Read Sony HCD-RV555 / MHC-RV555 Service Manual online
24
HCD-RV555
– VMP BOARD (SIDE A) –
TP70
(54 MHz)
TP182
(4.2336 MHz)
TP415
(L-OUT)
TP413
(R-OUT)
VIDEO SECTION
AUDIO LEVEL, VIDEO CLOCK, AUDIO SERVO
CLOCK CHECK
CLOCK CHECK
Procedure:
1. Connect an oscilloscope to TP308 (V-OUT) on the VMP
board.
2. Connect a level meter to TP415 (L-OUT) and TP413 (R-OUT)
on the VMP board.
3. Connect a frequency counter to TP70 (54 MHz) and TP182
(4.2336 MHz) on the VMP board.
4. Press the
I
/1
button to turn the power on.
5. Set a test disc (HLV-402 (Part No. 8-909-870-00))
6. Set to the MPEG AV TEST mode. (Refer to the CD SERVICE
6. Set to the MPEG AV TEST mode. (Refer to the CD SERVICE
MODE (See page 19))
7. The message “MPEG AV” is displayed on the fluorescent
indicator tube. Color bar signal outputs and sine-wave (1 kHz
0 dB) appears.
0 dB) appears.
8. 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
fluorescent indicator tube)
the message “SERVICE MODE” is displayed on the
fluorescent indicator tube)
9. Confirm that the value of frequency counter is 54 MHz
±
400
Hz.
10. Confirm that the value of frequency counter is 4,2336 MHz.
11. Change disc to a MP3 test disc (MP3 1 kHz 0 dB sine-wave is
11. Change disc to a MP3 test disc (MP3 1 kHz 0 dB sine-wave is
recorded)
12. Confirm that the value of level meter is 2.4
±
2.0 dBs.
+
–
–
level meter
VMP board
TP415 (L-OUT)
TP413 (R-OUT)
VMP board
TP70 (54 MHz)
TP182 (4.2336 MHz)
+
–
–
frequency counter
Click on the first or last page to see other HCD-RV555 / MHC-RV555 service manuals if exist.