I'm diagnosing my Beocord 3300 model 2942 which has the left playback volume much lower and more hissy than the right hand channel. I've owned the unit from new and have never had any work done on it till now.
I'm working my way thorough the left and right Play Back amplifier circuits. With regard to the resistors I've found the following. The left channel resistors are 400 numbers and the right 200.
Resistors R201 and R401 are specified as 150k in the schematics, but actually read in circuit 11k and 112k respectively. R209 and R409 should be 68 ohms but read 28 and 68 respectively. Interestingly, R209 is actually 2 resistors piggy backed (running in parallel I assume) whereas R409 is one resistor. Did B&O run out of resistors?
Before I a) test them out of circuit and b) replace them, I'd like some guidance these may be part of the problem. Or, is it a pretty common situation components are changed in final assembly so differ from the schematics.
I'm working my way thorough the left and right Play Back amplifier circuits. With regard to the resistors I've found the following. The left channel resistors are 400 numbers and the right 200.
Resistors R201 and R401 are specified as 150k in the schematics, but actually read in circuit 11k and 112k respectively. R209 and R409 should be 68 ohms but read 28 and 68 respectively. Interestingly, R209 is actually 2 resistors piggy backed (running in parallel I assume) whereas R409 is one resistor. Did B&O run out of resistors?
Before I a) test them out of circuit and b) replace them, I'd like some guidance these may be part of the problem. Or, is it a pretty common situation components are changed in final assembly so differ from the schematics.
