Sony HCD-EX1 COMPACT COMPONENT SYSTEM – SMPS and Power Amplifier Circuit Diagram

HOW TO ADJUST THE CAM PHASE

Insert the cam so that the boss touches the SW lever at the left shown in the figure.

Rotate the cam in the arrow direction, and adjust the phase until the boss touches the SW lever shown in the figure.

With the phase adjusted, attach the parts using the following procedure.

STEP1: Insert the boss of the slider (3) in the groove of the cam.

STEP2: Set the mecha cover to the groove on the slider (3) and attach.

STEP3: Insert the boss of the lever (1) in the hole of the slider (3) and attach.

STEP4: While bending the slider (2) slightly in the arrow direction, insert it in the groove of the guides (L) and (R) and attach.

LCD All Lit and Key Check Mode

1. While pressing the FUNCTION button and >|| button, connect the power plug to the outlet.

2. When the test mode is set, the characters “STEP” are displayed on the LCD.

3. While pressing the DISPLAY button, press the >|| button. The whole LCD lights up.

4. Each time the FUNCTION button is pressed, the display switches between all lit n partial lighting 1 n partial lighting 2 n all lit.

5. When the Stop button is pressed, “KEY 0” is displayed and the key check mode is set.

6. Each time the button is pressed, the counter counts up. Buttons once pressed will not be counted when pressed again.

When all buttons have been pressed, “KEY OK” is displayed.

7. To end, press the Power button to turn OFF the power, and disconnect the power plug from the outlet.

Note: Pressing buttons other than those specified in steps 4 and 5 displays modes not used in servicing. In such cases, press the 1/u button to exit the mode, and repeat from step 3 again.

Aging Mode

The aging mode automatically repeats the operations of the CD.
When an error occurs:
Aging stops
When no error occurs:
Aging is performed repeatedly.

1. Set any CD. (One with a short playback time of the final track is recommended.)
2. While pressing the FUNCTION button and >|| button, connect the power plug to the outlet.
3. When the test mode is set, the characters “STEP” is displayed on the LCD.
4. When the >|| button is pressed while pressing the DISPLAY button, “AGING” will be displayed, and aging is performed in the
following sequence. While aging is performed, “REP” will be displayed blinking.
5. Pressing the DISPLAY button during aging displays the cycle number (@ CY where @ is the number of agings).
6. To end aging, press the Power button, turn OFF the power, and disconnect the power plug from the outlet.

SMPS AND POWER AMPLIFIER CIRCUIT DIAGRAM

LA5617 – STR F6674 – LM1876TF (Power Amp)

EXPLODED VIEW

MOTOR ASSY AND CAM