65: ...02 12 04 R17149A ZENITH DAP202K 3 80 3 81 6 JACK CIRCUIT DIAGRAM...
Page 70: ...LOCATION GUIDE 3 90 3 91 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD TOP VIEW...
Page 71: ...LOCATION GUIDE 3 92 3 93 2 MAIN P C BOARD BOTTOM VIEW...
Page 99: ...3 123 3 124 3 AUDIO CIRCUIT DIAGRAM COMBI SCART MTK 03 3 25 SR17447A...
Page 100: ...3 125 3 126 4 AV JACK CIRCUIT DIAGRAM COMBI SCART MTK 03 3 25 SR17446A...
Page 103: ...3 131 3 132 PRINTED CIRCUIT DIAGRAMS 1 MAIN P C BOARD LOCATION GUIDE...
Page 134: ...4 22 GEAR F R GEAR AY P2 P3 F R Lever Tension Base Boss CAM...
