Troubleshooting; Cccccceeeee - Pioneer XR-P270C Service Manual

XR-P270C,XR-P170C
7.2.2 TROUBLESHOOTING
Do not short-circuit I1C1003 and IC1005 (ICP) for diagnosis. If the regulator is damaged by short circuit in ICP, the parts will be
damaged to a wide extent of setting, making repair difficult.
LIST OF ERROR CODES
An error code will be displayed by the CD calendar in the LCD.
[1]: DC DET DC appears in the SP terminal.
Vp +17.5V is over 20V.
Current passes toward the chassis.
: Vp Vp is below 6V or over 20V.
: DECK I Initialization could not be made.
[4]: DECK II
POINT TO BE CHECKED
Defective IC1201
Improper operation of the regulator. See "Adjustment of Vp cannot made".
Mica Sheet, 10/1W (Power assy R1251) may be open.
Regulator
Adjustment of Vp (Refer to page 48).
Output of +17V and +6V SINK may be improper.
Reel pulse may be improper.
Deck mechanism lock (Lights up [3] and [4].)
@ The power of the system does not turn to ON. The backlight does not light up.
Pulse has reached
CN1002-@ AC 2
LCD lights up ?
IC1005
2A ICP are open ?
IC1005 continues
open ?
+5 V P.P REG
64
Yes
Remove from the AF assy.
Remove CN1002.
Primary fuse, voltage switch, and
transformer temperature fuse
+5.6 V, microprocessor
The backlight bulb is bumt out.
Connect the AF assy.
Remove the CD assy.
1¢1005 continues
open ?
7 CD loading circuit
CD FFC
No
Deck 17 V system
Backlight system