Service manual

LC-20VM2

LC-121M2E

LC-150M2E

6-6. Service Adjusting

6-6-1. Main chassis adjustment

Adjustment Adjusting conditions Adjusting method

1 +B Adjustment 1. Connect the DC voltmeter to 1. Adjust the DC/DC 5V line output

(+B ADJ Item) TP1101 voltage so as to get 5.0±0.05V.

(DAC 16ch )

2 Setting

(MODEL) MODEL V2U

(SYSTEM) SYSTEM AUTO

(COPY GUARD) COPY GUARD ON

(MASK) MASK OFF

3 Counter-bias adjustment 1. Set the AV1 mode to set signal 1. Adjust COM so as to minimize the

(COM Item) noninput state. waveform peak-peak.

2. Fit the specified adjusting instrument (DAC2 2ch)

to the screen center.

3. Observe the adjusting instrument

output on the oscilloscope.

4 NTSC / PALM OSC 1. Input the NTSC monoscope 1. Adjust OSC so as to get the normal

adjustment pattern to AV1. screen.

(NTSC/PALM OSC Item)

6-6-2. N358 signal adjustment

Adjustment Adjustment conditions Adjustment method

1 Brightness adjustment 1. Input the NTSC standard color bar 1. Adjust N358 BRIGHTNESS, and

(N358 BRIGHTNESS Item) to AV1. adjust the black level of G output so

2. Connect the oscilloscope to TP821 as to get DC 0.35±0.05V.

(IC316, pin7, G output).

2 R CUTOFF adjustment 1. Input the NTSC standard color bar 1. Adjust R CUTOFF so as to equalize

(R CUTOFF Item) to AV1. the black levels of green and red.

2. Connect CH1 of the oscilloscope to

TP821 (IC316, pin7, G output).

3. Connect CH2 of the oscilloscope to

TP819 (IC315, pin1, R output).