Troubleshooting; System Control Error Correction Flow Chart; Sound Error Correction Flow Chart - Kenwood KDV-MP4339 Service Manual

1. System Control Error Correction Flow Chart

Something wrong with the system control?
YES
No power?
YES
NO
Checked the Fuse?
YES
NO
Checked the Back up Vdd and Gnd, Acc?
YES
NO
Checked the Main Micom Back up Vdd?
YES
NO
Checked the Main Micom Back up Gnd?
YES
NO
Checked the Main Micom Reset?
YES
NO
Checked the Main Micom X-tal?
YES
NO
Checked the ACC in?
YES
NO
Checked the detachable switch?
YES
NO
Checked the Front Panel VDD?
YES
NO
Checked the Front Panel KEY input?
YES
OK
Something wrong with the system control?
YES
Not available to Remocon?
YES
NO
Checked the Remocon Sens Vdd?
YES
NO
Checked the Remocon Sens line?
YES
OK
Something wrong with the system control?
YES
Not available to Volume control?
YES
NO
Checked the Encoder Volume?
YES
NO
Checked the Volume IC control?
YES
OK
Something wrong with the system control?
YES
Not available to Key Control?
YES
NO
Checked the Tact switch?
YES
NO
Checked the Key line?
YES
OK

TROUBLESHOOTING

Inside of CN802, F801
CN801(16, 15)
IC301(15, 14)
IC401(100, 99, 81, 30, 50, 47, 97, 20, 51)
IC402, IC401(90)
X401, X402
F301, Q301, Q302, IC401(38), CN801(14)
CN901(19), IC401(74)
CN901(14), IC401(21), Q316, Q317
IC401(52, 53)
RMC1, R905
CN901(5), IC401(5)
EV901, CN901(6, 7), IC401(40, 41)
IC401(1, 2), IC601(22, 23)
SW901 ~ SW917, EV901
CN901(8, 9), IC401(52, 53)
KDV-3241Y/MP4339
/MP4439/MP5032
Something wrong with the system control?
YES
Not available to Telephone Mute?
YES
NO
Checked the tel mute input?
YES
NO
Checked the Mute Control?
YES
OK
Something wrong with the system control?
YES
Not available to ANT(Motor Type) Control?
YES
NO
Checked the ANT control?
YES
OK
Something wrong with the system control?
YES
Not available to Remote(Power AMP) control?
YES
NO
Checked the Remote control?
YES
OK

2. Sound Error Correction Flow Chart

Something wrong With the Sound?
YES
No sounds of All Functions?
YES
NO
Checked the E-VR Vdd?
YES
NO
Checked the E-VR Ground?
YES
NO
Checked the E-VR control?
YES
NO
Checked the E-VR Mute Control?
YES
NO
Checked the E-VR Signal in/out?
YES
NO
Checked the Power IC Vdd?
YES
NO
Checked the Power IC Ground?
YES
NO
Checked the Power IC Control?
YES
NO
Checked the Power IC Signal in/out?
YES
NO
Checked the main connector?
YES
OK
CN801(5), Q305, Q306, IC401(62)
IC401(1, 2, 3, 6, 61), IC601(21, 22, 23),
IC801(22), Q706, Q707, Q709, Q710
CN801(10), IC302, IC401(63)
CN801(6), IC301(12), IC401(87)
IC601(24)
IC601(15)
IC601(22, 23), IC401(1, 2)
IC601(21), IC401(6)
IC601(5, 6, 7, 8, 11, 13, 16, 17, 18, 19, 20)
IC801(6, 20)
IC801(1, 2, 8, 13, 18, 24)
IC801(4, 22), IC401(3, 10)
IC801(3, 5, 7, 9, 11, 12, 14, 15, 17, 19, 21, 23)
CN801(1, 2, 3, 4, 8, 9, 12, 13)
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