Troubleshooting

9-1 PRELIMINARY PROCEDURES↑ TOP

If a problem should occur with the tape recorder, check that the following items are correct before proceeding.

As an aid in troubleshooting, refer to the following section and the schematic diagrams and parts lists included in this manual.

1. Head stacks are cleaned and demagnetized.
2. Head azimuth and height are correct.
3. Record bias has been adjusted properly.
4. Recommended tape has been used.
5. Input and output connectors are correctly wired.
6. AC line voltage tap is set to the correct value.
7. All operational switches have been correctly set.
8. Adjustment procedures have been correctly made using accurate test equipment.

9-2 TROUBLESHOOTING HINTS↑ TOP

Some of the more common problems, points to confirm and possible causes are listed in Table 9-1 and 9-2.

When a problem occurs, first, confirm certain points, and if the problem does not resolve itself, inspect other possible causes.

Table 9-1 Troubleshooting Hints for Amplifiers

Item	Symptom	Items to be checked	Defective parts
1	Record does not function.	Examine the READY/SAFE switch, input & output connector, head cords and consult operational procedures.	RL301 or Q301 on PB- 14Z or PB-151 is defective.
2	SEL/REP does not function.	Examine the MONITOR SELECT switch position, and consult operational procedures.	RL301 or Q301 on PB- 14Z or PB-151 is defective.
3	Bias level is not high enough.	Examine bias level, and resonance peak.	Q209, 210,211 or 212 on PB-14Z or PB-151 is defective.
4	Output level is not high enough.	Examine the LINE OUTPUT LEVEL switch position.	IC103 or 104 on PB-14Z or PB-151 is defective.
5	TEST OSC does not function.	Examine the MONITOR SELECT and TEST OSC switch position.	IC501 or 502 on PB-45E is defective.

Table 9-2 Troubleshooting Hints for Transport

Item	Symptom	Items to be checked	Defective parts
1	Transport does not function.	Examine the POWER switch, Power cord, fuses, Power receptacle.	IC4 or 9 is defective on CB-317.
2	NO PLAY, F.FWD or RWD mode function.	Examine tape threading[sic] tension arm positions and EDIT switch.	IC1, Q4, 6, 7,8,9,10,11 14, 15, 16 or 18 on PB-44S is defective.
3	Record does not function or Record indicator does not light up.	Examine operational procedures.	IC1 or Q2 on PB-44S is defective.
4	EDIT does not function or EDIT indicator does not light up.	Examine operational procedures.	IC1 or 33 on PB-44S is defective.
5	Timer does not function.	Examine tape threading and tension arm positions.	IC2, 3, 32 or 33 on PB- 44S is defective. Photo interrupter on PB-82M is defective.
6	Pinch roller does not function.	Examine looseness of nuts.	Q11, 14 or 18 on PB-44S is defective.
7	Brake does not function.	Examine the stroke of the Brake solenoid and smooth motion of the Brake arm.	Q4, 11, 15 or 16 on PB- 44S is defective.
8	Capstan does not rotate or speed is incorrect.	Examine the connector of capstan motor P.C. Board[sic] tension arm positions, pitch control knob position, and speed switch position.	Q5 on PB-44S is defective. Capstan motor or capstan motor P.C. Board is defective.