29H-FD5RU
Abnormal
Check the 14V, 120V and 210V line from the main PWB side.
(14V,120 V, 210 V line).
Normal
Check CRT connector (KY), (H) bias
Check R,G,B input and output of IC 851.
18-2
GREENGREEN
RED
TROUBLE SHOOTING TABLEREDCheck the power circuit consisting of IC701, IC702, T701 and its related parts. Also check the horizontal out circuit Q604 and its related parts.
LED COLOUR ?Power on by R/C.
YesNo
Does horizontal circuit momentary oscillate?
NO RASTER
Check protector circuit and pin 106 & 107 (waveform no.3 & 4) of IC 2100. Also check the waveform no.7 of IC501 at pin 4 and its related parts.
.
18-1
Adjustment conditions/procedureWaveform or remarks
PIP key : Use this key to activate and deactivate the sub-picture. MOVE key : Use this key to check the 4 corner movement of sub-picture position. SWAP key : Use this key to reverse images of the sub-picture with the main picture. FREEZE key : Use this key to make image of sub- picture becomes static.PIP TV/VIDEO : Use this key to switch TV/Video of the sub-picture. PIP-CH UP/DOWN : Use this key to switch channel of sub-picture.
1) Receive RF signal and AV input (atleast one of them must be moving picture). 2) Using every key as below, check the operation of the PIP operation.1) Receive the RF monoscope pattern signal.2) Activate the PIP sub-picture.3) Select the MENU key, then go to INSET mode to select the BRIGHTNESS. (MENU ---> PICTURE ---> INSET ---> BRIGHTNESS)4) Press the Volume Up/Down key to check the BRIGHTNESS effect OK or NOT. -in.2) Activate the PIP sub-picture.3) Select the MENU key, then go to INSET mode to select the TINT. (MENU ---> PICTURE ---> INSET ---> TINT)4) Press the Volume Up/Down key to check the TINT effect OK or NOT.
PIP SUB-TINTPIP BRIGHTN- ESSPIP TINT1) Receive the NTSC colour bar signal through AVAdjustment point
PIP OPERATION CHECKING ( for model with PIP only)23
1
No.
18 |
ACEC
SHARP
