Electrical Adjustments - Sony STR-DA4ES Service Manual

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[IDLING CURRENT ADJUSTMENT]
Measuring Instrument:
Adjustment Procedure:
Channel Test point
FRONT L TP501
FRONT R TP551
CENTER TP652
SURROUND L TP701
SURROUND R TP751
SURR BACK L TP651
SURR BACK R TP601
Adjustment Location:
[AMP BOARD]
TP501
RV501
RV701
TP701
[OSD ADJUSTMENT]
Measuring Instrument:
Procedure:
TE
L 13942296513
1. Connect the frequency counter to check connector (TP201) of
the S VIDEO board.
2. Connect between Pin 3 to Pin 4 of TP201 by lead wire.
3. Adjust the respective adjustment element so that the frequency
counter read specification.
Adj.
VA333ES
I
DA4ES, DA7ES
II
4. After check, remove the lead wire connected in step 2.
Adjustment Location:
[S-VIDEO BOARD]
CT204
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ELECTRICAL ADJUSTMENT
Digital voltmeter
Adjust the respective adjustment elements so that the voltage (absolute value) across the corresponding
testpoints satisfies the specification.
Adjustment element Specification
RV501
RV551
RV652
RV701 4.0mV±0.5mV
RV751
RV651
RV601
TP652
RV652
VR601
RV651
TP651
TP601
frequency counter
Adjustment
MODEL
NTSC
(CLOCK BOARD)
PAL
(CLOCK BOARD)
(S-VIDEO BOARD)
All models
(S-VIDEO BOARD)
CT203
1
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4
y
TP201
i
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SECTION 5
2 9
8
TP551
RV551
VR751
TP751
S- VIDEO
BOARD
Q Q
3 6 7 1 3
TP201
1
4
measurement
point
element
CT202
CT201
TP201
Pin 1
CT203
CT204 TP201
Pin 2
.
STR-DA4ES/DA7ES/VA333ES
9 4 2 8
frequency counter
1 5 0 5 8 2 9 9 4
+
–
Shorting
Specification
3.579545MHz ±50Hz
4.433618MHz ±50Hz
3.57954MHz ±50Hz
7.20MHz ±0.01MHz
[CLOCK BOARD]
CT201
m
CT202
co
9 9
2 8 9 9
17