AIWA XPV831
Service Manual

SERVICE MODE -1/2
Automatic adjustment is repealed when starting TEST MODE. TEST MODE is operated after making it an initial-setting value. A VOL+/-key becomes invalid. It becomes invalid except the PLAY/PAUSE key at the time of an OFF display. 1. Starting Preparation and Release Method (1) Short-circuit the short land for TEST MODE starting of MAIN C.B with solder. (Fig.1 reference) (2) Supply a power supply and complete the preparation which starts TEST MODE. * In TEST MODE, detection of OPEN/CLOSE SW is disregarded and always hold a CLOSE state. (3) After TEST MODE release and TEST MODE use should surely remove the solder of a short land.

MAIN C.B
TEST MODE SHORT LAND IC301

IC401

Fig.1 MAIN C.B

2. TEST MODE Starting (1) TEST MODE starts by the PLAY/PAUSE key and shift to TOC lead operation. When DISC is put in (CD-RW is unreproducible at the time of starting) After TOC read completes, playback operation (1 time fast playback) (Fig.2 reference) * Other than TEST MODE 3 time fast playback.

0.8Vp-p

0.2V/DIV, 500

s/DIV

Fig.2 IC501 9pin RF signal (CD-DA)

* When the DISC is not inserted, (inserting the DISC, when reading is not possible) Err indication (Fig.3 reference)

Fig.3 Err indication

3. LCD all the light indications Pushes the PLAY/PAUSE key, before being time or Err indication of playback state, the PLAY MODE key it is pushed by the fact that the LCD all the light indications. (Fig.4 reference)

Fig.4 LCD all the light indications

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