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Olympus OM-4 Service Manual Part 3 of 4

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1. Digivol e 02 OK e Some scores of ohms Breakage Check No 5 fcr soldering Check of Q301 b Defective soldeirng of LCD D pin No 5 c Q301 defective e Resolder each leg of Q301 e Short collector and emitter of Q301 gt Q301 defective when indication is obtain ed d Another circuit or LCD D IC defective E 110 LCD 7 No output from bipolar IC a Pattern broken e When PCV sounds in B C mode ses b Defective soldering of B P No 53 c No o signal outputted from CPU mode e When B C does not sound b terminat GNO in 1 CPU output should normally have the wave form shown on the right side When CPU output is CRU IC not provided defective 2 Input signal provided to B P c When input signal is not provided Pattern broken or defective soldering of No 25 9 Check of lead wire pattern and soldering Check No 53 i for soldering J No i Dm E p i 1 iai EON Le Ri wi us zx SN 8 amt j Digvol FQ amp Pattern Lead wire SER ak CE Nd ja BI inl GNO Synchro Check of o cutput Norma waveform of signai Waveform of signal 204S 1V E 111 oLCD 8 When output Provided from bipolar IC a Pattern broken b Check LCD D IC leg No 1 for soldering 3 Digivol t r
2. puse ex E 147 8 Bar Indication Blinks e Bar indication blinks about 3 segments e Preparations 1 Measuring instruments Digital voltmeter or circuit tester Synchroscope Luminance box 2 Mode AUTO or MANUAL lens should be attached in position 3 LCD should be lit in viewfinder e Shutter dial must not be set at B or mecha 1 60 e Bar indication blinks under fluorescent lamp or in day light when it varies 1 3 or more e When bar indication blinks in day light turn camera to vary light intensity e Check whether or not bar indication stops blinking in B C mode 1 Bar indication stops blinking in B C mode e Pull amp resistor of SB terminal dis connected Check pattern for breakage between R130 and camera body Digivol R Shouid be lower than severa ohms E 148 2 Bar indication does not stop blinking in B C mode 1 AV TV circuit defective la Check AV contact for floating up b Soldering defective AV TV circuit Check AV contact 2 CV SV circuit defective a Check CV SV contact for floating up b Soldering defective 18133 5601 Check soldering CV SV circuit Check CV contact Check SV contact E 149 Bar indication blinks during operation with luminance box When bar indication does not blink during operation with luminance box gt C108 floated up Resolder Check soldering E 150 Front C108 Broke
3. 15 7 SHADOW as 8 16 1 2000 dg OVER 1 1 gt lt 1 2 UNDER SPOT MEMO b When outputs provided to all terminals 1 2 Rubber connector defective sees Replace LCD defective orf ede tors Replace E 127 nection between Leg No Indication LegNo Indication LegNo Indication LegNo Indication 19 1 se 29 i 39 gt a 49 20 UNDER gt 30 40 604 50 1000 21 j 3 15 41 125 51 2 Shutter operation abnormal Operates though abnormaily 1 No indication in MANUAL mode e Shutter inoperative D ct isconne iP a Indication provided in MANUAL mode after disconnecting the following lead wire e Disconnect pink lead wire e Short the terminal with tweezers 1 Indication provided in MANUAL mode e SV circuit board SW defective A e P lead wire defective or desoldered Short set mode 2 No indication in MANUAL mode Q Check the following items e Pattern broken between P and CPU No 13 e Pattern broken between P and CPU No 19 e Improper soldering of CPU leg No 13 or 19 b HA and HB signal provided CPU No 55 H 3V CPU No 56 gt H 3V When HA and H8 not provided CPU IC defective When HA and HB provided 7 Indication obtainable terminal DC E 128 2 SPOT not indicated e Indication normal in MANUAL and AUTO modes e SPOT not indicated and shutter operates abnormal
4. YES Shutter ODeratio normal Dot AUTO and MANUAL moon Shutter ormaliv ooerates sn both AUTO and MANUAL modes Troubie n indication Output system indica tion circuit defective LED nd cAat On Norms view hnder Shutter operation abnormal in both or either of AUTO and MANUAL modes Trouble in f exposure control Output system CPU NO provides signal Trouble in data input system head amptifier or TVAVCV circuit defective Oderation normei inath er o AUTO and MANUAL modes LCD defective LCD O defective 1 Data reference cur Shutter rent circuit 1 MGI circuit 2 Reference voltage panne of AUTO 2 MG2 circuit circuit qnd MANUAL 1 Improper soldering 3 Trigger circuit 3 Decorder circuit oe of LC SD or CL 4 Comparator 4 Head amplifier 2 impraper soidering 5 NS CONT etc etc defective of arcuit LCD DI defective Shutter Operation normal n AUTO mode gt 1 CV SV circuit defective 2 Head amplifier etc defective 1 Head amplifier 2 Direct ASA 3 C value switching circuit etc 106 defective 216 LCD 13 LCD PW 4 LC operta forme ne 1 AV TV BV circuit an MANUAL i O 2 AD DA converter moas
5. Shutter kept open at low speed E 178 improper soldering o B P leg No 4 or 5 E 178 3 Shutter kept open in MANUAL mode only Pattern broken E 178 RV101 broken E 178 B P pin No 44 or 45 defective E 178 Shutter kept open in MANUAL mode C104 shorted E 178 E 79 2 5 Shutter Speed Too High 1 Shutter speed too high in both AUTO and MANUAL modes MG2 wire broken f i E 180 H lead wire broken i i E 180 H lead wire or pattern MG2 or related broken part defective E 180 i B lead wire or pattern broken i ee Waveform normal E 180 A 1 MG2 signai waveform observed Q202 broken E 179 E 180 C202 shorted E 180 B P pin No 57 defective E 181 Pattern broken Trg data wavetorm normal B P 1C defective E 181 Normai waveform notobserved T E 181 Trg data normal waveform MG 2 and related parts OK not observed Mechanism or IC defective E 181 E81 2 M SW chattering M SW defective E 182 E 182 3 Trg SW chattering Trg SW defective E 182 E 182 80 2 Shutter speed too high in AUTO mode only ro R127 shorted Head amplifier or related E 183 1 part defective E 183 Integral output too high E 183 H A lead wire shorted to camera body ASA resistor or EE adj E 184 2 circuit defective E 184 i
6. e Check pattern for breakage between IC leg No 7 and C114 E 152 1 2 3 4 Diagnosis by measuring BV1 input voltage 200 to 100 mV relative for Vref Normal OK BV output voltage is not provided from head amplifier when BV1 input voltage is 200 Check Vcc input to head amplifier Rear of head amplifier mV and invariable depending on brightness circuit board 350 to 200 mV relative to Vref es powe Vcc not supplied to head am Ix rn plifier Z XMj R Saldering defective On the order of 10 mV e Shorting between bipolar IC pin No 7 and pin No 8 Check shorting of IC 7 B and 79 BO e C108 shorted or broken On the order of 650 mV e Shorting between bipolar IC pin No 79 and pin No 80 7 Shorted E 153 5 On the order of 1 8V relative to Vref Shorting between head amplifier iC pin No 17 and pin No 80 Check shorting of iC 17 18 E 154 1 a e BV input not applied to bipolar pin No 7 Check head amplifier and reiated parts Normal operation in DIRECT AUTO mode Head amplifier is operating since integral out put is provided e Detach front plate Check continuity between bipolar IC pin No 7 and head amplifier pin No 16 e 220 kQ max via R124 e Several ohms max when R124 is not connected e Check soldering of head amplifier leg No 16 2 Digivol Rear surfac
7. 2 13 Reset Function Abnormal C902 broken Reset function ineffective in mode switching 8 D or G lead wire C105 shorted or broken Improper soldering of B P pin No 27 or 43 Auto reset function ineffective Pattern broken 3 Reset function ineffective in mode switching and CPU pin No 43 auto reset function defective E 200 C901 broken FLASH LED MEMO B C LED lights at mode switching time and auto reset time improper soldering of E 200 C tead wire E 92 2 14 Reference Voltage Vref Abnormal AV lead wire H shorted to camera body TV lead wire A shorted to camera body R129 shorted Triplet resistors or E 201 E 201 Triplet resistors or 3 Vret s 1V related part defective E 201 C114 shorted Pattern broken Vret OV E 201 E 93 2 15 DAC Adjusting Circuit Defective RV108 defective Pattern broken 1 Voitage invariable with DAC adj E 203 Improper soidering of 8 P pin No 70 B P leg No 10 11 or 12 defective Matching OK but indication abnorma CPU leg No 4 50r 6 defective 2 16 Correction Adjustment Abnormal CV contact defective Lead wire broken CV adj resistor defective RV104 defective correction impossible E 203 E 94 3 Troubleshooting Check Procedures 3 1 Electric System Dead e LCDand LED indicators are in
8. A lead wire broken 1 No LED lights net circuit defective E 197 Q105 broken Lamp only not light R116 or R119 broken Pattern broken Improper soldering of CPU leg No 32 LED defective D lead wire broken Q106 broken Flash LED onty not light Pattern broken E 197 R115 broken E 197 improper soidering of CPU pin No 33 Flash LED only not light E 197 W lead wire broken E 198 A lead wire broken E 198 198 B lead wire broken Both B C and SELF LEDs not ight E 198 improper soldering of B P pin No 41 E 198 LED defective E 198 U circuit board defective 198 W lead wire broken 6 MEMO LED only not light Improper soldering of CPU leg No 31 LED defective MEMO LED not extinguished E 198 LAMP LED not extinguished E 198 FLASH LED not extinguished E 198 amp 198 LED not extinguished E 198 E 89 7 8 10 LED not extinguished SELF LED not extinguished 0401 short d E 198 E 198 ntrarily durin b Baie MEE PN 3 Reset circuit defective E 198 LED not light only in 8 C or SELF mode IC defectiv i E 198 E 198 2 12 PCV Defective Improper bonding of E 199 PCV SW defective G lead wire broken B P pin No 25 defective 2 PCV not sound SELF mode and R lead wires E 199 E 91
9. Check leg No 1 for soldering E 112 9 LCD D circuit defective Voltage in normal condition Voltige check 1 3V e All voltages should normally be as shown above All voltages are measured from 3V line a 6 V not outputted as Vpisp Capacitor shorted e No indication 1 C301 shorted Indication faint when wire is broken C301 Measure voltage across both ends of C301 C302 Sca OV Shorting Shorted or e broken 2 C302 shorted or broken 2 No indication when C302 is shorted or broken Check procedure Measure voltage across both ends of C301 Capacitor voltage C emere w Note Some items are indicated even when another resistor is defective E 113 b Check of R306 and R307 for shorting e No item is indicated when R306 or R307 is shorted e indication is normal when R306 or R307 is broken R206 1 R306 shorted e Operate B C system PCV does not sound in B C mode e Voltage across both ends of C301 is 2 2 to 2 4 V R307 2 R307 shorted _ Operate B C system PCV does not sound in B C mode e Voltage across both ends of C301 is 2 4 to 2 6 V Digivot 10 LCD D IC defective e When the above checks are ineffective to locate cause and LCD indicates no item wiring is erroneous or LCD D IC is defective e Condition of LCD shouid be checked at the initial stage Note For checking LCD D circuit proceed as follows 1 Remove set
10. E 62 3 indication unreliable e All items not indicated but unnecessary items indicated e indication unstable and changed by switching mode e Shutter operates normally 1 Indication provided Unnecessary LCO O circuit defective R301 shorted characters and symbols displayed darkiy E 121 R302 R303 or R304 shorted E 121 2 indication provided Unnecessary LCD D circuit defective items indicated fai i indicated faintly R304 broken 6 121 E 121 3 Indication provided Unnecessary LCD D circuit defective R301 R302 or R303 characters indicated rather clearly broken E 121 All items indicated apparently E 121 Resistors shorted or broken Indication unreliable A 1 Indication changed by switching mode 2 Both bar and dot not indicated frequently 3 Character not indicated fre quently Power supply short ed to resistor or broken LCD D circuit defective Plural troubles E 123 tC leg Leg 7 8 or 9 defective Power supply broken E 125 LCD D IC defective LCD D circuit OK 125 LCD defective E 125 E 63 4 Some items not indicated e Necessary items not indicated LCO D circuit OK 2 Shutter operation also abnormal E 128 Remove SV Shutter operates abnormally Indication not provided in MANUAL mode E128 No SPOT i
11. Junchanged with ASA E 145 B P pin No 68 defective E 145 CV contact defective E 145 B P pin No 67 defective E 145 Bar indication unchanged with CV E 145 Pattern broken between terminal and pin No 6 E 145 Bar indication should be changed with ASA Pattern or lead wire broken in A or H system E 146 RV110 defective E 146 Bar indication unchanged Iwith CV or SV E 146 E 69 Bar indication unchanged with BV E 147 light intensity variation BV input voltage applied Bar indication changes with E 70 Improper soldering of IC leg No 7 of head amplifier E 147 Head amplifier or related part defective Seepage 151 E 147 BV level converter circuit defective E 147 8 Bar indication flickers Normal e Bar indication flickers in light from fluorescent lamp Bar indication flickers when luminance varies more than 1 3 EV in day light Extinguished in B C imode E 148 Flickers during operation f C108 floated u 2 with luminance box not flicker p _E 150 R130 broken Pattern broken between R130 and camera body Extinguished AV contact floarted up TV AV circuit defective Improper soldering of each part E 149 CV SV contact floated Up E 149 mproper soidering o each part E 149 CV SV circuit defective
