System Microcomputer Test Program; Oel Adjustment - Pioneer DEH-P6880MP Service Manual

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6.4 SYSTEM MICROCOMPUTER TEST PROGRAM

- PCL output
In the normal operation mode (with the detachable panel installed, the ACC switched ON, the standby mode
cancelled), shift the TESTIN IC601 (Pin 86) terminal to H.
The clock signal is output from the PCL terminal IC601 (Pin 37).
The frequency of the clock signal is 468.75 kHz that is one 32th of the fundamental frequency.
The clock signal should be 468.75 kHz ± 19 Hz.
If the clock signal is out of the range, the X'tal (X601) should be replaced with new one.

6.5 OEL ADJUSTMENT

Adjustment point
KEYBOARD UNIT(SIDE B)
<When the OEL Unit has been replaced>
1. Use VR1970 to adjust the resistance between TP1 and TP3 to 6.2 kΩ.
2. Use VR1971 to adjust the resistance between TP2 and TP3 to 6.2 kΩ.
5
6
DEH-P5850MP/XN/ES
6
7
TP1
TP3
TP2
Digital Multi-Meter
7
8
A
B
C
D
E
F
53
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