Philips MC-D370/21M - Page 15

2-3 2-3
Check IC152 Data From
MC-D370 REPAIR INSTRUCTIONS (2 of 2)
+5v Supply Circuit
No
Check
Pin41 Circuit
JK401 to IC106
Check Between
Check
OK
OK
IC106 Circuit
J
At DVD mode
Check Q408 "C" =+5v
Digital Line
No Output
Circuit
Check Q401"E" Mute
Yes
and around Part Circuit
Check IC402
Yes
Subwoofer Line
No Output
if being signal
Check IC402 Pin6
No
I
Check Q400 and Q401
Q404,Q405 and Q402
Check
H
Q402"E" MUTE Circuit
OK
OK
Check
Check Between
C415 C414 to
to Jk401 Circuit
Audio Line
No Output
to CN500 Circuit
IC500 Pin1 and Pin7
Check Between
RE-insert and fix
the cable
Yes
RB700 Cable loose or INT
No Sound
Ear Head Phone
Check
OK
No
IC500 Circuit
G
Check Between CN500 to
to Tuner PCB circuit)
Chect main PCB of Tuner input Circuit
OK
(Between IC400 Pin2 and Pin15
No
REpair Emdec section: Between
IC101 Pin21 to Pin22 circuit
IC101 Pin17 to RB101 Pin15(L-CH)
IC101 Pin16 to RB101 Pin13(R-CH)
OK OK
Check IC101 audio output
Check T105
Yes
Between EF001 to Q101/Q102 circuit
REpair FM IF section:
No FM function
Change
Q103,Q104
Check Q103,Q104
No
Yes
Q101,Q102
Check FM IF Output
Check FM IF Output
Q101,Q102
NoNo AM function
Check AM IF T102/CF103
(Between EF001 Pin8 to IC152 Pin14 circuit)
B: Repair FM osc section
(Between IC101 Pin30 to IC152 Pin13 circuit)
No
A: Repair AM osc section (T003) or
Check IC152 or
VT section Circuit
No
Pin14--FM input
VT No Change
Check IC152 OSC input
Pin13--AM input
High Frequency=8.0-9.0v
LOW Frequency=1.5-2.0v
Check tuner VT From C161
OK
and around Part
Check IC108
No
Q104 Circuit
Check Q106 and
Check Repair Between
No
Q104"C"=+5v
RB101 to main pcb IC104
Yes
No Output
Tuner
Yes
Pin5/CL, Pin6/DO
RB101 Pin3/CE, Pin4/DI,
and IC104 Circuit
F
Check Q106"C"=+12v