12. Not extinguished E 149 E 150 E 71 2 3 Shutter Locked 1 Diagnosis with synchroscope hn SW defective M SW ON waveform E 162 O M SW OK not observed E 162 B lead wire broken E 162 1 fecti CPU MSW Q103 defective Y waveform only not observed E 163 P lead wire broken E 163 RS circuit board and Both Y and H wave 1 related parts OK torm riot observed RS circuit board defective E 163 E 163 Y or H lead wire broken B P MSW H waveform only not observed E 163 RS circuit board defective E 163 2 M SW chattering M SW chattering M SW contact pressure waveform improper 163 E 163 Improper soldering of B P leg No 61 E 163 Wire breakage between B P X No waveform of MG1 No 60 and R rand signal E 163 No MA or MB signal E 164 C201 leg floated up MG1 Charge OK Q201 deteriorated MG1 R lead wire dis connected MG1 C W lead wire disconnected No waveform of MG1 C signal E 164 B P leg No 60 defective E 164 E 72 improper soldering of Pattern broken TV circuit board C Lead wire broken or improper soldering Pattern broken M circuit board Improper soldering of B P pin No 55 or 56 E 165 1 No waveform of 4 Tr SW OK Trg SW E 164 C101 defective E 165 RV102 defective 165 Pattern broken between CPU pin No 30 and B
13. e Chattering Trg SW chattering e Check with a synchroscope e Normal waveform CUN M StS 2 e Chattering Check of M SW chattering Check of Trg SW chattering e DC C in A i i Fa i hro GND dl 0 5V E182 2 Shutter speed too high in AUTO mode only e Head amplifier or related circuit defective ASA resistor direct EE circuit or related part defective 1 Head amplifier or related circuit defective 1 R127 shorted R127 shorted Shorted 2 Integral output too high Check of integral output e See 3 2 9 Head amplifier or related part defective Check with a synchroscope e Release shutter at a low speed in AUTO mode Voltage should be lower than 1 6 V while shutter is closed e Normal waveform i GND Cines je Within 1 6V Waveform of integral output Normal 2V 0 15 Trg OFF Comparator OFF OFF 3x Shutter closed ids Aio ewes S Cz vA Cr UTE TL WON D Bal E 183 2 ASA resistor EE adj circuit or related part defective 1 ASA resistor lead wire shorted to camera Lead wire shorted to camera body body e H and A lead wire shorted Soldering shorted to screw 2 RV110 EE adj shorted to camera body 3 Others RV110 shorted to camera body e IC defective e Mechanism defective E 184 3 Shutter speed too high in MANUAL mode only e When indication is norma but shutter operati
14. ez drm P d Ht Light control OFF is 2 Leg No 49 3 When normal waveform is not observed CPU leg No 50 improperly soldered B P IC defective 2 Flash gives low light IC defective E 192 3 7 e EE abnormal at high luminance EE Adjustment Abnormal Adjustment of comparator offset Main comparator offset misadjusted _ e No stability of EE amt S e Check procedures WY 7 1 Set shutter speed at 1 sec in MANUAL e Solder lead wire mode PEN Nee 2 Connect a stabilizer power supply to posi tive side of C104 3 Connect negative side of the stabilizer to negative land of C114 4 Set the stabilizer at 1 V 5 Release shutter 6 Adjust RV103 so that shutter is closed within 1 sec Alligator connector Turn RV103 and stop it when shutte is closed to be completed within 1 sec 17 For this adjustment turn RV103 counter oi ider clockwise After releasing shutter turn Solder lesd wire Stabilizer RV103 clockwise and stop it when shutter is closed 8 Make sure that shutter can be closed within 1 sec Alligator connector When shutter cannot be closed within 1 sec e RV103 contact floated up lt Readjustment e Clean RV103 with a piece of dry cloth Checks in 2 and 4 C109 C110 or C111 leg or B P No 4 5 or 6 improperly soldered e When EE adjustment is abnormal at any one of three stages ASA 6 to 32 ASA 40 to 250 and A
15. 189 Normai waveform P lead wire broken not observed 196 189 Normal E 190 waveform not observed C203 shorted E 190 E 190 X SW defective B P IC defective i i S amp input waveform observed on B P pin No 59 but not on B P pin No 50 E 83 4 Light control impossible U circuit board defective E 191 P lead wire broken E 191 E 197 Fiash gives full light Short TTL iead wire P to power supply Incomplete Flash gives full 1 ight ia E E 191 E 191 B P pin No 48 or 49 defective E 191 CPU pin No 50 defective Check waveforms on B P Normal waveform pin No 48 and No 49 not observed E192 B P IC defective 192 2 Incomplete flash B P IC defective E 192 n E 84 2 7 Auto EE Adjustment Abnormal _Main comparator offset abnorma RV 103 defective Improper soldering of f C111 improper soldering of R121 or R122 Auto EE adjustment labnormal at high ASA improper soldering of C109 or R122 Auto EE adjustment abnormal at medium ASA T Improper soldering of Belge B P pin No 5 C110 abnormal at low ASA Improper soldering of RV103 defective a E 193 ASA100 Auto EE adjustment abnormal at high brightness Improper soidering Auto EE adjustment ASA100 improper soldering of 5 Jat low briahtness C109 E 193 Main SW chat
16. 50 and Tishing signal provided 59 x s l1 50 50 Flashing signal E Qu M 59 2 Hir edite SW ON signal ix OY A q ing signal 10m E SX mf gem iaa GND E 49 22 Over Under Exposure Circuit 1 Circuit diagram Bipolar IC 16 15 150 14 check GND in 2 Wiring diagram Flashing signal P 27 p uen exposure Cir ZEN ho 1 Check for over exposure 7 gt Check voltage Ims E after flashing gt The OVER indication should fight if the exposure is 1 EV or more higher than the correct level 2 Check for under exposure gt Check voltage 6 ms after flashing 50 Flashing The UNDER indication should light if the exposure signal is 0 6EV or more lower than the correct level i P T Oron 3 Operations of CPU 25 M Normal exposure 1 Outputs OA OB and OC signals ta check for over Over a under exposure f 2 Check result is informed by L signal from pin No 38 of the bipolar IC to pin No 29 of the CRU 3 The CPU indicates the result on the LCD ee Synchro Time chart oH Under exposure L Normal expousre e The over under exposure circuit has no external circuit Trouble in the over under exposure circuit is trated to defect in the IC or indication circuit E50 23 B C Circuit 1 Circuit diagram Bipolar Ic 2 Stereoscopic view e B C circuit 1 When the camera is set in th
17. H 3 Bipolar power supplied Vref 1 8V OK e Check of bipolar power supply Bipolar 2 Circuit x e 2 90 V or higher OK e When voltage is lower than 2 65 V 61 2 1 1 Pattern broken Al t a 2 Check bipolar power supply legs Pa j No 26 No 51 andNo 62 18 Paner Al for soldering Resolder 4 Power supplied to reset circuit e PCV sounds during mode switching e OK when voltage is higher than O 5 V e When voltaqe is lower than O 5 V im Digivol 9e 1 Reset circuit defective i 0 5V or NO Improper soldering of B P leg No 26 51 br iced or lower or 62 Check these parts for shorting 2 side of C902 shorted to power supply J E arene 5 CPU POWER HB output provided TTE eR ERA B58 EST E ud 33 nx ie 3 ANS L2 ZA NA B C a OSs t XT ES sn m LTT SAME Aw terminal J U M amp 5a ai p Digivel DC 56 SVJ ind mm E 98 DC voltage at 3 V OK fe When DC voltage is 0 V fE il 1 Improper soldering of CPU leg r 2 4 CPU IC defective No 53 or 56 ae When output is not provided after resoidering Bipolar power supply 6 Check POWER HB input e Check tne input when output is pro vided from CPU terminai x i 1 Digivol oc HA and HB supplied When DC voltag
18. OFF in reset condition am Bl G0 A L when B C boitage is 2 75V or higher R401 e Voltage checks 1 PCV output 2 at the L level on pin No 41 of B P Waveform of PCV output Check waveform with a synchroscope LED output Check the LED output to confirm that it is DC 2V 0 5ms a nA re RR rRNA A E 52 24 Seif Timer Circuit 1 Circuit diagram CPU OA 1 OB 2 oc i3 16 151 141 152 19 PCV IN 58 MA 159 MB 60 Self timer circuit 1 When the camera is set in the SELF mode the CPU delays MG1 ON time by MA and MB signals 12 seconds Therefore the shutter is locked for 12 seconds For the 12 seconds the CPU outputs H signal from pin No 58 to set pin No 52 of B P at ON The signal from pin No 52 of the CPU is inputted to pin No 19 of B P and reduced to 2 kHz by B P Then the signal is output ted from pin No 52 to sound the PCV 10 seconds later the CPU provides OA OB OC signals to set the output from pin No 52 at 4 kHz for the rest 2 seconds 12 seconds later the CPU provides MA and MB signals to release the shutter lock condi tion by energizing MG1 E 53 Bipolar IC Time chart M SW S tock PCV IN PCV PA lf 10s 2s 2KHz 4KHz 2 Wiring diagram e n the slef timer circuit pattern may be broken or IC may be defective if the AUTO MANUAL and B C circu
19. standard E 163 e Cause for no waveform Locations to be checked when MG1 signal waveform is not observed 1 No waveform of MG1 signal 60 59 17 08 60 e Soldering defective for B P leg No 61 S e Wire breakage between rand R and B P No 60 e No MA or MB signal CPUS9 60 B P 18 17 2 No waveform of MG1 C waveform of MG 1 signal observed by check 1 above e C201 not charged e Q201 not conductive Locations to be checked wnen e MG1 lead wire R broken MGI C W e TE wavetormris not e MG1 C lead wire W broken e Pattern broken on TV circuit boad for MG 1 and MG1 C B P pin No 60 defective e Main cause 1 Q201 deteriorated 2 C201 leg floated up C201 3 MG1 lead wire R disconnected 4 B P leg No 60 broken 5 Trg SW OK e Check in BULB mode C in GND Bipolar IC mo av OO OQ TRG abs TREC TRG 94 C e Shutter is locked at second and later operations when Trg SW is defective In this case PCV sounds lowly Time chart When Trg SW is normal Waveform of Trg signal oc 2V 50ms M SW J Trg MUI Im V Glenw C E 164 e Cause for no waveform 55 C101 Soidered e No waveform of Trg signal e Soldering defective for Trg SW Pattern broken on TV circuit board C lead wire broken or soldered improperly Pattern broken on M circuit board Improper soldering of B P leg No 55 or 56 C101 or RV102 defective bons gt 6 Trg d
20. C201 defective Short land of MG1 C W 3 lead wire to camera body MG1 circuit OK E 169 E 74 E 170 MG1 output OK Output voltage Improper soldering of unchanged pin No 61 170 E 170 No MA or MB signal E 170 m Pattern broken 5 MG1 C output OK Output m E 170 unchanged Improper soldering of E 170 B P pin No 60 E 170 6 RV101 OK RV101 shorted E 171 E 171 IC defective E 171 Vref 1 8V unswitchable E 171 E 75 e Shutter locked at second and later operations Lead wire or pattern broken Trg voitage not vary Trg SW wire broken Trg SW shorted to camera body Voltage on C lead wire 1 Tro OK Trg voltage variable peers E 172 E 172 Pattern broken _ Variable Both output unvariable Improper soldering of B P pin No 55 Trg output and Trg data output voltage variable No Trg output B improper soldering of B P E 173 Pin No 80 or IC defective J 4 ms p Improper soldering of B P No 80 J pin No 37 or IC defective CPU pin No 30 defective Pattern broken E 173 No Trg data E173 B P pin No 37 defective CPU pin No 30 defective 2 Trg data OK Output provided to B P pin No 80 but Trg data not provided E 173 Pattern broken B P IC defective E173
21. Comparator circuit defective IC defective Shutter locked at sec ond operation when program is stopped halfway E 173 E 173 E26 e indication also abnormal e Correct indication 3 Shutter locked in AUTO mode only e B P IC defective See page E 174 4 Shutter locked in MANUAL mode only e B P IC defective See page E 174 77 24 Shutter Kept Open 1 Shutter left open in both AUTO and MANUAL modes Trg SW or related part Trg SW kept ON defective E 176 E 176 E 176 Trg data signa not inputted yet B P pin No 56 defective E 176 R102 broken E 176 Pattern broken E 176 RV102 broken E 176 Trg adj circuit defective Trg data signat provided RV102 shorted to E 175 camera body OK 176 Normal RV102 defective E 177 Integration end sig pattern broken E 177 E177 B P IC defective E 177 H lead wire shorted to camera body E 177 MG2 or related part Q202 shorted defective E 177 H lead wire from MG2 shorted to screw E 177 78 2 Shutter kept open in AUTO mode only M flexibie printed circuit broken E 178 i B P pin No 3 defective E 178 B P pin No 64 defective E 178 B P pin No 80 defective E 178 Pin No 14 or 10 defective bn head amplifier IC E 178 Improper soldering ot C109 or C110 E 178 1 No integral output E 178
22. Digivo Q hould be 02 4 Vref OV Shou RV109 1 C114 shorted or broken ord 2 Pattern broken iN 4 417 2 709 Digivol la Digivol n Should be 02 Should be 40 to 90kf1 60kQ E 201 1 3 15 DAC Adjusting Circuit Defective Adjustment impossible with variable resistor Indication abnormal regardless of accurate matching Other symptoms Check procedures Check of output voltage Vref 1 8 V Check of DAC adjustment with RV108 e Voltage should be varied from O to 200 mV by turning the variable resistor Vref taken as standard 1 Clean or replace RV 108 2 Wire breakage between RV108 and B P leg No 70 3 8 P leg No 70 improperly soldered indication abnormal regardless of accurate matching e Check B P legs Nos 10 11 and 12 e Check CPU legs Nos 4 5 and 6 E 202 a 1 Digo 1 OC Vref check RV108 C114 Digivol D 3 16 Misadjustment of Compensation e t compensation impossible 1 Poor contact on CV contact 2 Check lead wire and pattern 3 CV adj resistor defective 4 RV104 defective e Clean variable resistor If cleaning is ineffective for correcting trouble replace variable resistor with a new one RV104 Quartette resistors E 203
