Sony STR-DA7ES - Section 5 Electrical Adjustment; [Idling Current Adjustment]; [OSD Adjustment]

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