SONY MHCBX5
Manual de Servicio

Note : Clear RF signal waveform means that the shape � � � can be clearly distinguished at the center of the waveform.
RF signal waveform VOLT/DIV : 200mV TIME/DIV : 500ns

Adjustment Location: [BD BOARD] (Conductor Side)

level : 1.45 ± 0.3Vp-p

E-F Balance (1 Track jump) Check
oscilloscope BD board TP(TEO) TP(VC)

12 TP (TEO)

TP (AGCCON) IC103 1 24 40 41 TP (FEI)

TP (XPCK) 21 20 1 80 60 61

Procedure : 1. Connect oscilloscope to TP (TEO) and TP (VC). 2. Turned Power switch on. 3. Load a disc (YEDS-18) and playback the number five track. 4. Press the gG button. (Becomes the 1 track jump mode.) 5. Confirm that the level B and A (DC voltage) on the oscilloscope waveform.
1 track jump waveform center of waveform B 0V level=1.3±0.6Vp-p Specified level: �� � 100=less than ±22% A B symmetry A (DC voltage)

TP (FEO) TP (VC)

IC101

TP (RF)

TP (DGND)

6. After check, remove the lead wire connected in step 1. RF PLL Free-run Frequency Check Procedure : 1. Connect frequency counter to test point (XPCK) with lead wire.
BD board TP (XPCK) frequency counter

2. Turned Power switch on. 3. Put the disc (YEDS-18) in to play the number five track. Confirm that reading on frequency counter is 4.3218MHz.

20