23. P pin No 37 E 166 Improper soldering of CPU pin No 30 or B P pin No 37 Trg signai provided E 166 Waveform rise B P IC defective not bes E166 eile as Integration start Ly provided Trg drive circuit defective 5 Trg data latch signal OK E 166 MG2 signal provided B P IC defective and waveform rise ob served Waveform fall not observed E 166 MG signal not pro vided and waveform Integration end rise observed Head amplifier input system defective E 23 2 Shutter locked in both AUTO and MANUAL modes e Shutter is locked from the first though LCD indication is normal in viewfinder M SW defective M SW OK 1B fead wire broken E 167 E 167 Breakage or improper solder ing of H and Y lead wire No signal to B P E 168 onl nly Q904 or D901a 367 defective Reset circuit E 168 defective E 168 R904 R905 or R132 defective E 168 Wire breakage between collector of Q103 and CPU pin No 49 RS circuit board 2 betes oar No signal to E 167 167 CPU only Improper soldering of i CPU pin No 49 E 167 E 167 Q103 broken E 168 No signal to CPU and B P Breakage or improper soldering of P and E 168 B lead wires E 168 R901 or D901b defective E 168 R lead wire broken E 169 TV joint pattern broker E 169 Q201 defective E 169 W lead wire broken E 169 Flexible pattern for connecting TV broken
24. RV110 shorted to camera body E 184 e IC defective M um E 184 Mechanism defective E 184 3 Shutter speed too high in MANUAL mode only Regenerating capacitor or Q related part defective C104 broken 185 ees E 81 2 6 Flash Circuit Defective 1 Camera cannot be set in flash mode Pattern broken _ M circuit board ineffective B P pin No 47 defective i 0004 1 for switchina to flash mode 186 B P pin No 40 defective CPU pin No 27 detective E 186 M circuit board effective for switching to flash mode Shoe ineffective for switching to flash mode Lead wire K broken on L terminal E 187 U circuit board defective E 187 R701 broken E 187 M circuit board effective for switching to flash mode 2 Charging completion LED not light B P pin No 39 defective E 187 CPU pin No 28 defective E 187 LED not light E 187 Flash LED circuit defective E 187 E 82 3 Strobe not flash Shielded wire broken E 188 Thyristor defective E 188 C103 defective E 189 Narmal waveform observed E 188 R109 R1T10or R111 broken Pattern broken OK p t d Output provided to B P pin No 50 B P pin No 50 defective E 188 E 189 B P pin No 59 defective NO Normal E 189 waveform observed Pattern broken 189
25. Signai checks circuit etc defective 1 Regeneration time circuit 2 Log elongation circut etc defective 2 Troubleshooting Flow Charts 2 1 Electrical System Inoperative e B C circuit shutter and all other circuits do not operate H M P other circuits do not operate Measure voltage across E 95 camera body and terminal Check whether or not 1 8V 50mV is provided as Vref If it is 1 8V 50mV the following checks are unnecessary When this standard is not satisfied check in the sequence of 2 to 7 below Power not supplied to CPU 96 Measure voltage across pins Nos 21 and 46 of CPU 2 Power not supplied to B P E 97 Measure voltage across pins Reset conditions not released e PCV sounds E 98 EPU or RS lead wire G CPU No power and HB output f E 98 Nos 53 and 56 of CPU B P No power and HB input E 99 Measure voltage across pins Nos 21 and 24 of B P Higher than 1 8V E 100 E 56 C404 shorted Nos 26 51 and 62 of B P Check voltage on pin No 43 ot Measure voltage across pins Battery capacity too smail E 95 tead wire of power supply broken E 85 E 96 1 H Pattern broken CPU Improper soldering of pins Nos 21 and 46 E 97 Pattern broken B P Improper soldering of pins Nos 26 51 and 62 E 97 Reset circuit d
26. Synchro Vrerz 1 8V Leet DCO 2V 0 2S GND n BV1 8v3 gt BV2 a BV1 output provided Me Y e Vref standard voltage 200 to 100 mV OK BV output voltage is not provided from head amplifier when BV1 input voltage is 200 mV and invariable depending on brightness b BV2 output voltage provided e Vref standard voltage 30 to 170 mV c BV3 output voltage provided e Vref standard voltage 30 to 170 mV 1 When each BV voltage is not provided Check RV 105 e Check RV 1068 e Check IC leg and pattern of RV106 e Check IC leg RV105 E 137 2 BV2 shorted to terminal Check soldering Check of each BV shorting 3 BV1 shorted to 1 8 V line BV3 shorted to 1 8 V line These troubles occurs rareiy 4 BV3 shorted to RV104 e Soldering shorted between lref adjusting resistor RV104 and SPOT BV adjusting resistor RV 106 RV104 shorted to RV106 Shorted RV106 RV104 E 138 6 Bar Indication Always over ii e Bar indication cannot be lower than YER indication e When shutter operates normally in AUTO and MANUAL modes indicator circuit is defective e Preparations 1 Measuring instruments Digital voltmeter or circuit tester Synchroscope 2 Mode gt AUTO or MANUAL lens should be attached in position 3 LCD should be lit in viewfinder e Shutter dial must not be set at B mecha 1 60 1 Shutter speed normal in both AUTO and MANUAL modes e
27. a Vref lead wire for TV gray shorted to camera body e When shutter is operative with lead wire gray disconnected it was shorted with camera body When the gray lead wire was shorted with power supply no LCD indica tion was provided Bipolar IC b TV lead wire for TV light green shorted to camera body e When shutter is operative with lead wire light green disconnected it was shorted with camera body No indication is provided when a volt age exceeding 2 2 V is applied to TV input terminal c TV lead wire light green for TV shorted to TVAV lead wire purple e When shutter is operative with either lead wire disconnected the lead wires were shorted to each other E117 Vref check Crushed by top cover v yi d Shorted to camera body TV lead wires shorted to each other 2 BV circuit defective e BV3 terminal shorted to terminai 3 System clock circuit defective e LED lights e Resistor for CPU system clock e R114 broken or soldering defective e When shutter is inoperative with no indica tion Set camera in B C mode When LED lights R114 is broken or saider ing is defective e When R114 is shorted shutter is inopera tive though indication is provided E 118 Check of BV3 Check of R114 R114 Shorted 4 Shutter operates abnormally Check of shorting between M SW and camera body e Shutter speed is too high at low
28. board e SW108 e For checking pattern measure resistance with a digital voltmeter should be 02 H OK when SPOT is normal Check contact on SW108 2 When HI LIGHT is not indicated Check the following items e Pattern breakage between D and No 15 e Soldering of CPU No 15 b When indication is still abnormal CPU IC defective E 130 3 SHADOW not indicated e Normal operation in SPOT mode e SHADOW not indicated bar indication im Dionne movable and shutter speed invariable a SHADOW indicated after detaching top cover e Disconnect brown and gray lead wires from top cover e Short terminals with tweezers SPOT should be kept indicated 1 When SHADOW is indicated Check the following items e Wire breakage between top cover and M circuit board e Ucircuit board e SW109 i H i D i NR e For checking pattern measure resistance Ago with a digital voltmeter should be 02 i i C Check soldering Check contact on SW109 H OK when SPOT is normal i Digivol 2 Check soldering of No 14 e C7 14 2 When SHADOW is not indicated C Check the following items e Pattern breakage between C and No 14 e Soldering of CPU No 14 When indication is stil abnormal CPU IC defective b E 131 4 MEMO not indicated e Shutter operation normal l e MEMO is not stored when it is set and held Disconnect a MEMO indicated after detaching top cover e Disconnect brow
29. body Pao Ja i s66 Camera body RV 102 shorted to body 176 e Main comparator defective IC defective e Upon releasing shutter Trg data signa drops from H to L level and rises to H level Then it does not drop to L level Pattern check a 3V Before shutter j After shutter release ES GRIP p TR MS M AR SA OV 1 RV1Q3 broken or contact floated up 2 Pattern broken 3 B P IC defective Digivol la a Pattern check Digivot 2 Check RV103 contact for floating C When normal waveform of Trg data signal is observed e MG2 or related part defective 1 H lead wire shorted to camera body EN qu ed 2 BS On 2 Q202 shorted or broken oye P vM dea PAs we ah 3 Soldering of H lead wire from MG2 shorted to serew H lead wire shorted to camera body Q202 shortec Check shorting between sojder ing and screw E 177 2 Shutter teft open in AUTO mode only Shutter kept open in AUTO mode e Trouble caused when integral input voltae is not provided Main cause 1 Flexible wire broken on M circuit board 2 B P leg No 3 defective broken or impro perly soldered 3 B P leg No 64 defective 4 B P leg No 80 defective 5 Head amplifier 1C leg No 10 or 14 defective Broken at this point e When shutter kept open at low speed 1 C109 or C110 improperly soldered 2 B P leg No 4 or Simproperly soldered Rear of circuit board C
30. displayed e No character or symbol displayed Shutter operation normal Check shutter operation LCD liquid crystal display defective E 104 f LCD defective i i E 104 LC CL or SD circuit and related part defective SD LC CL LCDPW oLCO output provided i6V output not E 113 nprovided to V DISP C302 shorted or wire breakage LCD D circuit defective E 114 R307 shorted CPU Pin Nos 10 11 or 12 de ective Pattern broken between CPU and each rand LC CL SD data output not provied Data of data control E 105 Pattern broken E 111 of B P Pin No 53 E 111 LCD not out l putted from bi singal not outputted polar iC from CPU E 111 E 111 Indication control CPU defective circuit control ET normal No output LC CL SD LCDPW LCD No o output to B P though CPU provides Output provided output 0 E 111 Pattern broken or B P pin No 25 defective E 111 E 59 8 Data contro Output provided NO Pattern broken LCD outputted from bipolar IC Improper soldering of pin No 1 of LCD DIC 112 LCD output E E 112 provided Power Lead wire or pattern supply broken Check wire control breakage E 106 E 108 LCDPW Power supply and outputted lead wire defective E 108 LCDPW not outpu
31. level in i AUTO and MANUAL modes z B C system is inoperative o swo 1 M SW shorted to camera body 1 twain sw e Irritating noise made by film winding Disconnect M SW lead wire black When indication is provided M SW is shorted to camera body Dis connect B 2 Shorting of Q103 E C e Shutter speed too low in AUTO and Check of Q103 shorting MANUAL modes e Shutter locked occasionally e Disconnect Q103 When indication is pro vided Q103 is defective e Check soldering of Q103 E C Note Indication is not provided when trig ger signal is O V low possibility E 119 2 All Items Indicated e All types of data are displayed simultaneously e Almost al types of data are displayed e This symptom is mostly traced to defective LCD D circuit or LCD D IC e Preparations 1 Measuring instruments a Digital voitmeter or circuit tester b Synchroscope 2 Mode a AUTO or MANUAL lens should be attached in position 3 Light LCD indicator e Do not set shutter dial at B or mecha 1 60 1 When shutter operates abnormally in AUTO When shutter operates abnormally when it or MANUAL mode is released in AUTO or MANUAL mode e This trouble is generally unconcelvable CPU IC defective 2 When shutter operates normally e Release shutter and make sure that it can operate normally in both AUTO and e LCD D circuit defective MANUAL modes 1 power line broken e When po
32. or not LCD indication is normal within viewfinder Correct indication first if it is abnormal e For LED and PCV refer to the concerned sections e Disconnect SELF mode lead wire and set camera in the rnode by shorting its land with tweezers 1 SELF mode by shorting with tweezers e CE circuit board or related part defective 1 R or M lead wire broken 2 SW104 defective When camera is inoperative after setting it in l SELF mode by shorting with tweezers 1 Pattern broken 2 CPU leg No 26 improperly soidered 3 CPU IC defective When camera is operative after setting it in Check of CE circuit board Set in SELF mode Pattern broken Location to be checked for breakage 26 Must be continuous PA AS mae r N r LAM 4 Y A 5 si a E 196 3 11 LED not Light e Check whether or not LCD indication is normal When LCD indication is abnormai correct it first 1 All LEDs not light Check in 1 e Reset circuit defective 1 C901 shorted or broken 2 Q902 or Q903 broken 3 Q901 shorted or broken 4 R902 or R903 broken 5 C lead wire broken 6 Pattern broken 7 B P leg No 42 improperly soldered 2 LAMP and FLASH LEDs not light e W lead wire broken or improperly soldered 3 LAMP LED only not light Lamp not light w Leg No 32 1 Lamp defective 2 A lead wire broken 3 Q105 broken 4 R119 or R416 broken 5 Pattern br
33. 109 3 Shutter left open in MANUAL mode only Pattern check When indication is abnormal correct it first 2 Refer to LCD Indication Abnormal 4 e When indication is normal 1 C104 shorted When shutter is closed after disconnecting C104 it is defective C104 sharted 2 Pattern broken 3 B P leg No 44 improperly soldered bise 4 RV101 broken or improperly soldered for check 5 B P leg No 45 improperly soldered Idering defective Pattern check E 178 3 5 Shutter Speed Too High Check indication whether or not it is normal When indication is abnormal correct it referring to LCD indication Abnormal Therefore check on a premise that indication is normal e Preparations 1 Measuring instruments Digital voitmeter or circuit tester Synchroscope storage 2 Mode AUTO or MANUAL 3 Replace shutter for checks 1 Shutter speed too high in both AUTO and MANUAL modes 1 MG signal observable e Check with a synchroscope Cour Waveform of MG2 signal Bipolar IC Ed in GND Time chart M SW NEN Comparator 7777777 MG2 c P m 4 Integra si N Waveform of MG2 signal DC 2V 20ms e if a synchroscope is not available disconnect B H lead wire With H lead wire shorted to E camera body release shutter When shutter speed is still too high MG2 or related part is defective See the next page EE amenna 02 WOE 2 Tess ed VON ZOsn E 179
