Samsung MAX-632P - 6-2 Cassette Deck Troubleshooting

6-2 Cassette Deck
Block
Main Function
Check Point
Check for voltage at pin32
1 P/B Deck : L
2 P/B DECK : H
Check for pin 24 of FIC3 when deck operate
Check for voltage at pin 28
When between song : High(Normal)
When playing song : Low(Normal)
Convert of P/B & R/P SIGNAL
& DECK OUTPUT OF IC
AMPS
Convert P/B & Source Signal
DOLBY NR AMP
DIC1 (KA2271)
BIAS OSC
µ-com UIC1
VF DISPLAY
Drive VF DISPLAY
Oscillate RECORD BIAS (105KHz)
Oscillate RECORD BIAS (105KHz)
Control DECK MECHA
Control VF DISPLAY
Control MUTE circuit
Control each circuit
Check for RESET
When power is turned ON
Check VF DISPLAY
TP2 check
Osc Frequency : 105KHz
When inoperative : LQ4,LQ5 check
DQ1,1R,Gate check
Check for voltage at pin 4
R/P mode : High
R/P mode : Low
Dubbing mode : High
When in operative FIC3 pin26 check
TAPE IC JIC1
(BA3442AKS)
Mode
P/B
R/P
DUBBING
FIC3 pin12
H
L
H
Mode
OFF
ON
FIC3 pin12
H
L
Mode
REC
PLAY
DQ1L/1R
-10V
1.4V
DIC1 pin 13 check
Convert DOLBY NR ON/OFF
Samsung Electronics 6-5
Troubleshooting