Sony HCD-RV222 Service Manual page 24

HCD-RV222
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VIDEO SECTION
AUDIO LEVEL, VIDEO CLOCK, AUDIO SERVO
CLOCK CHECK
VMP43GY board
TP415 (L-OUT)
TP413 (R-OUT)
VMP43GY board
TP70 (54 MHz)
TP182 (4.2336 MHz)
Procedure :
1. Connect an oscilloscope to TP308 (V-OUT) on the VMP43GY
board.
2. Connect a level meter to TP415 (L-OUT) and TP413 (R-OUT)
on the VMP43GY board.
3. Connect a frequency counter to TP70 (54 MHz) and TP182
(4.2336 MHz) on the VMP43GY board.
3. Press the button to turn the power on.
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4. Set a test disc (HLV-402 (Part No. 8-909-870-00))
5. Set to the MPEG AV TEST mode. (Refer to the CD SERVICE
MODE (See page 19))
6. The message "MPEG AV" is displayed on the flourescent
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L 13942296513
indicator tube. Color bar signal outputs and sine-wave (1 kHz
0dB) appears.
7. Confirm that the value of level meter is 2.5 ± 2.0 dBs. (If audio
output disappear, press the [PRESET EQ] button, and the
message "SERVICE MODE" is displayed on the flourescent
indicator tube)
8. Confirm that the value of frequency counter is 54 MHz ± 400
Hz.
9. Confirm that the value of frequency counter is 4,2336 MHz.
10. Change disc to a MP3 test disc (MP3 1kHz 0dB sine-wave is
recorded)
11. Confirm that the value of level meter is 2.4 ± 2.0 dBs.
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level meter
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–
frequency counter
+
–
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– VMP43GY BOARD (Component Side) –
TP70
(54 MHz)
TP182
(4.2336 MHz)
TP413
TP415
(R-OUT)
(L-OUT)
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