34. 18 MG1 Charging Circuit 1 Circuit diagram e Checking procedures 1 Measuring instruments Digivol or circuit tester l Shycroscope 2 Mode AUTO or MANUAL o Release the shutter Bipolar IC CPU 48 OSC P1219 PI3 60 aV fA LCO PW MGII6I PNP 3 F coOMARGEIGO C201 100y 2 Wiring diagram e Charging of MG1 1 Upon completing photographing com parator OFF C201 is charged for 100 ms as preparation for the next photo graphing e Check valtage waveform with a synchro EOM scope C201 1 Release the shutter to allow the mirror to go down 2 Then the charging is started Waveform of MG1 C Time chart ON TT NN 1 Integration start 4 E Comparator MEE 100ms MG1 C DC 2V 50ms Trg E 45 19 Flash Control Circuit 1 Circuit diagram 2 Wiring diagram e Flash control circuit 1 When the switch is turned ON on the flash a weak current flows to the L terminal Then the bipolar IC sets pin No 40 at the _H levei and transmits H signal to the CPU pin No 27 Upon receiving the H signal the CPU sets the camera in the flash mode The CPU judges whether or not the shutter speed exceeds 1 60 When the shutter speed is 1 60 or lower the strobe flash circuit and light control cireuits are energized As a res lt each circuit of B P is energized by OA OB OC signal l Completion of the chargin
35. 27 improperly soldered Check of flash x1kQ fee Circuit testeri ITE f black red Cord with ej Los s L terminal 1 K alligator connector i Shielded wire ame o TTL body Gan nom I9 ret EX EZ stes Ni T2 Check of flash red black x1kQ Leg No 47 E 186 b Camera can be set in FLASH mode with M Check of L circuit board circuit board Top cover or related part defective 1 L terminal lead wire K broken 2 U circuit board defective 3 R701 broken Must be continuous L terminal L terminal 2 Charge completion LED not light Check of charge completion LED e Check procedures x1000 1 Set circuit tester at x 1002 range 0 6 mA Must be continuous Circuit tester 2 Connect black and red tester rods to camera body and L terminal respectively 3 OK when LED lights e Premise Camera is set in FLASH mode at the preceding step Red Black 39 Camera body When LED not light 1 Pattern broken between B P leg No 39 and CPU leg No 28 2 B P leg No 39 improperly soldered 3 CPU leg No 28 improperly soldered 4 Flash LED circuit defective See LED indication abnormal on page E 197 E 187 3 Strobe not flash e Check procedures 1 Observe waveform on a synchroscope 2 Check waveform on B P leg No 50 or Q101B Release shutter with flash attached in position power SW ON and check wav
36. Check of MG2 A When normal waveform is observed e MG2 or related part defective 1 MG2 or H lead wire broken e Disconnect H lead wire e Detach cover e Check continuity Resistance should normally be 6002 ovo o Disconnect 2 Check H lead wire and pattern Check of pattern and lead wire e Check continuity Check B lead wire and pattern e Check continuity B 3 Q202 broken or defective Check of Q202 and C202 e Release shutter with emitter and collector of Q202 shorted to each other When shut E ter is kept open Q202 is defective e For strict confirmation disconnect and 8 check Q202 i s 4 C202 shorted or defective Q202 e Release shutter with C202 disconnected e When shutter is kept open C202 is shorted C C202 E 180 B When normal waveform is not observed e Check whether or not trigger data signal is provided Release shutter at a low speed in MANUAL lor AUTO mode Normal waveform at 1 8 in MANUAL mode E Approx 117mS 1 When normal waveform of trigger data is observed a B P leg No 57 improperly soldered b Pattern broken c B P IC defective 2 When waveform of trigger data is n ed e MG2 and related circuit OK e Shutter mechanism or B P defect E 181 Check of trigger data waveform Shychro DC LL M GND n Check in 1 Digivol a M SW chattering e Check with a synchroscope e Normal waveform
37. D D or LCD defective Shutter inoperative in MANUAL mode and bar indication invariable with F stop ring e Data input circuit defective e TV AV misadjusted IC pin No 71 or 72 defective Bipolar IC Check soldering of pin No 71 IC O2 UR 300 Check soldering of pin No 72 E 144 Bar indication invariable with ASA e When shutter operation is normal indica tion circuit is defective e Bar indication variable with exposure compensation In this case data input circuit is defective IRIS3 3401 Poor contact Wire breakage LLL e When bar indication variable with exposure compensation but invariable with ASA 1 Poor contact on ASA contact 2 Pattern No 68 broken Bar indication invariable with exposure com pensation e When shutter operates normally indication circuit is defective e When bar indication is variable with ASA normal data input circuit is defective Wire breakage Poor contact 1 Poor contact on exposure compensa tion contact Pattern No 67 broken Orange lead wire broken QM E 145 Resistance should be variable with compensation Conductive part Resistance part Digivo 2 aed Poor contact Resistance should be variable depending on ASA Digvol in i i Digivol g Poor contact 7 Bar indication invariable with ASA or exposure compensation e When shutter ope
38. L 2 4V levels respectively to turn ON the thyristor for flashing Upon flashing the integrator 7 Upon receiving the flashing compensation signal is set at signal the CPU actuates the the H level and integration OVER UNDER exposure cir start is informed from 8 P cuit at the next stage pin No 80 to the head m plifier Upon flashing L terminal current is stopped and B P pin No 40 is set at the L leve to inform the flashing to CPU pin No 50 E 48 8 Upon completing the integra tion the comparator is inverted and the light control circuit at the preceding stage operates to stop the flashing Flashing circuit voltage Integration compensa tion signal Check procedures 1 After detaching the top cover connect the lead wires necessary for flashing the strobe 1 Pink lead wire 2 Light green lead wire 3 Shielded wire 2 Attach the strobe to the top cover 3 Bring the measuring terminals of a synchroscope into contact with the measuring point 4 Flash the strobe by releasing the shutter 5 At this time measure voltage with the synchroscope Trigger data signal GND in 1 Each Trg signal provided Waveform of Trg signal Time chart DC 2V 10mS 55 Trg ERN i 1 Trg data Trg 37 Trg data 112 5ms Integration l compensation 80 Integrator signal compensation Trg l Time chart of X SW ON signal 2 X SW ON signal and flashing signal
39. LIGHT 08 Foe o o no f 5 1 1 5 55530292 59299224F9 5 Shutter speed is indicated in AUTO mode e Dot is indicated e HI LIGHT is indicated e All items are indicated faintly E 122 e R302 and R304 broken improper soldering Definite point mark SPOT HI LIGHT a N Vo ALzSUAVRNOU DNI Ve EV S PESOS sase SHADOW All shutter speed AUTO i eR REPERTUS ig CREE rer Roa TER RUE ERE e SPOT HI LIGHT and SHADOW indicated rather clearly e All items are indicated faintly f R301 and R304 broken improper soldering e All items are indicated 2 Power supply shorted to resistor or broken a Power supply line and R301 broken improper soldering SHADOW e All items are indicated faintly e Dot bar SHADOW are indicated cleariy 8 SHADOW e All items are indicated faintly e Bar and SHADOW only indicated clearly 3 Normal operation in AUTO and MANUAL modes e Necessary items are dark and not clear e All items are indicated faintly 4 Indication variable upon mode switching e Indications are very dark b Power supply and R302 broken or soldering defective e Necessary items are indicated clearly e All the other items are indicated faintly c Power supply and R303 broken or soldering defective e Necessary items are indicated clearly Alt the other items are indicated faintly E 123 5 Examples of other symptoms 1
40. O or MANUAL lens should be attached in position 3 LCD should be lit in viewfinder e Shutter dial must not be set at B or mecha 1 60 When shutter operation is normal in AUTO and MANUAL modes e In this case indicator circuit LCD D or LCD is defective Check indicator circuit e When indicator circuit and shutter are normal CPU IC defective Check of pattern breakage Digvo g Sena MUSS Bar Indication invariable with F stop ring only When shutter operates normally indicator circuit is defective When auto EE adjustment is abnormal e Data input circuit defective e Check continuity of A B and C res pectively l A B ICO CIR 30100 indicates resistance below several ohms E 142 3 Bar indication invariable with shutter dial 1 When shutter is normal in MANUAL mode e indication circuit defective Pattern check Digivol 2 When shutter speed is abnormal in MANUAL j mode e Data input circuit defective e Check continuity of each pattern and lead wire A 8 Bipolar IC wam ICO 18 3000 Digvo Q e TV circuit board must be continuous to M circuit board resistance below several EE ohms IO MA ELT a di 2 Ej a TV AV IM Vref Al TV K E 143 Bar indication invariable with F stop ring or shutter dial When shutter operates normally in AUTO and MANUAL modes e Indicator circuit LC
41. R302 shorted and R304 broken 2 OVER Symbol in MANUAL mode UNDER MEMO S HP Ras VY dea re bzw saree d ac odes a aom iy 0187 Que OL Serer iene ena Numeric AUTO i Caa Na a REN a T ta So RR OVER UNDER and MEMO are indicated faintly Dots are indicated at every third positions as shown above R302 broken and other troubles Symbol MANUAL MEMO HI LIGHT i ae TT ses G i Numeric AUTO i RENE MODERNER SERERE oe ee ee es e Dot e is indicated e and 4 are indicated e HI LIGHT and MEMO are indicated faintly E 124 nm 2 3 4 Improper soldering of LCD D IC Leg Improper soldering of IC leg No 7 e Same symptom as that caused by broken R303or R304 improper soidering of IC leg No 8 e Same symptom as that caused by broken R302 or R303 Improper soldering of IC leg No 9 e Same symptom as that caused by broken R301 or R302 Improper soldering of IC leg No 10 e Indication normal e However necessary items are not so clear and all the other items are indicated faintly Power supply line broken e Ail items are indicated or e Necessary items are not clear and al the other items are indicated faintly Indication faint and unreliable LCD D IC defective e IC is defective when LCD D Circuit is normal LCD defective e Replace LCD E 125 4 Some Items are Not Indicated Too Faint e Lack of some indication i
42. RV104 BV1 B P 77 or BV3 B P 79 shorted to 1 8V line E 67 6 Bar indication always oven e Indication circuit is defective when shutter operates normally e When shutter operation is also abnormal perform the following checks ITV AV circuit TV K shorted to 4 defective terminal E 139 E 139 Each lead wire shorted camera body Body A H D ey CV SV circuit defective M E 140 9 Bar indication apt to be over E 140 terminal shorted to BV BV or BV B P 77 78 or 79 3 BV level converter circuit defective Trouble occurring rarely E 140 140 4 BV output too high Head amplifier or E At least 300mV higher than standard of 1 8V related part defective E 68 7 Bar indication unchanged with data input e indication circuit is defective when shutter operation is normal e When shutter operation is also abnormal perform the following checks Lead wire or pattern broken AV contact defective E 142 Lead wire or pattern broken E 143 Bar indication unchanged with AV E 142 Bar indication Junchanged with TV TV circuit board defective E143 143 TV contact defective E 143 TV AV pattern or lead wire broken Bar indication unchnaged with TV or AV Imporper soldering o B P pin No 71 or 72 E 144 ASA contact defective E 144 4 Bar indicatin E 145
43. SA 320 to 3200 C109 C110 C111 or B P No 4 5 or 6 is improperly soldered Chattering of main SW e See page E 182 C112 phase compensating capacitor floated up Head amplifier defective e See page E 151 E 193 3 8 Regeneration Time Abnormal e When indication is abnormal correct it first referring to LCD Indication Abnormal 1 1 8 sec adjustment impossible in MANUAL mode e RV101 defective Replace 2 1 2000 sec adjustment impossible in MANU AL mode e C101 improperly soidered 3 R1020r RV102 defective e Resistor constant wrong 4 Chattering of Trg SW e Chattering causes instability at high speed e See page E 182 5 1 500 and 1 1000 negatively deviated e Mechanical trouble z Slight positional deviation between 1st and 2nd curtains c Readjust curtain positions E 194 C101 R102 RV101 3 9 Malfunction of B C System Malfunction of B C circuit 1 Camera cannot be set in B C mode PCV does not sound and LED does not light 1 W lead wire broken 2 Poor contact on SW105 3 CPU leg No 25 improperly soldered Check for Vref 1 8 V If not circuit misadjusted Adjustment of B C circuit Set stabilizer at 2 65 V and turn lock adj RV 109 as to obtain Vref 1 8 V For LED and PCV refer to the concerned sections See page E 197 199 Battery chamber Ga Digivol oc 1 8V E 195 i 3 10 Malfunction of Self Timer e Check whether
