Panasonic RX-DS45 Service Manual page 31

RX-DS45
* Checking Operations of Replaced Traverse Deck (New Traverse Deck)
a) Check the operations described below on the traverse deck after replacing it.
* Checking Skip Search * Checking Using Defect Disc.
1. Play an ordinary musical program disc. 1. Play the 0.7 mm biack dot and the 0.7 mm wedge on
2. Press the skip button to check for normal skip search the defect test disc (SZZP1054C) and verify that no
operation (in both the forward and reverse directions). sound skip or noise occurs.
2. Play the middle tracks of the uneven test disc
* Checking Manual Search (SZZP1056C) and verify that no sound skip or noise
1. Play an ordinary musical program disc. occurs.
2. Press the manual search button to check for smooth
manual search operations at either low or high speed
(in both the forward and reverse directions).
b) If the operations are normal, CD adjustment are not required when the traverse deck is replaced.
Note: CD adjustments are required in the cases below. (Mechanical adjustments are not necessary.)
(See item 2-7 on pp. 41~45.)
eif audio is not played back continuously or noises occur after step (a) is excuted.
@{f the adjustment VRs (VR701~VR706) were rotated before the traverse deck was replaced.
eif the ICs in the servo circuit or adjustment VRs were replaced.
Caution:
elt is very dangerous to look at or touch the laser beam. (Laser radiation is invisible.)
With the unit turned "on", laser radiation is emitted from the pickup lens.
Avoid exposure to the laser beam, especially when performing adjustments.
Vorsicht:
eVermeiden Sie es, in den Laserstrahl zu blicken oder inn zu beriihren. (Laserstrahlen sind unsichtbar.)
Bei eingeschaltetem CD-Spieler werden Laserstrahlen aus der Aufnahmelinse abgestrahit.
Vermeiden Sie direkte Aussetzung von Laserstrahlen, insbesondere wahrend der Einstellarbeiten.
Measuring instruments and Speciai Tools e Audio frequency (AF) oscillator
Servo gain adjuster (SZZP1017F or SZZP1094C-1) eConversion connector (SZZP1032F)
Test discs @2 mm allen wrench (SZZP1101C)
1, Playability test disc (SZZP1054C)
2. Uneven test disc (SZZP1056C) As to the replacement of the following parts, refer to
3. Black band test disc (SZ22P1057C) the specified sections for adjustment.
@Norma! disc
@Dual-beam oscilloscope with bandwidth of 30 MHz or better
(with EXT trigger and 1:1 probe).
@TEMPORARY SETTING OF EACH VR @ ALIGNMENT POINT
Please refer to Circuit Board and Wiring Connection Diagram for
test point locations.
FOCUS TRACKING TRACKING
GAIN GAIN OFFSET
VR? ~— vR [vR705 | VR706
TRACKING BEST
BALANCE EYE
1C 707
OFFSET 2
TRACKING TRACKING
eaance A706] GAIN
1C701 VR7O2
{C705
or require readjustment, temporarily set them to the following
positions.
(crecre VR setting if any of the trimmer VRs are replaced )
FOCUS
OFFSET
~A41—