Panasonic SA-AS52, Service Manual

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This CD test mode is provided to check CD unit without
connecting to changer loading mechanism. This mode shall
operate CD PLAY with CD unit being connected only and CD
Automatic Alignment result is shown on FL display.
11.1. How to set CD test mode
12.1. Cassette Deck Section
•
Measurement Condition
−
Reverse-mode selector switch:
−
Tape edit: NORMAL
−
Record timer: OFF
−
Make sure head, capstan and press roller are clean.
−
Judgeable room temperature 20 ± 5 °C (68 ± 9°F)
•
Measuring instrument
−
EVM (Electronic Volmeter)
−
Digital quency counter
•
Test Tape
−
Head azimuth adjustment (8 kHz, -20 dB); QZZCFM
−
Tape speed gain adjustment (3 kHz, -10 dB);
QZZCWAT
−
Playback gain adjustment (315 Hz, 0 dB); QZZCFM
−
CrO2 tape, QZZCRX
12.1.1. Head Azimuth Adjustment (Deck
1/2)
Caution:
•
Please replace both azimuth adjustment screw
(RHE5152ZB) and springs (RM0331) simultaneously when
readjusting the head azimuth. (shown in Fig. 2) Even if you
11.2. CD Automatically Adjustment
result indication
Under CD test mode, pressing the numeric key ‘0’ on the
remote controller will display the auto adjustment result.
FLOCK, TLOCK and CLVS status shall be shown as below:
During the above display, executing CD PLAY will display auto
adjustment result for CD PLAY mode.
wish to readjust the head azimuth without replacing the
acrews and springs, a fine adjustment to the azimuth screw
and spring.
•
Please remove the screw-locking bond left on the head
base when replacing the azimuth screw.
•
If you wish to readjust the head azimuth, be sure to adjust
with adhering the cassette tape closely to the mechanism
by pushing the center of cassette tape with your finger.
(shown in Fig. 3)
1. Playback the azimuth adjustment portion (8 kHz, -20dB) of
the test tape (QZZCFM) in the forward play mode. Vary the
azimuth adjustment screw until the output of the R-CH (PB
OUT-R) are maximized.
2. Perform the same adjustment in the reverse play mode.
3. After the adjustment, apply screwlock to the azimuth
adjusting screw.
11 CD Test Mode Function
12 Measurements and Adjustments
20
SA-AK52