44. When program stops halfway shutter is locked at the second and later operations E 173 B Indication also abnormal System clock circuit or data input circuit defective e in this case data input circuit is also defective e Correct indication referring to LCD Indication Abnormal Reference 1 System clock circuit defective e R114 broken or shorted e See page E 118 2 BV circuit defective e 8V3 shorted to terminal e See page E 118 3 TV AV circuit defective 1 H lead wire shorted to camera body 2 K lead wire shorted to camera body 3 G lead wire shorted to camera body 4 K and M lead wire shorted to each other e See page E 117 4 CV SV circuit defective e D lead wire shorted to camera body 5 For other symptoms refer to Electric System Dead e See page E 95 3 Shutter locked in AUTO mode only e B P IC defective 4 Shutter locked in MANUAL mode only e B P IC defective E 174 3 4 Shutter Left Open Check whether or not indication is normal When indication is abnormal correct it referring to LCD indication Abnormal Preparations 1 Measuring instruments gt Digital voltmeter or circuit tester Synchroscope storage AUTO or MANUAL Release shutter for checks 2 Mode 3 Others f a XD 1 Shutter Left open in both AUTO and MANUAL modes e Trg data signal provided Check procedure Observe waveform on trigger rand of CPU Wavef
45. ad wire broken or improperly soldered 3 R906 or D901 defective 4 B lead wire broken or improperly soldered E 168 3 Check of MG1 circuit Check of MG1 Check MG 1 circuit whether or not it is normal e Check procedures Camera in wound condition Short MG1 R lead wire rand to power suppiy with tweezers MG1 OK when it is energized with a click scund MG1 ON e When MG1 is not energized e Short MG1 C W lead wire land to body with tweezers 1 When MG1 is energized with a clicking sound R lead wire broken or improperly solder ed TV connecting pattern broken Q201 defective Pattern broken 2 When MG1 is not energized Check MG1 C circuit a Short side of C201 to camera body When MG1 C MG1 is energized with a clicking sound W lead wire broken or improperly solder ed TV connecting pattern broken b When MG1 is nat energized Check voltage of C201 It should normally be 3 V Ww EA Be Check MG1 for wire breakage ye Resistance should normally be 50 Sal w e Mon afe SS a a i fei e 500 rs CE qu v ox m2 CO en _ _ C201 E 169 4 Check of MG1 output voltage Output voltage e Voltage variable on land of MG1 DC aver d e Check procedures camera in wound condition 1 With shutter kept in locked condition short land R of MG1 to Vref 1 8 V CF OK when shutter is released with a click e 777 AS in
46. are obtained LCD is normal Camera body When no indication is obtained LCD is defective Check rubber connector 2 Positional deviation 2 Rubber connector broken Short E 104 2 Check of SD CL and LC signals INTA 149 m3 Pa2 u n2 008 i i e ge z a 1 uz s ie 300 LCD D in GND B 1 LC A Observe waveform on a synchroscope e F M e Waveform should normall be as illustrated below When waveform is Check iegs No 10 11 and 12 for soidering on CPU OK CPU IC not as shown below Check patterns between CPU and each land defective e Waveform is normal Waveform of LC Waveform of CL 2V Q 5ms 2V 50uS Waveform of SO oC 2V 50uS E 105 3 Check of LCD POWER AND eLCD ynchro S Digivol j DC B e LCD POWER Normally 2 4 to 2 6 V When output is not provided Check output from CPU e oLCD waveform is as shown on the right side below OK When output is not provided Check o signal from CPU It is permissible to measure voltage by using a digital voltmeter in place of synchroscope DC 1 V to 2 V OK Standard 1 3 V LCD waveform 1V 20uS Ce o v OY Fr wks sid E 106 4 When LCD POWER and LCD output are provided in addition to SD CL and LC outputs Check SD CL and LC circuits e Check lead wires CPU INTA 191 mas 542 oes 42 08 OOS unuziux Ke 30 0 LCD D Check each lea
47. ata latch circuit OK GND called also CPU Trg Synchro e Select BULB mode for checks lin nn TRG DATA OU TRG e No external circuit connected e Shutter is locked at the second and later opera tions when Trg datalatch circuit is defective Time chart When Trg data latch circuit is normal Waveform of CPU Trg signa M SW 50mS Trg SW N l MG2 lenz i i CPU Trg ee m ESETA E 165 e Cause for no waveform e No waveform on CPU Trg a No rise of waveform 1 When Trg signal waveform is observable e Pattern broken between CPU30 and B P 37 e IC leg improperly soldered CPU30 B P 37 e B P IC defective 2 When Trg signal waveform is not observable e Trg drive circuit defective b No fall of waveform 1 When MG2 signal is provided When rise of waveform is observable e B P IC defective latch circuit defective 2 When MG2 signal is not provided shut ter kept open When rise of waveform is observable e B P IC defective comparator e Input stage of head amplifier defective Check output of head amplifier See page E 151 Check pattern for breakage Digivoi n Waveform of Trg data Integral time e a Trg i data i f Rise Fal E 166 2 Shutter locked in both AUTO and MANUAL modes Check with a digital voltmeter A When indication is norma Check of M SW 1 Shutter locked from the first though indica tion n
48. cre tel GND EE DC r Voltage waveform on X contact DV V S pee 3 When normal waveform is not observed gt P lead wire broken gt Pattern broken C203 shorted or broken gt X SW contact defective 3 When input waveform is normal on B P leg No 59 but no waveform is observed on leg No 50 B P IC is defective P Check in 3 E 190 4 Light control impossible TTL central controi ineffective Flash operates normally Camera must be set in FLASH mode Strobe flashes normally When light control does not operate in the con ditions mentioned above 1 Flash gives full light e Check procedure Disconnect TTL lead wire P and short it to power supply a When flash gives full light 1 U circuit board defective 2 P lead wire broken b When flash gives low light 1 Q102 shorted or broken e Short base and emitter of Q102 for flashing gt Q102 is defective when strobe flashes normally 5 Q102 is OK when strobe gives full light 2 Wire breakage between B P leg No 48 and land for P lead wire 3 B P leg No 48 or 49 improperly soldered E 191 nonunuo2 Check of fuil light flashing Must be continucus iP Short for flashing Disconnect C collector B base c Check waveforms on B P legs No 48 and Check of outputs on legs No 48 and No 49 No 49 Normal waveforms 1 Leg No 48 l Synchro H n GND id P
49. d wire for soldering and breakage e Check resistance between patterns e Resistance should be OQ Wire broken when resistance is some scores of 1 A A 2 Y Y ohms 3 G G e Check LCD D IC legs Nos 11 12 and 13 for soldering 1 e Check of IC legs 2 e Check of patterns No 13 E 107 8 When LCD POWER is not supplied from bipolar C a Lead wire broken pattern broken or soldering RR T acK pattern M 54 defective C Bipolar iC Check lead wire ie e 02 OK 2 e Some scores of ohms NO soldering b Check pattern and lead wire of power supply c LCD PW outputted from CPU E Check pattern of power supply terminat N 4 d t e DC3V OK e When DC voltage is O V CPU IC defective 1 B 54 CPU output 2 b 23 B P input E 108 d No bipolar IC input e When CPU output is available 1 Check pattern for breakage 2 ON OK lt Some scores of ohms NO 2 CPU No 54 or B P No 23 soldering defective 3 When above checks detect no abnormali ty B P IC defective Check No 54 for for soldering USES S Check No 23 LLL d i i i igvol Q for soldering Check pattern E 109 LCD POWER 6 When output provided from bipolar IC 2 4 to 2 6 V a Pattern broken jam Nga Check pattern and soldering
50. dicated No H LIGHT indication CPU pin No 15 defective CPU defective E 130 Wire breakage between top cover and M circuit board m pos U circuit board defective SHADOW indicated E 131 ee SW109 defective E 131 After detach ing top cover Pattern broken between ee C and pin No 14 SHADOW eu 131 indi No SHADOW E 13 not indicated a aua CPU Pin No 14 defective 131 E131 i CPU defective E 13 Wire breakage between top cover and M circuit board U circuit board defective MEMO indicated SW112 defective Detach top cover and set made Pattern broken between Y and pin No 18 MEMO not MEMO not indicated indicated E 132 E 132 CLR normal E 132 2075 E 132 CPU defective 132 E 65 Apply positive voltage to LCD defective LCO D pin No 60 OK E 133 when all items are indicated OK when indication OK EGO D defective in other modes E 133 LCD D iC pin No 16 OK when output from pin 20 or 54 defective Nos 16 20 and 54 is 3V E 133 or higher Strobe Over Under not indicated CPU 1 Improper soldering of Leg 1 2 or 3 broken B C system and self timer operate normaily E 133 fecti OK when ail items are LCD defective indicated by applying positive E 134 indication circu voltage to LCD D pin No 60 eda defectiv
51. dy 3 V or higher with LCD attached OK e When indication circuit OK b Check whether or not B C system can operate normally and PCV sound is switch able from 2 kHz to 4 kHz in SELF mode 1 When B C mode cannot be set and PCV sound is not switchable in S LF mode e CPU leg No 1 2 or 3 defective or pat tern broken 2 When B C normal and PCV sound normal iin SELF mode CPU or bipolar IC defective Check continuity E 133 6 OVER exposure shutter time not indicated EE accuracy satisfies standard e Normal operation in MANUAL and AUTO modes 1 Pattern check e Indication circuit normal e Check whether or not LCD is normal Apply positive voltage to LCD D No 60 OK when all items are indicated LCD D normal OK when other two or three items are indicated e Check LCD D IC leg and pattern for defect and breakage Output provided to IC pins No 16 and No 55 At least 3 6 V At least 3 V with LCD attached in posi Camera body tion ir e When indication circuit Ok I CPU IC defective Short to indicate ali items E 134 5 Bar indication Not Provided Bar indication fixed on low luminance side When shutter operates normally accuracy satisfies standard in AUTO and MANUAL modes indication circuit is defective e Preparations 1 Measuring instruments Digital voltmeter or circuit tester gt Synchro scope 2 Mode AUTO or MANUAL lens should b
52. e OK when indication OK i E134 in other modes E 134 improper soldering of Shutter time OVER OK when output from pin EE pin No 16 or not indicated Nos 16 and 55 is 3V or E134 E 134 higher CPU IC defective CPU IC defective when indication circuit is OK E 134 66 5 Bar indication not provided e indication circuit is defective when shutter operates normally e When shutter operation is also abnormal perform the following checks TV AV circuit defective Shutter speed indication remains at 1 2000 135 and cannot be changed in MANUAL mode M shorted to power supply E 135 Shorting between H and A lead wires H shorted ro 2 power supply CV SV circuit defective Lead wire defective when bar is indicated after E 136 disconnecting each lead wire E 136 A shorted to power supply E 136 BV level converter circuit defective OBV input provided See page E 151 E 136 3 Check BV input 7 input applied to B P r f P Measure BV voltage lag No 7 Head amplifier E 136 for simple epok NO defective See page E 137 E 136 RV105 or 106 defective B P Pin No 77 78 or 79 defective Pattern broken between B P C leg and RV106 E 137 BV2 B P 78 shorted to termina E 137 BV level converter cit cuit defective BV input provided E 137 BV3 B P 79 shorted to
53. e form Check flashing Normal waveform H 3V Flashing start 3 If a synchrascope is not available short Q1018 to terminal of Vref 1 8 V When f Flashing signal normal strobe flashes external flash circuit is OK f DV vo S i Vref 1 8V B P 4 Short D rt c6 TIRSA sa aes ano 03 E mrt 390 1 arg EAE cos 225 coc 1 Strobe not flash with normal waveform e External flash circuit defective 1 Shielded wire broken Check with a circuit tester 2 Thyristor broken Connect and terminals of a dummy battery 3 V to K and G respectively of thyristor Thyristor is OK when strobe flashes Thyristor is defective when strobe does not flash DC w E 188 2 3 Voltage applied to C103 Should normally be approx 3 V When voltage is not applied R109 R110 or R111 lead wire broken Check C103 Disconnect and check Q101 for short ing 4 Pattern broken Check for breakage between B P leg No 50 and Q1018 5 B P leg No 50 improperly soldered Normal waveform not observed on B P leg No 50 or Q1018 1 Check voltage waveform on soldering of pattern for X contact lead wire with a synchroscope Normal waveform 2 When normal waveform is observed c B P leg No 59 improperly soldered Pattern broken E 189 When no voltage is appiied to C103 Q101 R109 Shorted in a a J
54. e B C mode the CPU outputs OA OB and OC signals for battery check i When voltage is tower than the lock voltage of 2 65 V all the circuits other than the CPU are deenergized Further H signal is outputted from pin No 42 of B P to extin guish the MEMO and SELF LESs When power supply voltage exceeds 2 75 V pin No 38 of B P is set at the L level to emit L signal to pin No 29 of the CPU When pin No 29 is set at the L level the CPU sets pin No 34 at the H level to emit H signal to pin No 36 of B P When pin No 36 is set at the H level pin No 41 is set at the L level to light the B C LED E 51 5 Simultaneously the CPU sets pin No 58 at the H level The H signal is transmitted to pin No 19 of B P to turn ON pin No 52 of B P When pin No 52 is set at ON o signal from the CPU is processed by B P and outputted from pin No 52 to sound the PCV 7 When the voltage exceeds the lock voltage and lower than 2 75 V the CPU turns ON and OFF pin No 34 and No 58 to flicker the LED and sound the PCV intermittently e Adjustment of B C voltage lock voltage 1 The B C voltage can be adjusted in the procedure similar to that for adjusting Vref 1 8 mV l 2 Turn RV109 until pin No 75 of BP is set at 18 V 50 mV 2 Wiring diagram gs zm M oc B C mode Waveform of PCV output 2K Ww B C mem Synchro 2KH B C mode position LED output gli J bos W
