Pioneer XV-DV370 Service Manual page 31

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5. Operations during Service Test Mode
• Basically, operations in Service Test mode are the same as in Normal mode. However, to indicate that the unit is in
Service Test mode, the following are displayed when the functions are changed:
[Functions]
DVD/CD
USB
TUNER
LINE
6. Failures
• Depending on the types of errors, one of the following error messages will be displayed when the unit is turned on:
P R T C T E
A protection circuit was activated:
1. The V+10, V+5 or V+6R8 was short-circuited (See the protection circuit on "10.2 DVD MAIN ASSY (2/5)"),
or the value at V+10, V+5, or V+6R8 exceeded the standard value because of an abnormality in its power section.
2. The XPROTECT port (22-pin) line up to the system-control computer (IC5501) was short-circuited by grounding or was
broken.
D V D P R T C T
Abnormality in the DVD section
1. The V+5V, or V+3 was short-circuited, or the value at V+5V, or V+3 exceeded the standard value because of an
abnormality in its power section.
2. The VDET port (17-pin) line up to the system-control computer (IC5501) was short-circuited by grounding or was broken.
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(See VDET circuit on "10.2 DVD MAIN ASSY (2/5)")
E E P E R R
1. Breakage or short-circuiting of the communication line between the microcomputer (IC5501) and the EEPROM (IC5502)
can be suspected.
2. A failure in the EEPROM (IC5502) can be suspected.
O C E R R 1
O C E R R 2
• If "OC ERR 1, 2" is not displayed when the unit is turned on in Normal mode, short-circuiting of the speaker terminals
can be suspected. (It causes speaker cable "+", "-" short.)
• If "OC ERR 1, 2" is displayed again when the unit is turned on in Normal mode, the following causes can be suspected:
1. One or more of the ICs among the three digital amplifier ICs (IC3201, IC3301, and IC3401: TAS5122DCA) on the
DAMP Assy is in failure.
2. The line between one of the above digital amplifier ICs and the speaker terminals is short-circuited.
3. The SHUTDOWN port (77-pin) line from one of the above digital amplifier ICs to the system-control computer (IC5501)
is short-circuited by grounding or is broken.
4 V+BSW voltage is too low.
5 (no reproduce) When both polarities of speaker cable are short , make volume up.
6 (no reproduce) Speaker cable touch the chassis of set.
O V E R T E M P
• If "OVERTEMP" is not displayed when the unit is turned on in Normal mode, the unit is normal. The protection circuit
was activated because the temperature at the three digital amplifier ICs (IC3201, IC3301, and IC3401: TAS5122DCA)
had become too high. Because it is likely that this was a temporary temperature rise, lower the volume of the speakers.
• If "OVERTEMP" is displayed again when the unit is turned on in Normal mode, the following causes can be suspected:
1. One or more of the ICs among the three digital amplifier ICs (IC3201, IC3301, and IC3401: TAS5122DCA) on the
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DAMP Assy is in failure.
2. The XOTW port (79-pin) line from one of the above digital amplifier ICs to the system-control computer (IC5501) is
short-circuited by grounding or is broken.
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When the function is set to LINE, the Surround setting is fixed to
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X-STEREO (5 CH STEREO), which is only for Service Test
mode. (In Normal mode, it is fixed to 2 CH STEREO.) In such a
case, do not check the sound through the headphones, because
headphone operation with X-STEREO (5 CH STEREO) is not
guaranteed. If you wish to check the sound through the
headphones, use a function other than LINE.
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