34N-WF5H
No.AdjustingPointAdjusting ConditionsAdjusting Procedure
1VCO adjustmentSignal: Good local channel1. Receive the good local channel.
(L205 and L255 onAdjusting point:2. Connect the digital voltmeter to pins (28) and (29)
Tuner Unit)L205 and L255of JA connector (SC1401).
Specification:3. Select the JWS address 033 and set it to "1".
2.2 ?0.1 Vp-p4. Adjust the VCO coils (L205 and L255) to have the
2.2V level. (Main: L205, Sub: L255)
5. Set the JWS address 033 to "0".
6. Clear the JWS address 033 and quit the JWS
mode.
2RF AGC adjust-Signal: Good local channel1. Receive the good local channel.
ment (R219 andAdjusting point:2. Select the JWS address 033 and set it to O1�.
R269 on TunerR219 and R2693. Adjust R219 and R269 to achieve optimum screen
Unit)Specification:without noises and beats. (Main: R219, Sub: R269)
No noticeable noise4. Receive other channel signals. Check the screen
as mentioned in the above step 3.
5. Set the JWS address 033 to O0�.
6. Clear the JWS address 033 and quit the JWS
mode.
Note 1:
Before switching to other channels (in Step 4 .
above), take Steps 5. and 6. and quit the JWS
mode.
Note 2:
When the R219 and R269 controls are set to mini-
mum, there will be nothing seen on the screen
(black raster).
3Detection outputSignal: NTSC standard half1. Receive the NTSC standard half color bar signal.
level adjustmentcolor bar signal2. Connect the oscilloscope between TP401 (TP402)
(R233 and R283 onAdjusting point:on Tuner Unit and GND. (Main: TP401, Sub: TP402)
Tuner Unit)R233 and R2833. Using the R233 control, adjust the main IF detec-
Specification:tion output level.
1.0 ?0.05 Vp-p4. Using the R283 control, adjust the sub IF detec-
tion output level.
1.0Vp-p
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ACEC