55. e attached in position 3 LCD should be kept indicated e Shutter dial must not be set at B or mecha 1 60 e When shutter operates also abnormally 1 TV AV circuit defective e TV AV lead wife purple shorted to terminal e TV value fixed at 1 2000 e When indication is provided after discon necting lead wire lead wire purple short ed Shorted E 135 CV SV circuit defective Shorting between gray and blue lead wires Gray lead wire shorted to blue lead wire e Check soldering CV lead wire gray shorted to terminal EE adj 2 lead wire blue shorted to terminal l e Disconnect each lead wire When indication obtained the lead wire is shorted e 2 and 3 above are rather rare gt BV input provided BV1 voltage BV input e For simple check measure BV voltage It should normally be within a range of 200 to 100 mV e When input voltage is not provided check voltage on pin No 7 of bipolar IC e When no input voltage is not applied to C pin No 7 Head amplifier or related part defective See page E 151 GND ini When i i i lied to IC pin N Synchro e i en input voitage is appiie to pin NO i ynchro BV level converter circuit defective See next page BV input D 5 JEn e EEN SS 7 z a ue E 136 amp BV level converter circuit defective e When BV input voltage is provided from Check of each BV voltage head amplifier in nli
56. e is 3 V OK e When DC voltage is O V 1 Check C No 21 and No 24 for soldering 2 Check pattern for breakge 2 00 OK 2 Wire broken when resistance exceeds some scores of ohms u e L 21 Check HB across No 56 POWER HB and No 21 z Check power across No 53 and No 24 E 99 7 Vref 1 8 V outputted e Check Vref when POWER and HB are inputted WIN Ye ere lis PTT VS qu de HE sara IPT i 12 UR 3000 e 1 8 V OK e Vref exceeding 1 8 V NO e Vref lower than 1 5 V NO e When Vref exceeds 1 8 V 1 TV AV circuit Each lead wire shorted to camera body PCV sounds during mode switching E H Ei M G d Check each lead wire for shorting to camera A body K GA Q Shorted to camera body auem b 2 B P IC defective z When not shorted to camera body E 100 e When Vref is O V 1 Vref adjusting circuit normal 1c02 iA 300 EE ed Sus oe e 0C0 5 Vorhigher OK e When DC voltage is O V a Variable resistor contact or soldering defective gt Check variable resistor contact for poor contact with circuit tester Resistance should be Ot Resolder Check soldering Should be 02 Soldering defective b No 76 or soldering defective on bipolar IC Poor contact c Pattern broken Check 76 soldering C102 UR 3000 75 e oc 4 Should be OQ Wire broken when resis
57. e of Front surface of Circuit board circuit board C108 R124 Several ohms or lower OK E 155 b Terminal of R125 shorted to conductive plating e Bar indication fixed on low luminance side Improper soldering of No 18 c Improper soldering of head amplifier IC pin R125 shorted to conductive plating No 18 e Bar indication fixed on low luminance side d R124 broken or soldering defective e Bar indication fixed on low luminance side e Other symptom can be traced to defective head amplifier IC Improper scidering of R124 broken or soldering defect ve R124 improperly soldered or broken Head amplifier circuit E 156 2 No operation EE accuracy low in DIRECT HB check AUTO mode Abnormal switching of indications and ex posure time a Check whether or not HA and HB signals are provided from CPU e Simple check HB Output of 1 8V should be obtained by switching of 1 8V 1V HA Voltage across BV3 BV2 in B C mode should normally be 0 mV in average Digivol OC 25 mV by spot light measurement 1 8V during indication 1V during exposure HA check HA check i Digivol DC OmV in average 25 mV by spot light measurement Mode B C Voltage checks on IC pins Nos 55 and 56 e When the simple checks do not indicate normal values check voltages on CPU IC pins Nos 55 and 56 Voltages in average light measurement HA 3V on
58. efective B P IC defective Shorting between C902 and power supply E 98 CPU Improper soldering of pins Nos 53 and 56 E 99 CPU IC defective E 99 B P Improper soldering of pins Nos 21 and 24 Pattern broken E 99 TVAV circuit Shorting be tween lead wire and camera body 8 P IC defective E 100 8 9 Vref 1 8V No signal output Higher than 1 8V OV E 100 101 Oscillator circuit defective e First shutter Kept open and then locked LED lights in the BC mode E 57 Vref adjusting circuit defective Variable resistor contact defective Pin NO 76 of amp P defective Pattern broken 101 C114 shorted Pattern broken B P pin No 75 defective Vref blue lead wire shorted to terminal E 102 No output from Vref pin o 75 B P IC defective E 103 Crystal oscillator defective Pattern broken C106 or C107 defective 2 2 LCD Indication Abnormal e Diagnosis flow chart for abnormal indication All indications abnormal Indication abnormai E104 Bar indication abnormal a No item indicated E 104 Ail items indicated Indication unreliable Some data not indicated E 126 E 135 Bar indication oV R E 139 Bar indication Unchanged by inputting data E 142 Bar indication blinks E 148 1 No item
59. f PCV Bond PCV to front plate with Aron Aipha th PCV or Araldite u LJ 2 PCV not sound 1 PCV SW defective 2 G lead wire broken 3 B P leg No 25 defective 3 PCV sounds at short intervals in SELF mode 1 A and R lead wires shorted on CE cir cuit borad E 199 3 13 Reset Circuit Defective e LED lights for a very short time when reset circuit is activated by turning mode selector lever e Reset function is ineffective 1 Reset function ineffective upon mode switch ing 1 C902 broken 2 Lead wire broken black orange or green 2 Auto reset function ineffective 1 C105 shorted or broken 2 B P leg No 43 or 27 improperly soldered 3 Pattern broken 3 Both reset and auto reset functions ineffective upon mode switching e LED extinguished normal e CPU leg No 43 improperly soldered 4 Flash LED MEMO and B C LED light upon mode switching and auto reset 1 C901 broken or improperly soldered 2 C lead wire improperly soldered E 200 Check in 1 3 14 Reference Voltage Vref Abnormal 1 Vref 3V 1 Gray lead wire of AV shorted to camera body 2 Blue lead wire of TV shorted to camera body 3 R129 shorted or broken 2 Vref 23V Check in 2 3 or 4 e Triplet resistors or related part defective Should be 02 omer Ja 3 Vref 1V Triplet resistors or related part defective Should be 100 to 150kf1 120k
60. g is informed from pin No 39 of the bipolar IC to pin No 28 of the CPU The flash LED is lit H TTL Operation check Simple method 1 o 2 o To set the camera in the flash mode With a circuit tester set at a range of X 1KQ connect it between the L terminal and camera body as shown above A current of scores of microamperes to 400 microamperes should flow A certain type of circuit tester allows higher current to flow In such a case connect a suitable resistor to limit current within the range specified above Select the AUTO mode and attach the body cap to the camera Release the shutter When the shutter operates j about 1 60 sec the camera is normally set in the flash mode Charging completion signal provided Set the circuit tester at the X 1002 range The flash LED should normally light Measure voltage on the LED with a digital voltmeter It should normally be 3 V e Current should be flowed for a moment only for lighting the flash LED with a circuit tester E 46 20 Light Control Circuit 1 Circuit diagram Bipolar IC 16 15 14 2 Wiring diagram GND in e Light control circuit 1 The CPU provides light control ON signal OA OB OC when shutter speed is 1 60 or lower or light control OFF signal when shutter speed exceeds 1 60 When the light control ON signal is provided H 3 V is outputted to TTL and L 2 4
61. g sound SH SS A Man A Dba X ww Vref 1 8V 2 Check voltage on land R of MG1 Short x 26V 25V OK Release shutter at low speed Must be continuous e Voltage invariable 60 07 1 Pattern broken 2 B P pin No 61 improperly soldered 3 No MA or MB signal from CPU MA 0 5 V MB 0V EA pres Check CPU iegs No 59 MA and No 60 MB pattern 5 Check of MG1 C output voltage e Check procedures e Check voltage on W of MG1 C OV 23V l 7 Check voltage variation while releasing shut ter at low speed e Voltage invariable 1 Pattern broken 2 B P pin No 60 improperly soldered e See 3 2 a on the preceding page Check pattern E 170 6 RV101 shorted Check procedures gt Check voltage of 1 8 V 1 V on land When M SW is turned ON gt 418V 1V OK Ov RV101 shorted 7 No switching of 1 8 V T V on terminal when M SW is turned ON e 1 8 V is not switched to 1 V after turning ON of M SW e IC defective E171 2 Shutter locked at second and later operations After resetting camera shutter can be released normally at the first operation but locked at the second and later operations e This symptom to halfway stop of the program e This symptom is traced to a trouble in MG 1 drive circuit or later stage 1 Check of Trg a Trg voltage variable e Check procedures e Disconnect C lead wire e Check voltage on C lead wire 3V OV OK e Release shu
62. heck resistance with a digital voltmeter it should normally be lower than several ohms Rear of head amplifier circuit board z Rear of circuit board t N M aT power supply for head amplifier a Connect Digivot 2 ene Lote 9 ERIT RS NE s DS 12457 9 SS ZAC CSS ue Rn ee IRS jJ fae Betas zj der CONTE an N 2 ar ies Sis AREAS WE An nd Connected on the rear 101 i fies Se Check for mis connection Ti E Co red E 160 b improper soldering of RV111 RV111 improperly soidered e Integration O P adjusting resistor e Bar indication fixed on low juminance side Head amplifier c Shorting between bipolar IC pin No 8 and RV111 pin No 9 e SB signal pin shorted to 1 8 1V IC leg e Bar indication fixed on low luminance side Shorted E 161 3 3 Shutter Locked e Indication normal abnormal indication should be corrected in advance e Preparations 1 Measuring instruments Digital voltmeter or circuit tester Synchroscope storage AUTO or MANUAL B if camera is inoperative in AUTO and MAN UAL modes 3 Perform checks by operating the shutter v te 3 2 Camera mode 1 Diagnosis with synchroscope 1 MSWOK Waveforms on M SW and RS circuit board 1 Normally OV gt 3V vec 29c2 7 x M SW Synchro GND a lin 2 When waveform is invariable B 1 M SW defective 2 B lead
63. in this case indicator circuit LCD D or LCD is defective Check indicator circuit When shutter operation is abnormal 2 TV AV circuit defective ICO HR 3010 Shorted 139 3 CV SV circuit defective e Bar indication rather too high Camera body D Shorted 8 133 460 e Lead wire compressed against top cover Rear surface RV110 shorted to camera body 4 BV level converter circuit defective e Bar indication made over by positive voltage applied to 8V 1 BV2 or BV3 e Check each voltage 3 V indicates shorting between circuit and camera body This trouble occurs rather rarely Digivol M ATS Iam BV2 Voltage exceeding 2 3V indicates trouble E 140 BV output too high Measure BV input voltage When it is 300 mV or more higher than Vref 1 8 V head amplifier or related part is defective Check voltage with a synchroscope A digital voltmeter may be used though it provides unstable reading Head amplifier or related part defective See page E 151 Head amplifier output abnormal For accurate check V For simple check m Synch Synchro DC DC 02v 02S E 141 7 2 1 2 Bar Indication Uncharged with Data input e Bar indication is provided but invariable with data input e Preparations 1 Measuring instruments lt Digital voltmeter or circuit tester 7 Synchroscope 2 Mode AUT
64. its are normal after 1 Detaching the top cover 2 Disconnecting lead wires for the self timer mode 3 Setting the camera in the SELF mode by using tweezers Pattern broken Digivol Mode Check the patterns for proper connec A tion between front Le BEN and rear surfaces Se SAIO G Pev K g f m e il BERE W OFF in reset condition gt Eum g A Liwhen B C voltage exceeds 2 75V 144 f 3 RYO O fsa The reset circuit 222 565 eL MG1 ze controls LED Uo acy T a MET E 54 IV TROUBLESHOOTING OF ELECTRIC SYSTEM 1 Diagnosis Flow Chart e The diagnosis flow chart is given on a premise that the mechanical system can operate normally e After understanding symptom correctly check the electric system in the sequence illustrated by the following flow chart START Preliminarily confirm battery voitage with a circuit tester First check whether or not indication is normal Then check whether the camera s set in the AUTO or 1 CPU oscillator NO A ee Eisetrie MANUAL mode 1 Reset circuit system deadi Some function operative 2 Battery chamber and related parts 3 CPU IC 4 B P IC etc defective 2 B P power supply circuit BC LI YES NO iLED not light land PCV not sound Shutter operates BC operative 1 B C circuit or 2 B C input abnormai
