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Note : U n less otherwise noted, a l l test points and adjustments are located on the MA I N board.
No.
Item
Check Point
S mode
TP3
7
R E C F M
(PR E/R EC)
level
R180 R188
0 9 0 0
(][)
0 0 0 0 0 0
§i
®
(]])
0\
@®
@
8
N mode
TP3
R E C F M
(PR E/R EC)
level
9
SP R EC
TP307
Color Level
and Balance
2-6
Signal
Adjustment Parts
• S·VHS mode
R 1 80
• E P mode
(S-M O D E
• R EC
R EC F M )
• Co lor bars
0 0
0 0 0 0
0
0 o o 0
o 0 [q2] ClD o
i§l
§i
@ (]])
®
TP307
R339
• N mode
R 1 88
• EP mode
{N-MODE
• R EC
R EC F M )
• Co lo r bars
• S-VHS mode
R339
• PB mode
(SP R EC
• M H- 1 H color bars 1 . Connect an oscil loscope to TP307. Play back
COLO R )
• SP mode
• R E C then PB
• Color bars
• SP mode
F ig. 2-4-6
&
Mode
Note: Connect an oscilloscope G N D terminal to
TP-G N D near the shield case of the PR E/
R EC board.
1 . Connect an oscil loscope to TP3 of the P R E/
R EC board and record a color bars signal i n
t h e E P mode.
2 . Adjust R 1 80 for 3.5 ± 0.2 Vp-p pedesta l
level, between centers of the waveform out
l i n e at the pedesta l portion .
1 . In the same manner as above (Sec. 2 . 4 . 7 ) .
adjust R 1 88 for 1 .9 ± 0. 1 Vp-p pedestal
leve l .
Note: Use larger-level waveform for adjustment.
a color bar segment of the M H - 1 H and
ob� color signal level.
· 2,�Adjust By pressing the + and - tracking
buttons of the F RONT panel for maxim u m
level o f the color waveform and make a note
of the higher color level "A".
3. Set the tracking control of the F R ONT
pane l to the per-set position by simu ltaneous
ly pressing the + and - tracking buttons.
4. Record and paly back a color bar signal . I f
necessary, before recording, adjust R339 so
that the higher level channel becomes 95 to
1 05% of the noted level "A" during playbck .
At this time, confirm that the channel differ
ence is within
Description
Fig. 2-4-5
d B .
5
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