65. ly average exposure in SPOT mode a Indication obtained after detaching top cover e Disconnect gray and red lead wires from top cover Short terminals with tweezers 1 When SPOT is indicated Check the following items e Wire breakage between top cover and M circuit board irrui Digivol e Ucircuit board defective 2 R Check e SW10 defective soldering e For checking pattern measure resistance with a digital voltmeter should be 02 2 When SPOT is not indicated Check the following items e Pattern broken between R and No 16 l mew 10 e Pattern broken between H and No eund Check lead wires 17 SW107 e Defective soldering of CPU No 16 Check contact and No 17 b HA and HB signals provided pee CPU No 55 E L pint Digivol le Digivot Q CPU No 56 H 3V H i When HA or HB not provided CPU 1C defective When HA and HB provided Indication obtainable Digivol E 129 3 HI LIGHT not indicated e Normal operation in SPOT mode Short set mode e Hi LIGHT not indicated bar indication D S P connect immovable and shutter speed invariable a HI LIGHT indicated after detaching top cover e Disconnect orange and gray lead wires from top cover e Short terminals with tweezers SPOT should be kept indicated 1 When HI LIGHT is indicated Check the following items e Wire breakage between top plate and M circuit board e Ucircuit
66. n 9 Head amplifier or related part defective BV output is not provided or invariable Head amplifier or part related to its input output abnormal Indication abnormal due to defective head amplifier or related part This type of trouble should be considered separately from exposure e Preparations 1 Measuring instruments Digital voltmeter or circuit tester 2 Synchroscope z Luminance box 2 Mode AUTO or MANUAL Lens should be attached in position 3 Light LCD in viewfinder e Shutter dial must not be set at B or mecha 1 60 1 BV input provided from head amplifier Synchro terminal Synch EAM e Measure voltage with a synchroscope OC 0 2V 0 28 A digital voltmeter is usable though read ing is unstable on it 1 Check BV1 input voltage e At BV11 and F5 6 i Average BV 170 25 mV Spot BV 170 25 mV RV105 E151 2 When BV1 input voltage is not provided e When no output is provided BV1 check output on pin No 7 of bipolar IC I som ete 7 evan Head amplifier UER ot vwm wrtonencws A s 3 H Fos iv TRa o0 amets ron M Bipolar id N ey i Eee eae ee cere cs N IN G 1 8V f Synchro Bc Synchro C114 e At BV11 and F5 6 DC 0 2V 0 28 aui dct is 170 20 mV Remove adhesive agent from bipolar iC leg No 7 Spot BV 170 20mV B 3 When input voltage is applied to pin No 7 and not applied to BV1 leg No 77
67. n and yellow lead wires from top cover e Short terminals by using tweezers 1 When MEMO is indicated Check the following items e Wire breakage between top cover and M circuit board e Ucircuit board defective e SW112 For checking pattern measure resist ance with a digital voltmeter should Short set mode be 01 Digivol b Check soldering 2 When MEMO is not indicated Check as follows e CLR performed e When CLR is not performed check pattern for breakage between Y and No 18 Check contact on SW112 b When CLR is normal CPU IC defective Note When SHADOW is not indicated check pattern for breakage between C and No 14 E 132 5 Flash OVER UNDER not indicated e Normal operation in AUTO mode DC 3 6V or higher with LCD detached e Flash operates normally DC 3 0V or higher with LCD attached e Set camera in AUTO mode and attach flash Tee in position Ue 7 e Set flash in OVER and UNDER condition e t Check a Indication circuit QK e Check LCD for its norma operation Apply positive voltage to LCD D No 60 2 OK when all items are indicated e Check LCD D for its normal operation OK when all the other items are indicat ed normally T tat e wee as cr S Nahe E et t be A aC YR porn aan o bw AU dee EL e Check LCD D IC leg and pattern for detect or breakage Output provided to IC No 16 No 20 and No 54 DC 3 6 V or higher OK Camera bo
68. ndication E 129 Shutter operation normal Circuit other than LCO D IC defective Indication provided in MANUAL mode E 128 circuit board E 128 Indication not provid ed in MANUAL MOOE E 1 28 HA or HB signal not provided E 128 SPOT indication provided E 129 After detaching top cover set a mode E 129 SPOT indication not provided E 129 HA HB signai not provided E 129 E 64 mim LERAL I LCD D output abnormal LCD D 1C pin defective E 127 Pattern broken between LED D and LCD E 127 SV circuit board SW defective E 128 P lead wire broken E 128 Pattern broken P CPU pin No 13 E 128 Pattern broken P CPU pin No 19 E 128 Improper soldering of CPU pin No 13 or 19 E 128 CPU Pin No 55 or 56 defective E 128 Wire breakage between top cover and M circuit board E 129 U DO g Cerect E 129 sW107 defective E 129 Pattern broken 1 between R and Pin No 16 2 between H and pin No 17 E 129 CPL Improper soldering of pin No 16 or 17 E 129 CPU Improper soldering of pin No 55 or 56 E 129 Wire breakage between top plate and M circuit bodfd After detach ing top cover set a mode 2 HI LIGHT indicated U circuit board defective 3 E 130 3 SW 108 defective z E 130 o Pattern broken between D and pin No 15 HI LIGHT not in
69. oken 6 CPU leg No 32 improperly soldered 4 FLASH LED only not light FLASH LED not light 1 LED defective 2 D lead wire broken or improperly soldered 3 Q106 broken 4 Pattern broken 8 R115 broken 6 CPU leg No 33 improperly soldered Leg No 33 E 197 5 6 7 8 BC and SELF LED not light 1 W lead wire broken or improperly soldered 2 A lead wire broken or improperly soldered 3 R112 or R401 broken 4 Q401 broken B B lead wire broken or improperly soldered 6 B P leg No 41 improperly soldered 7 LEO defective e When PCV sounds normally and LED does not light in B C or SELF mode only CPU or B P is defective MEMO LED only not light 1 U circuit board defective 2 W lead wire broken 3 R117 broken 4 Pattern breken 5 CPU leg No 31 improperly soldered 6 LED defective LED kept lit cannot be extinguished 1 MEMO LED not extinguished Q104 shorted or broken 2 LAMP LED not extinguished Q105 shorted or broken 3 FLASH LED not extinguished Q106 shorted or broken 4 SELF LED not extinguished Q401 shorted or broken LED lit momentarily during mode switching See Reset Circuit Abnormal on page E 200 E 198 BC and SELF LED not light R112 Must be continuous Must be continuous 31 3 12 PCV Defective e LCD indication is normal P 1 Sounding too low Araidite or Bo Aron Alpha e e improper bonding o
70. on is abnormal in MANUAL mode only regeneration capacitor or related part is defective Otherwise IC is defective e When TV input is abnormal indication ME E becomes also abnormal ti Bf BOO C104 In such a case correct indication first d Short both ends with C104 broken or defective tweezers Short both ends of C104 with tweezers If shutter is kept open C104 is defective E 185 3 6 Flash Circuit Defective e Preparations 1 Measuring instruments Digital voltmeter or circuit tester gt Synchroscope storage 2 Mode AUTO 3 Others Detach top cover Do not remove L termina K TTL P and X shielded wire for flash Lead wires may be extended for canvenience of checks Connect top cover to camera body with alligator connector Attach flash T20 or 32 in position 1 Flash mode unswitchable e Check procedures 1 Set acircuit tester at x1 kQ range 0 06mA 2 Connect black and red rods of the circuit tester to camera body and L terminal respec tively 3 OK when LCD indicates FLASH mode 60 e Set camera in AUTO mode 1 Camera cannot be set in FLASH mode with shoe Check in the procedures similar to those rod of circuit described above with red tester connected to L terminal a Camera cannot be set in FLASH rnode with M circuit board 1 Pattern broken 2 B P leg No 47 improperly soldered 3 B P leg No 40 improperly soldered 4 CPU leg No
71. operative in B CHECK AUTO and MANUAL modes e Troubleshocting is given on a premise that the mechanical system operates normally e Preparations 1 Measuring instruments Digital voltmeter or circuit tester Synchroscope 2 Mode B C mode unless other wise specified When the camera is inoperative in the B C mode attach the lens and check the camera in the AUTO or MANUAL mode 1 Power supplied to circuit board Power supply voltage 2 90 V or higher OK e When power supply voltage is lower than 2 65 V 1 Check battery capacity 2 Check power supply lead wire for breakage Circuit R Circuit tester should read 022 Digital voltmeter 2 9V or higher OK 95 2 Power supplied to CPU i 7 Checks of voltage and C404 CPU i 46 21 IC101 TE Digital i voitmeter DC e 2 90 V or higher OK When voltage is lower than 2 65 V 1 C404 shorted 1 Disconnect E C404 a i Digivoi Disconnect C404 is defective when the camera is opera tive after disconnecting the capacitor 2 Pattern broken Circuit tester A fA Ci Camera body Pattern check tester Q 0 e Ok when resistance is OQ at each check point m ire i i x f ohms B e Wire is broken when resistance exceeds acores of ohms E 96 3 Check of CPU legs Nos 1 and 46 o Resolder No 21 yos EE S jj
72. orm of Trg data signal with a synchroscope or check voltage with a digital voltmeter Synchro DC A When Trg data signal output is not provided GND in e Trg data kept at L level after releasing shut tef l e in this case Trg SW or related part defective Abnormal waveform S 3v ov Before shutter release After shutter release E 175 1 Trg SW or related part shorted e Check procedures Disconnect C lead wire Set camera in BULB mode Resistance between camera body and C lead wire should normally be 1 before film winding 2 ON after film winding 3 Varied from 02 to upon releasing shutter e When resistance is ON before film winding Trg SW kept ON 2 C101 shorted A e Disconnect and check C101 e Or disconnect C101 and release shutter When shutter is closed C101 is defective 3 Wire broken in Trg adj circuit e Check procedure Check continuity with a digital volt meter 1 No 56 improperly soldered 2 R102 broken 3 RV102 broken See drawing on upper right side 4 Check pattern 4 RV102 shorted to camera body e Resistance between camera body and RV 102 should normally be e Resistance of 02 indicates shorting Trg SW and related parts C101 shorted Check brekage of RV102 0 Baer a Normal resistance 1 00 2 Oto 120kQ No 56 improperly soldered Check wire breakage Check breakage of R102 RV102 shorted to
73. ormal within viewfinder e Shutter locked upon releasing it even after reset ting the camera A M to B C mode with selector lever e Main cause M SW MG1 or RS circuit board defective 1 Check of M SW e 3V applied to land of M SW e Release shutter with camera set in BULB mode e M SW or related part defective if voltage is lower than 3 V e For checking M SW by observation of waveform see the preceding page E 168 2 Chackof RS circuit board Check of MS signal to CPU Mr OK when compensation LCD stops flickering 1 No MS signal input to CPU while M SW is turned ON e Allow compensation to be indicated within viewfinder e Release shutter LCD stops flickering WT while M SW is kept ON eU e if not MS signal is not provided to CPU e When MS singal is not provided to CPU 1 Wire broken between collector of Q10 and CPU pin No 49 2 CPU pin No 49 soldered improperly 2 No MS signal input to B P e Vref switchable from 1 8 to 1 V e Measure voltage on P land e Or measure voltage on H land OV 25V S gt a H e Sud al OV 2 5V oc Digivot_ 18V 1V E 167 e When no signal is provided to B P only No signal to B P only 1 H lead wire broken or improperly soldered 2 Y lead wire broken or improperly soldered 3 Reset circuit defective Q904 R904 R905 R132 D901a D901a 3 No signal to CPU and B P e No signal to CPU and B P 1 Q103 broken 2 P le
74. pin No 55 HB 3V on pin No 56 b When no voltage is applied leg is improperly soldered or CPU IC is defective terminal E 157 c When HA and HB signals are outputted from CPU e input applied to head amplifier IC pins No 6 and No 7 Note Detach front plate for checking volt ages e After detaching front plate light LCD while supplying power from a dummy battery e Simple check 2 Measure volt ges across both ends of C401 and C402 HA C401 voltage 3V HB C402 voltage 3V us e When the simple checks indicate abnormal values check voltages on head amplifier IC pin No 6 and pin No 7 Pin No 6 HB Pin No 7 HA Digivo Procedure for indication with front plate unit only Jig battery Rear surface of Circuit board i DC E 158 d Check of HA and HB patterns Check of HA and HB patterns e When HA and HB are outputted from CPU but no input is applied to head amplifier pattern is broken e Disconnect head amplifier iC and check pattern fd as A KE 2 f I7 Ul Ee Check continuity of 11 6 56 and 7 55 6 E 159 3 Abnormal operation in DIRECT AUTO mode power supply for head amplifier e Shutter kept open in AUTO mode e BV output and integra output are not pro vided EAR e Signal provided from CPU ufa Head amplifier IC defective a and power supplied to head amplifier e C
75. rates normally indication circuit is defective LCD D or LCD e Check continuity of A B and C respectively e Check RV110 for breakage Digivol Check RV110 for breakage right and left sides inverted tn actual arrangement e Each continuity check should indicates resistance below several ohms e Resistance exceeding scores of ohms indicate wire breakage E 146 8 Bar indication invariable with BV e Check BV input voltage e For simple check measure BV 1 voltage terminal n GND e Measure voltage with a synchroscope GND in a digital voltmeter is usable though it Synchro DC provides unstable reading HER Rene 0 2V 0 28 Check voltage while varying light incident on lens 1 BV input provided from head amplifier Vref standard voltage 200 to 100 mV OK When input voltage s not applied to BV 2 The input voltage variable depending on brightness Variable OK 3 When input voltage is provided and variable depending on brightness BV level converter circuit is defective 4 When BV input voltage is not provided or Um oe invariable depending on brightness head Synchro oc amplifier is defective l 0 2V 0 28 e Check input voltage on pin No 7 of bipolar IC e When input voltage is not provided or invariable check head amplifier e See page E 151 Head amplifier or related part defective Bipolar IC CXII
76. reliable Resistors shorted to each other or broken a R301 and R302 broken soldering defective Improper soldering of IC leg No 9 Definite point mark Cer ee SS All shutter speeds AUTO e Dot 9 is indicated e HI LIGHT is indicated E 121 b R302 and R303 broken soldering defective Improper soldering of IC leg No 8 i Definite point mark i 1c x 06 00 00 06 MEMO HI LIGHT All shutter speeds i nes dE TN tera up ca rc er REA All dots but every third one are indicated at the same time HI LIGHT MEMO and 4 are indicated faintly c R301 R302 and R303 broken Definite point mark E Oi seca hath une eee cS eu Aware 60 00 00 MEMO Hi LIGHT 8 8 NIS assy Hil a a eA Pe SW e eene hee au 7 AH shutter speed AUTO Fe SR eaa gg aaa e an act nt Oe l e All dots but every third one are indicated at the same time e HI LIGHT MEMO and are indicated or eM M M Symbol MANUAL I ts T Aree tae maka ls S HiLIGHT B OSEE Sai T Cue e E ab M SR RR SOR eee SHADOW 4 Numeric AUTO e Dot is indicated HI LIGHT are indicated e SHADOW and 4 are indicated faintly d R303 and R304 broken improper soldering improper soldering of IC leg No 7 Definite point mark is indicated in MANUAL mode Bor po 9 ow 9e vo 9a 5 252 0292222422929 HI
77. screw from L circuit board 2 Draw out folded circuit board 3 Supply powe Draw out Supply power Connect with alligator connector Remove Camera body R shaft holder Remove E 114 2 Shutter kept open in AUTO mode e PCV does not sound in B C mode e Shutter locked at its second and later op erations in MANUAL mode e CPU oscillates Synchro a e OK when waveform is normal Check by voltage measurement e Normal waveform 1 On positive side of C106 Waveform of o signal 13V 15V 1V 20ms i i 2 On positive side of C107 i 09V 11V E 115 e When no waveform is observed 1 Pattern broken Circuit cl tester 29 Pattern check Ci t i Bry Keser 7 i t all Geser Circuit ie tester 9 6 M tani OST IN are cem Pattern on rear surface 14 OSC cose out 133P i Circuit o tester o w be hy CAU es A e Resistance should be OQ at each check point e When resistance is some scores of ohms wire is broken 2 Crystal oscillator QZ101 defective e Replace 3 C106 or C107 defective e After disconnecting C106 and C107 check with a circuit tester set at X10 KQ range e lf acircuit tester having X10 KO range is not available replace capacitor with new one C107 C106 116 Shutter locked e Pata input circuit defective 1 TV circuit defective
78. tance is some scores of ohms E 101 2 C114 shorted e Disconnect C114 C114 is defective when voltage is 1 8 V Other part is defective when voltage is lower than 1 8 V 3 Pattern broken e 00 OK Some scores of ohms NO 4 No 75 or soldering defective on bipolar IC supply 5 Vref shorted to blue lead wire e Check blue lead wire to see if it is shorted to power supply black lead wire Check these parts for shorting l E 102 6 Vref outputted to No 75 B P 75 ICO FIA 3000 i Digivol a py voee Digivol e 18 V OK LEM e When voltage is 0 V Bipolar IC defective 8 o Signal output provided e See page E 111 E 103 3 2 LCD Indication Abnormal 1 No indication e Preparations 1 Measuring instruments Digivol or circuit tester 2 Synghroscope 2 Mode AUTO or MANUAL lens should be attached in position 3 Light LCD indication e Shutter dial must not be set at B or mecha 1 60 1 When shutter operates normally 1 LCD POW e LCD or o signal abnormal Make sure that the shutter can be released normally 2 LC CL or SD signal abnormal in both the AUTO and MANUAL modes 3 LCD D circuit defective e B C can also Operate normally 4 LCD defective or LCD D IC defective 1 Check of LCD liquid crystal display Rubber connector e Short camera body to LCD D When indications
79. tems is traced to defective input stage or output stage display side e Specific characters and symbols faint also in other modes though visible e Defective input stage causes malfunction of shutter e Malfunction of output stage istraced to defective contact for LCD D output and LCD e Preparations s 1 Measuring instruments lt Digital voltmeter Synchroscope 2 Mode 4 AUTO or MANUAL lens should be attached in position e Should be checked at a speed other than B mecha 1 60 1 When shutter operates normally e Output stage defective e Lack of some indication items can be traced to defective IC or abnomal output from the IC LCD D circuit OK e Check output voltage from LCD D A 8 Check sequentially e Disconnect LCD e Measure voltage on each ter minal re SSS i 3 e Normal voltage on each termi A F4 Bi nal 21181 DC 3 6 to 4 0 V av terminal E 126 a When no voltage is provided to some termi nal 1 M e Resolder IC leg e Rep e Indi 17 MEMO 7 18 SHADOW HILIGHT SPOT IC leg No 14 Improper soldering of LCO D iC for that terminal Pattern broken between IC leg and LCO When 1 or 2 mentioned above is not the cause LCD D IC is defective 15 air broken pattern cation items made faint by broken leg Improper con front and rear surfaces IC leg No Indication items faded or lacked character and symbol 14 HILIGHT
80. tering Improper soldering of C112 RV110 defective Auto EE adjustment abnormal at any brightness E 193 E 85 2 8 Regeneration Time Abnormal t 1 8 adj circuit RV101 defective defective E 194 mproper sol of C101 1 2000 adj circuit Idefective E 194 l R102 or RV102 defective Regeneration time abnormali at high speed E 194 Trg SW chattering Regeneration time abnormal at Curtain postion 4 short time of 1 500 and 1 1000 deviated E 194 2 9 Malfunction of B C System e For the LED and PCV refer to the concerned items W lead wire broken Camera cannot be set in PCV not sound and B C mode LED not light E 195 Poor contact on SW105 improper soldering of CPU pin No 25 2 10 Salf Timer Inoperative e For the LED and PCV refer to the concerned items Rl or MI lead wire broken SW104 defective CPU pin No 26 defective CPU C defective M circuit board effective for setting CE circuit board or self timer mode and operating camera retated part defective E 196 M circuit board ineffective for setting self timer mode E 196 E 87 2 11 LED Abnormal C901 shorted j Q902 or Q903 broken Q901 shorted R902 or R903 broken C lead wire broken B P leg No 42 defective 2 Lamp and flash LED oot tight e W lead wire broken E 197 Lamp defective
81. to 2 6 V is outputted to pin No 49 The light control is not stopped by other stop signals When the strobe flashes see flashing circuit and exposure time is optimum the compara tor is inverted to deenergize MG2 Simultaneously the circuit set pin No 48 and pin No 49 at the L and H levels respec tively to stop flashing of the strobe Checking procedures e TTL signal Set the camera in the AUTO mode and attach the strobe in position E47 KI 9 0 o o Connect lead wires P and K as well as the shielded wire correctly from the top cover Set the strobe ready for use Connect the lead wires without assembling the top cover with the camera body Connect the strobe to the top cover and allow it to flash l At this time form the strobe flashing circuit as shown above Waveform of TTL signal DC 2V 20ms 21 1 2 e Flashing circuit 1 Flashing Circuit Circuit diagram TRG 56 data Integration 57 compensation 50 Delay of 12 5 sac due to integration compensation 80 Wiring diagram By releasing the shutter MSWON gt MG1 ON Trg OFF The Trig OFF is used as trig ger data signal H inputted from B P pin No 37 to CPU pin No 30 Upon receiving the trigger data signal the CPU outputs integrator compensation sig nak L to delay Trg 12 5 ms When X SW is turned ON pin No 59 and pin No 50 are set at the H and
82. tted No output from CPU from bipolar IC pin No 54 E 108 E 108 CPU defective 108 No input to B P m L o wo lt No output Pattern broken E 109 Improper soldering of CPU 54 pin and B P Output provided 23 pin E 109 Pattern broken improper soldering of LCD D pin No 5 leg LCOPW outputted from bipolar IC E 110 ETE Another circuit or LCD D IC defective E 110 E 60 Pattern broken E 116 Crystal oscillator defective E 116 Oscillator circyit 2 defective Shutter kept open in AUTO mode Shutter locked first and E 115 then locked C106 or C107 defective E 116 H lead wire shorted to camera body TV AN circuit defective E 117 K lead wire shorted camera body K and M lead wires shorted 3 Shutter locked E 117 BV circuit defective BV3 shorted to terminal 118 E 118 System clock circuit defective R114 broken E 118 E 118 4 Shutter operates abnormally E 119 M SW shorted to camera body Q103 E C shorted E 119 E 61 2 All items indicated 1 Trouble in either AUTO or MANUAL mode CPU defective power line broken E 120 R301 broken 120 Shutter operates normally LCD O circuit defective R308 Broken or shorted E 120 E 120 E 120 Improper soldering of LCD D 1C pin No 10 E 120 iC improper soldering of pin Nos 4 36 and 59 E 120
83. tter in BULB mode e Voltage should desirably be checked with asynchroscope e Voltage invariable 1 Lead wire or pattern broken 2 Trg SW broken or improperly soldered 3 Trg SW shorted to camera body b Trg output on B P No 80 and Trg data output voltage variable Before check make sure that Trg voltage mentioned in 1 a above is normal e 1 Check voltage on B P No 80 R127 land 2 Check voltage on CPU Trg land OV 3V in 1and 2above OK e Release shutter in BULB mode Voltage should desirably be checked with a synchroscope Check of Trg voltage Lead wire Pattern C101 check E 172 1 When neither Trg output nor Trg data output Check in ib is variable Check soldering of No 55 1 Pattern broken 2 B P No 55 improperly soldered 3 B P IC defective 2 When either voltage is variable e When no Trg output B P No 80 is pro vided B P No 80 or IC defective e When no Trg data output is provided B P No 37 or iC defective CPU No 30 defective Pattern broken j Digivor 92 See 2 below dy tensa 2 Check of Trg data voltage Check in 2 e When output is provided to B P No 80 and output is not provided to Trg data No 37 in t Digivol oc Pattern check 1 b 2 above Digvol n 1 B P No 37 defective TEE 30 ibo de 2 CPU No 30 defective 3 Pattern broken 4 B P IC defective 3 Others 1 Comparator circuit defective B P defective 2
84. wer is not supplied almost ail types of data are indicated faintly e improper soidering of LCD D IC pin No 4 36 or 59 i Digivoi IQ pui ad Should be OQ 2 R301 broken e All the items are displayed when R301 is broken 3 Improper soldering of LCD D IC leg No 10 R305 e All the items are displayed faintly when no input voltage is applied to IC leg No 10 4 R305 broken or shorted e All the items are apt to be displayed when R305 is broken or shorted E 120 3 1 Indication Unreliable unnecessary items displayed items more than necessary are displayed though all the items are not indicated e Indication unstable or varied upon mode switching e This type of trouble mostly traced to defective LCD D circuit or LCD D IC or LCD e When shutter manual mode operates abnormally in addition CPU is defective e Preparations 1 Measuring instruments Digital voltmeter or circuit tester Synchroscope 2 Mode gt AUTO or MANUAL lens should be attached in position 3 Light LCD indicator e Do not set shutter dial at B or mecha 1 60 Indication provided All the other characters and symbols are indicated very faintly e R301 shorted Indication provided All the other characters and symbols are indicated faintly e R302 R303 or R304 shorted e R304 broken l Indication provided Ail the other characters and symbols are indicated clearly e R301 R302 or R303 broken Indication un
85. wire broken 2 RS circuit board and related parts OK MS Sw O H m GND Synchro lial GNO h TB P M SW Synchro Y CPU M SW H OV gt 2 5V Y 3V 0V B P M SW CPU M SW Waveforms on M SW and RS circuit board DC 10ms Time chart uU en B M SW i Y CPU M SW E MEE ae H B P M SW j Y CPU M SW X2 wow t es UVv AZ wov id E 162 Cuase for no waveform 1 No waveform on M SW e M SW defective Lead wire broken or soldering defective 2 No waveform on both Y and H e RScircuit board defective 3 No waveform on Y only e Q103 defective e P lead wire broken 4 No waveform on H only e RScircuit board defective e Y or H lead wire broken 3 Check chattering of M SW Chattering waveform of M SW e Check procedures are the same as those de ON NES MEL scribed in 1 above M SW A e Observe waveform Program stopped halfway by turning OFF e Shutter locked at the second and later opera M SW momentarily Hons Camera body e Contact pressure too low Gh odi aV as standard Synchro 4 MG 1 OK GND Gal C MG1 C Y A ie Bipolar IC HENG P So METUS a AL E Sd amp em Y C201 D AA Aum GND Time chart 3 a gc oy 5 pte See ME AREE SAER ERES 238A RTR ET PIAI ee ee ia s iC GRECE ERI IY ET 1 ON Tc CAE ERE e RE By r 2 MG1 C SS 3 E Check taking 3V as

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